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Shibaura Diesel Engine
Operation Manuals
E673L
S773L
N843
N843L
N844L
N844L-T
Supported by
Hustler Turf Equipment Company
and
Excel Industries, Inc.
109821_0508
1
FOREWORD
The IHI Shibaura Machinery Corporation (ISM) industrial diesel engines are a product of ISM's long years of experience,
advanced technology. Shibaura takes great pride in the superior durability and operating economy of these engines.
In order to get the fullest use and benefit from your industrial engine, it is important that you operate and maintain it correctly.
This Manual is designed to help you do this.
Please read this Manual carefully and follow its operating and maintenance recommendations. This will ensure many years of
trouble-free and economical engine operation.
Should your engine require servicing, please contact your nearest Authorized Hustler Turf Dealer. He knows your engine best
and is ready to meet your needs.
All information, illustrations, and specifications contained in this Manual are based on the latest product information available
at the time of publication.
Shibaura reserves the right to make changes in this Manual at any time without prior notice.
CALIFORNIA
Proposition 65 Warning
Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other
reproductive harm.
Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California
to cause cancer and birth defects or other reproductive harm. Wash hands after handling.
109821_0508
3
FEDERAL and CALIFORNIA EMISSIONS WARRANTY
WARRANTY STATEMENT
IHI Shibaura Machinery Corporation (ISM) warrants that your 2004 and later non-road diesel engine was designed, built and
equipped to conform to applicable U.S. Environmental Protection Agency (EPA) and California Air Resources Board (CARB)
regulations and is free from defects in materials and workmanship which cause it to fail to conform with such regulations, for the
following period of operation:
● For a period of two (2) years or 1,500 hours of operation, whichever occurs first, after the date of delivery to the initial
retail owner of any variable speed non-road diesel engine rated at less than 19kW (25hp) and any constant-speed non-
-1
road diesel engine rated at less than 37 kW (50hp) with rated speed greater than or equal to 3,000 min
.
● For a period of five (5) years or 3,000 hours of operation, whichever occurs first, after the date of delivery to the initial
owner for all other non-road diesel engines.
WARRANTY INFORMATION
The model year, class of diesel engine, and emission application for your engine are identified on the emission control infor-
mation label affixed to the right hand side of your engine's timing gear case.
Any emission control system parts that are proven defective during normal use will be repaired or replaced during the war-
ranty period.
The warranty repair or replacement will be performed by any Authorized Hustler Turf Dealer or the distributor of the original
equipment manufacturer, with no charge for parts or labor (including diagnosis).
As the engine owner, you are responsible to perform all the required maintenance listed in your owner's manual.
ISM will not deny an emission warranty claim solely because you have no record of maintenance; however, a claim may be
denied if your failure to perform maintenance resulted in the failure of a warranted part. Receipts covering regular maintenance
should be retained in the event of questions and these receipts should be passed on to each subsequent owner of the engine.
It is recommended that replacement parts used for maintenance or repairs be ISM Service Parts to maintain the quality origi-
nally designed into your emission certified engine. The use of non-ISM parts does not invalidate the warranty on other compo-
nents unless the use of such parts causes damage to warranted parts.
ISM wishes to assure that the emission control systems warranty is being properly administered. If you believe you have not
received the service to which you are entitled to under this warranty, you should contact your Authorized Hustler Turf Distribu-
tor.
EXCEPTIONS
Please note that Emission Warranty does not cover the following:
1. Diagnosis or inspection expenses that do not result in eligible claim.
2. Consequential damage such as loss of time, inconvenience, loss of use of the engine or equipment.
3. Replacement parts used for required maintenance.
4. Conditions resulting from tampering, misuse, abuse, improper adjustment, engine alteration, use of add-on or modified
parts, use of replacement parts that are not the same in performance and durability as the approved parts, accident, failure to
use recommended fuel or oil, use of unapproved fuel or oil additives, or not performing required maintenance.
5. Damages or repair costs caused by the Owner's unreasonable delay in making the engine available for inspection and repair.
6. Replacement parts used for required or scheduled maintenance.
PARTS COVERED
This emission control system warranty applies to the following emission control parts.
• Fuel Injection Pump
• Fuel Injectors
• Intake Manifold
• Exhaust Manifold Turbocharger (if equipped)
• Positive Crankcase Ventilation system parts (including PCV Valve and Oil Filler Cap)
4
109821_0508
TABLE OF CONTENTS
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
Engine external views
Engine main parts nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
General information
3.1
Engine data and specifications. . . . . . . . . . . . . . . . . . . . . . . . .7
ISM engine after service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
Fuel, lubricant and coolant
5.1
5.2
5.3
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Lubricant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Engine operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
Check before operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
Engine starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Check and operation after the engine start-up . . . . . . . . . . . .13
Precautions during engine operation . . . . . . . . . . . . . . . . . . .13
Engine stopping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Run-in (break-in) for new engine . . . . . . . . . . . . . . . . . . . . . .15
Engine care for over cooling. . . . . . . . . . . . . . . . . . . . . . . . . .15
Starting the engine after being left
unused for a long period of time. . . . . . . . . . . . . . . . . . . . . . .15
Periodic inspection and maintenance
7.1
7.2
7.3
7.4
7.5
7.6
Lubricating system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
Cooling system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
Fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Air intake system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Engine electricals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
Engine assembly and others . . . . . . . . . . . . . . . . . . . . . . . . .20
Engine care in cold season . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
8.1
8.2
8.3
8-4
8-5
Fuel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Engine starting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
Engine maintenance schedule. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Simple engine troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
109821_0508
5
In the caution area, we tell you about something that can
damage your engine or equipment. Many times, this damage
would not be covered by your warranty, and it could be costly.
But the caution will tell you what to do to help avoid the dam-
age.
1. Safety
Introduction
This Operation Manual contains the information you will
need to operate the engine correctly. Check that you have the
correct Operation Manual for your engine.
2. Engine external views
Read the book carefully before operating or servicing
the engine. Incorrect operation or servicing of the engine
could result in personal injury or material damage as well as
damaging the engine itself. If you do not understand or are
uncertain on any operation in this book, contact your
dealer who can explain or demonstrate the procedure for
you.
Engine main parts nomenclatures
1. Stop solenoid
2. Oil filler cap
3. Nozzle and holder
4. Fan
5. Engine control lever
6. Oil dipstick
7. Oil sump
Warning and Caution
In this manual and on the engine you will find the follow-
ing special warning symbols.
8. Injection pump
9. Oil drain plug
10. Flywheel
Safety Warnings
11. Oil filter
12. Water drain cock
13. Air intake
14. Head cover
15. Exhaust manifold
16. Starting motor
17. Alternator
WARNING: This means there is something that could
hurt you or other people.
In the warning area, we tell you what the hazard is. Then
we tell you what to do to help avoid or reduce the hazard.
Please read these warnings. If you don't, you or others could
be hurt.
18. Crankshft pulley
19. Belt
Engine or Equipment Damage Warnings
CAUTION: This means there is something that could
damage your engine or equipment.
