Moyer Diebel Dishwasher MD 44 User Manual
Installation/Operation Manual with Service Replacement Parts  
Rack Conveyor Dishwasher  
MD-44  
44" Single Tank with built-in electric booster  
MD-66  
44" Single Tank with 22" Prewash  
with built-in electric booster  
Single Tank  
Model MD-44  
Single Tank w/Prewash  
Model MD-66  
Dishwasher serial no.  
Issue Date: 12.2.10  
Manual P/N 114725 rev. A  
www.moyerdiebel.com  
For machines beginning with S/N RM10050001 and above  
3765 Champion Boulevard  
Winston-Salem, NC 27105  
336/661-1992 Fax: 336/661-1660  
Toll-free: 800.858.4477  
2674 N. Service Road, Jordan Station  
Ontario, Canada L0R 1S0  
905/562-4195 Fax: 905/562-4618  
Toll-free: 800.263.5798  
Printed in USA  
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ATTENTION:  
Complete the back of the POSTAGE PAID WARRANTY CARD below, then cut along  
the dashed lines and mail immediately to make sure that your machine warranty is validated.  
USE CANADIAN WARRANTY CARD IN CANADA AND USA WARRANTY CARD IN THE UNITED STATES.  
NO POSTAGE  
NECESSARY  
IF MAILED  
IN THE  
UNITED STATES  
BUSINESS REPLY MAIL  
FIRST-CLASS MAILPERMIT NO. 2101 WINSTON-SALEM, NC  
POSTAGE WILLBE PAID BYADDRESSEE  
MOYER DIEBEL  
PO BOX 4183  
WINSTON-SALEM, NC 27119-0981  
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WARRANTY REGISTRATION CARD  
Model  
Serial #  
Date of Installation:  
Company Name:  
Address:  
(Street)  
State or Province  
Zip Code  
Telephone #: (  
Contact:  
)
---  
Installation Company:  
Address:  
Telephone #:  
Contact:  
This Card Must Be Returned to Validate Machine Warranty:  
IMPORTANT IMPORTANT  
WARRANTY REGISTRATION CARD  
Model  
Serial #  
Date of Installation:  
Company Name:  
Address:  
(Street)  
State or Province  
Zip Code  
Telephone #: (  
Contact:  
)
---  
Installation Company:  
Address:  
Telephone #:  
Contact:  
This Card Must Be Returned to Validate Machine Warranty:  
IMPORTANT IMPORTANT  
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ꢀRevision History  
RevisionꢀHistory  
ꢀ
A revision might be a part number change, new instructions, or information that was not available  
at print time. We reserve the right to make changes to this manual without notice and without  
incurring any liability by making the changes. Dishwasher owners may request a revised manual,  
at no charge, by calling (800) 263-5798 in Canada.  
Revisionꢀ  
Dateꢀ  
Revisedꢀ  
Pagesꢀ  
SerialꢀNumberꢀ  
Effectivity  
Descriptionꢀꢀ  
9.30.10  
All  
RM10050001  
Released First Edition  
Added Direction Field Conversion Instructions  
12.2.10  
2-9  
RM10050001  
i
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Limited Warranty  
LIMITED WARRANTY  
Moyer Diebel, 3765 Champion Boulevard, Winston-Salem, North Carolina 27105, and P.O. Box 301,  
2674 N. Service Road, Jordan Station, Canada, L0R 1S0, warrants machines, and parts, as set out below.  
Warranty of Machines: Moyer Diebel warrants all new machines of its manufacture bearing the name  
"Moyer Diebel" and installed within the United States and Canada to be free from defects in material and workman  
ship for a period of one (1) year after the date of installation or fifteen (15) months after the date of shipment by  
Moyer Diebel, whichever occurs first. [See below for special provisions relating to glasswashers.] The warranty  
registration card must be returned to Moyer Diebel within ten (10) days after installation. If warranty card is not  
returned to Moyer Diebel within such period, the warranty will expire after one year from the date of shipment.  
Moyer Diebel will not assume any responsibility for extra costs for installation in any area where there are  
jurisdictional problems with local trades or unions.  
If a defect in workmanship or material is found to exist within the warranty period, Moyer Diebel, at its election,  
will either repair or replace the defective machine or accept return of the machine for full credit; provided;  
however, as to glasswashers, Moyer Diebel's obligation with respect to labor associated with any repairs shall end  
(a) 120 days after shipment, or (b) 90 days after installation, whichever occurs first. In the event that Moyer Diebel  
elects to repair, the labor and work to be performed in connection with the warranty shall be done during regular  
working hours by a Moyer Diebel authorized service technician. Defective parts become the property of Moyer Diebel.  
Use of replacement parts not authorized by Moyer Diebel will relieve Moyer Diebel of all further liability in connection  
with its warranty. In no event will Moyer Diebel's warranty obligation exceed Moyer Diebel's charge for the machine.  
The following are not covered by Moyer Diebel's warranty:  
a. Lighting of gas pilots or burners.  
b. Cleaning of gas lines.  
c. Replacement of fuses or resetting of overload breakers.  
d. Adjustment of thermostats.  
e. Adjustment of clutches.  
f. Opening or closing of utility supply valves or switching of electrical supply current.  
g. Cleaning of valves, strainers, screens, nozzles, or spray pipes.  
h. Performance of regular maintenance and cleaning as outlined in operator’s guide.  
i. Damages resulting from water conditions, accidents, alterations, improper use, abuse,  
tampering, improper installation, or failure to follow maintenance and operation procedures.  
j. Wear on Pulper cutter blocks, pulse vanes, and auger brush.  
Examples of the defects not covered by warranty include, but are not limited to: (1) Damage to the exterior or  
interior finish as a result of the above, (2) Use with utility service other than that designated on the rating plate,  
(3) Improper connection to utility service, (4) Inadequate or excessive water pressure, (5) Corrosion from  
chemicals dispensed in excess of recommended concentrations, (6) Failure of electrical components due to  
connection of chemical dispensing equipment installed by others, (7) Leaks or damage resulting from such  
leaks caused by the installer, including those at machine table connections or by connection of chemical  
dispensing equipment installed by others, (8) Failure to comply with local building codes, (9) Damage  
caused by labor dispute.  
Warranty of Parts: Moyer Diebel warrants all new machine parts produced or authorized by Moyer Diebel to be free  
from defects in material and workmanship for a period of 90 days from date of invoice. If any defect in  
material and workmanship is found to exist within the warranty period Moyer Diebel will replace the defective  
part without charge.  
DISCLAIMER OF WARRANTIES AND LIMITATIONS OF LIABILITY. MOYER DIEBEL'S WARRANTY IS ONLY TO THE  
EXTENT REFLECTED ABOVE. MOYER DIEBEL MAKES NO OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUD-  
ING, BUT NOT LIMITED, TO ANY WARRANTY OF MERCHANTABILITY, OR FITNESS OF PURPOSE. MOYER DIEBEL  
SHALL NOT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES. THE REMEDIES SET OUT ABOVE ARE  
THE EXCLUSIVE REMEDIES FOR ANY DEFECTS FOUND TO EXIST IN MOYER DIEBEL DISHWASHING MACHINES  
AND MOYER DIEBEL PARTS, AND ALL OTHER REMEDIES ARE EXCLUDED, INCLUDING ANY LIABILITY FOR  
INCIDENTALS OR CONSEQUENTIAL DAMAGES.  
Moyer Diebel does not authorize any other person, including persons who deal in Moyer Diebel dishwashing machines  
to change this warranty or create any other obligation in connection with Moyer Diebel Dishwashing Machines.  
ii  
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Table of Contents  
MD-44ꢀandꢀMD-66ꢀRackꢀConveyorꢀDishwashersꢀ  
Revisions to this manual...........................................................................................................i  
Limited Warranty ......................................................................................................................ii  
Model Descriptions...................................................................................................................iv  
Installation ....................................................................................................................1  
Receiving ............................................................1  
MD-44 Direction Field Conversion.......................2  
Plumbing Connections.........................................10  
Drain Connections...............................................11  
Ventilation............................................................11  
Electrical Connections.........................................12  
Chemical Signal Connections..............................14  
Vent Fan Signal Connection................................14  
Running & Table Limit Switch Connections.........14  
Curtain Locations.................................................15  
Door Safety Switches..........................................16  
Scrap Screens.....................................................17  
Installing Spray Arms...........................................18  
Installing the Pawl Bar.........................................22  
Installing the Curtains..........................................23  
Initial Start-Up Check List....................................24  
Operation..................................................................................................................... 25  
Operation.............................................................25  
Cleaning and Maintenance..................................27  
Troubleshooting...................................................30  
Service Replacement Parts..........................................................................................31  
Solid State Control Module Operation and Troubleshooting ........................................81  
Electrical Schematics ...................................................................................................93  
iii  
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Model Descriptions  
Model Descriptions  
Model MD-44  
Electric high temperature single tank rack conveyor dishwasher  
with a built-in electric booster in 40°F/22°C rise or optional 70°F/39°C rise.  
This model's direction of operation is convertible in the field.  
Model MD-66  
Electric high temperature single tank with prewash tank  
rack conveyor dishwasher with a built-in electric booster in 40°F/22°C rise  
or optional 70°F/39°C rise.  
The installation of your dishwasher must be performed by qualified electricians,  
and plumbers and serviced by authorized service technicians trained in commercial  
dishwashers.  
Defects and repairs caused by unauthorized installers will not be covered by the  
dishwasher warranty.  
iv  
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Installation  
Receiving  
!!ATTENTION!!  
Use caution when moving or lifting the dishwasher to prevent damaging the dishwasher  
or the installation site. Check doorway and passageway clearance before moving the dishwasher.  
Remove dishwasher front panels and check under the machine base for obstructions before moving.  
1. Inspect the dishwasher for shipping damage  
2. Check the dishwasher interior for curtains, panels and other supplies.  
3. Lift the dishwasher off the shipping pallet and move the machine near its permanent location.  
4. Leave a minimum of 6" between walls and the rear of the dishwasher.  
5. Level the dishwasher side-to-side and front-to-back using a bubble level.  
The dishwasher legs are adjusted by screwing them in or out.  
6. Do not remove tags attached to the utility connections.  
7. Remove the protective film from the dishwasher exterior.  
8. Remove any foreign material from the dishwasher interior.  
6"  
6"  
Wall Clearances  
1
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion  
ATTENTION  
Conversion must be performed BEFORE the machine is permanently located and utilities  
connected. Access to the rear of the machine is required to perform the conversion.  
Parts Needed for Conversion (Supplied by Others)  
Qty. 1, Street Elbow, 3/4" NPT x 90°, Brass: For R-L to L-R Conversion  
Qty. 1, Compression Fitting, 7/8" OD x 90° ELL, Brass: For L-R to R-L Conversion  
80 inches, 3/4" Copper tubing Type K: For L-R to R-L Conversion  
4
Upper  
Rinse  
Piping  
Final  
5A  
3
Booster Piping  
(From Vacuum Breaker  
to Booster)  
Rinse  
Manifold  
Curtain  
Baffle  
2
Final Rinse  
Diverter  
6
4A  
Plug  
7
Drain  
Screen  
5 Rear  
Track  
7A  
Seal  
8A  
Cap  
8 Rinse Drain  
Piping  
1 Pawl Bar  
Right to Left Direction of Operation Shown  
2
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion  
Refer to the illustration on the previous page and note that machine assemblies are numbered  
from 1-8A and labeled. To convert the machine, remove the assemblies in numerical order and  
reinstall them as described below.  
Remove the front panel.  
1. Remove the pawl bar assembly. Remove the crosshead from the end on the pawl bar.  
Reattach the crosshead on the opposite end of the pawl bar. Install the pawl bar after  
the piping changes are complete.  
1
2. Remove the curtain and curtain baffle from the unload end of the machine. The baffle is  
held by three 1/4-20 acorn nuts. Rotate the baffle 180° and install it on the studs provided  
at the opposite end of the machine. Install the curtain on the baffle.  
3. Disconnect the L-shape copper tubing running between the booster tank outlet and the  
final rinse vacuum breaker. Set the tubing aside for modification and reuse later.  
4. Remove the final rinse thermometer probe from the upper rinse piping assembly.  
Unscrew the upper rinse piping assembly and set aside.  
4A. Remove the black plug covering the hole on the top right rear of machine hood and  
install it in the hole where the upper rinse piping assembly was removed in Step 4.  
(continued on next page)  
3
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion (continued)  
5. Removing the final rinse manifold requires that the rear track be unfastened to provide clearance.  
Refer to the illustration below. Remove six bolts holding the track supports that connect the  
front and rear tracks, then remove the four bolts holding the rear track at each end of the machine.  
Pull the rear track away from the rear of the hood slightly. It is not necessary to pull the rear  
track out of the machine.  
5
5A. Remove the 1/4-20 acorn nut holding the final rinse manifold to the rear of the machine  
hood. Remove the 3/4" brass nut holding the final rinse manifold to the top of the hood.  
Be careful not to lose the gasket on the end of the rinse manifold.  
Pull the manifold down into the machine and turn the assembly so the lower rinse pipe  
points back toward the load end of the machine. Rotate the assembly toward the front  
and out of the machine.  
Install the final rinse manifold at the opposite end of the machine then reinstall the  
rear track assembly and supports.  
6. Remove the final rinse diverter. The diverter is held by four 1/4-20 acorn nuts.  
Rotate the diverter 180° and install the it on the studs provided at the opposite end of the machine.  
7. Remove the drain screen and install it on the opposite end of the machine after the drain piping  
assembly is repositioned and installed.  
7A. Remove the drain hole seal assembly on the load end of the machine and set aside.  
4
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion  
8. Remove the rinse drain piping from the unload end of the tank. To do this, remove three  
sections of black hose connecting the drain piping together (see the illustration below).  
The easiest way to remove the drain piping is from the rear of the machine.  
