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caterpillar C18 700kva generator set parts manual
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SEBP3816-35
July 2009
VOLUME I
Pages 1-628
Parts
Manual
See “General Information”
for New Parts Manual
Features.
C18 Industrial Engine
WJH1-Up (Engine)
This Parts Manual is also Available in .PDF Format on Compact Disc
(CD-ROM) - Caterpillar Form No. SERP3816
SAFETY.CAT.COM


Product and Dealer Information
Note: For product identification plate locations, see the section “Product Identification Information” in the Operation
and Maintenance Manual.
Delivery Date:
Product Information
Model:
Product Identification Number:
Engine Serial Number:
Transmission Serial Number:
Generator Serial Number:
Attachment Serial Numbers:
Attachment Information:
Customer Equipment Number:
Dealer Equipment Number:
Dealer Information
Name: Branch:
Address:
D e a l e r C o n t a c t P h o n e N u m b e r H o u r s
Sales:
Parts:
Service:

MEMORANDA
MEMORANDA SEBP3816-35

TABLE OF CONTENTS
Name Page Name Page
GENERAL INFORMATION ......... ......... A4
REPAIR ALTERNATIVES .......... .......... A6
SUPPLEMENTAL COOLANT ADDITIVES ... ... A7
MAINTENANCE PARTS ........... ........... A8
INDEX ................... ................... A13
ENGINE ARRANGEMENT .......... .......... 1
ENGINE AR .............................. 1
ENGINE AR-COMPLETE ......... ......... 3
ENGINE AR-CORE ............ ............ 11
BASIC ENGINE ............... ............... 31
ACTUATOR GP-VALVE .......... .......... 31
ADAPTER GP-ENGINE TO TMSN ..... ..... 39
ADAPTER GP-FLYWHEEL ........ ........ 40
ADAPTER GP-OIL PAN DRAIN ...... ...... 42
ADAPTER GP-PUMP DRIVE ....... ....... 43
AIR COMPRESSOR GP .......... .......... 44
BASE GP-VALVE COVER & INJ HARN ... ... 69
BELT GP-SERPENTINE .......... .......... 77
BELT TENSIONER GP .......... .......... 79
BELT TIGHTENER GP .......... .......... 81
CAMSHAFT GP ............. ............. 83
CLUTCH GP ............... ............... 87
COMPRESSOR & MTG GP-REFRIG .... .... 94
COMPRESSOR GP-REFRIGERANT .... .... 97
COVER GP-CYLINDER BLOCK ...... ...... 98
COVER GP-FLYWHEEL HOUSING .... .... 105
COVER GP-FRONT HOUSING ...... ...... 110
COVER GP-VALVE MECHANISM ..... ..... 112
CRANKSHAFT GP ............ ............ 139
CYLINDER BLOCK AS .......... .......... 141
CYLINDER BLOCK GP .......... .......... 147
CYLINDER HEAD AS ........... ........... 155
CYLINDER HEAD GP ........... ........... 163
DAMPER & PULLEY GP ......... ......... 174
DAMPER GP ............... ............... 177
DRAIN GP-ENGINE OIL .......... .......... 180
DRIVE GP-ACCESSORY ......... ......... 181
DRIVE GP-FAN .............. .............. 189
DRIVE GP-POWER TAKE-OFF ...... ...... 211
DRIVE GP-PUMP ............. ............. 215
ENGINE BRAKE GP ........... ........... 216
FASTENER GP-ALTERNATOR ...... ...... 219
FASTENER GP-ENGINE ......... ......... 220
FASTENER GP-FLYWHEEL HOUSING ... ... 223
FASTENER GP-FRONT COVER ...... ...... 224
FASTENER GP-FRONT HOUSING .... .... 228
FASTENER GP-OIL PAN ......... ......... 234
FASTENER GP-SOUND
SUPPRESSION ............. ............. 236
FASTENER GP-VALVE MECHANISM ... ... 237
FLYWHEEL GP .............. .............. 238
GEAR GP-CAMSHAFT .......... .......... 262
GEAR GP-FRONT ............ ............ 263
GEAR GP-REAR ............. ............. 266
GOVERNOR GP-AIR COMPRESSOR ... ... 270
GUARD GP-BELT ............ ............ 272
HOUSING GP-FLYWHEEL ........ ........ 275
HOUSING GP-FRONT .......... .......... 281
KIT-CRANKSHAFT BEARING ....... ....... 292
