Caterpillarengine - industrialindustrial engine

Caterpillar D342C

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar D342C is a heavy-duty diesel engine designed for high-demand industrial, construction, marine, and power generation applications. This 6-cylinder turbocharged unit provides 300 hp (224 kW) of flywheel power and is frequently integrated into machines such as the D8K crawler dozer. The engine series has been utilized in various configurations, including industrial power units and marine propulsion systems, with production documented between 1988 and 200 and 6 years.

Across its service life, the D342C has maintained a reputation for durability under extreme working conditions. In today's used parts and secondary market, this engine remains highly relevant due to its mechanical reliability and widespread compatibility with established Caterpillar chassis. Maintaining strict adherence to the tiered PM1 through PM4 maintenance structure is critical for preserving component life and preventing high-cost emergency repairs in mining and earthmoving fleets.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.

Caterpillar D342C specifications

Engine

ModelD342 / D342C
Net Power300 hp (224 kW)
Cylinders6
AspirationTurbocharged

Weights

Engine Weightapproximately 7,800 lbs (3,538 kg)

Dimensions

Blade Width13 ft (3.96 m)
Length with Blade22 ft (6.71 m)

Performance

Flywheel Horsepower300 hp
Power RetentionMaintains full rated power up to 7,500 ft (2,300 m)

Service capacities (summary)

Engine OilCat DEO, Cat DEO-ULS
CoolantCat ELC (Extended Life Coolant)
Hydraulic FluidCat HYDO Advanced

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

D342C fluids & capacities

SystemCapacityRecommended fluid
engine crankcase (with filter)not specifiedCat DEO or Cat DEO-ULS; use SAE 10W-30 for ambient temperatures between -18°C (0°F) and 40°C (104°F). Use higher viscosity if cold start requirements dictate.
cooling systemnot specifiedCat ELC (Extended Life Coolant)
transmission/powertrain compartmentsnot specifiedCat TDTO (Transmission/Drive Train Oil)
final drives (each)not specifiedCat TDTO
hydraulic system and tanknot specifiedCat HYDO Advanced 10 (for cold to moderate temperatures) or Cat HYDO Advanced 30 (for moderate to hot temperatures)
grease (spec only)not specifiedCat Multipurpose Grease, Cat Advanced 3Moly Grease, Cat Ultra 5Moly Grease, Cat Desert Gold Grease (hot-weather), or Cat Arctic Platinum Grease (cold-weather)

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar D342C maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and condition
  • Inspect hydraulic fluid level via sight glass
  • Verify coolant level and cap integrity
  • Drain water from fuel water separator
  • Check air filter restriction indicator
  • Inspect for external fluid leaks
Every 250 h
  • Change engine oil and filter
  • Grease all machine pivot points
  • Perform visual inspection of components
  • Check air filter primary element
  • Drain fuel water separator
Every 500 h
  • Replace fuel filters
  • Replace hydraulic return filter
  • Perform battery service and terminal check
  • Conduct detailed undercarriage inspection
  • Test coolant SCA levels
Every 1,000 h
  • Perform hydraulic oil sample analysis (S.O.S)
  • Service final drive oil
  • Inspect turbocharger for wear
  • Check ROPS bolt torque
  • Measure undercarriage wear
Every 2,000 h
  • Change hydraulic system oil
  • Perform coolant flush and replacement
  • Service transmission system
  • Conduct comprehensive structural inspection
  • Evaluate major components

Servicing the D342C beyond the schedule

Predictive Maintenance & Fluid Analysis

Utilize Caterpillar S.O.S Services to monitor engine oil, hydraulic fluid, and coolant for wear metals like iron or copper. Analyze samples for silicon (dirt ingestion) or sodium (coolant leaks). For hydraulic systems, track particle counts and viscosity changes. Regular analysis of transmission and final drive oil prevents catastrophic gear failure by detecting early signs of degradation before they impact machine uptime.

Corrective & Common Repairs

Monitor for milky engine oil, which indicates coolant contamination and potential head gasket failure. Address hydraulic pump cavitation immediately if low fluid levels are detected. When replacing radiator caps, ensure they meet factory specifications to maintain cooling system pressure. For turbocharger issues, inspect for excessive smoke or abnormal noise during operation to prevent downstream engine damage.

