MTD Snow Blower 31AE640F352 User Manual

OPERATOR’S MANUAL  
SNOW THROWER  
MODEL  
31AE640F352  
IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY  
Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brush-  
covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if  
any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required  
by law (Section 4442 of the California Public Resources Code). Other states may have similar laws. Federal laws apply on federal lands. A spark  
arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131  
Cleveland, Ohio 44136-9722.  
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-9722  
770-10167D.
PRINTED IN U.S.A.  
FORM NO  
.
(6/2002)  
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SECTION 1: IMPORTANT SAFE OPERATION PRACTICES  
This symbol points out important safety instructions, which if not followed, could endanger the personal  
safety and/or property of yourself and others. Read and follow all instructions in this manual before  
attempting to operate this machine. Failure to comply with these instructions may result in personal  
injury. When you see this symbol—heed its warning.  
WARNING: Engine Exhaust, some of its constituents, and certain vehicle components  
contain or emit chemicals known to the State of California to cause cancer, birth defects or  
other reproductive harm.  
DANGER: This machine was built to be operated according to the rules for safe operation in this  
manual. As with any type of power equipment, carelessness or error on the part of the operator can  
result in serious injury. This machine is capable of amputating hands and feet and throwing objects.  
Failure to observe the following safety instructions could result in serious injury or death.  
7. Never attempt to make any adjustments while engine is  
TRAINING  
running, except where specifically recommended in the  
operators manual.  
8. Let engine and machine adjust to outdoor temperature  
before starting to clear snow.  
9. To avoid personal injury or property damage use extreme  
1. Read, understand, and follow all instructions on the  
machine and in the manual(s) before attempting to  
assemble and operate. Keep this manual in a safe place  
for future and regular reference and for ordering  
replacement parts.  
care in handling gasoline. Gasoline is extremely  
2. Be familiar with all controls and their proper operation.  
flammable and the vapors are explosive. Serious  
Know how to stop the machine and disengage them  
quickly.  
personal injury can occur when gasoline is spilled on  
yourself or your clothes, which can ignite. Wash your skin  
3. Never allow children under 14 years old to operate this  
and change clothes immediately.  
machine. Children 14 years old and over should read and  
a. Use only an approved gasoline container.  
understand the operation instructions and safety rules in  
b. Extinguish all cigarettes, cigars, pipes and other  
this manual and should be trained and supervised by a  
sources of ignition.  
parent.  
c. Never fuel machine indoors.  
4. Never allow adults to operate this machine without  
d. Never remove gas cap or add fuel while the  
proper instruction.  
engine is hot or running.  
5. Thrown objects can cause serious personal injury. Plan  
e. Allow engine to cool at least two minutes before  
your snow-throwing pattern to avoid discharge of material  
refueling.  
toward roads, bystanders and the like.  
6. Keep bystanders, helpers, pets and children at least 75  
feet from the machine while it is in operation. Stop  
machine if anyone enters the area.  
7. Exercise caution to avoid slipping or falling, especially  
f. Never over fill fuel tank. Fill tank to no more than  
½ inch below bottom of filler neck to provide space  
for fuel expansion.  
g. Replace gasoline cap and tighten securely.  
h. If gasoline is spilled, wipe it off the engine and  
when operating in reverse.  
equipment. Move machine to another area. Wait 5  
minutes before starting the engine.  
i. Never store the machine or fuel container inside  
PREPARATION  
where there is an open flame, spark or pilot light  
1. Thoroughly inspect the area where the equipment is to  
(e.g. furnace, water heater, space heater, clothes  
be used. Remove all doormats, newspapers, sleds,  
dryer etc.).  
boards, wires and other foreign objects, which could be  
j. Allow machine to cool at least 5 minutes before  
tripped over or thrown by the auger/impeller.  
storing.  
2. Always wear safety glasses or eye shields during  
operation and while performing an adjustment or repair to  
OPERATION  
protect your eyes. Thrown objects which ricochet can  
cause serious injury to the eyes.  
1. Do not put hands or feet near rotating parts, in the auger/  
3. Do not operate without wearing adequate winter outer  
impeller housing or discharge chute. Contact with the  
garments. Do not wear jewelry, long scarves or other  
rotating parts can amputate hands and feet.  
loose clothing, which could become entangled in moving  
2. The auger/impeller clutch lever is a safety device. Never  
parts. Wear footwear which will improve footing on  
bypass its operation. Doing so makes the machine  
slippery surfaces.  
4. Use a grounded three-wire extension cord and  
unsafe and may cause personal injury.  
3. The clutch levers must operate easily in both directions  
receptacle for all units with electric start engines.  
and automatically return to the disengaged position when  
5. Adjust collector housing height to clear gravel or crushed  
released.  
rock surfaces.  
6. Disengage all clutch levers before starting the engine.  
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4. Never operate with a missing or damaged discharge  
chute. Keep all safety devices in place and working.  
5. Never run an engine indoors or in a poorly ventilated  
area. Engine exhaust contains carbon monoxide, an  
odorless and deadly gas.  
6. Do not operate machine while under the influence of  
alcohol or drugs.  
7. Muffler and engine become hot and can cause a burn. Do  
not touch.  
Contact your dealer or telephone 1-800-800-7310 for  
assistance and the name of your nearest servicing  
dealer.  
MAINTENANCE AND STORAGE  
1. Never tamper with safety devices. Check their proper  
operation regularly. Refer to the maintenance and  
adjustment sections of this manual.  
2. Before cleaning, repairing or inspecting machine  
disengage all clutch levers and stop engine. Wait until the  
auger/impeller come to a complete stop. Disconnect the  
spark plug wire and ground against the engine to prevent  
unintended starting.  
3. Check bolts and screws for proper tightness at frequent  
intervals to keep the machine in safe working condition.  
Also, visually inspect machine for any damage.  
4. Do not change the engine governor setting or over-speed  
the engine. The governor controls the maximum safe  
operating speed of the engine.  
5. Snow thrower shave plates and skid shoes are subject to  
wear and damage. For your safety protection, frequently  
check all components and replace with original  
equipment manufacturers (OEM) parts only. Use of  
parts which do not meet the original equipment  
specifications may lead to improper performance and  
compromise safety!”  
6. Check clutch controls periodically to verify they engage  
and disengage properly and adjust, if necessary. Refer to  
the adjustment section in this operators manual for  
instructions.  
7. Maintain or replace safety and instruction labels, as  
necessary.  
8. Observe proper disposal laws and regulations for gas,  
oil, etc. to protect the environment.  
9. Prior to storing, run machine a few minutes to clear snow  
from machine and prevent freeze up of auger/impeller.  
10. Never store the machine or fuel container inside where  
there is an open flame, spark or pilot light such as a water  
heater, furnace, clothes dryer etc.  
8. Exercise extreme caution when operating on or crossing  
gravel surfaces. Stay alert for hidden hazards or traffic.  
9. Exercise caution when changing direction and while  
operating on slopes.  
10. Plan your snow-throwing pattern to avoid discharge  
towards windows, walls, cars etc. Thus, avoiding  
possible property damage or personal injury caused by a  
ricochet.  