Remove the nipple in the 90° elbow then remove the elbow from the tank fitting.  
8
= Hose  
8A. Remove the 3/4" pipe cap from the fitting on the load end of the machine and  
install it on the tank fitting at the unload end of the machine where the drain piping  
was removed. Install the drain hole seal removed in 7A in the drain hole.  
9. Reverse the direction of the drain trunk piping by loosening the drain valve union and  
rotating the piping 180°. Tighten the drain valve union (see illustration below).  
9
(continued on next page)  
5
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion (continued)  
10. R-L to L-R Conversion ONLY  
Rotate the drain piping assembly removed in Step 8 180° and install it on the opposite  
end of the machine. The easiest way to insert the piping is from the rear of the machine.  
Install drain basket and the elbow. Screw the nipple into the elbow and connect the hoses  
to the drain piping and the drain trunk. See the illustration below.  
10  
10A  
10B  
10B  
10A. Loosen the union directly above the cross fitting and rotate piping so it aligns with  
the booster outlet.  
10B. Rotate the Street Elbow counterclockwise 90°. Screw a Street Elbow (supplied by others)  
into the existing elbow and install the existing compression fitting into the elbow.  
11. Using the L-shaped 3/4" copper tubing saved in Step 3, cut a 46-1/2" piece of tubing  
and connect it between points 10A and 10B.  
6
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion  
12. L-R to R-L Conversion ONLY  
Rotate the drain piping assembly removed in Step 8 180° and install it on the opposite  
end of the machine. The easiest way to insert the piping is from the rear of the machine.  
Install drain basket and the elbow. Screw the nipple into the elbow and connect the hoses  
to the drain piping and the drain trunk. See the illustration below.  
12  
12A  
46-1/2"  
12B  
31-1/2"  
12C  
12A. Loosen the union directly above the cross fitting and rotate the upper rinse piping so  
it aligns with the back of the machine.  
12B. Remove the upper street elbow and move the compression fitting to the lower street  
elbow then rotate the street elbow in the booster tank clockwise 90° so it points  
toward the unload end of the machine.  
12C. Cut 2 pieces of Type K, 3/4" copper tubing (supplied by others) and connect them  
using a Brass 7/8" OD x 90° ELL Compression Fitting (supplied by others). Connect  
the piping to the fitting on the booster outlet described in 12B.  
7
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion (continued)  
Changing Wire Connections in the Lower Junction Box  
The direction change requires that the rack switch and the final rinse switch connections must  
be reversed on the terminal bock located behind the front panel of the machine.  
WARNING:  
Electrocution or serious injury may result when working on an  
energized circuit.  
Disconnect power at the main breaker or service disconnect  
switch before working on the circuit.  
Lock-out and tag the breaker to indicate that work is being  
performed on the circuit.  
13. Remove the junction box cover and identify the large terminal block located in the  
top left corner of the box. See the illustration below.  
13  
14. Refer to the illustration on the next page for the wiring diagram of the terminal block.  
Located the wires marked 16 and 17 on the terminal block and reverse them.  
Remove the existing wire labels and change wire 16 to 17 and 17 to 16.  
Replace the junction box cover and the machine front panel.  
15. The conversion is complete.  
8
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MD-44 Direction Field Conversion  
MD-44 Direction Field Conversion  
9
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Installation  
Utilities  
Hot Water Connections  
NOTE:  
Only qualified personnel should make dishwasher plumbing connections.  
Connections must meet local plumbing and sanitary codes.  
Improper installation is not covered be the dishwasher warranty.  
Hot Water Requirements:  
1. Connect a 3/4" NPT hot water supply line to the line strainer located at the top rear of the  
dishwasher.  
2. For a dishwasher without a booster heater, the hot water connection must supply a  
minimum of 180°F/82°C measured at the dishwasher.  
3. For a 40°F/22°C rise booster heater, the hot water connection must supply a minimum of  
140°F/60°C measured at the dishwasher.  
4. For a 70°F/39°C rise booster heater, the hot water connection must supply a minimum of  
110°F/43°C measured at the dishwasher.  
5. Install a pressure regulating valve (PRV) before the dishwasher supply connection to  
maintain a flowing pressure of 20-25 PSI/137.8-172.4 kPa.  
6. Install a service shut-off valve in the supply line, as close to the dishwasher as possible.  
The size of the valve must be the same size or larger as the supply line.  
Cold Water Connections  
Cold Water Requirements:  
1. Connect a 1/2" NPT cold water supply line for a dishwasher equipped with a prewash cold  
water tempering option. Connection is located at the top of rear of the dishwasher load end.  
2. Connect a 1/2" NPT cold water supply line for dishwashers required to have a drain water  
temperature tempering option. Request a P/N 452891 for a drain tempering water kit.  
10  
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Installation  
Drain Connections  
1. The 1-1/2" drain line was removed and packed inside the dishwasher prior to shipping.  
Install the drain line once the dishwasher has been placed in its final location.  
2. Connect the 1-1/2" NPT drain line to above a drain sink or to a 1-1/2" or larger drain line  
connection.  
3. Observe all local plumbing and sanitary codes when installing.  
Ventilation Connections  
1. DO NOT VENT THE DISHWASHER INTO WALLS,  
CEILINGS OR ENCLOSED PLACES.  
2. Vent stacks with adjustable dampers are supplied with the dishwasher to connect house  
vent.  
3. Connect stainless steel water-tight duct inside the 4" x 16"/ 106mm x 407mm vent  
stacks supplied with the dishwasher.  
4. A minimum of 6 air changes per hour of kitchen is recommended  
Ventilation Guidelines:  
Dishwasher without a prewash tank option:  
Load end- 200 CFM @ 1/4" SP/ 95 Liters/second  
Unload end- 400 CFM @ 1/4" SP/ 189 Liters/second  
Dishwasher with a Prewash tank option:  
Load end- 150 CFM @ 1/4" SP/ 95 Liters/second  
Unload end- 400 CFM @ 1/4" SP/ 189 Liters/second  
11  
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Installation  
Electrical Connections  
WARNING:  
Electrocution or serious injury may result when working on an  
energized circuit.  
Disconnect power at the main breaker or service disconnect  
switch before working on the circuit.  
Lock-out and tag the breaker to indicate that work is being  
performed on the circuit.  
ATTENTION  
A qualified electrician must connect the main incoming power to the dishwasher in accordance with all  
local codes and regulations or in the absence of local codes in accordance with the National Electrical  
Code.  
!!ATTENTION!!  
Electrical and grounding connections  
must comply with the National Electrical Code  
or in the absence of a National Code then  
all Local Electrical Codes.  
MACHINE ELECTRICAL CONNECTION  
A qualified electrician MUST compare the  
electrical power supply with the machine  
electrical specifications stamped on the  
MACHINE ELECTRICAL  
CONNECTION PLATE  
located inside the control cabinet before  
connecting the main power to the dishwasher.  
1. The main incoming power to the dishwasher is made at the top of machine  
in the control cabinet.  
2. The electrician must connect the incoming power based on the information  
that is stamped on the Machine Electrical Connection Plate.  
3. Any change to the Machine Electrical Connection Plate must be approved  
by the factory in advance.  
4. The dishwasher main power terminal block is located inside the top-mounted  
control cabinet.  
5. A knock-out plug is provided at the rear of the control cabinet for electrical  
service connections.  
6. Electric blower-dryers have a separate main power connection.  
12  
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Installation  
Electrical Connections (continued)  
Motor Rotation  
1. Motor rotation was set at the factory.  
2. The conveyor drive motor rotation is indicated by a red arrow located on the side of  
the motor.  
3. Check if all motors are running in the wrong direction.  
4. Reverse the L1 and L2 wires on the output side of the dishwasher Main Terminal  
Block (MTB) located inside the top-mounted control cabinet.  
5. The photograph below shows the conveyor drive motor with its direction arrow.  
6. A wash pump/motor assembly can be seen in the background of the photo.  
WARNING:  
Moving Conveyor Parts may cause INJURY OR DEATH.  
Keep hands and clothing clear of the conveyor when the  
conveyor is moving.  
USE EXTREME CAUTION WHEN THE CONVEYOR  
IS MOVING.  
THREE PHASE  
POWER CONNECTION  
LINE IN  
L1  
L2  
L3  
GRD  
Motor Direction Rotation Label on Motor Frame.  
Main Terminal Block Inside the Top-mounted Control  
Cabinet.  
13  
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Installation  
Chemical Signal Connections  
1. Use a qualified detergent/chemical supplier  
for detergent/chemical and dispensing  
equipment needs.  
2. Labeled detergent control circuit connection  
terminals are provided in the control cabinet  
for detergent and rinse agent/sanitizer  
dispensing equipment (supplied by others).  
3. The illustration at right, shows the  
terminal board for the machine.  
SIGNAL ONLY  
VENT FAN  
120V  
4. The signal connection points include:  
• Detergent signal 120VAC, 1A max load.  
• Rinse aid/Sanitizer signal 120VAC, 1A load.  
COMMON  
RINSE AID  
120V  
5. A removable black plug is provided in the  
load end side of the wash tank for installation  
of the detergent conductivity cell.  
COMMON  
DETERGENT  
120V  
Vent Fan Signal Connection  
NOTE:  
The Vent Fan Signal Connection supplies 120VAC to a control relay (supplied by others)  
when the dishwasher is ON and O VAC when the dishwasher is OFF. Power to operate  
the vent fan (supplied by others) must be supplied separately.  
6. The Vent Fan signal connection point is located  
on the same terminal board as the chemical  
connections (see illustration above). The  
connection is:  
• Vent Fan 120VAC, 1Amp max amp load  
Running Signal and  
SIGNAL ONLY  
Table Limit Switch Connections  
MACHINE  
RUNNING  
7. Connections are provided for systems that  
require a signal to indicate the dishwasher  
is running.  
8. A signal connection is provided to indicate  
that the dishwasher has stopped due to a  
conveyor jam or when the clean dish table  
is full of racks and additional racks cannot  
exit the machine.  
TABLE  
LIMIT  
SWITCH  
9. The table limit switch option installation is  
recommended for all dishwashers and can be  
ordered from the factory by P/N 407400.  
14  
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Installation  
Curtain Locations  
1. Refer to the illustrations below and hang the curtains as shown.  
J-hooks are located in the corners of each section to accept the curtain rods.  
•
•
•
Standard long curtains  
Standard medium curtains  
Standard short curtain  
24" x 20-1/4"  
24" x 13-/14"  
24" x 6-1/4"  
2. Make sure the that the short flaps of the curtains face the load end of the dishwasher.  
Long Curtain  
Short Curtain  
Long Curtain  
Medium Curtain  
Medium Curtain  
Wash  
NOTE:  
Misplacing a curtain or failing to  
install a curtain will adversely affect  
the proper operation of the machine.  
Long Curtain  
Short Curtain  
Long Curtain  
Long Curtain  
Medium Curtain  
Medium Curtain  
Wash  
Prewash  
15  
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Installation  
Door Safety Switches  
Dishwasher access doors are equipped with a door safety switch that automatically  
stops the dishwasher pumps and conveyor drive if a door is raised while the dishwasher  
is running. In addition, the dishwasher will not start if a door is left open.  
1. If the dishwasher is running and a door is raised, then lighted GREEN START  
pushbutton goes out and the pumps and conveyor drive stop.  
2. Check the interior of the dishwasher for any dish racks still in the machine.  
These dish racks must be washed again to ensure they are washed and sanitized  
completely.  
3. To restart the dishwasher, make sure all doors are closed, then push the GREEN  
START pushbutton.  
Pump Intake Screen and Dual Float Switch  
Refer to the illustration below and note the location of the pump intake screen and dual float  
switch.  
1. Make sure the pump intake screen is installed by sliding it on the bracket located in front  
of the wash pump intake.  
2. Make sure the float balls on the dual float switch move freely on the float stem.  
3. Check the interior of the tank for any foreign objects and make sure the drain screen is  
clean.  
Pump Intake  
Screen  
Drain  
Screen  
Dual Float  
Switch  
Make sure tank is clean, the pump intake screen is installed and the dual float switch  
moves freely.  
16  
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Installation  
Scrap Screens  
1. The model MD-44 and the  
MD-66 have scrap screens in  
the top of the wash tank.  
Install four scrap screens in  
the wash tank making sure  
they fit securely without large  
gaps between them.  
Model MD-44 and MD-66 have four scrap screens in the wash tank.  
2. The model MD-66 has a  
prewash tank containing  
a single large scrap screen  
which extends from front to  
back in the prewash tank.  
The prewash screen also  
holds a refuse basket to  
facillitate cleaning when  
the machine is off.  
Install the large scrap screen  
making sure the screen fits  
securely in the front and back  
of the tank then install the  
refuse basket as shown in  
the illustration to the right.  
Never remove the prewash  
scrap screen while the dish-  
washer is running.  
Model MD-66 has a scrap screen and refuse basket located in the prewash tank.  
17  
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Installation  
Installing the Lower Spray arm Assembly  
1. The lower spray arm assembly is  
connected to the rear wall of the  
wash tank and locked into place  
by the spray arm latch.  
2. The spray arm o-ring makes a  
water-tight seal when the latch  
locks the spray arm.  
Lower Spray Arm Latch  
Spray Arm O-ring  
3. Slide the lower arm into place and  
push the latch down to lock the  
arm in place.  
Spray Arm Guide  
4. The spray pipes are supported on  
each side by the spray arm  
guides.  
18  
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Installation  
Installing the Upper Spray Arm Assembly  
The upper wash arm assembly is suspended from the top of the dishwasher hood interior  
by front and rear supports. Follow the instructions and illustrations below to install the  
upper wash arm assembly.  
Wash Arm Connection  
Rear Support  
Flange Pin  
Front Support  
Connection  
Flange  
Upper Wash Arm Assembly  
Upper wash arm assembly shown installed.  