Overhaul & Rebuild Points

Plan major component evaluations during PM4 intervals. Critical rebuild indicators include significant undercarriage wear requiring sprocket or roller replacement, and structural weld inspections on booms or sticks. Monitor cylinder head casting numbers for interchangeability when performing top-end repairs. For heavy-duty applications, evaluate turbocharger and final drive components for fatigue to avoid unplanned engine or drivetrain overhauls.

Seasonal & Environment Servicing

In high-dust or quarry environments, check air filters daily and consider replacing them at 500 hours instead of the standard interval. Clean radiator and oil cooler fins frequently to prevent overheating. For cold-weather operations, utilize Cat DEO-ULS Cold Weather engine oil (SAE 0W-40) to ensure proper lubrication. In hot climates, shorten intervals for hydraulic oil drains to mitigate thermal oxidation.

D342C common service parts

Part numberPart
8M-3120Element --Starting Engine Air CleanerCheck fitment →
2L-8848Bolt- Oil Filter DrainCheck fitment →
2L-8986Tube Assembly -Oil Filter DrainCheck fitment →
8H-4973Oil Filter AssemblyCheck fitment →
1S-0372Oil Filter AssemblyCheck fitment →

Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.

D342C fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
110-3Engine Coolant Temperature Sensor — Voltage HighOpen circuit or sensor failureCheck wiring; replace sensor if confirmed faulty
174-3Engine Fuel Temperature — Voltage Above NormalOpen circuit in sensor wiringInspect harness and replace sensor if necessary
190-8Engine Speed — Abnormal FrequencySpeed sensor air gap, sensor failure, or tone ring damageCheck sensor gap; test speed sensor and tone ring
41-38-Volt DC Supply — Voltage Above NormalShort to power on 8V reference circuitInspect sensors sharing the 8V supply and isolate fault
41-48-Volt DC Supply — Voltage Below NormalShort to ground on 8V reference circuitDisconnect sensors one at a time to locate short
2348-9SAE J1939 Data Link #2 — Abnormal Update RateCAN bus wiring damage or termination faultCheck CAN wiring and measure termination resistance
E360Engine Coolant Temperature — HighLow coolant, failed thermostat, or water pump issueDiagnose cooling system; do not operate until resolved
E361Engine Coolant Temperature — Very High (Shutdown)Severe cooling system failureEngine shutdown required; perform full cooling system diagnosis

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

D342C attachments & work tools

Blades and Earthmoving Attachments

Available configurations include 8S semi-U blades with hydraulic tilt and 6-way pat blades. Options for bolt-on cutting edges are also offered for increased durability.

Ripper Systems

The machine supports various ripper configurations, including single shank 4 bbl rippers and No. 8 Series D Rippers. Some units feature a single tooth ripper setup.

Mounting and Coupler Systems

Equipment may be equipped with removable couplers for enhanced versatility. Certain configurations also include a rigid drawbar.

Hydraulic and Control Arrangements

Attachments are supported by hydraulic controls, including blade tilt cylinders (8S and 8U). Systems may feature hydraulic extendable counterweights and advanced hydraulic systems for improved performance.

Factory Configurations and Guarding

Notable factory options include heavy-duty brush or forestry guarding. Standard configurations may also include ROPS canopies, suspension seats, and dual winch setups for sideboom applications.