11. Never direct discharge at children, bystanders and pets  
or allow anyone in front of the machine.  
12. Do not overload machine capacity by attempting to clear  
snow at too fast of a rate.  
13. Never operate this machine without good visibility or  
light. Always be sure of your footing and keep a firm hold  
on the handles. Walk, never run.  
14. Disengage power to the auger/impeller when  
transporting or not in use.  
15. Never operate machine at high transport speeds on  
slippery surfaces. Look down and behind and use care  
when in reverse.  
16. If the machine should start to vibrate abnormally, stop the  
engine, disconnect the spark plug wire and ground it  
against the engine. Inspect thoroughly for damage.  
Repair any damage before starting and operating.  
17. Disengage all clutch levers and stop engine before you  
leave the operating position (behind the handles). Wait  
until the auger/impeller comes to a complete stop before  
unclogging the discharge chute, making any  
adjustments, or inspections.  
18. Never put your hand in the discharge or collector  
openings. Always use the clean-out tool provided to  
unclog the discharge opening. Do not unclog discharge  
chute while engine is running. Shut off engine and remain  
behind handles until all moving parts have stopped  
before unclogging.  
11. Always refer to the operators manual for proper  
instructions on off-season storage.  
WARNING — YOUR RESPONSIBILITY:  
Restrict the use of this power machine to persons who  
read, understand and follow the warnings and  
instructions in this manual and on the machine. The  
safety labels are shown below for your reference.  
19. Use only attachments and accessories approved by the  
manufacturer (e.g. wheel weights, tire chains, cabs etc.).  
20. If situations occur which are not covered in this manual,  
use care and good judgment.  
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SECTION 2: ASSEMBLING YOUR SNOW THROWER  
Loose Parts  
Auger Shear Bolts (Spares)  
Cupped  
Washer  
Upper  
Handle  
Carriage  
Bolt  
Hex Lock Nuts  
5/16” Thread  
(712-0429)  
Wing  
Nuts  
Shear Bolts  
(710-0890A)  
NOTE: The augers are secured to the spiral shaft with  
two shear bolts and hex lock nuts. If you hit a hard  
foreign object or ice jam, the snow thrower is designed  
so that the bolts may shear. Two replacement shear  
bolts and nuts are provided for your convenience. Store  
in a safe place until needed.  
Lower  
Handle  
IMPORTANT: NEVER replace the auger shear bolts with  
standard hex bolts. Any damage to the auger gearbox  
or other components as a result of doing so will NOT be  
covered by your snow throwers warranty.  
Figure 1  
Upper  
WARNING: Disconnect spark plug wire  
and ground it against the engine to prevent  
unintended starting.  
Shift Rod  
Shift Rod  
Connector  
Hex Nut  
Lower  
Shift Rod  
Assembly  
NOTE: All references to right or left side of the snow  
thrower are determined from behind the unit in the  
operating position. The “operator’s position” is defined  
as standing directly behind the snow thrower, facing the  
handle panel.  
Eyebolt  
WARNING: Disconnect the spark plug  
wire and ground it against the engine to  
prevent unintended starting.  
Figure 2  
Retighten the wing nut to secure the chute  
directional control in this position. See Figure 2.  
Slide the shift rod connector down over the end of  
the lower shift rod. Tap the top of connector until it  
locks on the lower shift rod.  
Remove the lower two plastic wing nuts, cupped  
washers and carriage bolt (eyebolt on the left side)  
from the lower handle. See Figure 1.  
Raise the upper handle assembly until it aligns with  
lower handle.  
Be sure both cables are aligned with cable roller  
guides located in the lower rear of snow thrower  
frame.  
NOTE: If the connector is not properly assembled, the  
shift rod will pivot and you will not be able to shift gears  
or change directions.  
Secure the upper handle and lower handle with the  
plastic wing nuts, cupped washers, and carriage  
bolt (eyebolt on the left side) previously removed.  
Adjust the eyebolt on the chute directional control  
so the control rod does not come into contact with  
the engine by moving the hex nut against the  
handle (if necessary).  
Lamp Wiring  
Wrap the wire from the lamp down the right handle  
until the wire can be plugged into the alternator lead  
wire located under the fuel tank. See Figure 3.  
IMPORTANT:Lamp wire must not interfere with any  
controls or cables.  
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Gas and Oil  
After assembly, service engine with gasoline, and  
check oil level as instructed in the engine manual.  
Lower Handle  
Lamp Wire  
Alternator Lead  
NOTE: Refer to Auger Control Test on page 8 prior to  
operating your snow thrower. Read and follow all  
instructions carefully and perform all adjustments to  
verify your snow thrower is operating safely and  
properly.  
Figure 3  
SECTION 3: KNOW YOUR SNOW THROWER  
Chute Directional Control  
Operating Controls  
The chute directional control is located on left hand side  
of the snow thrower.To change the direction in which  
snow is thrown, rotate chute directional control as  
follows:  
WARNING: Be familiar with all controls and  
their proper operation. Know how to stop the  
machine and disengage them quickly.  
Clockwise to discharge to the left.  
Counterclockwise to discharge to the right.  
Shift Lever  
The shift lever is located in the center of the handle  
panel. The shift lever may be moved into one of eight  
positions. Run engine with throttle in the fast position.  
Use the shift lever to determine ground speed.  
Chute Clean-out Tool  
WARNING: Never use your hand to clear a  
clogged discharge chute. Shut off engine and  
remain behind handles until all moving parts  
have stopped before unclogging.  
Forward: There are six speeds. Position one (1) is the  
slowest. Position six (6) is the fastest.  
Reverse: There are two reverse (R) speeds R1 and R2.  
The R2closest to the operator (all the way back) is the  
faster of the two.  
The chute clean-out tool (see Figure 4) isdesigned to  
clear a clogged discharge chute. Refer to Operating Your  
Snow Thrower on page 9 for detailed instructions on how  
toproperly use the chute clean-out tool.  
Auger Control  
The auger control is located on the left handle. Squeeze  
the control to engage the augers; release to stop the  
augers. The traction control must also be released.  
Ignition Key  
The ignition key must be inserted in the switch in order  
for the engine to start. Remove the ignition key when  
the snow thrower is not in use.  
Traction / Auger Control Lock  
The traction control is located on the right handle.  
Squeeze the control to engage the wheel drive.  
Release to stop.  
NOTE: Do NOT turnthe ignition key in an attempt to  
start the engine.  
Throttle Control  
The throttle control is located on the engine. It regulates  
the speed of the engine. See Figure 4.  
This same control also locks the auger control so you  
can turn the chute directional control without  
interrupting the snow throwing process. If the auger  
control is engaged with the traction control engaged,  
the operator can release the auger control (on the left  
handle) and the augers will remain engaged. Release  
the traction control to stop both the augers and wheel  
drive (auger control must also be released).  
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Shift Lever  
Auger Control  
Traction/Auger  
Control Lock  
Discharge Chute  
Spark Plug  
Primer  
Choke  
Chute  
Clean-out Tool  
Recoil Starter  
Handle  
Chute Directional Control  
Ignition Key  
Throttle Control  
Auger  
Figure 4  
SECTION 4: OPERATING YOUR SNOW THROWER  
Attach spark plug wire to spark plug. Make certain  
the metal loop on end of the spark plug wire (inside  
the boot) is fastened securely over the metal tip on  
the spark plug. See Figure 5.  