2
4
3
13
14
1
12
5
15
16
8
19
11
18
6
17
9
7
10
6
109821_0508
3. General Information
3.1.Engine data and specifications
Model Name
E673L
S773L
N843
N843L
N844L
N844L-T
Engine Type
Four cycle, water-cooled, in-line overhead valve type
Swirl chamber
Combustion type
No.of cylinder-bore×stroke (mm)
Engine displacement (L)
Compression ratio
3 - 67×72
0.761
3 - 77×81
1.131
3 - 84×90
1.496
3 - 84×100
1.662
4 - 84×100
2.216
4 - 84×100
2.216
23.5
23.5
22.5
22.5
22.5
22.5
16.5hp/3000
(12.3kW/3000)
18.5hp/3600
24.7hp/3000
(18.4kW/3000)
29.1hp/3600
29.4hp/2600
(21.9kW/2600)
30.8hp/3600
32.6hp/2600
(24.3kW/2600)
34.2hp/3600
44.9hp/2600
(33.5kW/2600)
46.3hp/3600
54.7hp/2600
(40.8kW/2600)
56.8hp/3600
42.4kW/3000
* Max output
(13.8kW/3600)
(21.7kW/3600)
(23.0kW/3000)
(25.5kW/3000)
(35.0kW/3000)
13.8hp/3000
(10.3kW/3000)
15.4hp/3600
23.3hp/3000
(17.4kW/3000)
24.8hp/3600
16.6hp/1500
(12.4kW/1500)
19.7hp/1800
N/A
N/A
N/A
N/A
25.3hp/1500
(18.9kW/1500)
29.6hp/1800
31.1hp/1500
(23.2kW/1500)
37.8hp/1800
* Rated output
(11.5kW/3600)
(18.5kW/3600)
(14.7kW/1800)
(22.1kW/1800)
(28.2kW/1800)
Overall length (in) (mm)
17.4 (443)
15.2 (385)
17.8 (453)
15.1 (384)
21.0 (534)
18.1 (459)
21.0 (534)
18.1 (459)
25.1 (637)
17.8 (453)
25.3 (642)
20.3 (516)
* Engine
Overall width (in) (mm)
Overall height (in) (mm)
dimension
21.5 (546)
165.3 (75)
23.6 (600)
191.8 (87)
25.9 (657)
27.1 (689)
28.1 (713)
27.5 (698)
* Engine dry weight (lbs.) (kg)
Direction of rotation
330.7 (150)
352.7 (160)
429.9 (195)
447.5 (203)
Counter clockwise (Look at Flywheel side)
2.85 (2.7) 2.96 (2.8)
Pressurized circulation by trochoid pump
2.85 (2.7) 6.34 (6.0)
Quality better than CD class(API)
Coolant volume (Engine only) (qt) (L)
Lubrication method
1.37 (1.3)
3.28 (3.1)
2.00 (1.9)
5.18 (4.9)
3.80 (3.6)
8.66 (8.2)
3.80 (3.6)
8.66 (8.2)
Lub. Oil volume (qt) (L)
Specified engine oil (API grade)
* Alternator (V-A)
12-14
12-15
12-40
12-1.7
* Starting Motor (V-kW)
Specified fuel
12-0.8
12-2.0
SAE NO. 2-D, DIN 51601, BS Class A-1
Centrifugal all-speed control
Governor
NOTE:
1. The specifications above are subject to partial changes without notice.
2. Asterisked (*) items may vary depending on the type of equipment in which the engine is installed.
4. Shibaura Engine Service
(1) Shibaura Engine After Service
Please feel free to contact your Hustler Turf Equipment
Dealer which is authorized by Shibaura for periodic inspec-
tion and maintenance.
When ordering service or spare parts always quote the
engine model name and serial number.
(2) Engine Identification
Model Name
The engine serial number and engine model are stamped
on the front upper right side of the cylinder body.
XXXXXXXXXXX
serial no.
3/04
IHI Shibaura Machinery Corporation
Serial Number
Assembled Months / Years
109821_0508
7
Number 1-D and Number 2-D). This blended fuel is usually
called Number 2-D also, but can be used in colder tempera-
tures than Number 2-D fuel which has not been "winterized".
Check with the service station operator to be sure you get the
properly blended fuel.
Note that diesel fuel may foam during a fill-up. This can
cause the automatic pump nozzle to shut off even though your
tank is not full.
5. Fuel, Lubricant & Coolant
5.1 Fuel
(1) Fuel Selection
The following specific characteristics are required for the
diesel fuel.
1. Must be free from minute dust particles.
2. Must have adequate viscosity.
3. Must have high cetane value.
4. Must have high fluidity at low temperature.
5. Must have low sulfur content.
6. Must have little residual carbon.
CAUTION: Do not use home heating oil or gaso-
line in your diesel engine; either may cause engine
damage.
(3) Handling of the Fuel
Diesel fuels
Fuel containing dust particles or water will cause engine
failure. Therefore, the following notice must be observed.
1. Prevent dust particles or water from entering when filling
the fuel tank.
Applicable Standard
Recommendation
NO. 2
JIS (Japanese Industrial Standard
DIN (Deutsche Industrie Normen)
When fueling is done from an oil drum directly, keep the
drum stationary for a period of time to allow the sediment
to go to the bottom of the drum.
Din 51601
NO. 2-D
SAE (Society of Automotive Engi-
neers) Based on SAE-J-313C
2. Always fully fill the fuel tank. Drain the sedimented par-
ticles in the fuel tank frequently by opening the tank
drain and draining the fuel into approved fuel containers.
BS (British Standard)
Based on BS/2869-1970
Class A-1
(4) Water in Fuel
(2) Fuel Requirements
During refueling, it is possible for water (and other con-
taminants) to be pumped into your fuel tank along with the
diesel fuel. This can happen if a service station does not regu-
larly inspect and clean its fuel tanks, or if a service station
receives contaminated fuel from its supplier(s).
To protect your engine from contaminated fuel, there is a
fuel filter system on the engine or equipment which allows
you to drain excess water.
CAUTION: The fuel injection pump, injector or
other parts of the fuel system and the engine can
be damaged if you use any fuel or fuel additive
other than those specifically recommended by
Shibaura. Such damage is not Shibaura's responsi-
bility, and is not covered by the Warranty. To help
avoid fuel system or engine damage, please be
aware of the following:
Some service stations mix used engine oil with
diesel fuel. Some manufacturers of large diesel
engines allow this; however, for your diesel
engine, do not use diesel fuel which has been con-
taminated with engine oil. Besides causing engine
damage, such fuel can also affect emission control.
Before using any diesel fuel, check with the ser-
vice station operator to see if the fuel has been
mixed with engine oil.
Do not use any fuel additive (other than as recom-
mended under "Biocide" in this section). At the
time this manual was printed, no other fuel addi-
tive was recommended. (See your authorized
dealer to find out if this has changed.)
WARNING: The water/diesel fuel mixture is
flammable, and could be hot. To help avoid per-
sonal injury and/or property damage, do not touch
the fuel coming from the drain valve, and do not
expose the fuel to open flames or sparks.
Be sure you do not overfill the container. Heat
(such as from the engine) can cause the fuel to
expand. If the container is too full, fuel could be
forced out of the container. This could lead to a
fire and the risk of personal injury and/or vehicle
or equipment damage.
(5) Biocides
Your engine is designed to use either Number 1-D or
Number 2-D diesel fuel. However, for better fuel economy,
use Number 2-D diesel fuel whenever possible. At tempera-
tures less than -7°C, (20°F), Number 2-D fuel may pose oper-
ating problems (see "Cold Weather Operation" which
follows). At colder temperatures, use Number 1-D fuel (if
available) or use a "winterized" Number 2-D (a blend of
In warm or humid weather, fungus and/or bacteria may
form in diesel fuel if there is water in the fuel.
CAUTION: Fungus or bacteria can cause fuel sys-
tem damage by plugging the fuel lines, fuel filters
or injector. They can also cause fuel system corro-
sion.
8
109821_0508
If fungus or bacteria has caused fuel system problems, you
should have your authorized dealer correct these problems.
Then, use a diesel fuel biocide to sterilize the fuel system (fol-
low the biocide manufacturer's instructions). Biocides are
available from your dealer, service stations, parts stores and
other automotive places. See your authorized dealer for
advice on using biocides in your area and for recommenda-
tions on which biocides you should use.
(1) Engine Oil Selection
Quality better than CD grade by API classification engine
oil must be used for the Shibaura engines.
(2) Oil Viscosity
Engine oil viscosity largely affect engine startability, per-
formance, oil consumption, speed of wear and occurrence of
seizure, etc.
(6) Smoke Suppressants
Using lubricants with viscosity rated according to the
atmospheric temperature is important.
Because of extensive testing of treated fuel versus
untreated fuel, the use of a smoke suppressant additive is not
recommended because of the greater possibility of stuck rings
and valve failure, resulting from excessive ash deposits.
CAUTION:
1. Using a mixture of different brand or quality oils
will adversely affect the original oil quality; there-
fore, never mix different brands or different types
of oils.
5.2 Lubricant
2. Don't use API, CA, CB grade and reconstituted
engine oil.
3. Engine damage due to improper maintenance, or
using oil of the improper quality and/or viscosity,
is not covered by the warranty.