All D342C assemblies by section

Every catalogued assembly group for the Caterpillar D342C. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Attachments
6l2450 Air Cleaner Group--2 Stage Heavy Duty--Type 1
4l4720 Air Cleaner Group
5l1800 Air Cleaner Group--2 Stage--Field Installation--Type 3
5l1800 Air Cleaner Group--2 Stage--Field Installation--Type 2
5l1800 Air Cleaner Group--2 Stage--Field Installation--Type 1
6l2450 Air Cleaner Group--2 Stage Heavy Duty--Type 2
5l4214 Air Filter Indicator Group
7l7413 Air Filter Indicator Group
5l2130 Air Filter Indicator Group
7l6784 Air Filter Indicator Group
5l1406 Air Filter Indicator Group
4l3738 Air Inlet Shut-Off Arrangement
3L***15Air Inlet Shut-Off Group1
4L***37Water Temperature Shut-Off Group1
4L***38Air Inlet Shut-Off Arrangement1
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3l8115 Air Inlet Shut-Off Group--Type 3
3l8115 Air Inlet Shut-Off Group--Part 1 Of 2--Type 1
3l8115 Air Inlet Shut-Off Group--Part 2 Of 2--Type 1
3l8115 Air Inlet Shut-Off Group--Type 2
6l2905 Air Inlet-Water Temperature Oil Pressure And Overspeed
3L***15Air Inlet Shut-Off Group1
6L***04Water Temperature Safety Shut-Off Group; Water Temperature Shut-Off Group. Shown Below1
6L***05Air Inlet-Water Temperature Oil Pressure And Overspeed1
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3l517 Air Motor--Type 1
3l517 Air Motor--Type 2
1l7415 Air Motor Unit Assembly
6n3789 Air Motor Group
6n2449 Air Starting Motor Group
1l6977 Air Starting Motor Group--15 H.P.--Type 2
7l8248 Air Starting Motor Group--18 H.P.
7L***48Air Starting Motor Group; Air Starting Motor Group (18 H.P.)1
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1l6977 Air Starting Motor Group--15 H.P.--Type 1
5l5565 Air Starting Motor Group--15 H.P.--Type 2
5L***65Air Starting Motor Group; Air Starting Motor Group (15 H.P.)1
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5l5565 Air Starting Motor Group--15 H.P. - Type 1
5L***65Air Starting Motor Group; Air Starting Motor Group (15 H.P.)1
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4l1262 Air Starting System Arrangement--15 H.P.
1L***77Air Starting Motor Group0
3L***66Fuel Priming Pump Group0
4L***62Air Starting System Arrangement1
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5l5560 Air Starting System Arrangement--15 H.P.
3L***66Fuel Priming Pump Group1
5L***60Air Starting System Arrangement1
5L***65Air Starting Motor Group; Air Starting Motor Group (15 H.P.)1
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1n9406 Alternator Assembly--32 Volt, 50 Ampere--Part 1 Of 2--Type 1
2n6397 Alternator Assembly--24 Volt, 35 Ampere
2N***97Alternator As; Alternator Assembly1
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1n9406 Alternator Assembly--32 Volt, 50 Ampere--Part 1 Of 2--Type 2
1n9406 Alternator Assembly--32 Volt, 50 Ampere--Part 2 Of 2--Type 2
2n6398 Alternator Assembly--24 Volt, 35 Ampere
1n9406 Alternator Assembly--32 Volt, 50 Ampere--Part 2 Of 2--Type 1
3n1381 Alternator Assembly--24 Volt--Field Installation
1H***87Screw-Machine; (10-24x0.438-In)3
2N***80Harness As-Wiring; (Alternator)1
2N***98Alternator As1
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3n1380 Alternator Assembly--24 Volt--Field Installation
2N***80Harness As-Wiring; (Alternator)1
2N***97Alternator As; Alternator Assembly1
2N***79Regulator Assembly1
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8l5003 Alternator Assembly--24 Volt, 35 Ampere
3n2391 Alternator Group--32 Volt, 50 Ampere--Type 2
3n7683 Alternator Group--24 Volt, 60 Ampere
4n3987 Alternator Group--32 Volt, 60 Ampere--Side View - Part 1 Of 2
4N***87Alternator Group; Alternator Group1
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3n2391 Alternator Group--32 Volt, 50 Ampere--Type 1
1n8372 Alternator Group--24 Volt, 35 Ampere--Type 2
1n8447 Alternator Group--24 Volt, 50 Ampere
4n3987 Alternator Group--32 Volt, 60 Ampere--End View - Part 2 Of 2
4N***87Alternator Group; Alternator Group1
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1n8372 Alternator Group--24 Volt, 35 Ampere--Type 1