Before Starting  
WARNING: Read, understand, and follow  
all instructions and warnings on the machine  
and in this manual before operating.  
Metal Loop  
The spark plug wire was disconnected for safety.  
Attach spark plug wire to spark plug before starting.  
Rubber Boot  
Figure 5  
Gas And Oil Fill-up  
Make certain the fuel shut-off valve, if so equipped,  
is in the OPEN (vertical) position.  
Make certain the auger and traction controls are in  
the disengaged (released) position.  
Move throttle control up to FAST position. Insert  
ignition key into slot. Be certain it snaps into place.  
Do not turn key. See Figure 4.  
At the factory, a plastic cup is inserted inside the  
fuel tanks fill opening (beneath the fuel cap) to  
prevent debris from entering the fuel tank during  
assembly. Remove and discard this cup before  
filling up the tank.  
WARNING: Use extreme care when  
handling gasoline. Gasoline is extremely  
flammable and the vapors are explosive.  
Never fuel machine indoor or while the  
engine is hot or running. Extinguish  
cigarettes, cigars, pipes and other sources of  
ignition.  
NOTE: Engine will not start unless ignition key is  
inserted into ignition slot in carburetor cover. Do not  
turn ignition key.  
Recoil Starter:  
Rotate choke knob to FULL choke position (cold  
engine start).  
If engine is warm, place choke in OFF position  
instead of FULL.  
Push primer button three or four times for cold  
engine start.  
If engine is warm, push primer button once only.  
Starting Engine  
IMPORTANT: Prior to operating your snow  
thrower, read, understand and follow ALL  
instructions to perform adjustments found  
under the heading Auger Control Test on  
page 8 of this manual.  
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NOTE: Always cover vent hole in primer button when  
pushing. Additional priming may be necessary for first  
start if temperature is below 15 degrees Fahrenheit.  
To prevent starter freeze-up:  
Run engine for a few minutes before stopping to  
help dry off any moisture on the engine.  
Electric Starter: Connect power cord to switch box  
on engine, then to 120 volt AC receptacle. With the  
engine running, push starter button and spin the  
starter for several seconds. The unusual sound  
made by spinning the starter will not harm engine or  
starter. Disconnect the power cord from receptacle  
first, and then from switch box.  
Recoil Starter: With engine running, pull starter  
rope with a rapid, continuous full arm stroke three  
or four times. Pulling the starter rope will produce a  
loud clattering sound, which is not harmful to the  
engine or starter.  
Wipe all snow and moisture from the carburetor  
cover in the area of the control levers. Also, move  
control levers back and forth several times. Leave  
throttle control lever in the STOP or OFF position.  
Leave choke control in the FULL choke position.  
Remove ignition key and disconnect spark plug  
wire. Do not turn key.  
Grasp starter handle and pull rope out slowly, until it  
pulls slightly harder. Let rope rewind slowly.  
Pull starter handle rapidly. Do not allow handle to  
snap back. Allow it to rewind slowly while keeping a  
firm hold on the starter handle.  
Repeat step above until engine starts.  
As engine warms up and begins to operate evenly,  
rotate choke knob slowly to OFF position. If engine  
falters, return to FULL choke, then slowly move to  
OFF position.  
Electric Starter  
The electric starter is equipped with a grounded three-  
wire power cord and plug, and is designed to operate  
on 120 volt AC household current.  
WARNING: The electric starter must be  
used with a properly grounded three-prong  
receptacle at all times to avoid possibility of  
electric shock. Follow all instructions carefully  
to operate the electric starter.  
IMPORTANT: Do not lose the ignition key. Keep it in a  
safe place. Engine will not start without the ignition key.  
Determine that your house wiring is a three-wire  
grounded system. Ask a licensed electrician if you  
are not certain.  
If your home wiring system is not a three-wire  
grounded system, do not use this electric starter  
under any conditions.  
If your home electrical system is grounded, but  
a three-hole receptacle is not available, one should  
be installed by a licensed electrician before using  
the electric starter.  
If you have a grounded three-prong receptacle,  
proceed as follows.  
Rotate choke knob to OFF position.  
Connect power cord to switch box on engine. Plug  
the other end of power cord into a three-prong 120-  
volt, grounded, AC receptacle.  
Push starter button to crank engine. As you crank  
the engine, move choke knob to FULL choke  
position.  
When engine starts, release starter button, and  
move choke gradually to OFF. If engine falters,  
move choke immediately to FULL and then  
gradually to OFF.  
When disconnecting the power cord, always unplug  
from the three-prong receptacle first, and then from  
the snow thrower.  
To Engage Drive  
With the engine running near top speed, move shift  
lever into one of the five FORWARD positions or  
two REVERSE positions. Select a speed  
appropriate for the snow conditions that exist. Use  
the slower speeds until you are familiar with the  
operation of the snow thrower.  
Squeeze the auger control and the augers will turn.  
Release it and the augers will stop.  
Squeeze traction control and the snow thrower will  
move. Release it and unit will stop. Never move  
shift lever without releasing traction control.  
To Engage Augers  
To engage augers and start throwing snow,  
squeeze the auger control against the left handle.  
Release to stop the augers.  
Auger Control Test  
IMPORTANT: Perform the following test before operating  
the snow thrower for the first time and at the start of  
each winter season.  
Check the adjustment of the auger control as follows:  
When the auger control is released and in the  
disengaged upposition, the cable should have  
very little slack, but should NOT be tight.  
To Stop Engine  
To stop engine, remove the ignition key. Do not turn  
key. Disconnect the spark plug wire from the spark  
plug to prevent accidental starting while equipment  
is unattended.  
WARNING: Do not over-tighten the cable.  
Over-tightening may prevent the auger from  
disengaging and compromise the safety of the  
snow thrower.  
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2. Stop the engine by removing the ignition key.  
3. Remove the clean-out tool from the clip which  
secures it to the rear of the auger housing.  
4. Use the shovel-shaped end of the clean-out tool to  
remove any snow and ice in the discharge chute.  
WARNING: Never use your hand to clear a  
clogged discharge chute. Shut off engine and  
remain behind handles until all moving parts  
have stopped before unclogging.  
"Z" Fitting  
5. Refasten the clean-out tool to the mounting clip on  
the rear of the auger housing, re-start the engine.  
6. While standing in the operators position (behind  
the snow thrower), engage the auger clutch lever  
for a few seconds to clear any remaining snow or  
ice from the discharge chute before continuing to  
clear snow.  
Jam Nut  
Make sure cable is straight  
Figure 6  
In a well-ventilated area, start the snow thrower  
engine as instructed earlier in this section under the  
heading Starting Engine. Make sure the throttle is set  
in the FAST position.  
While standing in the operators position (behind  
the snow thrower) engage the auger.  
Tire Chains (Optional Equipment)  
Tire chains may be used whenever extra traction is  
needed. Contact Customer Support as instructed on  
page 2 for information regarding price and availability.  