(Note that the Wash Arm Connection Flange Pin is seated in the Connection Flange.)  
Components  
Upper Wash Arm  
Rear Support  
1. Upper Wash Arm Rear Support  
The rear support holds the wash  
arm and serves as a guide when  
the upper wash arm is pushed  
to the toward the connection  
flange at the rear of the  
1
dishwasher.  
O-ring  
2. Connection Flange  
Connection  
Flange  
3
The connection flange holds the  
wash arm securely in place when  
the upper wash arm is placed in  
position. In addition, the  
connection flange holds the wash  
arm o-ring in position.  
2
Make sure the upper spray arm o-ring is in good condition and fits  
securely in the connection flange before installing the upper  
wash arm assembly.  
3. O-ring  
The wash arm o-ring rests in the  
center of the connection flange  
and forms a water-tight seal when  
the upper wash arm is in place.  
19  
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Installation  
Installing the Upper Spray Arm Assembly (continued)  
4
Upper Wash Arm  
Rear Guide Pin  
1. Upper Wash Arm  
Rear Guide Pin  
The rear guide pin is  
attached to the rear of  
the upper wash arm. It  
mates with the upper  
wash arm rear support.  
Rear Support  
2. Connection Flange Pins  
The connection flange  
pins are welded to the  
sides of the upper wash  
arm. These pins mate  
with two slots in the  
Connection  
Flange Pin  
Connection  
Flange Pin  
5
5
Upper Wash Arm  
connection flange to  
hold the wash arm in  
place when installed.  
The upper wash arm is shown with the rear guide pin placed on the rear support  
before sliding the upper wash arm into position.  
3. Upper Wash Arm  
Front Guide Pin  
6
Upper Wash Arm Front  
The front guide pin is  
attached to the front  
of the upper wash arm.  
It mates with the front  
supports.  
Guide Pin  
4. Front Supports  
There are two fronts  
supports which hold  
the front of the upper  
wash arm in place when  
the wash arm is installed.  
Front Supports  
7
Upper Wash Arm  
The upper wash arm is shown with the front guide pin resting in the front supports.  
20  
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Installation  
Installing the Upper Spray Arm Assembly  
Installation  
Upper Wash Arm  
Front Supports  
Upper Wash Arm  
Rear Support  
1. Open the dishwasher access  
doors and check the location  
and condition of the connection  
flange o-ring. Replace the  
2
o-ring if it is worn or damaged.  
1
Place the upper wash arm rear  
guide pin in the rear support so  
the wash arm hangs in the  
support.  
Connection Flange  
Upper Wash Arm Assembly  
2. Slide the upper wash  
arm toward the rear of the  
dishwasher making sure the  
rear guide pin is centered in  
the rear supports.  
The upper wash arm assembly is shown resting on the  
upper wash arm rear support as it slides toward the connection flange.  
3. Raise the front of the wash  
arm so the connection flange  
pin mates with the connection  
flange pin slots.  
4. Swing the front of the wash  
arm up toward the front of the  
dishwasher.  
5
The wash arm front guide pin  
should be positioned close to  
the door opening and before  
the front wash arm supports.  
3
5. Slide the upper wash arm  
forward as far as it will go  
making sure that the front  
guide pin is above the front  
support notched cut-out.  
4
The upper wash arm assembly is shown resting on the  
upper wash arm rear support as it slides toward the connection flange.  
Lower the upper wash arm so  
the front guide pin seats  
securely in the front support  
notch. Installation is complete.  
21  
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Installation  
Installing the Pawl Bar  
Pawl Bar  
Crosshead  
Brass Crosshead  
Roller  
Guide Roller  
The pawl bar assembly is installed in the center of the dishwasher and moves the dish racks through  
the machine. To install the pawl bar:  
1. Position the pawl bar on the guide rollers located at each end of the machine.  
2. Lower the pawl bar so the crosshead fits on top of the brass crosshead roller.  
3. The crosshead roller must fit inside the crosshead without binding.  
4. Check the alignment of the pawl bar making sure that it rests evenly within the guide rollers.  
22  
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Installation  
Installing the Curtains  
J-hook  
Short Curtain  
Long  
Curtain  
Medium  
Curtain  
Curtain Installation Shown at the Final Rinse End of the Dishwasher  
1. Curtain are equipped with curtain rods. The rods are hung on J-hooks located in  
the top of the dishwasher.  
2. Make sure that the short flaps on the curtains face the load end of the dishwasher.  
3. Refer to page 7, Curtain Locations, for additional information on curtain placement.  
23  
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Initial Start-Up  
Check list  
1. Remove white protective film from the dishwasher exterior.  
2. Install lower panels to the dishwasher.  
3. Remove any foreign material from inside of the machine.  
4. Check dishwasher drain/overflows are closed and in securely seated.  
5. Install scrap screens, spray arms and pawl bar.  
6. Turn main utilities to the dishwasher ON. (Power, water).  
7. Make sure doors are closed.  
8. Turn dishwasher power switch ON.  
9. Check tank water temperatures reach proper levels.  
10. Check for leaks.  
11. Drain the dishwasher and check that floor drains handle the water volume leaving  
the dishwasher.  
12. Push the Start button.  
13. Open each dishwasher door to make sure the safety switch stops the conveyor.  
14. Restart the dishwasher.  
15. Insert an empty dish rack into the load end of the dishwasher.  
The pumps and conveyor will run.  
16. Allow the dish rack to travel to the unload end of the dishwasher. The final rinse  
will run.  
17. Allow the rack to exit the dishwasher. The dishwasher pumps should run an  
additional 90-seconds and stop.  
18. Push the Stop button when the machine is running and the dishwasher should stop.  
19. Push the dishwasher Power Switch OFF. The dishwasher should shut down.  
24  
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Operation  
Control Panel Operation  
The final rinse pressure gauge is located behind the control panel. The top-mounted control panel  
contains the Power ON/OFF switch, start push button, stop push button, and the water temperature  
gauges for the wash tank and the final rinse. The function of these controls are:  
A Final Rinse Pressure Gauge - Indicates the flowing water pressure during the final rinse.  
Proper reading is 20-22 PSI.  
B Power Switch -  
Turns power on and off to the dishwasher. The machine wills  
automatically when the power is turned on.  
C Cycle Light -  
Indicates when the dishwasher is ready for automatic operation.  
D Start Push button -  
Pushing the Start push button sets the machine for automatic  
operation. The conveyor and pumps start when a dish rack is  
inserted into the machine.  
E Stop Push button -  
Pushing the Stop push button stops the conveyor and pumps.  
F Temperature Gauges -  
Temperature gauges indicate the water temperature in the wash  
tank and the final rinse water temperature during the final rinse.  
ON  
20-22 PSI  
B
E
D
A
30  
POWER  
20  
40  
60  
C
PSI  
10  
50  
CHAMPION INDUSTRIES, INC.  
WINSTON-SALEM,NC  
OFF  
0
START  
STOP  
Final Rinse  
Pressure  
160°F/71°C  
180-195°F  
82-91°C  
120  
120  
40  
60  
40  
60  
20  
0
20  
80  
80  
0
100  
100  
Wash  
Final Rinse  
Temperature  
Temperature  
F
Model MD-44 Shown  
25  
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Operation  
Operation  
1. Check that the spray pipes, curtains, and scrap screens are in place and clean.  
2. Check that the overflow drains are closed.  
3. Check the chemical supplies. Turn on the detergent dispenser switches.  
4. Turn on the exhaust vent system (if applicable), and make sure it is operating.  
5. Close the door(s). Push the power switch ON, light will illuminate.  
Machine will begin to fill via the fill valve and the final rinse piping.  
6. When the tanks are full, wait until the wash tank has reached the proper temperature.  
Check the wash tank temperature gauges located on the control cabinet. Minimum wash  
temperatures are:  
•
•
•
•
MD-44 160°F/71°C to 175°F/79°C  
MD-66 160-175°F/71-79°C  
Final Rinse for all models is a minimum of 180-195°F/82-91°C.  
Prewash for MD-66 model has no temperature rating.  
7. Push the Green start button. The cycle light illuminates indicating the dishwasher  
is ready for automatic operation.  
8. Pre-scrap wares to remove large food particles and load wares into the dish racks.  
DO NOT OVERLOAD RACKS.  
9. Pegged racks are for plates and/or trays. Flat racks are for bowls and/or silverware.  
Spread silverware evenly in a single layer in a flat rack or upright (loosely packed) in a  
cutlery rack/cylinder.  
10. Push a dish rack into the load-end of the dishwasher until it contacts the idle pump  
switch lever, the conveyor and pumps will start.  
11. The dishwasher will run for 90 seconds to wash, rinse and move the dish rack out  
of the unload-end of the dishwasher.  
12. Inserting another dish rack into the machine before the first rack exits will keep the  
dishwasher running until the last dish rack exits the machine.  
13. Check the final rinse pressure and temperature as the racks pass through the final  
rinse. This final rinse pressure MUST be 20-22 psi [137.8-145 kPa] and the final rinse  
temperature MUST be a minimum of 180-195°F/82-91°C .  
14. The pumps and the conveyor drive will automatically stop after the last rack exits  
the machine.  
15. The machine may be stopped at any time during the cycle by pressing the red STOP  
pushbutton. The green light or LED will go out.  
16. Check the interior of the dishwasher for any dish racks still in the machine.  
These dish racks must be washed again to ensure they are washed and sanitized  
completely.  
17. To restart, push the green START pushbutton and push another dish rack into the  
dishwasher load-end until the pumps and conveyor start again.  
18. Repeat steps 7-10 until all wares are washed.  
26  
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Cleaning  
Cleaning  
Cleaning your dishwasher is the best maintenance you can do.  
The cleaning intervals below are the minimum requirements for most dishwashers.  
You may need to clean your dishwasher more often when washing heavily soiled wares  
or during long hours of continuous operation.  
O-ring  
Remove the wash arm end caps and flush the spray arm pipes with fresh water  
to clean the spray arm assemblies.  
Daily or every 2 hours of operation  
1. Turn power switch to OFF.  
2. Pull drain lever(s) to drain water. Remove scrap screens and scrap baskets.  
Clean inside of the tanks and flush with clean water.  
Back flush the scrap screens until clean.  
DO NOT STRIKE SCREENS OR BASKETS AGAINST SOLID OBJECTS  
3. Remove the spray arm assemblies. Remove the end cap from each spray arm.  
4. Flush the spray arms and nozzles to remove any debris.  
5. Replace the end caps. Check the condition of the manifold O-ring.  
6. Reinstall the spray arms.  
7. Remove and clean the curtains. Allow them to dry at the end of the day.  
8. Leave the doors open between operations, allowing the machine to dry.  
9. Make sure that the final rinse nozzles are clear of mineral deposits.  
10. Straighten a metal paper clip to clean the nozzles.  
11. Check the temperature and pressure gauge readings during operation.  
12. Inspect the machine for signs of water leaks.  
13. Check the chemical supplies and refill as necessary.  
27  
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Cleaning  
Cleaning (continued)  
At the End of the Day  
1. Perform Steps 1-10 on the previous page.  
2. Remove the upper and lower rinse and wash spray arms and end plugs and flush with fresh water.  
3. Clean the final rinse arm nozzles using a small paper clip.  
4. Remove the curtains and clean with fresh water.  
DO NOT USE STEEL WOOL TO CLEAN THE INTERIOR OF THE MACHINE.  
Wipe the interior and exterior of the machine with a soft cloth and a mild detergent.  
DO NOT HOSE THE EXTERIOR OF THE MACHINE WITH WATER.  
5. Reassemble the dishwasher and leave the door open to allow overnight drying  
6. Contact the chemical supplier for de-liming if required.  
De-liming  
Lime (scale) deposits are the result of minerals contained in the water feeding the dishwasher and appear  
as a white haze on the surface of the dishwasher. Severe scaling can appear as a granular deposit.  
These deposits are a result of the mineral content in the geographic area of the machine's location.  
WARNING:  
Death or injury can result from toxic fume when de-liming agents  
come in contact with Chlorine Bleach, or other chemicals that contain  
iodine, bromine, or fluorine.  
USE EXTREME CAUTION WHEN HANDLING ANY DE-LIMING AGENT  
CAUTION:  
De-liming agents can cause chemical burns.  
Wear rubber gloves, eye protection and any other protective  
clothing as instructed by a qualified chemical supplier and follow  
the instructions provided by the chemical supplier.  
28  
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Maintenance  
Maintenance  
Weekly  
1. Inspect all water lines for leaks and tighten at joints if required.  
2. Clean any detergent residue from the exterior of the machine.  
3. Check that the drain/overflow pipes seat tightly in their drains.  
4. Clean any accumulated scale from the heating element.  
5. Inspect the spray arms for any damage or missing parts.  
6. Inspect the final rinse arms for missing parts.  
7. Inspect the pawl bar and drive assembly for damage or missing parts.  
8. Check that float switches move freely.  
9. Check the idle pump actuator and the final rinse actuator for freedom of travel.  
Monthly  
1. Inspect interior of machine for lime deposits and clean.  
2. Check o-rings on spray arm piping connections.  
3. Check that the drain/overflow o-rings  
4. Clean any accumulated scale from the heating element.  
5. Inspect the spray arms o-rings and ensure all plugs are installed.  
6. Inspect the final rinse arms for missing parts and are clean.  
7. Inspect the pawl bar and drive assembly for damage or missing parts.  
8. Check that float switches move freely.  
9. Check the idle pump actuator and the final rinse actuator for freedom of travel.  
10. Check the drive clutch and adjust as necessary.  
11. Check the pump rotation and direction of rotation.  
12. Check the operation of temperature gauges or displays.  
13. Perform complete operation check.  
Yearly  
1. Contact authorized service agent to perform complete maintenance  
review of machine.  
2. Correct any abnormal situations as recommended.  
29  
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Troubleshooting  
Before calling for service check the following conditions.  