The quality of engine oil may largely affect engine perfor-
mance, startability and engine life.
Use of unsuitable engine oil will result in piston ring, pis-
ton and cylinder seizure and accelerate the sliding surface
wear causing increased oil consumption, lowered output and,
finally engine failure. To avoid this, use the specified engine
oil.
ENGINE OIL VISCOSITY GRADE AMBIENT TEMPERATURE
6$(ꢀꢆꢂ
ꢀꢀꢀ6$(ꢀꢁꢂꢃꢁꢂ:
SINGLE GRADE
6$(ꢀꢄꢂ:
6$(ꢀꢅꢂ
᧬ഒ ᧭᧱ഒ
᧩᧯᧬ഒ ᧩᧮᧬ഒ ᧩᧭᧱ഒ
(-4F)
᧮᧱ഒ
᧯᧬ഒ
AMBIENT
TEMPERATURE
᧩᧮᧮ᨂ
᧤᧱ᨂ᧥ ᧤᧯᧮ᨂ᧥᧤᧱᧵ᨂ᧥᧤᧳᧳ᨂ᧥᧤᧴᧲ᨂ᧥
6$(ꢀꢂ:ꢇꢅꢂ
6$(ꢀꢄꢂ:ꢇꢅꢂ
MULTI GRADE
6$(ꢀꢄꢈ:ꢇꢆꢂ
FIG-1
109821_0508
9
5.3 Coolant
● Drain oil to the max. oil level if oil level is above the
max. level mark.
Use 50/50 mix Ethylene Glycol and water for coolant and
replace it periodically. (Refer to section 8.2)
● Add oil to the max. oil level if oil level is below the
min. level mark.
3. Also check the sample oil on the dipstick for fouling and
degrees of viscosity.
6. Engine Operation
CAUTION: Oil level check must be made ten or
twenty minutes after the engine has been stopped.
When the oil level check is necessary while the
engine is running, stop the engine and keep it sta-
tionary ten or twenty minutes until the oil thor-
oughly flows down to the oil pan.
Engine Exhaust Gas Caution
(Carbon Monoxide)
WARNING: Do not breathe exhaust gas because
it contains carbon monoxide, which by itself has
no color or odor. Carbon monoxide is a dangerous
gas. It can cause unconsciousness and can be
lethal.
If at any time you think exhaust fumes are entering
the cab, have the cause determined and corrected
as soon as possible. If you must drive under these
conditions, drive only with all windows fully open.
Protect against carbon monoxide entry into the
cab. The best way is to keep the engine exhaust
system, cab and cab ventilation system properly
maintained. We recommend that the exhaust sys-
tem and cab be inspected by competent technician:
● Each time the vehicle has an oil change.
● Whenever a change is noticed in the sound of
the exhaust system.
Max. Level
Min. Level
● Whenever the exhaust system, underbody or cab
is damaged or becomes corroded.
See the "Maintenance Schedule" in this manual for
parts requiring inspection.
Engine oil replenishment
Changing the oil
To allow proper operation of your vehicle's venti-
lation system, keep the air inlet grille clear of
snow, leaves or other obstructions at all times. Do
not run the engine in confined areas (such as
garages or next to building) any more than needed
to move the vehicles or the equipment.
Keep the exhaust tailpipe area clear of snow and
other material to help reduce the buildup of
exhaust gases under the vehicle or the equipment.
This is particularly important when parked in bliz-
zard conditions.
1. Before adding engine oil, place the unit on a level sur-
face, then remove the dipstick to provide crankcase venti-
lation.
2. MODELS E673L, S773L, N844L, N844L-T ONLY
Add engine oil slowly. Pouring the oil too quickly can
result in the oil overflowing into the air breather valve
and then into the air intake manifold. Cranking the
engine with oil in the manifold will severely damage the
engine.
NOTE: If oil has entered the air intake manifold it will be
necessary to clean the oil from the cylinders. To clean the
cylinders, remove the fuel injection nozzles and turning
the engine with the starter until all oil is exhausted.
When changing the engine oil, add the exact amount
specified in the engine owner’s manual.
NOTE: Use CD grade or better by API classification
engine oil.
MODELS N843 & N843L ONLY — Add oil at the oil
fill shown.
6.1 Check Before Operation
WARNING: For safety's sake, conduct the inspec-
tion before start-up with the engine stopped.
(1) Engine Oil Level
1. Place the engine on a level surface.
2. Remove the dipstick from the crankcase, wipe it with a
clean shop towel or cloth.
When changing the engine oil, add the exact amount
specified in the engine owner’s manual.
Use CD grade or better by API classification engine oil.
3. Wait about fifteen minutes until the oil gets down to the
oil pan. Then check the oil level with a dipstick. A certain
period of time is required before the engine oil com-
pletely flows down from the oil filler to the crankcase.
Insert it fully and remove it gently again.
Check the oil level by the level marks on the dipstick.
The oil level must be between the "Max." level mark and
the "Min." level mark as illustrated.
Take care not to add too much engine oil.
10
109821_0508
1. When the belt is depressed about 5 mm (0.197 in) with
the thumb (about 50 N (11 lb) pressure) at midway
between the fan pulley and alternator pulley, the belt ten-
sion is correct.
Pour oil slowly to prevent
oil from flowing into the
air intake manifold
When the belt tension is too high, it will result in alterna-
tor failure.
Also, a loose belt will cause belt slippage which may
result in damaged belt and abnormal noise.
2. Check the belts. Replace them if any damage is found.
CAUTION: Replace all belts as a set even when
one is not usable. Single belt of similar size must
not be used as a substitute for a matched belt set.
Otherwise, premature belt wear would result
because of uneven belt length.
Oil Fill
Oil Fill
N843 & N843L
(3) Coolant Level Check
1. The coolant level must be midway between "FULL" and
"LOW" marks of the reserve tank.
Check and see that the level is correct.
When the coolant level is lower than the "LOW" mark,
fill the reserve tank at the filler port, but when the reserve
tank is empty, fill at the radiator filler port.
2. Remove the radiator filler cap, and check the coolant
level.
Fill radiator to 2.54 cm (1”) below the filler cap.
WARNING: Do not remove the radiator filler cap
while the engine is still hot. Allow the engine to
cool and then cover the cap with a cloth, turn it
slowly to gradually release the pressure. Then
remove the cap.
CAUTION: If the engine oil is splashed on the fan
drive belt, it causes belt slippage or slackness;
therefore, take care to avoid it.
WARNING: In adding oil, take care not to spill it.
If you spill oil on engine or equipment, wipe it
properly, or this could lead to a fire and the risk of
personal injury and/or equipment damage.
3. Use only 50/50 anti-freeze and water as a coolant.
(4) Radiator Cap Condition
(2) Fan Belt Check
Check the fan belt for tension and abnormalities.
After the replenishment of the coolant, install the radiator
cap. Make sure the cap is securely installed.
109821_0508
11
(5) Battery Cable Connection
Check the battery cable connections for looseness or cor-
rosion.
A loose cable connection will result in hard engine starting
or insufficient battery charge.
The battery cables must be tightened securely.
Never reverse "+" and "-" terminals when reconnecting
cables.
Even a short period of reverse connection will damage the
electrical parts.
6.2 Engine Starting
(1) Preparation before starting
1. Make sure that all hydraulic control levers etc. on the
equipment are in the “NEUTRAL” position.
(6) Battery Electrolyte Level
2. Insert the key into the key switch.
The amount of electrolyte in the batteries will be reduced
after repeated discharge and recharge.
Check the electrolyte for the level in the batteries, refill
with distilled water, if necessary.
The battery electrolyte level checking procedure will vary
with battery type. Follow the equipment manufacturer's
instructions.
Turn the key clockwise to “RUN” position and, make
sure that the meters and warning lamps are actuated.
When any abnormality is discovered, turn the key to the
“OFF” position and locate the cause of the abnormality.
RUN
CAUTION: Do not replenish with diluted sulfuric
acid in the daily service.
WARNING:
1) When inspecting the battery, be sure to stop the
engine.
