Isuzu 3LD2 User manual

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.
Doosan purchased Bobcat Company from Ingersoll-Rand Company in
2007. Any reference to Ingersoll-Rand Company or use of trademarks,
service marks, logos, or other proprietary identifying marks belonging
to Ingersoll-Rand Company in this manual is historical or nominative
in nature, and is not meant to suggest a current affiliation between
Ingersoll-Rand Company and Doosan Company or the products of
either.
Revised (10-12)

FOREWORD
The ISUZU industrial diesel engines are a product of ISUZU’s long
years of experience, advanced technology. ISUZU 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
ISUZU engine outlet. He knows your engine best and is ready to
meet your satisfaction.
All information, illustrations, and specifications contained in this
Manual are based on the latest product information available at the
time of publication.
ISUZU reserves the right to make changes in this Manual at any
time without prior notice.
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CAUTION AND NOTICE
SAFETY WARNINGS
CAUTION: These mean there is something that could hurt you or other
people.
In the caution 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 cautions. If you don’t, you or
others could be hurt.
ENGINE OR EQUIPMENT DAMAGE WARNINGS
NOTICE: These mean there is something that could damage your engine or
equipment.
In the notice 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 notice will tell you what to do to help avoid the
damage.

TABLE OF CONTENTS
1. ENGINE EXTERNAL VIEWS ........................................................... 7
2. GENERAL INFORMATION .............................................................. 3
7. EPA CERTIFIED ENGINE DATA AND SPECIFICATIONS ........ 3
2. ENGINE /DENT/FICA T/ON ........................................................ 7
3. ISUZU ENGINE AFTER SERVICE ............................................. 8
3. FUEL, LUBRICANT, AND COOLANT ............................................. 9
1. FUEL ........................................................................................... 9
2. LUBRICANT ............................................................................... 15
3. COOLANT .................................................................................. 16
4. ENGINE OPERAT/ON ...................................................................... 17
7. CHECK BEFORE OPERATION .................................................. 79
2. ENGINE STARTING .................................................................. 25
3. CHECK AND OPERATION AFTER THE ENGINE START-UP.. . 29
4. CARE IN THE ENGINE OPERATION ........................................ 32
5. ENGINE STOPPING .................................................................. 38
6. OPERATION AND CARE FOR NEW ENGINE .......................... 39
7. ENGINE CARE FOR OVER-COOLING ...................................... 39

8. STARTING THE ENGINE AFTER BEING LEFT UNUSED
FOR A LONG PERIOD OF TIME .*.........................,..............,*... 40
5. PERIODICAL INSPECTION AND MAINTENANCE ......................... 4 1
1. LUBRICATING SYSTEM ~......,...................,.......,,.......~.........,,,,, 47
2. COOLING SYSTEM .,......,.........,,.....*,......,,,,..,...,.,......,.....,,...,,,. 45
3. FUEL SYSTEM ...........................................*.....*......................... 49
4. AIR INTAKE SYSTEM ............~.......................~............~............. 53
5. ENGINE ELECTRICAL .........~........~..~........~...............*...........~.... 55
6. ENGINE ASSEMBLY AND OTHERS ..................~..................... 58
6. ENGINE CARE IN COLD SEASON .............*.......................*....*...... 62
7. ENGINE ELECTRICAL WIRING DIAGRAMS ........*......................... 67
8. ENGINE MAINTENANCE SCHEDULE ..........................~................. 68
9. SIMPLE ENGINE TROUBLESHOOTING .~.......~...,~,,~..~...~...,.....~.,,. 75
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ENGINE EXTERNAL VIEWS
1. EXTERNAL VIEW (LH)
Thermostat housing
\
Cylinder head cover
I
Water
Alter-1
Water drain plug
//w
aust manihold
Star
/ ter motor
Note:
Engine details may
vary depending on the
specifications.
Fig. 1
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2. EXTERNAL VIEW (RH)
Nozule holder Oil filler cap
Injection pum
Oil filter /
, Cooling fan
Oil dipstick - ’ Oil drain plug
Fig. 2
Oil filler cap
Crank pulley
Note: I
Engine details may
vary depending on the
specifications.
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2I GENERAL INFORMATION
I. EPA CERTIFIED ENGINE DATA AND SPECIFICATIONS
Se rapporter a la fin de ce document pour les informations EPA en francais.
(1) Model 3LD2
ISUZU engine model name 3LD2
Engine family *SZXLOl. 5YNB
Engine code 3LD2XXXXX-XX
Engine type Water-Cooled, four cycle, in-line overhead valve type
1 Combustion type Direct injection
No. of cylinders - bore x stroke (mm) 3 - 83.1 x 92
Engine displacement L (cid) 1.496 (91.3)
Impression ratio I 18.8 to 1 I
Firing order
Rated power: SAE NET kW(hp)/minl
Fuel flow at rated power (mm3/stroke)
l-3-2
27.7 (37.2) / 3250
22.4
Exhaust emission control system
Injection pump
Governor
Engine modification
Bosch, PFR type
Mechanical, variable speed type
Injection nozzles
Specified fuel
Multi-hole type
Diesel fuel (ASTM D975 No.2-D)
* Mark ;Put a letter codes for model year on the top of the letters.
Y : 2000, 1 : 2001, 2 : 2002, 3 : 2003 Model Year
Engine code varies depending on each engine. 3

3LD2
*2 Starter (V-kW) 12 - 1.2
*2 Alternator W-4 12 - 20
Specified engine oil (API grade) CC or CD
*2 Lubrication oil volume L (qtd 6.3 (6.7)
Coolant volume (Engine only) L (qts) 2.5 (2.6)
*2 Engine dry weight kg (lb) 132 (291)
Overall length mm (in) 537 (21.1)
*2 Engine
dimensions Overall width mm (in) 475 (18.7)
Overall height mm (in) 590 (23.2)
Valve clearance (cold) mm (in) 0.20 (0.0078) for exhaust and intake
Nozzle injection pressure MPa (psi) 17.7 (2560)
*2 Injection timing B.T.D.C. 13"
Specification for items marked with an asterisk (*2) will vary according to the type of
equipment in which the engine is installed.
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