LIFTING GP-ENGINE ........... ........... 293
LINES GP-AIR COMPRESSOR ...... ...... 301
MECHANISM GP-FUEL PUMP &
VALVE .................. .................. 304
MOUNTING GP-AIR COMPRESSOR .... .... 311
MOUNTING GP-ALTERNATOR ...... ...... 313
MOUNTING GP-ALTERNATOR &
COMPR ................. ................. 331
PAN GP-OIL ............... ............... 335
PANEL GP-SOUND SUPPRESSION .... .... 359
PISTON & ROD GP ........................ 363
PLUG GP-CYLINDER BLOCK ....... ....... 369
PLUG GP-CYLINDER HEAD ....... ....... 378
PLUG GP-ENGINE ............ ............ 381
PLUG GP-FLYWHEEL HOUSING ..... ..... 385
PLUG GP-OIL PAN ............ ............ 386
POWER TAKE-OFF GP .......... .......... 390
PULLEY GP .............................. 394
PULLEY GP-AUXILIARY DRIVE ...... ...... 396
ROCKER ARM GP ............ ............ 398
SEAL GP-CRANKSHAFT ......... ......... 410
SUPPORT GP-ENGINE .......... .......... 413
SUPPORT GP-POWER TAKE-OFF .... .... 422
V-BELT SET ............... ............... 424
LUBRICATION SYSTEM .......... .......... 430
BASE GP-OIL FILTER .......... .......... 430
FASTENER GP-OIL PUMP MOUNTING ... ... 433
FILLER GP-ENGINE OIL ......... ......... 434
FILTER GP-ENGINE OIL ......... ......... 441
FUMES DISPOSAL GP .......... .......... 452
GAUGE GP-OIL LEVEL (DIPSTICK) .... .... 458
GUIDE GP-OIL LEVEL GAUGE ...... ...... 470
LINES GP-ENGINE OIL .......... .......... 476
LINES GP-OIL .............. .............. 489
LINES GP-TURBOCHARGER OIL ..... ..... 490
MOUNTING GP-OIL LEVEL GAUGE .... .... 502
PUMP GP-ENGINE OIL .......... .......... 503
VALVE GP-FLUID SAMPLING ....... ....... 505
COOLING SYSTEM .......................... 506
ADAPTER GP-FAN ............ ............ 506
COOLANT CONDITIONER GP ...... ...... 511
CORE GP-OIL COOLER ......... ......... 529
FAN GP-BLOWER ............ ............ 530
SEBP3816-35 TABLE OF CONTENTS A1

TABLE OF CONTENTS
Name Page Name Page
FAN GP-SUCTION ............ ............ 533
FASTENER GP-OIL COOLER ....... ....... 537
FASTENER GP-WATER LINES ...... ...... 538
FASTENER GP-WATER PUMP ...... ...... 539
FILTER AS-COOLANT CONDITIONER ... ... 541
FITTING GP-RADIATOR VENT ...... ...... 543
FITTING GP-WATER LINES ........ ........ 544
FLANGE GP-TMSN OIL COOLER ..... ..... 546
LINES GP-TURBOCHARGER WATER ... ... 547
LINES GP-WATER ............ ............ 550
PLUG GP-WATER LINES ......... ......... 572
PUMP GP-WATER ............ ............ 581
RADIATOR GP ............................ 591
VALVE-MANUAL .......................... 628
AIR INLET AND EXHAUST SYSTEM ..... ..... 629
ADAPTER GP-AIR CLEANER ....... ....... 629
ADAPTER GP-AIR INLET ......... ......... 630
AIR CLEANER GP ............ ............ 631
CAP AS-RAIN .............. .............. 648
CONNECTION GP-EXHAUST ....... ....... 652
COVER GP-AIR INLET .......... .......... 657
ELBOW GP-AIR INLET .......... .......... 658
ELBOW GP-EXHAUST .......... .......... 662
ELBOW-EXHAUST ............ ............ 666
FITTING GP-EXHAUST .......... .......... 670
FLANGE GP-EXHAUST .......... .......... 674
KIT-EXHAUST PARTS .......... .......... 679
LINES GP-AIR .............. .............. 680
LINES GP-TURBOCHARGER ....... ....... 714
MANIFOLD GP-EXHAUST ........ ........ 716
MUFFLER ................ ................ 720
MUFFLER GP .............. .............. 721
MUFFLER GP-SPARK ARRESTOR .... .... 724
PIPE GP-EXHAUST ........... ........... 726
PRECLEANER GP ............ ............ 730
SHIELD GP-HEAT ............ ............ 734
SHIELD GP-MANIFOLD .......... .......... 736