1. Dishwasher main power and water supply is on.  
2. Machine has been assembled correctly.  
3. Conveyor is clear of any obstructions.  
4. Drains are closed.  
5. Screens and pump intake screens are clear.  
6. Doors are closed and secure.  
Condition  
Cause  
Solution  
Dishwasher will not run.  
Door not closed.  
Main power OFF.  
Dishwasher OFF.  
Dish rack inserted wrong  
Close door completely.  
Check breaker on panel.  
Turn dishwasher ON.  
Check dish rack loading.  
Low or no water.  
Main water supply off.  
PRV setting incorrect  
Open supply valve.  
Adjust the PRV setting  
Clean strainer.  
Solenoid strainer clogged.  
Solenoid valve defective.  
Contact Service Agent.  
Check detergent suppy.  
Detergent not added to tank  
Poor wash results.  
Reposition wares or  
reduce amount of wares.  
Wares incorrectly loaded.  
in dishrack.  
Clean screens..  
Clogged screens .  
Clean spray arms.  
Clogged spray arms.  
Contact Service Agent.  
Check spray arms.  
Thermostat defective.  
End plugs missing.  
Water temperature low.  
Check incoming water  
temperature.  
Dishwasher stays in  
wash cycle.  
Contact Service Agent  
90-second timer defective  
Conveyor jammed or table  
limit switch has stopped  
conveyor.  
Check conveyor for jams  
Remove racks from load  
end of table.  
Dishwasher conveyor  
will not run.  
30  
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Service Replacement Parts  
Illustrations  
Page  
Control Panel................................................................................................................................................ 32  
Control Cabinet............................................................................................................................................. 34  
Extended Vent Cowls ................................................................................................................................... 36  
Wash Tank Door, Panels and Curtains......................................................................................................... 38  
Wash Tank Heat, Float Switch and Scrap Screens...................................................................................... 40  
Wash Tank Junction Box Terminal Block...................................................................................................... 42  
MD-66 Prewash Tank, Door and Curtains.................................................................................................... 44  
Fill Piping...................................................................................................................................................... 46  
Final Rinse Piping......................................................................................................................................... 48  
MD-66 Prewash Spray Arms........................................................................................................................ 50  
MD-44, MD-66 Wash Spray Arms ................................................................................................................ 52  
MD-44 Track Assembly................................................................................................................................. 54  
MD-66 Track Assembly................................................................................................................................. 56  
MD-44 Pawl Bar Assembly........................................................................................................................... 58  
MD-66 Pawl Bar Assembly........................................................................................................................... 60  
Drive Motor Assembly................................................................................................................................... 62  
Conveyor Drive Assembly ............................................................................................................................ 64  
Pump/Motor Assembly.................................................................................................................................. 66  
MD-44 Pump Installation............................................................................................................................... 68  
MD-66 Pump Installation.............................................................................................................................. 70  
Electric Booster Assembly 40°F and 70°F Rise ........................................................................................... 72  
MD-44 Drain Assembly................................................................................................................................. 74  
MD-66 Drain Assembly................................................................................................................................. 76  
Dish racks..................................................................................................................................................... 78  
31  
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Control.Panel  
1
2
12  
11  
10  
8
9
8
9
7
1
5
3
4
5
6
32  
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Control.Panel  
Item  
No.  
Part No.  
Description  
Qty.  
1
100097  
333533  
114768  
114767  
107440  
113622  
114758  
0512917  
0512216  
0512218  
114506  
0512922  
SCREW, TRUSS HD., 10-32 X 1/2" SST  
3
1
1
1
2
COVER, CONTROL CABINET  
3
DECAL 36" CONTROL CABINET 3-HOLE, PW-W-R  
DECAL 36" CONTROL CABINET 2-HOLE, W-R (not shown)  
4
5
THERMOMETER, 8FT. FLANGE (Qty..1.MD44).(Qty..3.MD66)  
THERMOMETER, 4FT. GAS FILLED (Qty..1.MD44.Only).  
PUSHBUTTON, RED SQUARE  
HOUSING, SWITCH  
A/R  
1
6
7
1
8
2
9
CONTACT BLOCK, N.O.  
2
10  
11  
12  
PUSHBUTTON, GREEN SQUARE  
LIGHT, GREEN LED 24V  
1
1
SWITCH, ON/OFF  
1
33  
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Control.Cabinet  
34  
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Control.Cabinet  
Item  
No.  
Part No.  
Description  
Qty.  
1
113936  
107171  
111153  
112482  
111497  
108122  
111624  
111623  
111629  
111627  
111629  
111627  
103310  
111833  
111827  
180171  
180171  
108424  
0503479  
111068  
100294  
114760  
109064  
114756  
114759  
111633  
111671  
180175  
180174  
180243  
180176  
180175  
180243  
108448  
180059  
180173  
114771  
114769  
114770  
114772  
LABEL, TABLE LIMIT SWITCH/ MACHINE RUN  
TERMINAL BLOCK, 4-POLE  
1
1
2
3
FUSE BLOCK, 600V 30A  
2
4
FUSE, 3.5A, LPCC 200-220-230-240/60/3  
FUSE, 2.0A, LPCC 460-480/60/3  
2
---  
5
2
CONTACTOR, MTR. 12A (Qty. 2 for MD44, Qty. 3 for MD66)  
OVERLOAD, MTR. 200-220-230-240/60/3 (.63-1.0A) Drive  
OVERLOAD, MTR. 460-480/60/3 (.4-.63A) Drive  
A/R  
1
6
---  
7
1
OVERLOAD, MTR. 200-220-230-240/60/3 (6-10A) Prewash MD66  
OVERLOAD, MTR. 460-480/60/3 (2.5-4.0A) Prewash MD66  
OVERLOAD, MTR. 200-220-230-240/60/3 (6-10A) Wash  
OVERLOAD, MTR. 460-480/60/3 (2.5-4.0A) Wash  
LUG, GROUND  
1
1
1
1
1
1
A/R  
1
1
1
1
1
1
1
1
1
4
1
1
3
3
3
3
3
3
3
3
3
1
1
1
1
---  
8
---  
9
10  
11  
12  
13  
---  
14  
15  
16  
17  
18  
19  
20  
21  
---  
22  
---  
---  
23  
---  
---  
---  
---  
---  
24  
25  
26  
27  
BLOCK, TERMINAL 175A  
CONTACTOR, HEAT 60A (Qty. 2 for 40°Rise, Qty. 3 for 70°)  
FUSE BLOCK, 600V/60A 200-220-230-240-460-480V WASH  
FUSE BLOCK 600V/60A 3P J-TYPE FOR 40°RISE BOOSTER  
FUSE BLOCK 600V/100A 3P T-TYPE FOR 70° RISE BOOSTER  
TERMINAL BLOCK, 11-POLE  
RELAY, 2 POLE 120V  
TERMINAL BLOCK, 6-POLE  
LABEL, DETERGENT/RINSE AID/VENT FAN  
TRANSFORMER, 250VA 200-220-230-240-460-480:120V  
RACK CONTROL MODULE  
SUPPPORT, PCB  
BUS SYSTEM (2-UNIT) FOR MD44  
BUS SYSTEM (3-UNIT) FOR MD66  
FUSE, 600V/50A J-TYPE 200-220V/60/3  
FUSE, 600V/45A J-TYPE 230-240/60/3  
FUSE, 600V/25A J-TYPE 460-480/60/3  
FUSE, 600V/60A J-TYPE 200-220V/60/3 40°Rise Booster  
FUSE, 600V/50A J-TYPE 230-240V/60/3 40°Rise Booster  
FUSE, 600V/25A J-TYPE 460-480V/60/3 40°Rise Booster  
FUSE, 600V/90A T-TYPE 200-220V/60/3 70°Rise Booster  
FUSE, 600V/80A T-TYPE 230-240V/60/3 70°Rise Booster  
FUSE, 600V/40A J-TYPE 460-480V/60/3 70°Rise Booster  
WIRE HARNESS, MOLEX 8-PIN INPUT  
WIRE HARNESS, MOLEX 6-PIN INPUT  
WIRE HARNESS, MOLEX 6-PIN OUTPUT  
WIRE HARNESS, MOLEX 6-PIN OUTPUT HEAT  
35  
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Extended.Vent.Cowls  
10  
10  
9
11  
11  
8
4
5
3
6
2
1
7
36  
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Extended.Vent.Cowls  
Item  
No.  
Part No.  
Description  
Qty.  
1
2
3
4
5
6
7
8
9
100073  
106026  
106482  
106014  
333092  
113828  
114622  
401487  
201589  
SCREW, 1/4-20 X 1/2" TRUSS HD., SST  
WASHER, 1/4" FLAT  
6
6
6
6
1
1
1
1
1
WASHER, LOCK 1/4" SPLIT  
NUT, ACORN 1/4-20  
SPLASH SHEILD, VENT 8" EXTENDED  
ROD, CURTAIN 5/16" X 21-1/2" SST  
CURTAIN, 21-3/4" X 13-1/4"  
VENT STACK 4" X 16"  
DAMPER REGULATOR ASSY.  
37  
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Wash.Tank.Door,.Panels.and.Curtains.  
16  
17  
13  
8
7
18  
4
4
17  
18  
21  
22  
10  
14  
18  
15  
19  
20  
25  
20  
19  
9
12  
1
23  
2
3
6
5
24  
22  
(L-R.Direction.Shown)  
11  
1
38  
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.Wash.Tank.Door,.Panels.and.Curtains  
Item  
No.  
Part No.  
Description  
Qty.  
1
100212  
108250  
109723  
113691  
113720  
113828  
308133  
317345  
328023  
331981  
333163  
333539  
333267  
329985  
113937  
113486  
100141  
100734  
106482  
106026  
106382  
108954  
106014  
113719  
114798  
SCREW, 10-32 X 3/4" TRUSS HD.  
ROD, CURTAIN  
4
1
2
3
CURTAIN, 24" X 6-1/4" (RINSE CURTAIN)  
GUIDE, U-CHANNEL, DOOR  
CURTAIN, 24" X 20-1/4"  
1
2
2
2
1
2
1
1
1
1
1
1
1
12  
4
6
5
5
6
8
3
1
1
4
5
6
ROD, CURTAIN, .31"D X 21-1/2" LG.  
BRACKET, DOOR HOOK  
BRACKET, DOOR CATCH  
BAFFLE, CURTAIN WELDMENT  
BRACKET, DOOR STOP  
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
PANEL, FRONT 44" MT-RACK  
PANEL, END, FULL MT-RACK  
DOOR, 26"  
BRACKET, WATER DIVERTER  
MAGNET, DOOR  
SCREW, 8-32 X 5/8" FLAT HD., SST  
NUT, GRIP 1/4-20 SST  
BOLT, 1/4-20 X 1/2" SST  
WASHER, LOCK 1/4" SPLIT  
WASHER, 1/4" FLAT  
SCREW, 6-32 X 1/2" TRUSS HD., SST  
GRIP NUT, 6-32 W/NYLON INSERT, SST  
NUT, ACORN 1/4-20  
SWITCH, REED ALEPH  
HANDLE, DOOR  
39  
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Wash.Tank.Heat,.Float.Switch,.and.Scrap.Screens  
26 27  
25  
21  
22  
28  
20  
21  
(L-R.Direction.Shown)  
28  
16  
19  
12  
2
2
14  
18  
17  
5
See Next Page  
8
7
C
H
13  
3
14  
29  
23  
To  
Booster  
11  
10  
4
9
H
15  
24  
6
C
1
4
H = High-Limit Thermostat  
C = Control Thermostat  
40  
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Wash.Tank.Heat,.Float.Switch,.and.Scrap.Screens  
Item  
No.  
Part No.  
Description  
Qty.  
1
100154  
100547  
100740  
102376  
104882  
106013  
107089  
107589  
108345  
109069  
110561  
113291  
111151  
113516  
113517  
113518  
201401  
323430  
107440  
108418  
108417  
109034  
305163  
333078  
305164  
100097  
107966  
106014  
106482  
106026  
100141  
333088  
HEX PLAIN NUT, 5/16-18 SST  
LOCKNUT, 1/2" NPT SST  
4
3
4
8
1
4
1
1
1
2
2
1
4
1
1
1
3
1
1
1
1
1
1
2
4
2
2
6
6
6
2
1
2
3
BOLT, HEX HD., 5/16-18 X 1" SST  
WASHER, FLAT 5/16", SST  
WASHER, FLAT SST  
4
5
6
WASHER, LOCK 5/16" SPLIT  
HEX PLAIN JAM NUT, 1/2-13 SST  
WASHER, LOCK 1/2" SPLIT SST  
GASKET, HEATER  
7
8
9
10  
11  
12  
---  
13  
---  
---  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
THERMOSTAT, CONTROL WITH CAPILLARY  
THERMOSTAT, HIGH LIMIT WITH CAPILLARY  
FLOAT SWITCH  
C-CLIP  
HEATER, 15/18.1kW 200-220/3  
HEATER, 15/16.3kW 230-240/3  
HEATER, 15/16.3kW 460-480/3  
WASHER, SPACER  
BRACKET, THERMOSTAT  
THERMOMETER, 8 FT. FLANGED  
PLUG, 1/2" NPT PLASTIC  
NUT, 1/2" NPT PLASTIC  
GASKET, 1/2" PLUG  
SCREEN SUPPORT WELDMENT  
FILLER, SCREEN  
SCREEN, SCRAP WELDMENT  
SCREW, 10-32 X 1/2" TRUSS HD.  
NUT, GRIP 10-32 W/NYLON INSERT  
NUT, ACORN 1/4-20  
WASHER, LOCK 1/4" SPLIT  
WASHER, FLAT 1/4"  
NUT, GRIP 1/4-20 SST  
ENCLOSURE WELDMENT, 3.25" X 12" X 16"  
41  
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Wash.Tank.Junction.Box.Terminal.Block  
1
5
4
6
3
2
1
7
42  
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Wash.Tank.Junction.Box.Terminal.Block  
Item  
No.  