Snow Thrower Model  
Tire Chain Kit  
Allow the auger to remain engaged for  
31AE640F352  
OEM-390-991  
approximately ten (10) seconds before releasing  
the auger control. Repeat this several times.  
With the engine running in the FAST position and  
the auger control lever in the disengaged up”  
position, walk to the front of the machine.  
Confirm that the auger has completely stopped  
rotating and shows NO signs of motion.  
Drift Cutters (Optional Equipment)  
Drift cutters should be used when operating the snow  
thrower in heavy drift conditions. Contact Customer  
Support as instructed on page 2 for information  
regarding price and availability.  
Snow Thrower Model  
Drift Cutter Kit  
IMPORTANT: If the auger shows ANY signs of rotating,  
immediately return to the operators position and shut  
off the engine. Wait for all moving parts to stop before  
readjusting the auger control cable.  
31AE640F352  
OEM-390-679  
Operating Tips  
NOTE: Allow the engine to warm up for a few minutes  
as the engine will not develop full power until it reaches  
operating temperature.  
To readjust the control cable, loosen the hex jam  
nut on the auger control cable Zfitting.  
Rotate the coupling end of the cable  
counterclockwise to provide more slack.  
Retighten the hex jam nut. See Figure 6.  
Repeat Auger Control Test to verify proper  
adjustment has been achieved.  
WARNING: The muffler, engine and their  
surrounding areas become hot and can cause  
a burn. Do not touch.  
Discharge snow downwind whenever possible.  
Slightly overlap each previous path.  
Set the skid shoes 1/4" below the scraper bar for  
normal usage. The skid shoes may be adjusted  
upward for hard-packed snow. Adjust downward  
when using on gravel or crushed rock.  
Chute Clean-out Tool  
The chute clean-out tool is conveniently fastened to the  
rear of the auger housing with a mounting clip (Refer to  
Figure 4). If the discharge chute becomes clogged  
during operation, proceed as follows to safely clean the  
chute and chute opening:  
Avoid possible starter freeze-up. Clean the snow  
thrower thoroughly after each use.  
1. Release both the Auger Control Lever and the  
Traction/Auger Control Lock Lever.  
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SECTION 5: MAKING ADJUSTMENTS  
WARNING: NEVER attempt to make any  
adjustments while the engine is running,  
except where specified in the operators  
manual.  
WARNING: Drain the gasoline out of snow  
thrower engine, place a piece of plastic film  
under the gas cap to avoid spillage before  
beginning the job.  
To test further for correct adjustment, if necessary,  
proceed as follows:  
Auger Control  
Refer to Auger Control Test on page 8 to adjust the auger  
Tip the snow thrower forward, allowing it to rest on  
the auger housing.  
control.  
Remove the frame cover underneath the snow  
thrower by removing six self-tapping screws.  
With the traction control released, there must be  
clearance between the friction wheel and the drive  
plate in all positions of the shift lever.  
Chute Assembly  
The distance snow is thrown can be adjusted by  
changing the angle of the chute assembly. To do so,  
stop the engine by removing the ignition key and loosen  
the plastic wing knobs found on either side of the  
discharge chute. Pivot the chute upward or downward  
before re-tightening the wing knobs.  
With traction control engaged, the friction wheel  
must contact the drive plate. See Figure 7.  
Friction  
Wheel  
Tire Pressure  
The tires are over-inflated for shipping purposes.  
Before operating, check tire pressure and reduce, if  
necessary, to between 15 psi and 20 psi.  
Gear Shaft  
NOTE: If the tire pressure is not equal in both tires, the  
unit may pull to one side or the other.  
Traction Control and Shift Lever  
Drive  
Plate  
To check the adjustment of the traction control and  
shift lever, proceed as follows:  
With the engine off, move the shift lever all the way  
forward to sixth (6) position. With the traction  
control released, push the snow thrower forward.  
The unit should move forward freely. Then engage  
the traction control grip. Wheels should stop  
turning.  
Figure 7  
If adjustment is necessary:  
Loosen the jam nut on the traction drive cable and  
thread the cable in or out as necessary.  
Retighten the jam nut to secure the cable when  
correct adjustment is reached.  
Now release the traction control grip, and push the  
unit again.  
Move the shift lever back to the fast reverse  
position, then all the way forward again. There  
should be no resistance in the shift lever, and  
wheels should keep turning.  
Reassemble the frame cover.  
NOTE: If you placed plastic film under the gas cap, be  
certain to remove it before operating the snow thrower.  
If you feel resistance when moving the shift lever or  
the wheels stop when they should not, loosen the  
jam nut on the traction control cable and unthread  
the cable one turn.  
If the wheels do not stop when you engage the  
traction control grip, loosen the jam nut on the  
traction control cable and thread the cable in one  
turn. Recheck the adjustment and repeat as  
necessary. Tighten the jam nut to secure the cable  
when correct adjustment is reached.  
Shift Rod  
To adjust the shift rod, proceed as follows.  
Remove the hairpin clip and flat washer from the  
shift handle under the handle panel.  
Place shift lever in sixth (6) position or the fastest  
forward speed.  
Push shift arm assembly down as far as it will go  
Rotate the ferrule up or down on the shift rod as  
necessary until the ferrule lines up with the upper  
hole in the shift lever. See Figure 8.  
10  
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Shift  
Lever  
Ferrule  
Upper  
Shift Rod  
Carriage Bolts  
Hex Nuts  
Shift Rod  
Connector  
Skid Shoe  
Hairpin  
Clip  
Lower  
Shift Rod  
Figure 9  
Shift Arm  
Assembly  
Inside Hole  
in Axle  
Figure 8  
Insert ferrule into the upper hole in shift lever.  
Reinstall the hairpin clip and the washer.  
IMPORTANT: Check for correct adjustment of the shift  
lever as instructed on page 10, before operating the  
snow thrower.  
Click Pin  
in Outside Hole  
Skid Shoes  
Figure 10  
The space between the shave plate and the ground can  
be adjusted. For close snow removal, place skid shoes  
in the low position. Use middle or high position when  
area to be cleared is uneven.  
One Wheel Driving: Insert the click pin only  
through the outside hole of the axle (not the rim) on  
the right side of the snow thrower. This position  
gives power drive to the left wheel only, making the  
unit easier to maneuver.  
Both Wheels Driving: Insert the click pin through  
the hole in the hub of the rim and the inside hole on  
the snow throwers right axle. This position is good  
for heavy snow as there is power drive in both  
wheels.  
Adjust skid shoes by loosening the four hex nuts  
and carriage bolts and moving skid shoes to  
desired position. See WARNING:.  
Make certain the entire bottom surface of skid shoe  
is against the ground to avoid uneven wear on the  
skid shoes. Retighten nuts and bolts securely.  
WARNING: Do not operate this snow  
thrower on gravel as loose gravel can be  
easily picked up and thrown by the auger  
causing injury to the operator and/or damage  
to the snow thrower.  
IMPORTANT: Never operate the snow thrower with the  
click pin inserted through both the rim and the outside  
hole in the axle. Doing so can result in serious damage  
to the drive system.  