SHUTOFF GP-AIR ............ ............ 738
TURBOCHARGER GP .......... .......... 751
FUEL SYSTEM ............... ............... 785
BASE GP-FUEL FILTER .......... .......... 785
COOLER GP-FUEL ........................ 786
FASTENER GP-FUEL LINES ....... ....... 790
FILTER GP-FUEL ............. ............. 792
FILTER GP-WATER SEP & FUEL ..... ..... 795
FITTING GP-FUEL LINES ......... ......... 798
FITTING GP-QUICK DISCONNECT .... .... 800
INJECTOR GP-FUEL ........... ........... 801
LINES GP-FLEXIBLE FUEL ........ ........ 802
LINES GP-FUEL ............. ............. 803
LINES GP-FUEL FILTER ......... ......... 811
MANIFOLD GP-FUEL ........... ........... 863
PUMP & MTG GP-FUEL TRANSFER .... .... 865
PUMP GP-FUEL INJECTION ....... ....... 867
PUMP GP-FUEL PRM & PRIM FILTER ... ... 873
PUMP GP-FUEL PRM & SEC FILTER ... ... 875
PUMP GP-FUEL PRM & WATER SEP ... ... 884
PUMP GP-FUEL TRANSFER ....... ....... 885
VALVE GP-CHECK ............ ............ 886
VALVE GP-FUEL BYPASS ........ ........ 890
ELECTRICAL AND STARTING SYSTEM ... ... 891
ALTERNATOR GP-CHARGING ...... ...... 891
BATTERY GP .............. .............. 925
CABLE GP-BATTERY ...................... 928
CONNECTION GP-ELECTRICAL ..... ..... 930
CONTROL & MTG GP-ENGINE ELEK ... ... 933
CONTROL GP-AUTO START/STOP .... .... 938
CONTROL GP-ENGINE SPEED ...... ...... 942
CONTROL GP-REMOTE SPEED ..... ..... 944
CONVERTER GP-ELECTRICAL ...... ...... 945
FASTENER GP-WIRING HARNESS .... .... 947
FASTENER GP-ENGINE WIRING ..... ..... 948
HARNESS AS-PANEL .......... .......... 951
HARNESS AS-SENSOR ......... ......... 952
HEATER GP-JACKET WATER ....... ....... 954
LUBRICATOR GP-AIR MOTOR ...... ...... 956
MODULE GP-INTERFACE ........ ........ 957
MOUNTING GP-CIRCUIT BREAKER .... .... 958
MOUNTING GP-JACKET WTR
HEATER .................................. 965
MOUNTING GP-SENSOR ......... ......... 969
SENSOR GP-COOLANT LEVEL ...... ...... 971
SENSOR GP-ENGINE .......... .......... 972
SENSOR GP-LIQUID LEVEL ....... ....... 976
SENSOR GP-POSITION ......... ......... 978
SENSOR GP-PRESSURE ......... ......... 979
SENSOR GP-SPEED ........... ........... 986
SENSOR GP-TEMPERATURE ....... ....... 994
SILENCER-AIR STARTING ........ ........ 1002
SOFTWARE GP-ENG RATINGS ELEK ... ... 1003
STARTING AID GP-ETHER ........ ........ 1003
STARTING MOTOR GP-AIR ........ ........ 1006
STARTING MOTOR GP-ELECTRIC .... .... 1018
SUPPORT GP-BATTERY ......... ......... 1046
SWITCH GP-MAGNETIC ......... ......... 1047
SWITCH GP-REMOTE STARTING ..... ..... 1049
SWITCH GP-START ........... ........... 1050
SWITCH GP-TOGGLE .......... .......... 1051
VALVE GP-AIR STARTING ........ ........ 1052
VALVE GP-ETHER STARTING ....... ....... 1054
WIRING GP-ELECTRONIC CONTROL ... ... 1056
WIRING GP-ENGINE ........... ........... 1058
WIRING GP-ENGINE ELECTRONIC .... .... 1077
WIRING GP-SENSOR .......... .......... 1082
WIRING GP-UNIT INJECTOR ....... ....... 1083
A2 TABLE OF CONTENTS SEBP3816-35

TABLE OF CONTENTS
Name Page Name Page
HYDRAULIC SYSTEM ........... ........... 1084
MOUNTING GP-PUMP .......... .......... 1084
PUMP & MTG GP-HYDRAULIC ...... ...... 1086
PUMP GP-HYDRAULIC .......... .......... 1099
PUMP GP-PISTON ............ ............ 1115
ROTATING GP-PUMP ........... ........... 1121
VALVE GP-RELIEF ............ ............ 1122
ENCLOSURES, GUARDS AND BASES ... ... 1123
BASE GP-ENGINE ........................ 1123
PRIME PACKAGE ............. ............. 1124
MOUNTING GP-PUMP .......... .......... 1124
PUMP GP-GEAR .......................... 1126
ROTATING GP-PUMP ........... ........... 1129