2) As sulfuric acid is used as electrolyte, avoid
contact with eyes, hands, clothes, and metals. If it
gets in your eyes, flush with large amounts of
water at once. Then consult a physician immedi-
ately.
3) Since batteries produce hydrogen gas, do not
make a spark or use fire near the battery.
4) When handling metal objects near the batteries,
be sure not to contact the battery’s "+" terminal.
As the vehicle body is "-", it may cause a spark or
electrical shock.
5) When disconnecting the terminals, start with the
negative "-" terminal. When connecting them,
connect the negative "-" terminal last.
(2) Pre-heating Procedure
As an engine starting aid, pre-heating is required for cold
engine starting.
1. Turn the starter key clockwise to the “PRE-HEAT” posi-
tion in order to heat the glow plugs on the engine.
The pre-heating time varies depending on the types of
pre-heating system as follows:
12
109821_0508
● The type with an indicator light, 10 seconds are
required until the indicator light at the instrument panel
goes off.
The exhaust smoke color after engine warming-up and at
no load operation:
Colorless or
2. Turn the starter key clockwise to the “START” position
as soon as the indication lamp goes off.
light blue . . . . . .Normal (Perfect combustion)
Black color . . . . . . .Abnormal (Imperfect combustion)
White color. . . . . . .Abnormal (Imperfect combustion)
(3) Engine Starting
CAUTION: Engine noise after start-up might be
noisier than that of warmed-up engine and, the
exhaust smoke color also may be blacker than the
normal condition. However, it should normalize
after warm-up.
1. Depress the engine throttle lever or throttle pedal and
turn the starter key clockwise to the “START” position.
The cranking period must not exceed ten seconds.
Continuous starter operation of more than ten seconds
will lead to over discharge of the batteries as well as
starter seizure.
Leakage in the systems
Check the following items:
1. Oil leaks
Check both sides and bottom of the engine assembly for
oil leaks, paying particular attention to the oil pressure
gauge pipe joint, oil filter and oil pipe joints.
2. Fuel system leaks
If the engine cannot be started in a one time attempt, wait
at least 30 seconds for their functional recovery, then
repeat the pre-heating and the starting operations.
CAUTION: Continuous re-engagement of the
starter to the flywheel ring gear will result in dam-
aged starter pinion gear and flywheel ring gear.
Check the fuel injection pump, fuel lines and fuel filter
for leakage.
2. If, after repeated attempts, the engine does not start, wait
for a minute or more, then repeat pre-heating and starting
operations.
3. When repeating starting operation, return the key to the
OFF position and then pre-heat and start the engine once
again.
3. Coolant leaks
Check the radiator and water pump hose connections and
the water drain cocks on the radiator and cylinder blocks
for leakage.
4. Exhaust smoke or exhaust gas leakage
If the engine still will not start, something may be wrong
with the engine. Contact your Authorized Hustler Turf
dealer/service shop if the problem can not be located.
Checking coolant level
The coolant level could drop depending on the equipment
because the mixed air is expelled in about 5 minutes after the
engine started. Let engine cool before removing radiator cap.
Stop the engine, remove radiator cap, and add coolant.
CAUTION: Do not use starting "aids" in the air
intake system. Such aids can cause immediate
engine damage.
WARNING: Hot steam will rush out and you
could get burnt, if the radiator cap is removed
when the engine is hot. Allow engine to cool
before removing radiator cap.
Cover the radiator cap with a thick cloth and
loosen the cap slowly to reduce the pressure, then
remove the cap.
6.3 Check and Operation After Engine Start-up
(1) Engine Warm-up Procedure
Run engine at Low or Middle speed about ten minutes
after the engine has started.
As the lubrication for the entire engine systems will be
done in this warming-up, do not speed up and load it abruptly.
Particularly, observe this in cold season operation.
6.4 Precautions During Engine Operation
During engine operation, always pay attention to the fol-
lowing items if the engine indicates any sign of abnormalities.
(2) Check After the Engine Start-up
(1) Engine Oil Pressure
Check the following items during engine warm-up opera-
tion.
1. Engine oil pressure
Check to see if the oil warning lamp is off.
2. Charge condition
Check to see if the charge warning lamp is off.
3. Engine noise and exhaust smoke color
Pay attention to engine noise and, if any abnormal noise
is heard, check the engine to detect the cause.
Check the fuel combustion condition by exhaust smoke
color.
1. When the engine is warmed up at the specified speed, and
the oil warning lamp is off, the oil pressure is normal.
2. When the oil warning lamp is flashing with the increased
engine speed, stop the engine immediately and check the
engine oil level or for an oil leak.
If the engine oil level is within proper operating range
and no leaks are found contact your local Authorized
Hustler Turf dealer/service shop.
109821_0508
13
(2) Coolant Temperature
If no steam or engine coolant can be seen or heard, open
the engine access cover. If the engine coolant is boiling, wait
until it stops before proceeding. Look at the see-through
reserve tank. The engine coolant level should be between the
"MAX" and "MIN" marks on the reserve tank. If necessary,
pour engine coolant into the reserve tank only, never directly
into the radiator. Also, do not check engine coolant level at
the radiator.
The engine performance is adversely affected if engine
coolant temperature is too hot or too cold.
The normal coolant temperature is 75 to 90°C (167 to
194°F).
Overheating
Make sure the fan belts are not broken, or off the pulleys,
and that the fan turns when the engine is started.
WARNING: If the Engine Coolant Temperature
Gage shows an overheat condition or you have
other reason to suspect the engine may be over-
heating, continued operation of the engine (other
than as spelled out here) even for a short period of
time may result in a fire and the risk of personal
injury and severe equipment damage.
If the engine coolant level in the reserve tank is low, look
for leaks at the radiator hoses and connections, heater hoses
and connections, radiator, and water pump. If you find major
leaks, or spot other problems that may have caused the engine
to overheat, do not run the engine until these problems have
been corrected. If you do not find a leak or other problem,
carefully add engine coolant to the reserve tank. (Engine
coolant is a mixture of ethylene glycol antifreeze and water.
See "Engine Care in cold season" in Section 8 for the proper
antifreeze and water mixture.)
If you see or hear escaping steam or have other reason to
suspect there is a serious overheat condition, stop and park the
equipment as soon as it is safe to do so and then turn off the
engine immediately and get out of the equipment.
The engine cooling system may overheat if the engine
coolant level is too low, if there is a sudden loss of engine
coolant (such as hose splitting), or if other problems occur. It
may also temporarily overheat during severe operating condi-
tion such as:
WARNING: To help avoid being burned, do not
spill antifreeze or engine coolant on the exhaust
system or hot engine parts. Under some condi-
tions the ethylene glycol in engine coolant is com-
bustible.
1. Climbing a long hill on a hot day.
2. Stopping after high rpm.
If the engine coolant level in the reserve tank is at the cor-
rect level but there is still an indication on the instrument
panel of an overheat condition:
If the Engine Coolant Temperature Gage shows an over-
heat condition, or you have reason to suspect the engine may
be overheating, take the following steps:
1. If your air conditioner (if equipped) is on, turn it off. And
turn on the heater.
You must let the engine cool first. You may then add
engine coolant directly to the radiator.
2. Don't turn off your engine.
Once the Engine Coolant Temperature Gauge no longer
indicates an overheat condition, you can resume operating at a
reduced speed. Return to normal operating after about ten
minutes if the gage pointer does not again show an overheat
condition.
3. With the transmission in Neutral, increase the engine
speed to about one-half full operating speed or 1200
RPM, maximum. Bring the idle speed back to normal
after five minutes.
If the engine coolant temperature does not start to drop
within a minute or two:
4. Let the engine run at normal idle speed for two or three
minutes. If the engine coolant temperature does not start
to drop, turn off the engine and get out of the equipment
then proceed as follows:
If no cause for the overheat condition was found, see a
qualified service technician.
Overcooling
The engine operation at low coolant temperature will not
only increase the oil and fuel consumption but also will lead
to premature parts wear which may result in engine failure.
WARNING: To help avoid being burned -
1. Do not open the engine access cover if you see
or hear steam or engine coolant escaping from the
engine compartment. Wait until no steam or
engine coolant can be seen or heard before open-
ing the engine cover.