Part No.  
Description  
END BLOCK, E/NS 35N  
Qty.  
1
2
3
4
5
6
7
114519  
114514  
114517  
114512  
114513  
114516  
114518  
2
TERMINAL, SINGLE, ST 2/5 WH (WHITE)  
TERMINAL, DOUBLE STTB 2.5  
1
4
2
6
1
1
TERMINAL, SINGLE ST 2.5 (GRAY)  
TERMINAL, SINGLE, ST 2.5 BU (BLUE)  
END COVER, SINGLE TERMINAL D-ST 2.5  
END COVER, DOUBLE TERMINAL STTB 2.5  
43  
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MD-66.Prewash.Tank,.Door.and.Curtains  
16  
13  
19  
15  
17  
18  
12  
22  
20  
21  
12  
14  
22  
23  
25  
24  
1
19  
28  
27  
26  
23  
8
10  
29  
9
11  
6
7
3
5
4
2
14  
31  
30  
L-R.Direction.Shown  
44  
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.MD-66.Prewash.Tank,.Door.and.Curtains  
Item  
No.  
Part No.  
Description  
Qty.  
1
100547  
102376  
108250  
104882  
106013  
106014  
107089  
107589  
108417  
108418  
109034  
110854  
113720  
113828  
333645  
113691  
113486  
100141  
317345  
331981  
308133  
333656  
100734  
108954  
329985  
113937  
113719  
114798  
106382  
333709  
333792  
333088  
LOCKNUT, 1/2" NPT SST  
1
3
1
2
WASHER, FLAT 5/16"  
ROD, CURTAIN  
12  
3
WASHER, FLAT .531" X 1.06" X .062"  
WASHER, LOCK 5/16" SPLIT SST  
HEX ACORN PLAIN NUT, 1/4-20 SST  
HEX PLAIN JAM NUT, 1/2-13 SST  
WASHER, LOCK, 1/2" SPLIT SST  
LOCKNUT, 1/2" NPT PLASTIC  
LOCKNUT, 1/4: PLASTIC  
1
3
3
1
1
1
1
1
1
2
1
1
2
12  
4
2
1
1
1
6
8
1
1
1
1
6
1
1
1
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
GASKET (1/2" PLLUG)  
FLOAT SWITCH, RACK MACHINE  
CURTAIN, 24" X 20-1/4"  
ROD, CURTAIN, .31"D X 21-1/2" LG.  
SCREEN WELDMENT, PREWASH MD66  
GUIDE, U-CHANNEL, DOOR  
SCREW, 8-32 X 5/8" FLAT HD., SST  
NUT, GRIP 1/4-20 SST  
BRACKET, DOOR CATCH  
BRACKET, DOOR STOP  
BRACKET, DOOR HOOK  
DOOR, 15" PREWASH  
BOLT, 1/4-20 X 1/2" SST  
GRIP NUT, 6-32 W/NYLON INSERT, SST  
BRACKET, WATER DIVERTER  
MAGNET, DOOR  
SWITCH, REED ALEPH  
HANDLE, DOOR  
SCREW, 6-32 X 1/2" TRUSS HD., SST  
REFUSE BASKET WELDMENT, MD66  
SCREEN FILLER, FRT PW MD66  
PANEL, FRONT MD66  
45  
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Fill.Piping  
6
16  
4
11  
15  
29  
MD-66  
Prewash Fill  
Only  
9
30  
5
12  
26  
16  
33  
6
4
MD-44  
Fill  
18  
13  
21  
1
11  
15  
29  
20  
23  
22  
9
5
14  
30  
19  
7
28  
5
17  
Main Water  
Connection  
21  
3
3
3
3
26  
7
8
27  
3
24  
10  
25  
17  
32  
2
18  
26  
31  
To Booster  
Inlet  
From Booster  
Outlet  
12  
(R-L.Direction.Shown)  
46  
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Fill.Piping  
Item  
No.  
Part No.  
Description  
Qty.  
1
2
3
4
5
6
---  
7
8
100135  
100171  
100184  
100206  
100209  
100500  
900836  
100571  
100599  
100709  
101259  
101397  
207082  
207036  
102388  
102392  
102435  
102438  
102442  
102444  
102470  
102505  
102525  
102549  
104429  
900837  
105976  
107550  
109879  
110768  
111437  
109903  
111472  
113352  
113392  
113357  
201029  
206383  
333654  
114384  
GAUGE, PRESSURE 0-60 PSI  
1
1
8
2
2
2
A/R  
2
2
2
1
2
1
1
1
1
2
2
2
3
1
1
1
1
1
A/R  
1
1
3
1
1
A/R  
A/R  
2
A/R  
A/R  
2
BUSHING, RED. FACE 3/4" X 1/2" BRASS  
NIPPLE, 3/4" NPT X CLOSE BRASS  
NIPPLE, 1/2" NPT X 2-1/2" LG. BRASS  
NIPPLE, 1/2" NPT X CLOSE BRASS  
VACUUM BREAKER, 1/2" NPT BRONZE  
KIT, REPAIR 1/2" VACUUM BREAKER  
UNION, 3/4" NPT BRASS  
CROSS, 3/4" NPT BRASS  
LOCKNUT, 1/2" NPT BRASS  
9
10  
11  
12  
---  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
---  
24  
25  
26  
27  
28  
---  
---  
29  
---  
---  
30  
31  
32  
33  
PLUG, 1/8" NPT SQ. HEAD BRASS  
NIPPLE, RTOE, 1/2" NPT X 7" LG. BRASS  
TUBE, BOOSTER OUTLET, 45" (L-R DIRECTION)  
TUBE, BOOSTER OUTLET, FORMED (R-L DIRECTION)  
BUSHING, REDUCING 1/2" NPT X 1/4" NPT BRASS  
BUSHING, REDUCING, 3/4" NPT X 1/2" NPT BRASS  
ELBOW, 1/2" NPT X 90° BRASS  
ELBOW, STREET, 1/2" NPT X 90° BRASS  
ELBOW, 3/4" NPT X 90° BRASS  
ELBOW, STREET, 3/4" NPT X 90° BRASS  
NIPPLE, 3/4" NPT 3" LG. BRASS  
PLUG, 3/4" NPT, SQ. HEAD BRASS  
TEE, RED, 3/4" X 1/2" X 3/4" NPT BRASS  
UNION, 1/2" NPT BRASS  
VACUUM BREAKER, 3/4" BRASS  
KIT, REPAIR VACUUM BREAKER 3/4"  
BUSH, RED, 3/4" X 1/2" BRASS  
VALVE, PRESSURE REGULATING 3/4" NPT BRONZE  
FITTING, COMP 7/8" OD X 3/4" MPT BRASS  
STRAINER, LINE 3/4" NPT BRONZE FEMALE  
VALVE, SOLENOID 3/4" NPT HW  
KIT, REPAIR 3/4" SOLENOID VALVE  
COIL, SOLENOID 3/4" 120VAC  
VALVE, SOLENOID 1/2" NPT HW  
KIT, REPAIR 1/2" SOLENOID VALVE  
COIL, SOLENOID 1/2" 120VAC  
LOCKNUT, 1/2" NPT NP  
TUBE, BOOSTER INLET, FORMED (R-L & L-R DIRECTION)  
BRACKET, FILL PIPING SUPPORT  
FITTING, COMP 7/8" OD X 1/2" MPT BRASS  
1
1
1
47  
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Final.Rinse.Piping.  
2
1
6
7
4
5
3
4
5
48  
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Final.Rinse.Piping  
Item  
No.  
Part No.  
Description  
Qty.  
1
2
3
4
5
6
7
100156  
108620  
111203  
113716  
113795  
114842  
0507451  
LOCKNUT, 3/4" BRASS  
1
1
4
2
2
1
3
GASKET, RINSE MANIFOLD, 3/4" PIPING  
NOZZLE, VEE-JET #8003  
WASH ARM ORING  
PLUG, E FINAL RINSE MANIFOLD  
MANIFOLD, WELDMENT FINAL RINSE MD-RACK  
NOZZLE, RINSE SS H-1/8-W-SS 8006  
49  
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MD-66.Prewash.Spray.Arms  
14  
8
5
3
8
1
6
13  
Rear of Hood  
11  
9
10  
12  
4
2
7
50  
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MD-66.Prewash.Spray.Arms  
Item  
No.  
Part No.  
Description  
Qty.  
1
100154  
100734  
102376  
106026  
106013  
106014  
106482  
108345  
111532  
333105  
333460  
333566  
333589  
333712  
HEX PLAIN NUT, 5/16-18 SST  
BOLT, HEX HEAD, 1/4-20 SST  
WASHER, FLAT 5/16" SST  
WASHER, FLAT 1/4" SST  
WASHER, LOCK 5/16" SST  
HEX ACORN PLAIN NUT, 1/4-20 SST  
WASHER, LOCK 1/4" SPLIT SST  
GASKET, HEATER/STANDPIPE  
O-RING  
4
4
4
4
4
4
4
2
1
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
UPPER WASH SUPPORT ROD WELDMENT, MT-RACK  
FLANGE WELDMENT, WASH SYS. CONN. MT-RACK  
BRACKET, UPPER WASH ADJUSTMENT MT-RACK  
MANIFOLD TAPER ASSY. UPPER WASH  
2
1
2
1
1
STANDPIPE WELDMENT, 1-1/4" OD MD66  
51  
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MD-44,.MD-66.Wash.Spray.Arms  
7
7
6
4
17  
20  
16  
12  
10  
2
13  
Rear of Hood  
4
10  
8
20  
8
19  
4
14  
20  
19  
2
18  
11  
15  
9
17  
3
1
8
6
52  
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MD-44,.MD-66.Wash.Spray.Arms  
Item  
No.  
Part No.  
Description  
Qty.  