VALVE GP-PUMP CONTROL ....... ....... 1133
TRANSMISSION .............. .............. 1135
PUMP GP-CHARGE ........... ........... 1135
OPERATOR STATION ........................ 1136
AMMETER GP .............. .............. 1136
BOX GP-INSTRUMENT PANEL ...... ...... 1137
CONTROL GP-ENGINE MONITORING ... ... 1139
CONTROL GP-UNPRGMED MONITOR ... ... 1140
GAUGE GP-COOLANT
TEMPERATURE ............. ............. 1141
GAUGE GP-ENGINE OIL PRESSURE ... ... 1142
GAUGE GP-FUEL PRESSURE ...... ...... 1143
MODULE GP-DISPLAY .......... .......... 1144
MOUNTING GP-INSTRUMENT PANEL ... ... 1145
MOUNTING GP-TACHOMETER ...... ...... 1154
PANEL GP-INSTRUMENT ......... ......... 1155
PLUG GP-INSTRUMENT PANEL ..... ..... 1178
TACHOMETER GP-ELECTRIC ...... ...... 1181
VOLTMETER GP ............. ............. 1183
SERVICE EQUIPMENT AND SUPPLIES ... ... 1187
ACTUATOR GP-PUMP .......... .......... 1187
CHART-PLATE & FILM .......... .......... 1188
KIT-GASKET .............................. 1189
PLATE GP-ENGINE IDENTIFICATION ... ... 1190
PLATE GP-IDENTIFICATION ....... ....... 1191
PART NUMBER INDEX ........... ........... B1
SEBP3816-35 TABLE OF CONTENTS A3

GENERAL INFORMATION
1. ENGINE IDENTIFICATION
Caterpillar engines are identified with Serial Numbers
and Arrangement Numbers. In some cases, Modification
Numbers are also used. The serial number plate which
shows these numbers is mounted on the engine.
Caterpillar dealers need this information to determine
which components were included on the engine when
it was assembled at the factory. This permits accurate
identification of replacement part numbers.
2. ORDERING PARTS
Quality Caterpillar replacement parts are available from
Caterpillar dealers throughout the world. Their parts
inventories are up to date and include all parts normally
required to protect your investment in Caterpillar
Engines. Dealers may offer repair kits or remanufactured
parts to allow selection of the most effective repair
alternative for a particular situation. When ordering parts,
your order should specify the quantity, part number,
part name, and the serial number/product identification
number of the engine for which the parts are needed.
3. PARTS MANUAL ORGANIZATION
Product information in this manual is presented
as "information elements" that represent all of the
components for the specific model. An Engine
Arrangement is an example of an information element.
The information elements are organized alphabetically
by part name and secondarily by part number within
each major section of the manual.
4. TABLE OF CONTENTS
A table of contents (TOC) is found at the beginning of the
manual. The TOC lists each section of the manual with
a complete list of all information elements organized as
they appear in the manual. Page numbers are provided
for quick reference to detailed parts identification
illustrations and serviceable consist lists.
5. MAINTENANCE PARTS INDEX
The Maintenance Parts Index, located near the
beginning of the manual, references most frequently
used maintenance part numbers, providing description,
quantity, usage and page number. This information is
organized alphabetically by part description.
6. INDEX
The index located near the front of the manual is an
alphabetical listing of all information elements included
in the manual. Page numbers are provided for quick
reference to detailed parts identification illustrations and
serviceable consist lists.
7. PART NUMBER INDEX
A numerical index listing all part numbers and the
corresponding page number(s) appears at the back of
the manual.