2. Do not remove the radiator cap or engine cool-
ant reserve tank cap if the engine coolant in the
tank is boiling. Also do not remove the radiator
cap while the engine and radiator are still hot.
Scalding fluid and steam can be blown out under
pressure if either cap is taken off too soon.
(3) Engine Hour meter (Engine Operation Hour Indi-
cating) (If so equipped)
This meter indicates the engine operation hours. Make
sure that the meter is always working during engine opera-
tion.
Periodic engine maintenance is scheduled based on operat-
ing hours indicated on the hourmeter.
(4) Liquid and Exhaust Leakages
Check for lubricant, fuel, coolant and exhaust leaks.
14
109821_0508
(5) Abnormal Engine Noise
6.8 Starting the Engine After Being Left Unused For
A Long Period of Time
Pay attention to the noise from the engine or other related
parts, confirming normal operating noise.
When the equipment is left unused for "more than three
months" without running the engine, conduct a thorough
inspection of the vehicle before starting the engine.
After starting the engine, be sure to warm it up for more
than ten minutes at idling.
(6) Check the Exhaust Color
Check exhaust color as listed in Section 6.3(2)3.
7. Periodic Inspection and Maintenance
(7) Electrical System
Don't turn the key to the “OFF” position while engine is
under load or at full rpm. This may cause electrical parts dam-
age. See Section 6.5.
7.1 LUBRICATING SYSTEM
Servicing of the engine oil or the oil filter element will
affect the engine performance as well as the engine life.
Change the engine oil and the oil filter element periodi-
cally with Shibaura or equivalent filter and oil of correct
grade and viscosity. (Refer to 5.2 Lubricant on page 9.)
6.5 Engine Stopping
1. Make sure that all of the control levers on the equipment
are in NEUTRAL position.
2. Before stopping the engine, cool down the engine by
operating it at low idle speed about three minutes.
With the engine at low idle, check the engine noise and
the engine oil pressure for abnormalities.
(1) Engine Oil and Oil Filter Element Change
Always change the oil filter when changing the engine oil.
Follow the change schedule shown below.
In the turbocharged engine, if the engine is stopped
instantaneously, a dry condition produced by high tem-
perature will take place in the turbocharger rotating parts
which may cause lack of lubrication. This will result in
turbocharger failure.
Change interval
Engine Oil
Initial 50 hours . . . . . . . . . . . . . . . . All Models
Every 100 operating hours . . . . . . All Models
Oil Filter Element
3. Turn the starter key switch to the “OFF” position.
Initial 50 hours . . . . . . . . . . . . . . . . All Models
Every 200 operating hours . . . . . . All Models
CAUTION: Leaving the starter key switch in the
“RUN” position for a long period of time after the
engine has been stopped, will discharge the bat-
tery.
WARNING: To help avoid being burned, do not
drain oil while the engine is still hot.
6.6 Run-In (Break-In) For New Engines
1. Clean the area around the oil filler cap. Remove the filler
cap.
Your Shibaura engine is carefully tested and adjusted in
the factory, however, further, thorough run-in (i.e. break-in)
operation is necessary.
Operating a new engine under extreme loads and/or high
RPM’s, reduces lubrication, resulting in abnormal wear or
engine seizure. Avoid operating the engine under these condi-
tions for the first 100 hours. Observe the following proce-
dures on new engines:
2. Remove the oil pan drain plug and drain the engine oil
completely.
It is advisable that draining be done while the engine is
warm, to minimize the draining time.
Oil
1. Warm up the engine to operating temperature. During
this time do not race the engine.
2. Also do not operate the engine with rapid acceleration,
rapid machine starting and continuous high speed opera-
tion.
6.7 Engine Over-Cooling (Below Normal Operating
Temperature)
Engine over-cooling can cause premature wear and
increased fuel consumption. When the coolant temperature
does not reach 75 to 90°C (167 to 194°F) indefinitely, par-
tially block the radiator to attain the proper operating temper-
ature.
109821_0508
15
CAUTION: Drain the used engine oil into an
approved oil container. Dispose of used oil prop-
erly.
Pour oil slowly to prevent
oil from flowing into the
air intake manifold
2
Oil Fill
1
1. Oil filter
2. Oil filler cap
3. Oil sump
4. Drain plug
4
3
Oil filter element removal
Use a filter wrench to remove the cartridge type oil filter.
Oil filter
Oil Fill
N843 & N843L
Loosen
Tighten
Oil filter element installation
1. Apply light coat of engine oil to the O-ring.
2. Turn in new cartridge until its sealed face comes in con-
tact with the O-ring.
3. Use a filter wrench to tighten the cartridge another 3/4 of
a turn.
Engine oil refilling
1. Reinstall the drain plugs. Remove the oil dipstick from
the engine to allow air to escape.
2. MODELS E673L, S773L, N844L, N844L-T ONLY
Add engine oil slowly. Pouring the oil too quickly can
result in the oil overflowing into the air breather valve
and then into the air intake manifold. Cranking the
engine with oil in the manifold will severely damage the
engine.
NOTE: If oil has entered the air intake manifold it will be
necessary to clean the oil from the cylinders. To clean the
cylinders, remove the fuel injection nozzles and turning
the engine with the starter until all oil is exhausted.
16
109821_0508
When changing the engine oil, add the exact amount
specified in the engine owner’s manual.
7.2 Cooling System
NOTE: Use CD grade or better by API classification
engine oil.
(1) Fan Belt Tension Adjustment
MODELS N843 & N843L ONLY — Add oil at the oil
fill shown.
Adjust fan belt tension when belt becomes loose and when
the belts are replaced. (Refer to Belt Tension section below)
When changing the engine oil, add the exact amount
specified in the engine owner’s manual.
WARNING: To help avoid injury, check and
Use CD grade or better by API classification engine oil.
3. Wait about fifteen minutes until the oil gets down to the
oil pan. Then check the oil level with a dipstick. A certain
period of time is required before the engine oil com-
pletely flows down from the oil filler to the crankcase.
adjust fan belt tension with engine stopped.
Belt tension
Belt tension is normal when it is depressed 5 mm (0.197
in) with the thumb at the midway between the fan pulley and
alternator pulley. (about 50 N (11 lb) depressing force.)
Fan belt slackness : About 5 mm (0.197 in)
(2) Check For Oil Leaks
Idle the engine to raise the oil pressure, then check for oil
leakage.
Oil level recheck
1. Stop the engine and allow the oil to drain to bottom
(approx. 20 minutes).
2. Use the dipstick to recheck the oil level.
3. Add engine oil, if necessary, to bring level to maximum
level.
CAUTION: When the engine is started, the oil
level will slightly drop from the initial level as the
oil fills into the entire oil circuit.
(3) Engine Oil Additives
Engine oils contain a variety of additives. Your engine
should not need any extra additives if you use the recom-
mended oil quality and change intervals.
Adjusting procedure
Belt tension adjustment is made by pivoting the alternator
at the alternator mounting bolt.
1. Loosen the alternator adjusting plate bolt and the alterna-
tor mounting bolt.
(4) Used Oil Disposal
2. Pivot the alternator at the mounting bolt toward the
engine left or right hand side as required.
3. Tighten the mounting bolt and the adjusting bolt.
Do not dispose of used engine oil (or any other oil) in a
careless manner such as pouring it on the ground, into sewers,
or into streams or bodies of water. Instead, recycle it by tak-
ing it to a used oil collection facility which may be found in
your community. If you have a problem disposing of your
used oil, it is suggested that you contact your dealer or service
station. (This also applies to diesel fuel which is contami-
nated with water. See "Diesel Fuel" in Section 1.)
CAUTION: Belt tension may vary slightly after
the alternator is tightened. Therefore, recheck the
belt tension after tightening the bolts.
4. After the adjustment, operate the engine about five min-
utes at a low idle speed, stop engine and recheck the belt
tension particularly when installing new belts. Belt ten-
sion may vary due to the initial belt seating.
(5) Used Engine Oil
WARNING: Used engine oil contains harmful
contaminants that have caused skin cancer in labo-
ratory animals. Avoid prolonged skin contact.