Drive Wheels  
The wheels may be adjusted for two different methods  
of operation. The adjustment is made by placing the  
click pins in one of two different holes on the right side  
of the unit. See Figure 10.  
11  
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SECTION 6: MAINTAINING YOUR SNOW THROWER  
WARNING: Before servicing, repairing or  
inspecting, disengage all clutch levers and  
stop engine. Wait until all moving parts have  
come to a complete stop. Disconnect spark  
plug wire and ground it against the engine to  
prevent unintended starting.  
Shear Bolts  
Lubrication  
Engine  
Refer to the engine manual for maintenance  
procedures and instructions.  
WARNING: When following instructions in  
the engine manual for draining oil, be sure to  
protect frame to avoid oil dripping onto  
transmission parts.  
Bearings  
Bearings  
Figure 11  
Gear Shaft  
Lubricate the gear shaft with a good all-weather  
multi-purpose light grease at least once a season or  
after every 25 hours of operation.  
Klick Pin  
Gear Case  
The auger gearbox has been filled with grease at  
the factory. If disassembled for repairs, lubricate  
with 1-1/2 ounces of grease (part no. 737-0168).  
IMPORTANT: Do not overfill the gear case. Damage to  
the seals could result. Be sure the vent plug is free of  
grease in order to relieve pressure.  
Axle  
Auger Shaft  
At least once a season, remove shear bolts on  
auger shaft. Oil or spray lubricant inside shaft. Also  
lubricate the auger bearings at least once a season.  
See Figure 11.  
Figure 12  
Drive and Shifting Mechanism  
Remove rear cover. Oil any chains, sprockets,  
gears, bearings, shafts, and shifting mechanism at  
least once a season. Use engine oil or a spray  
lubricant. Avoid getting oil on rubber friction wheel  
and aluminum drive plate.  
Chute Directional Control  
The worm gear on the chute directional control  
should be greased with multipurpose automotive  
grease.  
IMPORTANT: Keep all grease and oil off friction wheel  
and drive plate.  
Wheels  
Oil or spray lubricant into bearings at least once a  
season. Pull the klick pins and remove wheels,  
clean and coat axles with a multipurpose  
automotive grease. See Figure 12.  
12  
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SECTION 7: SERVICE  
Tip the snow thrower up and forward so that it rests  
on the housing.  
Remove six self-tapping screws from the frame  
cover underneath the snow thrower. See Figure 13  
for the location of the hardware.  
WARNING: Before servicing, repairing, or  
inspecting, disengage all clutch levers and  
stop engine. Wait until all moving parts have  
come to a complete stop. Disconnect spark  
plug wire and ground it against the engine to  
prevent unintended starting.  
Belt  
Cover  
Augers  
The augers are secured to the spiral shaft with two  
shear bolts and hex lock nuts. If the snow thrower hits a  
foreign object or ice jam, hex bolts will shear.  
Self-Tapping  
Screws  
If the augers will not turn, check to see if the bolts  
have sheared. Two replacement shear bolts and  
hex lock nuts have been provided in the snow  
throwers hardware pack. For future use, order part  
number 710-0890A (shear bolt 5/16-18 x 1.5") and  
712-0429 (hex lock nut 5/16-18).  
Shave Plate and Skid Shoes  
Figure 13  
The shave plate and skid shoes on the bottom of the  
snow thrower are subject to wear. They should be  
checked periodically and replaced when necessary.  
Roll the front and rear auger belts off the engine  
pulley. See Figure 14.  
To remove skid shoes, remove the four carriage  
bolts, bell washers and hex nuts which attach them  
to the snow thrower. Reassemble new skid shoes  
with the four carriage bolts, bell washers (cupped  
side goes against skid shoes) and hex nuts. Make  
certain the skid shoes are adjusted to be level.  
To remove shave plate, remove carriage bolts, bell  
washers and hex nuts which attach it to the snow  
thrower housing.  
Drive  
Belt  
Rear Auger  
Belt  
Engine  
Pulley  
Front Auger  
Belt  
Idler  
Pulley  
Reassemble new shave plate, making sure heads  
of the carriage bolts are to the inside of the housing.  
Tighten securely.  
Idler  
Engine  
Pulley  
Pulley  
Belt Replacement  
Figure 14  
WARNING: Disconnect the spark plug wire  
from the spark plug and ground.  
Unhook the idler spring from the hex bolt on the  
auger housing. See Figure 15.  
Back out the stop bolt to allow the belts to slip  
between the bolt and auger pulley. See Figure 16.  
Auger Belts  
NOTE: It may be necessary to loosen the six hex nuts  
that fasten the frame to the auger housing.  
NOTE: It is necessary to remove both auger belts in  
order to change either one. If changing just one belt, be  
certain to check the condition of the other belt.  
Lift the rear auger belt from the auger pulley, and  
slip belt between the support bracket and the auger  
pulley. See Figure 15. Repeat this step for front  
auger belt .  
Remove the plastic belt cover on the front of the  
engine by removing the two self-tapping screws.  
See Figure 13.  
Replace both auger drive belts by following  
instructions in reverse order.  
Drain the gasoline from the snow thrower, or place  
a piece of plastic under the gas cap.  
13  
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Drain the gasoline from the snow thrower, or place  
a piece of plastic under the gas cap.  
Tip the snow thrower up and forward, so that it rests  
on the housing. See Figure 17.  
Friction  
Wheel  
Support  
Bracket  
Hex Nut and  
Bell Washer  
Chute  
Rear Auger  
Belt  
Frame  
Note: The unit is  
shown resting on  
its auger housing  
Auger  
Front Auger  
Pulley  
Support  
Bracket  
Spring  
Auger  
Pulley  
Figure 17  
Auger  
Idler  
Spring  
Housing  
Remove the six self-tapping screws from the frame  
cover underneath the snow thrower.  
Remove the klick pins which secure the wheels,  
and remove the wheels from the axle.  
Using a wrench to hold the shaft, loosen, but do not  
completely remove, the hex nut and bell washer on  
left end of gear shaft. See Figure 17.  
Figure 15  
Drive Belt  
Follow steps 1 through 4 of previous instructions.  
Pull idler pulley up, and lift belt off engine pulley and  
friction wheel disc. See Figure 14.  
Lightly tap the hex nut to dislodge the ball bearing  
from the right side of frame. Remove the hex nut  
and bell washer from left end of shaft.  
Slide the gear shaft to the right and slide the friction  
wheel assembly from the shaft.  
Remove the four screws from the friction wheel  
assembly. Remove the friction wheel rubber from  
between the plates. See Figure 18.  
Back out the stop bolt until the support bracket rests  
on the auger pulley. See Figure 16.  
Slip belt between friction wheel and friction wheel  
disc. Remove and replace belt. Reassemble  
following the instructions in reverse order.  
NOTE: The support bracket must rest on the stop bolt  
after the new belt has been assembled. See Figure 25.  
Friction  
Wheel  
Disc  
Friction Wheel  
Plates  
Drive Belt  
Bearing  
Stop  
Bolt  
Screws  
Hub  
Friction Wheel Rubber  
Figure 18  
Support Bracket  
Reassemble new friction wheel rubber to the  
friction wheel assembly, tightening the four screws  
in rotation and with equal force.  