1
100154  
100734  
102376  
106026  
106013  
106014  
108345  
109009  
111532  
113555  
113692  
113716  
333096  
333101  
333102  
333105  
333460  
333463  
333566  
106482  
HEX PLAIN NUT, 5/16-18 SST  
BOLT, HEX HEAD, 1/4-20 SST  
WASHER, FLAT 5/16" SST  
4
4
2
3
8
4
WASHER, FLAT 1/4" SST  
8
5
WASHER, LOCK 5/16" SPLIT SST  
HEX ACORN PLAIN NUT, 1/4-20 SST  
GASKET, HEATER/STANDPIPE  
HEX GRIP NUT, 5/16-18 SST W/NYLON  
O-RING  
8
6
4
7
2
8
8
9
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
THREADED PLUG, WASH ARM  
16  
SCREW, 3/8" X 3/4" X 5/16-18 SHOULDER  
WASH-ARMS O-RING  
2
16  
1
STANDPIPE WELDMENT 44" MT-RACK  
MANIFOLD TAPER ASSEMBLY, UPPER  
MANIFOLD TAPER ASSEMBLY, LOWER  
UPPER WASH SUPPORT ROD WELDMENT, MT-RACK  
FLANGE WELDMENT, WASH SYS. CONN. MT-RACK  
LATCH WASH SYS, LOWER MT-RACK  
BRACKET, UPPER WASH ADJUSTMENT MT-RACK  
WASHER, LOCK 1/4" SPLIT SST  
1
1
2
2
1
2
4
53  
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MD-44.Track.Assembly  
16  
15  
7
7
1
5
(L-R.Direction.Shown)  
2
6
13  
12  
7
14  
10  
3
11  
8
9
4
11  
8
54  
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MD-44.Track.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
100734  
100735  
100736  
100764  
106026  
106014  
106482  
108954  
113937  
327833  
113719  
333082  
333083  
333094  
333459  
333568  
BOLT, HEX HD., 1/4-20 X 1/2" SST  
BOLT, HEX HD., 1/4-20 X 5/8" SST  
BOLT, HEX HD., 1/4-20 X 3/4" SST  
SCREW, ROUND HEAD 6-32 X 1/2" SST  
WASHER, FLAT 1/4" SST  
8
8
2
3
4
4
4
5
16  
8
6
HEX ACORN PLAIN NUT, 1/4-20 SST  
WASHER, LOCK 1/4" SPLIT SST  
HEX GRIP NUT, 6-32 SST W/NYLON  
MAGNET, REED SWITCH  
7
20  
4
8
9
2
10  
11  
12  
13  
14  
15  
16  
PIN, IDLE PUMP SWITCH  
2
SWITCH, REED ALEPH  
2
TRACK WELDMENT, FRONT 44" MT-RACK  
TRACK WELDMENT, REAR 44" MT-RACK  
SWITCH WELDMENT, IDLE PUMP MT-RACK  
TRACK LOWER WASH SUPPORT MT-RACK  
PLATE, TRACK ADJUSTMENT MD-RACK  
1
1
2
2
4
55  
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MD-66.Track.Assembly  
16  
1
15  
7
18  
6
11  
7
3
5
5
17  
12  
2
(L-R.Direction.Shown)  
6
7
14  
10  
7
5
1
9
4
13  
8
56  
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MD-66.Track.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
100734  
100735  
100736  
100764  
106026  
106014  
106482  
108954  
113937  
327833  
333080  
333082  
113719  
333094  
333459  
333568  
333574  
333575  
BOLT, HEX HD., 1/4-20 X 1/2" SST  
BOLT, HEX HD., 1/4-20 X 5/8" SST  
BOLT, HEX HD., 1/4-20 X 3/4" SST  
SCREW, ROUND HEAD 6-32 X 1/2" SST  
WASHER, FLAT 1/4" SST  
8
8
2
3
8
4
4
5
24  
12  
24  
8
6
HEX ACORN PLAIN NUT, 1/4-20 SST  
WASHER, LOCK 1/4" SPLIT SST  
HEX GRIP NUT, 6-32 SST W/NYLON  
MAGNET, REED SWITCH  
7
8
9
2
10  
11  
12  
13  
14  
15  
16  
17  
18  
PIN, IDLE PUMP SWITCH  
2
TRACK DEVP. 44" MT-RACK  
2
TRACK WELDMENT, FRONT 44" MT-RACK  
SWITCH, REED ALEPH  
1
2
SWITCH WELDMENT, IDLE PUMP MT-RACK  
TRACK LOWER WASH SUPPORT MT-RACK  
PLATE, TRACK ADJUSTMENT MD-RACK  
TRACK DEVP. PREWASH MD66  
TRACK WELDMENT REAR PREWASH MD66  
2
2
4
1
1
57  
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MD-44.Pawl.Bar.Assembly  
1
3
2
2
5
4
1
6
14  
15  
7
12  
4
13  
15  
10  
9
11  
9
6
12  
8
21  
6
16  
17  
9
18  
20  
16  
10  
6
16  
19  
9
58  
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MD-44.Pawl.Bar.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
100141  
114824  
204513  
100002  
333079  
106482  
303926  
100755  
106026  
106014  
333085  
206966  
204910  
106138  
105299  
100097  
113714  
106481  
333084  
106486  
100734  
HEX GRIP NUT, 1/4-20 SST CTR LOCK  
SPACER, PAWL BAR  
9
10  
5
2
3
PAWL, CRADLE  
4
BOLT, 1/4-20 X 1-3/8" SST  
9
5
PAWL BAR DEVP. 44" MT-RACK  
WASHER, LOCK 1/4-20 SPLIT SST  
CROSSHEAD, PAWL BAR  
1
6
4
7
1
8
SCREW, FLAT HEAD 1/4-20 X 1/2" SST  
WASHER, FLAT 1/4" SST  
4
9
14  
8
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
HEX ACORN PLAIN NUT, 1/4-20 SST  
BRACKET, PAWL BAR ROLLER, MT-RACK  
GLIDE, ROLLER BRACKET MT-RACK  
PIN, ROLLER BRACKET  
2
4
2
ROLLER, PAWL BAR, 1" X 2-3/4"  
SPACER, SST 1/2" LG  
2
2
SCREW, TRUSS HEAD, 10-32 X 1/2" SST  
RING RETAINING, 3/8" OD SHAFT  
HEX ACORN PLAIN NUT, 10-32 SST  
BRACKET, ROLLER ASSY. SUPT., MT-RACK  
WASHER LOCK, #10 SPLIT SST  
BOLT, HEX HEAD 1/4-20 X 1/2" SST  
4
4
6
2
4
4
59  
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MD-66.Pawl.Bar.Assembly  
1
2
3
2
4
(L-R.Direction.Shown)  
5
1
4
6
15  
7
12  
13  
8
16  
14  
11  
18  
20  
16  
12  
21  
6
16  
9
17  
20  
18  
10  
22  
6
10  
6
9
19  
9
60  
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MD-66.Pawl.Bar.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
100141  
114824  
204513  
100002  
333644  
106482  
303926  
100755  
106026  
106014  
333085  
206966  
204910  
106138  
105299  
100097  
113714  
106481  
333084  
106486  
100734  
333643  
HEX GRIP NUT, 1/4-20 SST CTR LOCK  
SPACER, PAWL BAR  
10  
16  
8
2
3
PAWL, CRADLE  
4
BOLT, 1/4-20 X 1-3/8" SST  
10  
1
5
PAWL BAR DEVP, 66" MT-RACK  
WASHER, LOCK 1/4-20 SPLIT SST  
CROSSHEAD, PAWL BAR  
6
8
7
1
8
SCREW, FLAT HEAD 1/4-20 X 1/2" SST  
WASHER, FLAT 1/4" SST  
4
9
14  
12  
3
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
HEX ACORN PLAIN NUT, 1/4-20 SST  
BRACKET, PAWL BAR ROLLER, MT-RACK  
GLIDE, ROLLER BRACKET MT-RACK  
PIN, ROLLER BRACKET  
6
3
ROLLER, PAWL BAR, 1" X 2-3/4"  
SPACER, SST 1/2" LG  
3
2
SCREW, TRUSS HEAD, 10-32 X 1/2" SST  
RING RETAINING, 3/8" OD SHAFT  
HEX ACORN PLAIN NUT, 10-32 SST  
BRACKET, ROLLER ASSY. SUPT., MT-RACK  
WASHER LOCK, #10 SPLIT SST  
BOLT, HEX HEAD 1/4-20 X 1/2" SST  
CHANNEL, DRIVE SUPPORT PW 66" MT-RACK  
10  
6
8
3
6
6
1
61  
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Drive.Motor.Assembly  
3
1
15  
7
16  
7
2
4
13  
5
13  
15  
11  
12  
7
11  
17  
9
6
8
10  
14  
62  
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Drive.Motor.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
0509199  
327918  
113893  
327916  
327920  
327919  
106482  
102376  
113702  
113704  
113700  
113703  
113701  
113732  
113679  
100734  
100736  
109009  
DRIVE MOTOR SWITCH  
1
1
1
1
1
1
4
2
1
1
3
2
BRACKET, MOTOR SWITCH MOUNTING  
SHEAVE, MOTOR AK51  
3
4
PLATE, DRIVE MOTOR MOUNTING  
PLATE, 44 MOTOR ASSY. MOUNTING  
BRACKET, MOTOR SPRING MOUNTING  
WASHER, LOCK 1/4" SPLIT SST  
5
6
7
8
WASHER, FLAT 5/16" SST  
9
SPRING, 0.06" OD X 0.095" WIRE X 1.5" LG.  
BOLT, HEX HEAD, 5/16-18 X 3-1/2"  
BUSHING, THRUST 3/8" X 3.4" X 1/16" BRONZE OIL  
10  
11  
12  
13  
14  
---  
15  
16  
17  
BUSHING, FLANGE 5/8" X 7/8" X 3/8" X 1-1/8" LG. BRONZE OIL  
BUSHING, FLANGE 1/4" X 3/8" X 1/4" LG. BRONZE OIL  
MOTOR, GEAR 1/6 HP, 3PH, MV  
1
1
1
1
4
3
1
MOTOR, GEAR 1/6 HP 1PH, MV  
BOLT, HEX HEAD 1/4-20 X 1/2" SST  
BOLT, HEX HEAD 1/4-20 X 3/4" SST  
NUT, GRIP 5/16-18 W/NYLON INSERT  
63  
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.Conveyor.Drive.Assembly  
10  
1
11  
2
3
4
12  
13  
19  
5
6
7
8
9
18  
Tank Bottom  
21  
20  
14  
22  
15  
23  
24  
16  
19  
20  
21  
17  
24  
25  
64  
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Conveyor.Drive.Assembly  
Item  
No.  
Part No.  
Description  
ROLLER, CROSSHEAD  
Qty.  
1
202381  
100868  
107089  
206300  
206301  
206032  
102244  
206303  
100382  
100007  
104925  
103180  
104916  
100796  
113892  
327924  
113860  
104923  
100739  
106013  
102376  
100154  
100746  
104618  
109010  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
4
8
8
8
8
2
2
2
2
ROLLER STUD, CROSSHEAD  
NUT, JAM 1/2-13  
3
4
CRANK, RACK ARM  
5
SHAFT, 5/8" OD X 8-3/8" LG.  
HOUSING, BEARING/SEAL  
SEAL, 5/8"  
6
7
8
GASKET/BEARING, SEAL  
BEARING, JAF #EK104-10  
SCREW, 10-32 X 3/8" TRUSS HEAD  
WASHER, 1/4" X 1" X 16 GAUGE  
WIPER RING  
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
KEY, 3/16" X 3/16" X 3/4" SST  
V-BELT, 4L330  
SHEAVE, DRIVE AK59  
BRACKET, 44 DRIVE BEARING MOUNTING  
BEARING, SEALED 5/8" BORE  
SCREW, 1/4-20 X 3/8" ROUND HEAD SST  
BOLT, HEX HEAD, 5/16-18 X 3/4" SST  
WASHER, LOCK 5/16" SPLIT SST  
WASHER, FLAT 5/16" SST  
NUT, PLAIN HEX HEAD 5/16-18 SST  
BOLT, HEX HEAD, 3/8-16 X 1-1/4" SST  
WASHER, FLAT 3/8" SST  
NUT GRIP, 3/8-16 W/NYLON INSERT  
65  
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.Pump/Motor.Assembly  
1
2
3
66  
Download from Www.Somanuals.com. All Manuals Search And Download.  
.Pump/Motor.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
114347  
PUMP/MOTOR ASSEMBLY (INCLUDES ITEMS 2-3)  
208-240/460/60/3 2HP  
1
2
3
114795  
114793  
PUMP SEAL ASSEMBLY  
1
1
IMPELLER, 3.78" OD, COMPOSITE MTL  
67  
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MD-44.Pump.Installation  
10  
13  
17  
11  
5
12  
8
15  
18  
3
Wash  
5
3
4
4
9
6
4
1
6
16  
1
14  
2
7
68  
Download from Www.Somanuals.com. All Manuals Search And Download.  
MD-44.Pump.Installation  
Item  
No.  
Part No.  
Description  
Qty.  
1
100154  
100739  
100740  
102376  
104203  
106013  
109009  
109568  
110372  
110858  
111964  
114347  
207022  
327869  
332172  
333076  
319742  
333469  
HEX PLAIN NUT, 5/16-18 SST  
8
4
2
BOLT, HEX HD., 5/16-18 X 3/4" SST  
BOLT, HEX HD., 5/16-18 X 1" SST  
WASHER, FLAT 5/16" SST  
3
8
4
16  
2
5
CLAMP, HOSE M52 SST GEAR TYPE  
WASHER, LOCK 5/16" SPLIT SST  
HEX GRIP NUT, 5/16-18 SST W/NYLON INSERT  
GASKET, PUMP SUCTION  
6
16  
2
7
8
1
9
HOSE, PUMP SUCTION  
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
HOSE CLAMP, HIGH PRESSURE  
HOSE CLAMP, HIGH PRESSURE  
PUMP/MOTOR ASSY. 208-240/460/60/3 2HP  
HOSE, PUMP DISCHARGE  
1
1
1
1
PLATE, E PUMP MOTOR SUPPORT  
PLATE, PUMP SUCTION HOOD  
1
1
BRACKET WELDMENT, PUMP MOTOR SUPPORT  
PUMP SUCTION SCREEN, MT-RACK  
1
1
1
FLANGE WELDMENT, PUMP SUCTION MT-RACK  
69  
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MD-66.Pump.Installation  
70  
Download from Www.Somanuals.com. All Manuals Search And Download.  
MD-66.Pump.Installation  
Item  
No.  
Part No.  
Description  
Qty.  
1
100154  
100739  
100740  
102376  
104203  
106013  
109009  
109568  
110372  
110858  
111964  
114347  
207022  
327869  
332172  
333076  
319742  
333469  
324580  
333576  
333075  
HEX PLAIN NUT, 5/16-18 SST  
16  
4
2
BOLT, HEX HD., 5/16-18 X 3/4" SST  
BOLT, HEX HD., 5/16-18 X 1" SST  
WASHER, FLAT 5/16" SST  
3
16  
32  
4
4
5
CLAMP, HOSE M52 SST GEAR TYPE  
WASHER, LOCK 5/16" SPLIT SST  
HEX GRIP NUT, 5/16-18 SST W/NYLON INSERT  
GASKET, PUMP SUCTION  
6
18  
2
7
8
1
9
HOSE, PUMP SUCTION  
2
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
HOSE CLAMP, HIGH PRESSURE  
HOSE CLAMP, HIGH PRESSURE  
PUMP/MOTOR ASSY. 208-240/460/60/3 2HP  
HOSE, PUMP DISCHARGE  
1
1
3
2
PLATE, E PUMP MOTOR SUPPORT (WASH)  
PLATE, PUMP SUCTION HOOD  
2
1
BRACKET WELDMENT, PUMP MOTOR SUPPORT  
PUMP SUCTION SCREEN, MT-RACK (WASH)  
FLANGE WELDMENT, PUMP SUCTION MT-RACK  
SUCTION SCREEN (PREWASH)  
1
1
1
1
1
1
FLANGE WELDMENT, PREWASH PUMP SUCTION  
PLATE, PUMP MOTOR SUPPORT (PREWASH)  
71  
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Electric.Booster.Assembly.-.40°F.and.70°F.Rise  
To Final Rinse  
25  
22  
4
24  
(L-R.Direction.Shown)  
2
Water  
Inlet  
6
5
4
19  
17  
23  
3
8
16  
4
9
1
7
20  
22  
21  
18  
9
10  
13  
11  
15  
14  
12  
72  
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.Electric.Booster.Assembly.-.40°F.and.70°F.Rise  
Item  
No.  
Part No.  
Description  
Qty.  