Clean skin and nails thoroughly using soap and
water - not mineral oil, fuels, or solvents. Laun-
der or discard clothing, shoes, or rags containing
used engine oil.
(2) Fan Belt Change
Use of a low quality fan belt will result in premature belt
wear or belt elongation leading to engine damage such as
overheating. Therefore use of Shibaura genuine fan belt is
highly recommended.
Discard used engine oil and other oil properly.
109821_0508
17
Loosen
Filling with coolant
1. Close or tighten the coolant drain plug.
Using a 50/50 mixture of Ethylene Glycol and water
(Refer to section 8.2) fill the radiator with the coolant
until the level comes up to the filler port neck.
2. Fill gradually to prevent air entry.
Alternator
Coolant volume (Engine only) :
Refer to "Main Data Specifications"
(3) Coolant Change
3. After filling operate the engine about five minutes at a
low idle speed to purge the air from the system. The
coolant level will drop.
The coolant must be changed at intervals of 6 months.
Degraded or dirty coolant will lead to engine overheating.
Stop the engine and refill with the coolant.
Coolant draining
1. Remove the radiator cap.
(4) Cleaning Outside of Radiator
Open the drain cock at the radiator lower part to drain the
coolant from the radiator.
Mud or dried grass caught between radiator fins will block
the air flow, resulting in lower cooling efficiency.
Clean the radiator fins with compressed air.
For the cleaning interval, refer to the instruction manual
prepared by the equipment manufacturer.
WARNING: Never remove the radiator filler cap
while the engine is still hot.
Allow the engine to cool before removing the radi-
ator cap.
Cover the cap with a cloth, then turn it slowly to
release the internal pressure.
If the fins are clogged, however, clean them at any time. If
the fins are deformed, repair or replace the radiator.
(5) Cooling System Circuit Cleaning
2. Drain the coolant from the engine by loosening the water
drain cock on the right hand of cylinder body.
When the cooling system is fouled with water scale or
sludge particles, cooling efficiency will be reduced.
Periodically flush the system with a cleaner.
Cooling system cleaning interval; Every 12 months.
7.3 Fuel System
The fuel injection pump and fuel injection nozzles are pre-
cisely manufactured, and therefore, using fuel which contains
water or dust particles will result in either injection pump
plunger seizure or injection nozzle seizure. A fouled fuel filter
element will lead to decreased engine output.
Perform inspection and maintenance periodically as fol-
lows:
Water
Drain
Cock
(1) Removal of Water from the Fuel
If the water reaches the fuel filter element bottom, follow
the procedure below to drain the water.
NOTE: Does not apply to Hustler Diesel Z equipment.
18
109821_0508
CAUTION: If the cup is removed without turning
the lever as instructed, the fuel may flow out.
2. Loosen the ring nut, remove the cup, and take out the ele-
ment.
3. Clean the cup, install a new element, and install new
packing on the ring nut.
4. Tighten the cup to the body securely with the ring nut.
5. After installation, turn the fuel filter lever to the open
position.
WARNING:
1. With the fuel lever in the “OFF” position, the
engine cannot be started.
2. Be careful not to spill fuel on surrounding areas
when removing the fuel cap.
3. After changing the fuel filter element bleed the
air from the system.
Procedure:
1. Turn the fuel lever to the closed position until it stops to
shut off the fuel.
2. Loosen the ring nut, remove the cup together with the
element, and drain the fuel.
3. Clean the cup, install the element and tighten to the filter
body with the ring nut.
4. Turn the fuel filter lever to the open position until it
stops.
(4) Governor Control Seals
As the governor (timing gear case) is precisely adjusted,
most of the controls are sealed, please do not break them.
CAUTION:
1) If the cup is removed without turning the fuel
filter lever just above, the fuel may flow out.
2) The cartridge and cup contain fuel. Take care
not to spill it during disassembly.
3) Perform fuel system air bleeding after the water
in the fuel is drained.
CAUTION: The warranty of the engine can be
affected if the tamper proof seals on the cylinder
block in back of the timing gear case are broken
during the warranty period by a person who is not
authorized by the manufacturer.
7.4 Air Intake System
(1) Air Cleaner
(2) Fuel System Air Bleeding
NOTE: Does not apply to Hustler Diesel Z equipment.
The entry of air into the fuel system will cause hard engine
starting or engine malfunction.
After servicing the fuel system; such as emptying the fuel
tank, fuel system water removal, and the fuel filter element
change, be sure to bleed the air from the system.
Because of the "automatic air-bleeding system" being
employed, turn the starter switch to the "RUN" position and
activate the "electromagnetic pump" to bleed the air.
Engine performance and life vary with the air intake con-
ditions. A dirty air cleaner element reduces the amount of
intake air, causing reduced engine output and/or a poor run-
ning engine.
Also, a damaged element leads to wear of cylinders and
valves, resulting in increased oil consumption, reduced output
and shortened engine life.
Replace the air cleaner element annually or if the air
restriction indicator shows that the element needs replaced.
Air bleeding procedure:
1. When the "starter switch" is set to the "Drive" (ON) posi-
tion to activate the electromagnetic pump, fuel is forcibly
sent to the fuel valve of the injection pump and further to
the leak-off pipe of each nozzle holder, where air in the
fuel leaks off automatically to the fuel tank.
2. Start the engine and check the fuel system for fuel enter-
ing the tank.
CAUTION:
1. Change the element, if element damage is
found.
2. Make sure the air filter seals when reassembling
the air cleaner.
7.5 Engine Electrical
The Shibaura engine uses a 12 volt system and a negative
grounding type for the electrical system.
(3) Fuel Filter Element Change
Change interval
Fuel filter element change interval : Every 200 operating
hours or every season.
(1) Battery Servicing
Battery maintenance schedules will vary with equipment
and battery types.
Follow the equipment manufacturer's instructions.
Change procedure
1. Turn the fuel filter lever to the closed position.
109821_0508
19
Follow the equipment manufacturer's recommendation for
intervals.
Loose connections will cause hard engine starting or insuf-
ficient battery charging.
If the terminals are excessively corroded, disconnect the
battery cables and polish them with a wire brush or sandpaper.
Never reverse the "+" and "-" terminals when reconnecting
the cables. Even a short period of reverse connection could
damage the electrical system.
Cleaning of Battery
Clean the battery with clean water or tepid water and wipe
them with a dry cloth to remove the water.
Apply a light coat of petroleum jelly or grease to the bat-
tery post.
(2) Alternator Servicing
1. The polarity of the alternator is negative grounding type.
When an inverted circuit connection takes place, the cir-
cuit will be in short circuit instantaneously resulting in
alternator failure.
2. Do not put water directly on the alternator. Entry of
water into the alternator leads to electrolyte corrosion
causing an alternator failure.
Use caution when cleaning the engine.
3. Disconnect the battery prior to charging with an external
charger.
Specific gravity of the batteries
The battery charge condition is judged by the electrolyte
specific gravity measurement.
Periodically measure the electrolyte gravity of the batter-
ies.
For the internal check follow the equipment manufac-
turer's standard.
The relationship between the electrolyte specific gravity
and the battery conditions are as follows:
(3) Wiring Connections
Electrolyte Specific Gravity
Over 1.300
Battery Conditions
Check all of the electrical wiring for loose connections and
damage.
Over 100%
(Over charged)
7.6 Engine Assembly and Others
1.290 - 1.270
1.260 - 1.240
Below 1.230
100%
75%
For continued trouble free engine operation over a long
period of time, the servicing items need a skilled maintenance
technician, therefore, consult your dealer on the following
procedures.
Below 50%
(Insufficiently charged)
CAUTION: The battery electrolyte is sulfuric
acid. Prevent contact of electrolyte with skin and
clothes. If this occurs rinse affected area in clean
water.
(1) Fuel Injection Nozzle
Use an injection nozzle tester check the static injection
starting pressure and the fuel spray conditions.
Injection nozzle pressure test interval : Every 1000 opera-
tion hours.
When the injection starting pressure is too high or too low
or the fuel spray pattern is improper, an abnormal fuel com-
bustion takes place in the engine leading to lowered output
and blackish exhaust smoke. Further, it can cause a piston
seizure or damage etc. In such cases, the injection nozzle test
or the nozzle replacement is required.