Position the friction wheel assembly up onto the pin  
of the shift rod assembly, and slide the shaft  
through the assembly. Reassemble the wheels and  
the frame cover.  
Figure 16  
Changing Friction Wheel Rubber  
The rubber on the friction wheel is subject to wear and  
should be checked after 25 hours of operation, and  
periodically thereafter. Replace the friction wheel  
rubber if any signs of wear or cracking are found.  
14  
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SECTION 8: OFF-SEASON STORAGE  
Remove all dirt from exterior of engine and  
equipment.  
Follow lubrication recommendations on page 12.  
WARNING: Never store engine with fuel in  
tank indoors or in enclosed, poorly ventilated  
areas where fuel fumes may reach an open  
flame, spark or pilot light as on a furnace,  
water heater, clothes dryer, or other gas  
appliance.  
NOTE: When storing any type of power equipment in  
an poorly ventilated or metal storage shed, care should  
be taken to rustproof the equipment, especially springs,  
cables and all moving parts.  
If unit is to be stored over 30 days, prepare the  
engine for storage following instructions in the  
engine manual.  
SECTION 9: TROUBLE SHOOTING GUIDE  
Trouble  
Possible Cause(s)  
Corrective Action  
Engine fails to start Fuel tank empty, or stale fuel.  
Fill tank with clean, fresh gasoline. Fuel may not last over thirty days  
unless a fuel stabilizer is used.  
Clean fuel line.  
Move switch to ON position  
Clean, adjust gap or replace.  
Insert key.  
Blocked fuel line.  
Choke not in ON position  
Faulty spark plug.  
Key not in switch on engine.  
Spark plug wire  
Connect spark plug wire.  
disconnected.  
Primer button not depressed.  
Fuel shut-off valve closed  
(if so equipped).  
Refer to the engine manual packed with your unit.  
Open fuel shut-off valve.  
Engine runs erratic Unit running on CHOKE.  
Blocked fuel line or stale fuel.  
Move choke lever to OFF position.  
Clean fuel line; fill tank with clean fresh gasoline. Fuel may not last  
over thirty days unless a fuel stabilizer is used.  
Drain fuel tank. Refill with fresh fuel.  
Refer to the engine manual packed with your unit or have carburetor  
adjusted by an authorized service dealer.  
Water or dirt in fuel system.  
Carburetor out of adjustment.  
Loss of power  
Spark plug wire loose.  
Gas cap vent hole plugged.  
Exhaust port plugged.  
Carburetor not adjusted  
properly.  
Connect and tighten spark plug wire.  
Remove ice and snow from cap. Be certain vent hole is clear.  
Clean-see Maintenance section of engine manual.  
Refer to the engine manual packed with your unit or have carburetor  
adjusted by an authorized service dealer.  
Engine overheats  
Incorrect fuel mixture.  
Drain fuel tank. Refill with proper fuel mixture.  
Excessive vibration Loose parts or damaged auger. Stop engine immediately and disconnect spark plug wire. Tighten all  
bolts and nuts. Make all necessary repairs. If vibration continues, have  
unit serviced by an authorized service dealer.  
Unit fails to propel  
itself  
Incorrect adjustment of drive  
cable.  
Adjust drive cable. Refer to Adjustment section of this manual.  
Drive belt loose or damaged.  
Discharge chute clogged.  
Replace drive belt. Refer to Belt Replacement on page 13.  
Stop engine immediately and disconnect spark plug wire. Clean dis-  
charge chute and inside of auger housing.  
Unit fails to  
discharge snow  
Foreign object lodged in auger. Stop engine immediately and disconnect spark plug wire. Remove  
Incorrect adjustment of drive  
cable.  
object from auger.  
Adjust drive cable. Refer to Adjustment section of this manual.  
Drive belt loose or damaged.  
Shear bolt(s) sheared  
Replace drive belt. Refer to Belt Replacement on page 13.  
Replace shear bolt(s)  
NOTE: For repairs beyond the minor adjustments listed above, contact your nearest authorized service dealer or  
call 1-800-800-7310 for the Customer Support Center. Refer to separate engine manual packed with your snow  
thrower for more engine related information.  
15  
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SECTION 10: MODEL 31AE640F352 PARTS LIST  
18  
1
20  
3
2
15  
4
6
16  
3
63  
3
7
9
5
14  
17  
21  
8
2
33  
1
13  
18  
29  
32  
10  
11  
1
12  
19  
30  
35  
23  
20  
26  
54  
22  
27  
17  
28  
25  
61  
62  
26  
24  
39  
37  
34  
31  
38  
57  
44  
51  
36  
41  
48  
49  
52  
53  
45  
54  
42  
57  
26  
43  
27  
47  
40  
54  
55  
59  
50  
56  
58  
26  
60  
16  
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Model 31AE640F352  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
DESCRIPTION  
Handle Panel (for top-mount lamp)  
Saddle Washer  
Bell Washer .340 ID x .872 OD  
Lower Shift Rod  
714-0507  
747-0877  
710-0599  
784-5680  
784-5679  
748-0362  
748-0363  
732-0145  
711-0653  
Cotter Pin  
Rod  
33 731-1393  
34 736-0451  
35 736-0242  
36 747-0621  
37 726-0100  
38 720-0201A  
39 749-0953A  
749-0952A  
Hex Washer Screw 1/4-20 x .5  
Handle Support Bracket RH  
Handle Support Bracket LH  
Cam Lock Handle  
Handle Lock Pawl  
Compression Spring  
Clevis Pin  
Push Cap  
Chute Knob  
Upper Handle LH  
Upper Handle RH  
Chute Crank  
Chute Crank Eyebolt  
Rubber Grommet  
Shift Arm Assembly  
Hex Washer Screw 1/4-20 x 1.0  
Handle Tab  
Lock Washer 5/16  
Hex Cap Screw 5/16-18 x 1  
Hex Cap Screw 5/16-18 x .75  
Flat Washer  
8
9
40 705-5204A  
42 747-0697  
43 735-0234  
44 684-0008A  
45 710-0788  
46 784-5599  
47 736-0119  
48 710-0643  
49 710-1880  
50 736-0185  
51 731-0921  
52 731-1300B  
53 712-3068  
54 736-0159  
55 710-0451  
56 710-04071  