208-220/60/3 40°F Rise - 16kW  
1
2
3
111235  
107909  
111235  
HEATER, 5kW  
HEATER, 6kW  
HEATER, 5kW  
1
1
1
208-220/60/3 70°F Rise - 27kW  
1
2
3
111232  
112059  
111235  
HEATER, 10kW  
HEATER, 12kW  
HEATER, 5kW  
1
1
1
230-240/60/3 40°F Rise - 16kW  
1
2
3
111236  
114030  
111236  
HEATER, 5kW  
HEATER, 6kW  
HEATER, 5kW  
1
1
1
230-240/60/3 70°F Rise - 27kW  
1
2
3
111233  
111334  
111236  
HEATER, 10kW  
HEATER, 12kW  
HEATER, 5kW  
1
1
1
460-480/60/3 40°F Rise - 16kW  
1
2
3
111237  
114031  
111237  
HEATER, 5kW  
HEATER, 6kW  
HEATER, 5kW  
1
1
1
460-480/60/3 70°F Rise - 27kW  
1
2
3
111234  
112060  
111237  
HEATER, 10kW  
HEATER, 12kW  
HEATER, 5kW  
1
1
1
4
5
6
7
8
9
109985  
100003  
106482  
328254  
100739  
102376  
106013  
100154  
110561  
109069  
107697  
106026  
108576  
102505  
100113  
414331  
102490  
102442  
109879  
206383  
102444  
207082  
SEAL, ELECTRIC HEATER FLANGE  
NUT, PLAIN 1/4-20 SST  
WASHER, LOCK 1/4" SPLIT  
BRACKET, FRONT BOOSTER  
BOLT, 5/16-18 X 3/4" HEX HD. SST  
WASHER, FLAT 5/16"  
WASHER, LOCK 5/16" SPLIT  
NUT, PLAIN 5/16-18 SST  
THERMOSTAT, HIGH LIMIT WITH CAPILLARY  
THERMOSTAT, CONTROL WITH CAPILLARY  
NUT GRIP, 1/4-20 WINYLON INSERT  
WASHER, FLAT 1/4"  
COVER, BOOSTER, NO CUTOUT  
PLUG, 3/4" NPT BRASS  
3
9
9
1
2
4
2
2
1
1
3
3
1
1
1
1
1
1
2
1
2
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
CAP, 3/4" NPT SST  
TANK BOOSTER  
NIPPLE, 3/4" NPT X 3-1/2" LG. BRASS  
ELBOW, 3/4" NPT X 90° BRASS  
FITTING, COMP 7/8" OD X 3/4" NPT BRASS  
TUBE, 3/4" COPPER TYPE K  
ELBOW, STREET, 3/4" NPT X 90° BRASS  
TUBE, FINAL RINSE VERTICAL  
73  
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MD-44.Drain.Assembly.Model  
20  
30  
3
31  
(L-R.Direction.Shown)  
25  
29  
5
12  
10  
6
7
13  
11  
24  
11  
16  
19  
14  
17  
22  
9
26  
4
2
10  
23  
9
21  
28  
11  
27  
1
15  
18  
8
24  
74  
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MD-44.Drain.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
100036  
100043  
100113  
100735  
100736  
102376  
102443  
102505  
105993  
106482  
107340  
107342  
107473  
108345  
109185  
110454  
111034  
111113  
114020  
114129  
114185  
114718  
114817  
205202  
304816  
333268  
333511  
601934  
114825  
333933  
305218  
TEE, 1-1/2" NPT GALVANIZED  
NIPPLE, 1-1/2" NPT X CLOSE, GALVANIZED  
CAP, 3/4" NPT SST  
1
1
1
2
4
4
1
1
2
6
4
1
1
1
2
3
4
BOLT, HEX HD., 1/4-20 X 5/8" SST  
BOLT, HEX HD., 1/4-20 X 3/4" SST  
WASHER, FLAT 5/16" SST  
5
6
7
ELBOW, 3/4" NPT X 90° SST  
PLUG, 3/4" NPT SQ. HD., BRASS  
CLAMP, HOSE M20 SST GEAR-TYPE  
WASHER, LOCK 1/4" SPLIT SST  
CLAMP, HOSE M28 SST GEAR-TYPE  
DRAIN BASKET ASSY.  
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
DRAIN TAILPIECE RINSE  
GASKET  
BUSHING, REDUCING 1-1/2" NPT X 1-1/4" NPT GALV.  
NIPPLE TOE, 3/4" NPT X 2-7/16" LG. SST  
DRAIN BODY, MACHINED  
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
NIPPLE TOE, 1-1/4" NPT X 2" LG. GALV.  
HOSE, 1-1/8" ID X 2-3/4" X 3/16" WALL  
SEAL, 2" OIL TITE  
GRIP, DRAIN HANDLE  
VALVE, BALL 1-1/2" UNION END WITH TEE HANDLE  
SLEEVE BEARING, 1/2" DIA. ROD NYLON  
HOSE, 1.625" ID X 4.75" LG. EPDM  
STRAINER, DRAIN  
DRAIN HANDLE WELDMENT  
BRACKET, DRAIN LEVER SUPPORT MT-RACK  
PIPING ASSY, RINSE DRAIN  
NAMEPLATE, DRAIN, MD-RACK  
DIVERTER, DEVELOPMENT, FINAL RINSE  
STRAINER, FINAL RINSE DRAIN  
75  
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MD-66.Drain.Asssembly  
31  
31  
36  
37  
6
13  
35  
8
18  
3
21  
(L-R.Direction.Shown)  
33  
7
9
5
24  
13  
17  
27  
16  
15  
6
20  
13  
2
25  
32  
1
8
14  
18  
24  
26  
12  
21  
23  
1
2
29  
13  
27  
4
5
30  
34  
20  
10  
28  
33  
25  
19  
1
11  
32  
15  
22  
23  
76  
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MD-66.Drain.Assembly  
Item  
No.  
Part No.  
Description  
Qty.  
1
2
3
4
5
6
7
8
9
100036  
100043  
100589  
100595  
100735  
100736  
101830  
102376  
102442  
102444  
102505  
104165  
106482  
106687  
107340  
107342  
107473  
108345  
109185  
109879  
111034  
111113  
114185  
114718  
114817  
114818  
205202  
206430  
206524  
207037  
304816  
333268  
333511  
601934  
114825  
333933  
305218  
TEE, 1-1/2" NPT GALVANIZED  
3
3
1
NIPPLE, 1-1/2" NPT X CLOSE, GALVANIZED  
UNION, 1-1/2" NPT GALVANIZED  
BUSHING, REDUCING 1-1/2" NPT X 3/4" NPT BRASS  
BOLT, HEX HD., 1/4-20 X 5/8" SST  
BOLT, HEX HD., 1/4-20 X 3/4" SST  
NIPPLE, 1-1/2" NPT X 2" LG. GALV.  
WASHER, FLAT 5/16" SST  
1
4
8
1
8
1
1
1
2
12  
1
4
1
1
2
1
2
2
1
2
2
2
1
2
1
1
1
3
2
2
1
2
1
1
ELBOW, 3/4" NPT X 90° BRASS  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
36  
37  
ELBOW, STREET 3/4" X 90° BRASS  
PLUG, 3/4" NPT SQ. HD., BRASS  
CLAMP, HOSE M40 SST GEAR-TYPE  
WASHER, LOCK 1/4" SPLIT SST  
NIPPLE, TOE 1-1/2" NPT X 2-1/2" LG. GALV.  
CLAMP, HOSE M28 SST GEAR-TYPE  
DRAIN BASKET ASSY.  
DRAIN TAILPIECE RINSE  
GASKET  
BUSHING, REDUCING 1-1/2" NPT X 1-1/4" NPT GALV.  
FITTING COMP. 7/8" OD X 3/4" MPT BRASS  
DRAIN BODY, MACHINED  
NIPPLE TOE, 1-1/4" NPT X 2" LG. GALV.  
GRIP, DRAIN HANDLE  
VALVE, BALL 1-1/2" UNION END WITH TEE HANDLE  
SLEEVE BEARING, 1/2" DIA. ROD NYLON  
CAP, 1" DIA. X 3/4" DEEP, VINYL  
HOSE, 1.625" ID X 4.75" LG. EPDM  
NIPPLE TOE, 1-1/2" NPT X 6" LG. GALV.  
HOSE, 1.875" ID X 23" LG.  
TUBE, MD-SERIES RINSE NO BOOSTER 3/4" COPPER  
STRAINER, DRAIN  
DRAIN HANDLE WELDMENT  
BRACKET, DRAIN LEVER SUPPORT MT-RACK  
PIPING ASSY, RINSE DRAIN  
NAMEPLATE, DRAIN, MD-RACK  
DIVERTER DEVELOPMENT, FINAL RINSE MD-RACK  
STRAINER, FINAL RINSE DRAIN  
77  
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Dish.racks  
2
1
78  
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Dish.racks  
Item  
No.  
Part No.  
Description  
Qty.  
1
101285  
101273  
RACK, PEG  
1
1
2
RACK, COMBINATION  
79  
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Blank.Page  
This Page  
Intentionally  
Left Blank  
80  
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Rack Control Module  
Operation  
and  
Electrical Schematics  
81  
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Rack Control Module (RCM)  
Electrical Schematic 702260 — RCM Inputs  
H1  
Input Section  
Output Section  
H1  
H5  
H3  
RCM Sections  
Refer to the illustration of the Rack Control Module (RCM)  
to the left and note the three outlined sections. The  
sections are labeled and the function of each section is  
explained below:  
Run Light  
Input Section —  
Red lights show the state of  
the inputs to the RCM.  
Final Rinse  
(RCM)  
H2  
Output Section —  
Green lights show the outputs  
from the RCM to the machine.  
Wash Fill  
Not Used  
H3  
RCM Status/Jumpers — The red RUN indicator shows  
that the RCM is energized.  
Prewash Fill  
The jumpers set-up the inputs  
and outputs for various  
machine models.  
Rack Control  
Module  
Rinse Aid  
Pumps  
(RCM)  
RCM Harness Connectors  
H4  
Note the illustration of the RCM at left and the details  
from the machine electrical schematic #702260 to the  
right. These illustrations show the location and  
connections from the RCM to the dishwasher. The  
function of the connectors are:  
Booster Heat  
(MD-66 Only)  
(RCM)  
(MD-66 Only)  
H7  
Wash Heat  
RCM Status/Jumpers  
H6  
H1 — Control Cabinet Inputs  
H2 — Control Cabinet Outputs  
H3 — Inputs from Junction Box  
H4 — Heat Outputs  
Run  
DR/Rinse Heat  
H2  
(RCM)  
Digital Display  
Rinse  
Reset  
DR Pump  
Not Used  
RCM Operation  
The insert following this page gives a detailed  
explanation of the inputs, outputs and the status  
of the indicator lights on the RCM during normal  
operation of the machine.  
Refer to these instructions and the electrical schematic  
for the operation sequence of the RCM and to aid in  
the troubleshooting of the dishwasher.  
H4  
(RCM)  
82  
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Rack Control Module (RCM) Operation  
Rack Control Module (RCM) Operation  
Input Section Red Indicator Lights  
The operation of the dishwasher and the RCM is apparent by observing the status of the indicator  
lights mounted on the RCM and the functioning of the dishwasher. The explanation of the RCM is  
given below.  
Input Section  
NOTE:  
Whenever a RED input light is ON its  
corresponding input circuit is CLOSED.  
H5  
H3  
Power -  
Pause -  
Start -  
ON when the power switch on the dishwasher  
control panel is on.  
ON when the door(s) are closed.  
OFF when a door(s) are open.  
ON when the front panel start push button  
is pressed, OFF when it is released.  
Stop -  
ON when the front panel stop push button is  
pressed, OFF when it is released.  
Table Limit -  
ON when the table limit switch is closed  
(The table limit switch is not activated).  
Jam Switch -  
ON when the jam switch is closed  
(The jam switch is not activated).  
Red lights show the status of inputs on the RCM.  
Rack Switch - ON when the rack switch is closed.  
OFF when a dishrack is inserted  
into the dishwasher.  
H3  
Final Rinse - ON when the final rinse switch  
is closed. OFF when the dishrack  
is in the Final Rinse Zone.  
Wash Flt U - ON when the wash tank is full and  
the wash upper float is up.  
Wash Flt L -  
ON when the wash tank is full and  
the wash lower float is up.  
(MD-66 Only)  
(RCM)  
(MD-66 Only)  
Prewash -  
Flt U  
ON when the prewash tank is full  
and the PW upper float is up.  
(Model MD-66 Only)  
Inputs to the RCM come from the dishwasher controls.  
Prewash -  
Flt U  
ON when the prewash tank is full  
and the PW upper float is up.  
(Model MD-66 Only)  
ATTENTION:  
The DR Level/Rinse Flt U and the Rinse Flt L are not used on the MD-44 and the MD-66 models.  
83  
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Rack Control Module Operation  
Output Section  
Rack Control Module (RCM) Operation  
Output Section Green Indicator Lights  
H1  
NOTE:  
Whenever a Green output light is ON it means  
that the RCM is providing a signal to enable its cor-  
responding circuit; however, the actual operation of  
the circuit may depend on other associated controls.  
Run Light  
Final Rinse  
Run Light -  
ON when the start switch on the dishwasher front  
control panel is pressed. The run light on the  
dishwasher front panel is also comes on.  
H2  
Wash Fill  
SUSPENDED - In the event that the wash fill or prewash fill are on for  
OPERATION  
more for more than 10 min., all inputs & outputs OFF.  
THE RUN LIGHT WILL FLASH ONCE PER SECOND.  
THE DISHWASHER POWER SWITCH MUST BE  
TURNED OFF AND ON TO CLEAR THIS CONDITION.  
Prewash Fill  
Rinse Aid  
Pumps  
Final -  
Rinse  
ON whenever the final rinse switch is activated and the  
pumps are on or if the fill valve is ON when the machine  
is filling. Jam Switch, Table Limit and Pause output  
lights must be ON.  
H4  
Wash Fill - If the Wash Flt L light is off, then the Wash Fill Green light  
is ON until the Wash Flt L and Wash Flt U red input lights  
come on. The Pause input light must be on. The Green Wash  
Fill light will stay ON for a maximum of 10 minutes.  
Booster Heat  
Wash Heat  
H6  
Prewash - If the Prewash Flt L red input light is off, then the Prewash Fill  
Fill  
MD-66  
Only  
Green light is ON until the PW Flt L and PW Flt U red input  
lights come on. The Pause input light must be on. The Green  
Prewash Fill light will stay ON for a maximum of 10 minutes.  
DR/Rinse Heat  
DR Pump  
Rinse Aid - ON when the final rinse switch is operated. OFF when the  
Jam Switch or Table Limit red output lights are OFF or if the  
Stop switch on the control cabinet is pressed. OFF when  
the RCM Timer has timed out during normal cycle.  