Specific Gravity Conversion
The specified electrolyte temperature for the gravity mea-
surement is 20°C (68°F).
Measure the electrolyte temperature and use the following
formula for conversion.
S20 = St + 0.0007 (t - 20)
S20 ; gravity at 20°
Injection starting pressure …… Refer to the main data and
specifications.
St ; gravity measured
t ; electrolyte temperature when measured
WARNING: When using a nozzle tester, keep
clear of nozzle end. Fuel oil under high pressure
can cause serious injury
Battery Terminal Connections
Periodically, check the battery terminals for loose connec-
tion and corrosion.
20
109821_0508
Then measure and adjust the clearance of the other
valves.
Faulty
Good
Cylinder No.
1
2
3
4
Valve arrangement
I
E
X
I
E
X
I
E
X
I
E
X
When No. 1 cylinder is at TDC
in the compression stroke
X
X
With the crankshaft rotated
360° in normal direction from
above
X
X
(2) Valve Clearance Adjustment
I: Inlet E: Exhaust
The valve clearance must be adjusted every 1000 operat-
ing hours, or whenever the valve rocker is abnormally noisy,
or if there is an engine malfunction and the fuel system is
working properly.
Valve clearance : 0.20 mm (0.008 in) (When the engine is
cold.)
TOP Mark
Adjustment Procedure
1. Bring No. 1 cylinder to the top dead center in the com-
pression stroke by aligning the top mark of the crank pul-
ley with top mark of the timing gear case.
2. Remove the cylinder cover and turn the crankshaft in the
forward and backward directions.
If the inlet and exhaust valves of No. 1 cylinder do not
move at this time, No. 1 cylinder is at the top dead center.
When the valves move, give another full turn to the
crankshaft and align the top mark of the crank pulley
with the TOP mark of the timing gear case.
Model:E673L, N843, N843L
3) Using the table below reference position of #1 piston and
adjust as necessary, measure and adjust the clearance of
the valves.
Adjust screw
4) On completion of the valve clearance adjustment in step
3 above, realign mark as in step 1 above by rotating the
crankshaft one complete revolution.
Then measure and adjust the clearance of the remaining
unadjusted valves.
Valve
clearance
Cylinder No.
Valve arrangement
1
2
3
I
E
X
I
E
X
I
E
X
When No. 1 cylinder is at TDC in
the compression stroke
(3) Adjustment of Injection Timing
X
X
The injection timing should not be readjusted. Refer to
Engine Service Manual.
With the crankshaft rotated 360° in
normal direction from above
X
(4) Cylinder Compression Pressure Measurement
The cylinder compression pressure measurement should
be done every 2000 operation hours, or whenever the engine
output is reduced.
I: Inlet E: Exhaust
Model:N844L, N844L-T
3) Using the table below reference position of #1 piston and
adjust as necessary, measure and adjust the clearance of
the valves.
4) On completion of the valve clearance adjustment in step 3
above, realign mark as in step 1 above by rotating the
crankshaft one complete revolution.
Compression pressure: 2.94 Mpa (426 psi)
Test condition:
Cranking speed 200 rpm
Coolant temperature 75°C (167°F)
Repair the engine and/or replace parts if compression pres-
sure is lower than 2.45 Mpa (355 psi)
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21
(5) Starter and Alternator Servicing
Service the starter and alternator every 1000 hours of oper-
ation. Do the following:
1. Starter commutator cleaning
2. Alternator slip ring cleaning
components of the cooling system and because of
its low boiling point.
2. High silicate antifreeze is not recommended
because it could cause serious silica gelation prob-
lems.
3. Carbon brushes and the brush contact check
3. Usage and mixing ratio etc. should be followed
to the antifreeze manufacture's recommendations.
(6) Radiator Pressurization Valve Check
A pressurization valve is incorporated in the radiator cap
assembly. Check the valve actuating pressure with a radiator
pressure tester. For the pressurization valve actuating pres-
sure and the check interval, follow the equipment manufac-
turer's standards.
8.3 Engine Oil
Engine oil viscosity largely affects engine startability, so
the use of lubricant with selected viscosity according to the
atmospheric temperature is important. (Refer to page 9)
At low atmospheric temperature, engine oil viscosity will
increase to cause hard engine starting.
8. Engine Care During Cold Season
8.4 Battery
8.1 Fuel
1. Make sure batteries are completely charged during cold
weather.
(1) Fuel Selection
As the discharge current from the battery is more
demanding in cold engine starting, it takes a compara-
tively longer time to recharge the batteries than tit would
after normal engine starting.
In the cold zone, the fuel may gel resulting in hard engine
starting; therefore, select a suitable fuel for these conditions.
Use ASTM 975 No. 2-D fuel if you expect temperature
above - 7°C (20°F).
An insufficiently charged battery is more susceptible to
freezing.
Use Number 1-D if you expect temperatures below - 7°C
(20°F).
Pay attention to keep the battery charged during the cold
season
2. Check and fill the battery with distilled water before
engine operation.
If Number 1-D is not available, a "winterized" blend of 1-
D and 2-D is available in some areas during the winter
months.
Check with the service station operator to be sure you get
the properly blended fuel.
If done after the engine has already been in an operation,
the distilled water will not mix with the original electro-
lyte, allowing the danger of freezing distilled water
remaining in the upper part of the battery cell.
8.2 Coolant
Where the atmospheric temperature falls below freezing
point, the cooling system should be drained after engine oper-
ation, but to eliminate the need for repeated draining and
refilling, the use of anti-freeze solution is highly recom-
mended.
A 50/50 Ethylene glycol base antifreeze/water mix.
(which provides protection to -37°C (-34°F) is recom-
mended for use in these Shibaura diesel engines).
Concentrations over 65% adversely affect freeze protec-
tion, heat transfer rates, and silicate stability which may cause
water pump leakage.
8.5 Engine Starting
When starting the engine, with temperatures of below 0°C
(32°F), following these procedures:
1. Do the preheating operation before cranking the engine
with the starter.
2. Set the engine throttle lever or pedal to the 1/3 position of
the full lever or pedal stroke.
3. If the engine does not start with the initial cranking, wait
a while to allow the batteries to recover their power and,
reattempt the preheating and the cranking operation.
4. In order to protect the starter, cranking time must be lim-
ited to 10 seconds.
Never exceed a 60/40 antifreeze/water mix.
(which provides protection to about -50°C (-58°F).
5. Rapid and repeated engaging and disengaging of the
starter gear with the flywheel ring gear during an attempt
to start the engine indicates a low battery charge. Discon-
nect the battery and charge it.
6. In extreme cold temperature engine starting, crank the
engine with the throttle closed and no preheat to prelube
the engine (initial engine oil flow). Then open the throttle
to 1/3 position and preheat to start.
WARNING: Under some conditions the ethylene
glycol in the engine coolant is combustible. To
help avoid being burned when adding engine cool-
ant, do not spill it on the exhaust system or engine
parts that may be hot. If there is any question,
have this service performed by a qualified techni-
cian.
CAUTION:
CAUTION: Do not use starting "aids" in the air
intake system. Such aids can cause immediate
engine damage.
1. Methyl alcohol base antifreeze is not recom-
mended because of its effect on the non-metallic
22
109821_0508
9. Engine Maintenance Schedule
When performing the following items, the daily inspection items should also be carried out.
Daily Initial
50
Every Every Every Every Every Remarks
NO
1
Description of check and Maintenance
Oil level and condition of oil
Oil leakage check
100
200
400
600
1000
X
X
X
X
X
X
2
3
Oil pressure warning lamp
Engine oil replacement
4
X
X
5
Oil filter element replacement
Fuel leakage check
X
X
6
7
Draining water in
fuel filter
w/water sedimentor
8
Fuel filter element replacement
Injection nozzle check (*)
9
X*
10
11
12
13
Coolant level and condition check
Coolant leakage check
X
X
X
X
Radiator filler cap fitting condition
Fan belt tension check
(Replace if necessary)
14
15
16
Overheat warning lamp
Coolant replacement
X
Yearly per Section 7.2 (5)
X
Radiator external cleaning
* This is a recommended maintenance. The failure to perform this maintenance item will not nullify the emission warranty
or limit recall liability prior to the completion engine useful life. Shibaura however, urges that recommended maintenance
service is performed at the indicated intervals.