57 720-0284  
58 712-3027  
59 731-0851A  
60 710-3015  
61 747-0620A  
62 750-0963  
63 625-0007  
10 720-0232  
11 684-0037B  
12 784-5681  
13 784-5619A  
14 784-5682  
15 732-0746  
16 684-0036A  
17 735-0199A  
18 736-0509  
19 712-0271  
20 712-3010  
21 746-0778  
22 684-0103  
23 712-3068  
24 710-0449  
25 712-0429  
26 714-0104  
27 736-0275  
28 711-0677  
29 710-0458  
30 720-0274  
31 749-0951  
32 710-1003  
Knob  
Engagement Handle Assy LH  
Handle Support Bracket LH  
Shift Handle  
Handle Support Bracket RH  
Torsion Spring  
Engagement Handle Assy RH  
Rubber Bumper  
Washer  
Hex Nut 1/4-20 †  
Hex Nut 5/16-18  
Cable  
Panel  
Hex Lock Nut, 5/16-18  
Carriage Screw 5/16-18 x 2.25  
Hex Lock Nut, 5/16-18  
Cotter Pin  
Flat Washer 5/16  
Ferrule  
Carriage Screw 5/16-18 x 1.75  
Grip  
Lower Handle  
Upper Chute  
Lower Chute  
Hex Lock Nut 5/16-18  
5/16 Washer  
Carriage Bolt 5/16-18 x .75  
Carriage Screw 5/16-18 x 1.0  
Knob  
Hex Lock Nut 1/4-20  
Flange Keeper  
Hex Cap Screw 1/4-20 x .75  
Upper Shift Rod  
Rod Connector  
Halogen Light Assembly  
Hex Washer Screw  
Used with lamp ground wire  
17  
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Model 31AE640F352  
27  
20  
39  
38  
Drive Clutch Cable  
Auger Clutch Cable  
5
37  
4
13  
30  
7
6
40  
45  
3
4
30  
5
2
14  
36  
26  
15  
16  
25  
44  
9
7
10  
11*  
25  
31  
12  
28  
23  
41  
17  
8
18  
4
24  
22  
32  
33  
1
1
21  
20  
42  
29  
5
8
34  
Auger Clutch Cable  
19  
43  
35  
1
1
18  
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Model 31AE640F352  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
Self-tapping Screw, 1/4-20 x .625  
Drive Cable Guide Bracket  
Auger Clutch Cable Bracket  
Cable Roller  
Hex Screw 1/4-28  
Frame Assembly  
Ball Bearing  
Bell Washer  
Lock Jam Nut  
Hex Flange Bearing  
Flat Washer†  
Front Support Guide Bracket  
Lock Hex Screw  
Bell Washer .340 ID x .872 OD  
Cotter Pin  
Flat Washer .536 ID x .930 OD  
Self-tapping Screw, 1/4-20 x 1.25  
Frame Shift Bracket  
Frame Cover  
Hex Washer TT Screw 1/4-20  
Flat Washer .760 ID x .50 OD  
Gear  
DESCRIPTION  
7-Tooth Shaft  
Roll Pin  
Klik Pin  
Friction Wheel Assembly  
Friction Disc Wheel  
Wheel Shift Rod Assembly  
Self-tapping Screw, 1/4-20 x .5  
Spacer  
Friction Wheel Bracket Assembly  
Extension Spring  
Jam Nut 3/8-24  
Drive Cable  
Axle 16Wheels  
Friction Plate  
Friction Wheel Rubber  
Friction Wheel Hub  
Friction Wheel Bearing  
Clevis Pin, 1/4 x 1.3725  
Flat Washer, .281 x .5 x .063  
Cotter Pin, .75  
710-1652  
784-5688  
784-5687A  
756-0625  
738-0924  
784-5630B  
741-0563  
736-0105  
712-0116  
24 717-1444  
25 715-0249  
26 714-0143  
27 684-0042B  
28 656-0012A  
29 684-0013B  
30 710-0599  
31 748-0190  
32 684-0021  
33 732-0264  
34 712-0711  
35 746-0898B  
36 738-0830  
37 790-00010  
38 735-0243B  
39 718-0301A  
40 618-0063A  
41 711-1364  
42 736-0142  
43 714-0507  
44 712-0703A  
45 790-00011  
8
9
10 741-04026  
11 736-0188  
12 784-5689A  
13 710-0538  
14 736-0242  
15 714-0474  
16 736-0160  
17 710-0809  
18 784-5590  
19 784-5638  
20 710-1652  
21 736-0351  
22 717-1445  
23 714-0126  
Insert Nut, 5/16-18  
Friction Plate (Exterior)  
Key  
Use more than one washer on either side, only if necessary to reduce axle-play.  
2
1
WHEEL CHART  
MODEL  
NUMBER  
31AE640F352  
WHEEL  
SIZE  
16 x 4.8  
REF. NO. 1  
SPACER  
731-04043  
REF. NO. 2  
WHEEL ASSY*  
734-1709A  
TIRE  
ONLY  
734-1530  
AIR  
VALVE  
734-0255  
RIM  
ONLY  
734-1708A  
SLEEVE  
BEARING (2)  
741-0401  
* Wheel assembly includes one tire, one air valve, one painted rim and two sleeve bearings  
19  
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Model 31AE640F352  
2
3
4
9
1
44  
11  
10  
43  
14  
12  
5
9
6
24  
8
7
18  
19  
20  
22  
9
15  
23  
10  
21  
27  
13  
13  
38  
25  
28  
23  
18  
13  
26  
30  
35  
41  
22  
36  
18  
9
33  
18  
9
37  
40  
34  
40  
39  
16  
39  
42  
20  
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Model 31AE640F352  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
Lock Jam Nut 3/8-24  
1
712-0116  
2
3
4
5
6
7
8
9
756-0178  
784-5632B  
710-0459A  
738-0281  
736-0167  
732-0611  
712-3068  
712-3010  
Flat Idler  
Auger Idler Arm  
Hex Cap Screw 3/8-24 x 1.50  
Shoulder Screw  
Flat Washer, .565 x 1.25 x .02  
Extension Spring  
Hex Nut 5/16-18  
Hex Nut 5/16-18  
Lock Washer 5/16  
Housing  
10 736-0119  
11 05931A  
12 741-0309  
13 710-0451  
14 705-5226  
15 684-0040D  
16 784-5618  
18 736-0242  
19 741-0475  
20 784-5647  
21 731-1379C  
22 712-0324  
23 736-0463  
24 731-2635  
25 710-0703  
26 710-0604A  
27 736-0169  
28 712-0798  
30 784-5580  
31 731-2643  
32 731-2635  
33 784-5579A  
34 741-0245  
35 684-0065  
36 715-0114  
37 712-0429  
38 605-5192A  
39 736-0188  
40 741-0493A  
41 605-5193A  
42 710-0890A  
43 746-0897  
44 731-2643  
Ball Bearing  
Carriage Bolt 5/16-18 x .75  
Reinforcement Chute  
26Housing Assembly  
Bearing Housing  
Bell Washer  
Bushing  
Chute Crank Bracket  
Chute Adapter  
Hex Lock Nut 1/4-20  
Flat Washer  
Mount, Chute Clean-out Tool  
Carriage Screw 1/4-20 x .75  
Hex Washer TT Screw 5/16-18  
Lock Washer 3/8  
Hex Nut 3/8-16  
Snow Shoe  
Chute Clean-out Tool  
Mount, Chute Clean-out Tool  
26Shave Plate  
Hex Flange Bearing  
Impeller Assembly  
Pin  
Lock Nut 5/16-18  
Spiral 26RH  
Flat Washer  
Flange Bushing  
Spiral 26LH  
Shear Bolt 5/16-18 x 1.5  
Drive Cable  
Chute Clean-out Tool  
21  
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Model 31AE640F352  
4
17  
11  
9
16  
13  
8
15  
2
10  
14  
5
6
3
7
12  
3
1
REF.  
NO.  
1
PART  
NO.  