Pumps -  
Output is controlled by the RCM Timer. ON when the rack  
switch is activated. OFF when the Jam Switch or Table  
Limit red output light are OFF or if the Stop switch on the  
control cabinet is pressed. OFF when the RCM Timer has  
timed out during normal cycle.  
Booster - Output to Booster Heat Contactor. ON if the Wash Flt L  
Heat  
and Pause red input lights are on. OFF if Wash Flt L or  
Pause lights are off.  
Wash -  
Heat  
Output to Wash Heat Contactor. ON if the Wash Flt L  
and Pause red input lights are on. OFF if Wash Flt L or  
Pause lights are off.  
DR/Rinse Heat - NOT USED FOR MODELS MD-44 AND MD-66.  
DR Pump - NOT USED FOR MODELS MD-44 AND MD-66.  
84  
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Rack Control Module Operation  
Rack Control Module (RCM) Operation  
RCM Timer Operation  
The timer controls the drive motor, wash pump and the MD-66 prewash pump.  
The timer is internal to the RCM. The PUMPS output indicator light shows the RCM Timer is  
active.  
The timer output comes on when the rack switch opens, this turns on the PUMPS output.  
When the rack switch closes the timer counts for 90-seconds.  
After 90-seconds, the PUMPS output is turned off.  
Inserting another rack during the timing resets the timer to 90-seconds.  
The red input lights below show how the RCM inputs affect the timer’s operation,  
START light ON - Enables automatic operation  
STOP light ON - Disables automatic operation  
RACK SWITCH light OFF - Starts the timer  
TABLE LIMIT light OFF - Pauses the timer. Timing resumes when the light comes back on.  
PAUSE light OFF - Pauses the timer. Timing resumes when the light comes back on.  
JAM light OFF - Stops the machine and disables automatic operation. The front panel Start  
push button must be pressed to resume automatic operation and a dish rack  
must be inserted to start the timer.  
RCM Status and Jumper Section  
The RCM Status/Jumper Section contains one red indicator light  
and four jumpers that are associated with the set-up of the RCM.  
RCM Status/Jumpers  
RUN -  
ON when power is turned on to the RCM.  
THIS RUN LIGHT DOES NOT MEAN THAT  
THE DISHWASHER IS READY TO OPERATE.  
Run  
Reset  
JUMPERS:  
NOT USED  
Prewash -  
Enables the prewash input and output  
functions.  
AA, DR Tank, Rinse Tank - NOT USED  
Reset Button - NOT USED  
85  
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Rack Control Module Operation  
Rack Control Module (RCM) Indicator Lights  
Normal Operation Sequence  
The following illustration Plates show the condition of the indicator lights (On or Off) during the  
normal operation of the dishwasher. All lights are off when the dishwasher power is turned off.  
H1  
H5  
H3  
Run Light  
Plate 1:  
1. Doors closed.  
2. Power switch ON.  
3. POWER light ON.  
4. Floats down.  
5. Initial fill begins.  
Final Rinse  
H2  
Wash Fill  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
Rinse Aid  
Pumps  
H4  
Booster Heat  
Wash Heat  
H7  
RCM Status/Jumpers  
H6  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
H1  
H5  
H3  
Plate 2:  
1. Doors closed.  
2. POWER light ON.  
3. Floats up.  
Run Light  
Final Rinse  
4. Tanks full.  
H2  
Wash Fill  
5. Initial fill complete.  
6. Tank heat enabled.*  
7. Booster heat enabled.*  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
Rinse Aid  
Pumps  
* NOTE: Tank heat and  
booster tank heat were  
enabled as soon as the  
lower float in the wash tank  
was up.  
H4  
Booster Heat  
H7  
Wash Heat  
RCM Status/Jumpers  
H6  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
86  
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Rack Control Module Operation  
Normal Operation Sequence  
H1  
H5  
H3  
START light comes  
on when pressed  
and goes out when  
it is released.  
Plate 3:  
Run Light  
1. Doors closed.  
2. POWER light ON.  
3. Floats up.  
Final Rinse  
H2  
Wash Fill  
4. Tanks full.  
Prewash Fill  
5. Tank heat enabled.  
6. Booster heat enabled.  
7. Initial fill complete.  
= Indicator ON  
= Indicator OFF  
Rinse Aid  
Pumps  
8. Start push button  
pressed and released.  
H4  
Booster Heat  
9. RUN LIGHT ON and  
Green light on front  
panel ON.  
H7  
Wash Heat  
RCM Status/Jumpers  
H6  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
H1  
H5  
H3  
Plate 4:  
1. Doors closed.  
2. POWER light ON.  
3. Floats up.  
Run Light  
Final Rinse  
4. Tanks full.  
H2  
Wash Fill  
5. Tank heat enabled.  
6. Booster heat enabled.  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
7. Rack inserted into  
machine/rack switch  
activated.  
Rinse Aid  
Pumps  
PUMPS light ON shows  
the pumps are enabled and  
the RCM Timer is active.  
8. RCM timer active.  
Timer will begin count-  
ing down the 90 sec.  
interval when the rack  
switch is de-activated  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
RCM Status/Jumpers  
NOT USED  
Run  
DR/Rinse Heat  
9. Pumps and drive motor  
running.  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
87  
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Rack Control Module Operation  
Normal Operation Sequence  
Plate 5:  
H1  
H5  
H3  
1. Doors closed.  
2. POWER light ON.  
3. Floats up.  
Run Light  
4. Tanks full.  
Final Rinse  
5. Tank heat enabled.  
6. Booster heat enabled.  
H2  
Wash Fill  
7. Rack switch  
de-activated.  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
8. Rack has moved  
through the machine  
to the final rinse zone  
and activated the final  
rinse switch.  
Rinse Aid  
Pumps  
PUMPS light ON shows  
the pumps are enabled and  
the RCM Timer is counting  
for 90 seconds.  
H4  
Booster Heat  
Wash Heat  
9. Final rinse valve  
H7  
enabled.  
RCM Status/Jumpers  
H6  
10. Rinse aid enabled.  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
11. RCM timer counting  
down the 90 second  
time interval.  
NOT USED  
Reset  
DR Pump  
12. Pumps and drive  
motor running.  
H1  
H5  
H3  
Plate 6:  
1. Doors closed.  
2. Power light ON.  
3. Floats up.  
Run Light  
Final Rinse  
H2  
4. Tanks full.  
Wash Fill  
5. Tank heat enabled.  
6. Booster heat enabled.  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
7. Rack has exited the  
machine/final rinse  
Rinse Aid  
Pumps  
switch de-activated.  
PUMPS light OFF shows  
8. Final rinse valve  
disabled.  
the pumps are disabled and  
the RCM Timer has completed  
the 90 second time interval.  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
9. Rinse aid disabled.  
RCM Status/Jumpers  
10. RCM timer 90 second  
interval complete.  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
11. Pumps and drive motor  
off.  
Reset  
DR Pump  
88  
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Rack Control Module Operation  
Door Opened while Dishwasher is In-cycle  
Plate 7:  
H1  
H5  
H3  
1. Door(s) Opened.  
2. PAUSE light OFF.  
3. POWER light ON.  
4. RUN LIGHT OFF.  
5. Tanks full.  
Run Light  
Final Rinse  
H2  
6. Tank heat Disabled.  
7. Booster heat disabled.  
Opening the doors pauses  
the RCM timer for a maximum  
of 5 minutes. After 5 minutes,  
the machine stops, the RUN LIGHT  
goes out and the START pushbutton  
must be pressed to operate the  
dishwasher.  
Wash Fill  
Prewash Fill  
8. Pumps and drive  
disabled.  
Rinse Aid  
Pumps  
9. RCM timer paused for  
a maximum of 5  
minutes. After 5  
minutes, the machine  
stops and the START  
push button must be  
pressed to operate the  
dishwasher.  
= Indicator ON  
= Indicator OFF  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
RCM Status/Jumpers  
10. Closing the door(s)  
before 5 mins. has  
elapsed will resume  
operation where it left  
off. Run Light ON.  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
Pause light ON.  
Plate 8:  
1. Door Closed.  
Table Limit Switch Activated while Dishwasher is In-cycle  
H1  
H5  
H3  
2. POWER light ON.  
3. Table limit switch  
activated.  
Run Light  
4. TABLE LIMIT OFF.  
5. RUN LIGHT OFF.  
6. Tank heat Disabled.  
7. Booster heat disabled.  
Final Rinse  
H2  
Activating the Table Limit Switch pauses  
the RCM timer for a maximum of 5 minutes.  
After 5 minutes, the machine stops, the  
RUN LIGHT goes out and the START  
pushbutton must be pressed to operate  
the dishwasher.  
Wash Fill  
8. Pumps and drive  
disabled.  
Prewash Fill  
9. RCM timer paused for  
a maximum of 5  
Rinse Aid  
Pumps  
minutes. After 5  
minutes, the machine  
stops and the START  
push button must be  
pressed to operate the  
dishwasher.  
= Indicator ON  
= Indicator OFF  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
RCM Status/Jumpers  
10. De-activating the table  
limit switch before 5  
mins. has elapsed  
will resume operation  
where it left off.  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
RUN LIGHT ON.  
TABLE LIMIT ON.  
89  
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Rack Control Module Operation  
Jam Switch Activated while Dishwasher is In-cycle  
H1  
Plate 9:  
H5  
H3  
1. Doors closed.  
2. POWER light ON.  
3. RUN LIGHT OFF.  
4. JAM SWITCH OFF.  
5. Floats up.  
Run Light  
Final Rinse  
H2  
Wash Fill  
Activating the JAM Switch stops the  
RCM timer and the machine stops.  
The RUN LIGHT. The jam condition  
must be fixed and the START  
pushbutton must be pressed to  
operate the dishwasher.  
6. Tanks full.  
Prewash Fill  
7. Tank heat Disabled.  
8. Booster heat disabled.  
Rinse Aid  
Pumps  
9. Pumps and drive  
disabled.  
= Indicator ON  
= Indicator OFF  
H4  
10. RCM timer stopped.  
Booster Heat  
Wash Heat  
11. Start push button on  
front panel must be  
pressed to operate the  
machine once the jam  
is fixed.  
H7  
RCM Status/Jumpers  
H6  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
RUN LIGHT ON.  
JAM SWITCH ON.  
Stop Switch Pressed while Dishwasher is In-cycle  
Plate 10:  
H1  
H5  
H3  
1. Door closed.  
2. POWER light ON.  
3. Floats up.  
Run Light  
4. Tanks full.  
Final Rinse  
H2  
5. Tank heat Disabled.  
6. Booster heat disabled.  
STOP light comes  
on when pressed  
and goes out when  
it is released.  
Wash Fill  
Prewash Fill  
7. Pumps and drive  
disabled.  
Rinse Aid  
Pumps  
8. RUN LIGHT OFF.  
= Indicator ON  
= Indicator OFF  
9. RCM timer stopped.  
10. Automatic operation  
stopped.  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
11. Start push button on  
front panel must be  
pressed to operate the  
machine.  
RCM Status/Jumpers  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
RUN LIGHT ON.  
DR Pump  
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Rack Control Module Operation  
Float Operation During Initial Fill  
H1  
H5  
H3  
Plate 11:  
1. Door closed.  
2. POWER light ON.  
3. Tanks empty.  
Run Light  
Final Rinse  
ALL FLOATS DOWN  
H2  
Wash Fill  
4. Final rinse enabled.  
5. Wash fill enabled.  
Prewash Fill  
= Indicator ON  
Rinse Aid  
Pumps  
= Indicator OFF  
6. Prewash fill enabled  
MD-66 Only  
MD-66  
Only  
7. Tank heat disabled.  
H4  
H6  
Booster Heat  
Wash Heat  
8. Booster heat disabled.  
H7  
LOWER FLOATS UP  
RCM Status/Jumpers  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
9. Tank heat enabled.  
NOT USED  
Reset  
DR Pump  
10. Booster heat enabled.  
11. Final rinse, wash fill,  
prewash fill enabled.  
UPPER FLOATS UP  
H1  
H5  
H3  
12. Final rinse disabled.  
13. Wash fill disabled.  
Run Light  
14. Prewash fill disabled.  
MD-66 Only  
Final Rinse  
H2  
!! IMPORTANT !!  
Wash Fill  
If upper floats do not close  
within 10 minutes of initial  
fill, then the machine enters  
a state of SUSPENDED  
OPERATION.  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
Rinse Aid  
Pumps  
MD-66  
Only  
The final rinse, wash  
fill and prewash fill are  
disabled and the  
run light on the RCM and  
the front panel will flash on  
once per second.  
H4  
H6  
Booster Heat  
Wash Heat  
H7  
RCM Status/Jumpers  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
The machine power switch  
must be turned off and then  
back on to clear this  
condition.  
91  
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Rack Control Module Operation  
Front Panel Power Switch Turned Off while Dishwasher is In-cycle  
H1  
H5  
H3  
Plate 12:  
1. Door closed.  
Run Light  
2. POWER Switch OFF.  
3. Floats up.  
Final Rinse  
H2  
4. Tanks full.  
Wash Fill  
5. Tank heat Disabled.  
6. Booster heat disabled.  
Prewash Fill  
= Indicator ON  
= Indicator OFF  
7. Pumps and drive  
disabled.  
Rinse Aid  
Pumps  
8. RUN LIGHT OFF.  
9. RCM Status light  
OFF.  
This RUN light only shows  
power is not supplied to RCM .  
H4  
Booster Heat  
Wash Heat  
H7  
10. All Input and Output  
lights OFF.  
RCM Status/Jumpers  
H6  
NOT USED  
Run  
DR/Rinse Heat  
Digital Display  
Rinse  
NOT USED  
Reset  
DR Pump  
92  
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93  
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94  
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95  
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Intentionally  
Left Blank  
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