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23
Daily Initial
50
Every Every Every Every Every Remarks
NO
17
18
19
20
21
Description of check and Maintenance
Cooling system circuit cleaning
Radiator filler cap function check (*)
Electrolyte level check
100
200
400
600
1000
Yearly
X
X
X
Battery cleaning
Battery charge con-
dition
Charge warning
lamp
X
22
23
24
25
26
27
Electrolyte gravity check
X
Starter and alternator check and cleaning(*)
Wiring and connection check
X
X
Preheating condition check
X
Air cleaner element replacement
X
Engine starting conditions and noise condi-
tions
X
X
28
29
30
Exhaust smoke condition
Cylinder compression pressure(*)
Valve clearance check (*)
Every 2000 hours
X
NOTE:
1. The service intervals after 1000 operation hours should also be made every 100 operation hours in accordance with this
check and maintenance schedule.
2. When the servicing on the asterisked ( * ) items are necessary, consult the equipment supplier.
Explanation of Maintenance Schedule
The following is a brief explanation of the services listed
in the preceding Engine Maintenance schedule.
1. Oil level and condition of oil
Check that the oil level is between the max. level mark and the min. level mark. Drain
oil to the max. level mark If oil level is above the max. level mark. Add oil to the max.
level mark if oil is below the min. level mark.
2. Oil leakage check
3. Oil pressure warning lamp
Replace any damaged or malfunctioning parts which could cause leakage.
Warning lamp is off while engine running. If it stays on, check and repair the lubrication
system.
4. Engine oil replacement
5. Oil filter element replacement
6. Fuel leakage check
Change oil per specified interval.
Change element per specified interval.
Inspect the fuel lines for damage which could cause leakage. Replace any damaged or
malfunctioning parts.
7. Draining water in fuel filter
8. Fuel filter element replacement
9. Injection nozzle check
Drain the sedimented water in fuel filter every 100 hours.
Change element every 200 hours.
Check and adjust injection opening pressure and spray condition (This is a recom-
mended maintenance) every 1000 hours.
10. Coolant level and condition
check
Check coolant level and add coolant if necessary.
11. Coolant leakage check
12. Radiator filler cap
fitting condition
Repair or replace parts as required.
The radiator cap must be installed tightly.
13. Fan belt tension check
14. Overheat warning lamp
Check and adjust fan belt tension. Look for cracks, fraying and wear.
Coolant temperature is normal at about 75° to 90°C (167° to 194°F)
24
109821_0508
15. Coolant replacement
16. Radiator external
cleaning
Use 50/50 anti-freeze and water mixture.
According to the equipment manufacture's specification. (reference: every 500 hours)
17. Cooling system flushing
Flush the cooling system circuit every 2000 hours
18. Radiator filling cap function check Check radiator pressure cap periodically for proper operation according to the equip-
ment manufacturer's specifications. (reference: every 200 hours)
19. Electrolyte level check
20. Battery cleaning
Refill with distilled water if necessary.
Clean the terminals.
21. Battery charge condition
Indicator type, the lamp should be off while engine running.Check charging circuit if
the lamp is not off.
22. Electrolyte gravity check
Check according to the equipment manufacturer's specifications. (reference: every 200
hours)
23. Starter and alternator
check and cleaning
Check wear of brush and commutator (every 1000 hours)
24. Wiring and connection check
25. Preheating condition check
Check according to the equipment specifications. (reference: every 1000 hours)
Check preheating condition of the system.
26. Air cleaner element replacement Change element according to the manufacturer's specifications. (reference: every 200
hours) or per restriction indicator.
27. Engine starting condition
and noise condition
Check engine stability and noise.
28. Exhaust smoke condition
29. Cylinder compression
pressure
Check exhaust smoke color.
Check every 2000 hours.
30. Valve clearance check
Incorrect valve clearance will result in increased engine noise and lower engine output.
Thereby adversely affecting engine performance. Check and adjust every 1000 hours.
10. Simple Engine Troubleshooting
This section contains simple engine troubleshooting
guides. Use this guide to troubleshoot engine problems.
If problem cannot be diagnosed contact your local
Authorized Hustler Turf dealer/service shop.
109821_0508
25
Engine does not start.
Starter does not turn.
Starter turns but engine does not start.
Battery discharged.
Loose cable connections.
Starter or starter switch failure.
Safety relay failure.
Engine starts but stalls immediately.
No fuel injection.
Fuel is injected but engine does not start.
No fuel in the fuel tank.
Clogged fuel filter element or strainer.
Air in the fuel system.
Feed pump malfunction.
Control rack is stuck at no fuel position.
Improper preheating operation.
Glow plug malfunction.
Incorrect injection timing.
Low cylinder compression pressure.
Wrong engine oil viscosity.
Air in the fuel system.
Improper start spring.
26
109821_0508
Unstable engine running
Too high low idling speed.
Unstable low idling
Incorrect control lever adjustment.
Crack in injection pipe.
Incorrect control lever adjustment.
Governor internal malfunction.
Injection nozzle failure.
Engine stop lever restricted at stop position.
Uneven compression pressure between cylinders.
Engine hunting in medium speed range.
Governor spring deteriorated.
Malfunction in engine at high speed range.
Insufficient fuel supply.
Air in the fuel system.
Clogged fuel filter element.
Uneven fuel injection amount
between plungers.
Deteriorated governor spring.
Incorrect valve clearance adjustment.
Deteriorated valve spring.
Engine speed will not slow
Engine control restriction or seizure.
Engine overheat.
Cooling system defect.
Improper servicing.
Insufficient coolant amount.
Fan belt slippage.
Engine over-loaded.
Thermostat malfunction.
Radiator filler cap malfunction.
Cooling system internally fouled.
Radiator clogging.
Air cleaner element clogging.
Insufficient ventilation.
Stopped coolant flow
(high concentration of antifreeze, etc.)
109821_0508
27
Low oil pressure
Improper oil
Lack of oil
High lubricating oil temperature
Oll leakage
Wrong selection of
Over heat
Large oil consumption.
kind and viscosity.
Clogged filter and strainer.
Worn bearings and oil pump.
Faulty relief valve.
Lack of power
Incorrect injection pump adjustment.
Poor cylinder compression pressure.
Injection nozzle malfunction,
Cylinder compression pressure leakage.
lncorrect injection pressure adjustment
Incorrect spray condition
lntake valve clearance
adjustment.
Nozzle holder misalignment
Cylinder bore wear
Insufficient fuel supply to the injection pump
Lack of fuel in tank
Insufficient air intake amount
Air mixing in injection pump
Fuel filter clogged
Air cleaner clogging
Intake restriction
Governor malfunction.
Incorrect engine control adjustment
Deteriorated governor spring
Excessive fuel consumption
Fuel leakage
Too much injection amount
Injection pump misadjustment.
Excessive mechanical loads
Damaged packing.
Improper installation or tightening.
109821_0508
28
Cause
Remedy
Condition
Too much engine oil.
Check and adjust the quantity.
Check and change.
Flush & change oil
See dealer
Too low viscosity of engine oil.
Improper fuel.
Improper color of
engine exhaust
(white or blue)
Improper injection timing.
Engine oil burning or detonation.
See dealer
Overload.
Reduce the load
Check and change.
Check and change.
See dealer
Clogged air cleaner.
Improper fuel.
Excessive fuel injection.
Improper function of fuel injection
pump.
Improper engine
exhaust (black or
dark gray)
See dealer
Clogged fuel filter.
Improper function of engine main
body.
Clean or replacement element
See dealer
All information, illustrations and specifications contained in this manual are based on the latest product information available at
the time of publication. The right is reserved to make changes at any time without notice.
OPERATION MANUAL (INDUSTRIAL)
E673L
S773L
N843
N843L
N844L
N844L-T
Issued by
IHI Shibaura Machinery Corporation, Ltd.
and
Hustler Turf Equipment
30
109821_0508
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