618-0123  
DESCRIPTION  
RH Reducer Housing  
LH Reducer Housing  
Hex Screw 1/4-20 x .75  
Spiral Axle 26"  
Key  
Pin-Spiral  
Worm Gear, 20T  
Worm Shaft  
Thrust Collar  
Grease Plug  
Grease Seal  
Flat Washer .76 x 1.5 x .030  
Flat Washer .508 x 1.0 x .020  
Flat Washer .76 x 1.5 x .060  
Flange Bearing .75 x 1.0 x .59  
Flange Bearing .75 x 1.0 x .925  
Gearbox Assy. Complete 26"  
2
3
4
5
6
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
618-0124  
710-0642  
711-0909A  
714-0161  
715-0143  
717-0528  
717-0526  
718-0186  
721-0325  
721-0327  
736-0351  
736-0369  
736-0445  
741-0662  
741-0663  
618-0121A  
NOTE: NOTE: When rebuilding a gearbox assembly, include 1.5 oz. of Alvania EP Lead-Free Grease (Part No. 737-0168)  
22  
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Model 31AE640F352  
1
IMPORTANT: For a proper working machine, use Factory Approved Parts.  
V-BELTS are specially designed to engage and disengage safely. A substitute  
(non OEM) V-Belt can be dangerous by not disengaging completely.  
2
3
5
4
8
26  
9
10  
11  
12  
15  
16  
19  
16  
7
16  
4
19  
6
16  
21  
22  
13  
14  
17  
18  
25  
23  
20  
20  
24  
REF.  
NO.  
1
2
3
4
5
6
7
PART  
NO.  
REF.  
NO.  
PART  
NO.  
DESCRIPTION  
Hex Washer Screw 1/4-20 x .625  
Belt Cover  
Extension Spring  
Hex Screw 5/16-24 x .75  
Hex Cap Screw 3/8-16 x 1.25  
Drive Clutch Idler Bracket  
Shoulder Spacer  
Pulley Half  
DESCRIPTION  
Lock Hex Cap Screw 5/16-24  
Lock Jam Nut 3/8-16  
Pulley Half  
Bell Washer  
Flat Washer  
Belt  
Auger Pulley  
Flat Washer 3/8 x 1.25 OD  
Bell Washer  
Hex Cap Screw 3/8-24  
Pulley Adapter  
710-1652  
731-1324  
732-0710  
710-0627  
710-3005  
05896A  
748-0234  
756-0987  
754-0346  
14 710-1245A  
15 712-0181  
16 756-0569  
17 736-0242  
18 736-0505  
19 754-0430A  
20 756-0967  
21 736-0247  
22 736-0331  
23 710-0696  
24 748-0360  
25 710-0654A  
26 629-0071  
8
9
V-Belt  
Pulley Half  
10 756-0986  
11 736-0270  
12 710-0230  
13 756-0313  
Bell Washer  
Hex Cap Screw 1/4-28 x .50  
Flat Idler  
Hex Screw 3/8-16 x 1.0  
Extension Cord, Three-Prong  
23  
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MANUFACTURERS LIMITED WARRANTY FOR:  
The limited warranty set forth below is given by MTD LLC with  
respect to new merchandise purchased and used in the  
United States, its possessions and territories.  
d. MTD LLC does not extend any warranty for products  
sold or exported outside of the United States, its posses-  
sions and territories, except those sold through MTD  
LLCs authorized channels of export distribution.  
e. Parts that are not genuine MTD parts are not covered by  
this warranty.  
MTD LLC warrants this product against defects for a period of  
two (2) years commencing on the date of original purchase  
and will, at its option, repair or replace, free of charge, any  
part found to be defective in materials or workmanship. This  
limited warranty shall only apply if this product has been oper-  
ated and maintained in accordance with the Operators Man-  
ual furnished with the product, and has not been subject to  
misuse, abuse, commercial use, neglect, accident, improper  
maintenance, alteration, vandalism, theft, fire, water, or dam-  
age because of other peril or natural disaster. Damage result-  
ing from the installation or use of any accessory or  
f.  
Service completed by someone other than an authorized  
service dealer is not covered by this warranty.  
g. Transportation charges and service calls are not  
covered.  
No implied warranty, including any implied warranty of  
merchantability of fitness for a particular purpose,  
applies after the applicable period of express written  
warranty above as to the parts as identified. No other  
express warranty, whether written or oral, except as men-  
tioned above, given by any person or entity, including a  
dealer or retailer, with respect to any product, shall bind  
MTD LLC. During the period of the warranty, the exclu-  
sive remedy is repair or replacement of the product as  
set forth above.  
attachment not approved by MTD LLC for use with the prod-  
uct(s) covered by this manual will void your warranty as to  
any resulting damage.  
Normal wear parts or components thereof are subject to sep-  
arate terms as follows: All normal wear parts or component  
failures will be covered on the product for a period of 90 days  
regardless of cause. After 90 days, but within the two year  
period, normal wear part failures will be covered ONLY IF  
caused by defects in materials or workmanship of OTHER  
component parts. Normal wear parts and components  
include, but are not limited to: batteries, belts, blades, blade  
adapters, grass bags, rider deck wheels, seats, snow thrower  
skid shoes, shave plates, auger spiral rubber, tires.  
The provisions as set forth in this warranty provide the  
sole and exclusive remedy arising from the sale. MTD  
LLC shall not be liable for incidental or consequential  
loss or damage including, without limitation, expenses  
incurred for substitute or replacement lawn care services  
or for rental expenses to temporarily replace a warranted  
product.  
HOW TO OBTAIN SERVICE: Warranty service is available,  
WITH PROOF OF PURCHASE, through your local autho-  
rized service dealer. To locate the dealer in your area, check  
your Yellow Pages, or contact MTD LLC at P.O. Box 361131,  
Cleveland, Ohio 44136-0019, 1-800-800-7310, 1-330-220-  
Some states do not allow the exclusion or limitation of inci-  
dental or consequential damages, or limitations on how long  
an implied warranty lasts, so the above exclusions or limita-  
tions may not apply to you.  
In no event shall recovery of any kind be greater than the  
amount of the purchase price of the product sold. Alteration  
of safety features of the product shall void this warranty.  
You assume the risk and liability for loss, damage, or injury to  
you and your property and/or to others and their property  
arising out of the misuse or inability to use the product.  
This limited warranty does not provide coverage in the follow-  
ing cases:  
a. The engine or component parts thereof. These items  
carry a separate manufacturers warranty. Refer to the  
applicable manufacturers warranty for terms and condi-  
tions.  
This limited warranty shall not extend to anyone other than  
the original purchaser or to the person for whom it was pur-  
chased as a gift.  
b. Log splitter pumps, valves, and cylinders have a sepa-  
rate one year warranty.  
c. Routine maintenance items such as lubricants, filters,  
blade sharpening, tune-ups, brake adjustments, clutch  
adjustments, deck adjustments, and normal deterioration  
of the exterior finish due to use or exposure.  
HOW STATE LAW RELATES TO THIS WARRANTY: This  
limited warranty gives you specific legal rights, and you  
may also have other rights which vary from state to state.  
MTD LLC, P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 1-800-800-7310  
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