8. CAPTIONS
Captions located at the beginning each information
element identify the part number and part name
along with additional descriptive information. S/N
information found in each caption should be used
to select correct information for a specific engine.
Field replacement options, identification of optional
attachment components, and where used ("part of")
information is also provided.
The first line of a caption is shown in larger type font
to indicate the beginning of an information element.
Captions for additional pages that may be required
to illustrate an information element will be shown in
standard type font and will include the term (contd.) .
9. NON-SERVICED PARTS
In some instances it is necessary to display non-serviced
parts that are a link to lower level serviceable consist lists.
These non-serviced part numbers are shown in italic type
indicating that they are not available. All consist lists have
not been converted to reflect this enhancement.
A4 GENERAL INFORMATION SEBP3816-35

GENERAL INFORMATION
10. PARTS LIST REFERENCE NUMBERS
Numbers shown in the Ref No column correspond
to numbers used in the associated graphic(s). An
alphabetic suffix may be added to a reference number to
identify lower level consist items. Numbers shown in the
Graphic Ref column refer to the graphic number identifier
displayed in the lower left corner of each illustration. The
Graphic Ref number may be used in combination with
the item Ref No to determine the correct part number.
There may be intentional omission of a Ref No in a
consist list as information is updated to reflect the latest
serviceable part numbers.
11. INDENTED PART NAMES
When a part name is indented in a parts list, it is part
of (included in) the group or assembly under which it is
indented.
12. ILLUSTRATION REFERENCE LETTERS
When necessary, illustrations contain reference letters
(A, B, C etc.) that are intended to track lines and
harnesses from one point to another. They are also used
to show where to reconnect illustrations that have been
separated.
13. ABBREVIATIONS AND SYMBOLS
O.D. – Outside Diameter
I.D. – Inside Diameter
A – Not Part Of This Group
B – Use As Required
C – Change From Previous Type
D – Order By The Meter
E – Order By The Centimeter
F – Not Shown
G – Order By The Inch
I – Refer To Hydraulic Information System
M – Metric Part
R – Remfg Part May Be Available
Y – Separate Illustration
Z – Not Serviced Separately
14. DESCRIPTION OF TYPE CHANGES
Type - A type is defined as any configuration change
that requires an additional Information Element for an
Arrangement, Group, or Assembly. If serial number
breaks for types are not available, a type # ( Type 1,
Type 2, etc.) will be displayed in the caption. These
"type" changes are identified with a "C" note (change
from previous type) in the Parts List. Only the "types" that
apply to this Parts Manual will be included. Additional
types may exist causing "C" notes to appear on an
Information Element when no other types are shown.
15. <END>
This symbol indicates the end of an information element.
NOTE:
Continuing improvement and advancement of
product design may cause changes to your engine
which may not be included in this publication.
Whenever a question arises regarding your
Caterpillar product or this publication, please
consult your Caterpillar dealer for the latest available
information.
SEBP3816-35 GENERAL INFORMATION A5

REPAIR ALTERNATIVES
REMANUFACTURED COMPONENTS
As an option when making repairs consider Caterpillar Remanufactured Components. Components that are available
through the Caterpillar Remanufactured Program are identified three ways in the parts book:
• with the letter R in the note field of the parts list
• with an R* at the beginning of the first line of the caption
• with an *R at the end of the first line of the caption
Typical components included in the Remanufacturing Program include:
ALTERNATORS
CONNECTING RODS
CRANKSHAFTS - UNDERSIZE
CRANKSHAFTS - UPGRADE TO NEW
CYLINDER HEADS
ELECTRONIC CONTROL MODULES (ECM)
ELECTRONIC SENSORS
FUEL INJECTORS
FUEL NOZZLES
FUEL PUMPS
GOVERNORS
OIL PUMPS
PISTONS
SHORT BLOCKS
STARTERS
TURBOCHARGERS - COMPLETE
TURBOCHARGER CARTRIDGES
WATER PUMPS
Caterpillar Remanufactured engines for many engine arrangements are also available.
A6 REPAIR ALTERNATIVES SEBP3816-35
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This parts manual is for the Cat C18 genset, spanning 425 pages. It covers the C18 engine with serial number ELM1 and up, as well as generator serial numbers within the ranges L6B1-UP, L7A1-UP, LNB1-UP, and LZB1-UP. This manual is valuable for both professional mechanics and DIY enthusiasts.