3n7684 Alternator Group--30-32 Volt, 60 Ampere
1n8372 Alternator Group--24 Volt, 35 Ampere--Type 3
4n3986 Alternator Group--24 Volt, 60 Ampere--End View - Part 2 Of 2
4N***86Alternator Group-Charging; (24-Volt, 60-Ampere)(24-Volt, 60-Ampere)1
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5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 1
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 2
5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 1 Of 2--Type 1
3n5680 Alternator Group--24 Volt, 35 Ampere
4n3986 Alternator Group--24 Volt, 60 Ampere--Side View - Part 1 Of 2
4N***86Alternator Group-Charging; (24-Volt, 60-Ampere)(24-Volt, 60-Ampere)1
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5s9088 Alternator Assembly--24 Volt, 50 Ampere--Part 2 Of 2--Type 2
3n5673 Alternator Mounting Group
3n8359 Alternator Mounting Group
4l3511 Automatic Start-Stop Arrangement--24 Volt--Type 2
4L***11Automatic Start-Stop Arrangement1
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4l3511 Automatic Start-Stop Arrangement--24 Volt--Type 1
4L***11Automatic Start-Stop Arrangement1
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6l8554 Automatic Start-Stop Arrangement--24 Volt
1H***66Clip-Wire Provides Loose Parts6
2H***43Marker (Wire Code)1
2L***75Terminal; (14-Ga To 16-Ga, No. 8 Screw)(Relay Switch "B" & "S")2
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5l8042 Automatic Start-Stop Arrangement--24 Volt
1B***18Washer; (25/64 X 5/8 X .064in Thk)1
1H***66Clip-Wire Provides Loose Parts6
2A***20Plug-Drain; (Front Housing)1
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3l9215 Auxiliary Drive Group
1l6515 Auxiliary Drive Group
3l9125 Auxiliary Drive Group
1l6219 Auxiliary Water Pump Group--Rubber Impeller
3l8491 Base And Fuel Tank Group--Extended Base--Type 1
7l6562 Base And Fuel Tank Group--Type 1
2l8628 Base And Fuel Tank Group
3l8491 Base & Fuel Tank Group--Extended Base--Type 2
2l8753 Base And Fuel Tank Group--Short--Type 2
7l6562 Base And Fuel Tank Group--Type 2
2l8753 Base And Fuel Tank Group--Short--Type 1
7l7872 Battery Group--24 Volt, 220 Ampere Hours
7l7871 Battery Group--24 Volt, 172 Ampere Hours
7L***71Battery Group; (24-Volt)(24-Volt)1
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9f6028 Battery Group--24 Volt, 170 Ampere Hours
7l7870 Battery Group--24 Volt, 120 Ampere Hours
1l5664 Battery Group--24 Volt, 120 Ampere Hours
1h1341 Battery Group--24 Volt, 200 Ampere Hours
3l7436 Blower Fan, Drive And Guard Group--29 Inch--6 Blade
3L***36Blower Fan Drive And Guard Group1
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5l8540 Blower Fan, Drive And Guard Group--26 1/2 Inch--6 Blade
5L***40Blower Fan Drive And Guard Group1
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3l7433 Blower Fan, Drive And Guard Group--26 1/2 Inch--6 Blade
3L***33Blower Fan Drive And Guard Group1
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5l8538 Blower Fan, Drive And Guard Group--29 Inch-6 Blade
5L***38Blower Fan Drive And Guard Group1
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2l274 Cabinet Assembly--24 Volt
2L***74Cabinet Assembly; Automatic Start-Stop Cabinet Assembly1
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Camshaft And Governor
Camshaft And Governor (9m9923 N/S)
6l2529 Carburetor And Air Transfer Pipe Group
6L***29Carburetor And Air Transfer Pipe Group1
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7m6038 Carburetor
9h6181 Carburetor Assembly
8l3915 Centrifugal Pump Assembly--Raw Water
6l4040 Hydraulic Starting System
1S***11Tag1
2L***33Hydraulic Gauge1
2L***37Filter-- High Pressure1
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4l3524 Clutch Assembly--Type 2
4l3524 Clutch Assembly
2n6962 Clutch Assembly
6l8508 Clutch Assembly
2n6963 Clutch Assembly
9h4826 Clutch Group
5h6017 Clutch Group
6l8512 Enclosed Clutch Group--Type 1
6l8512 Enclosed Clutch Group--Type 2
Connecting Rod And Piston (8f2738 N/S)--2 Required
Connecting Rod And Piston (8m2572 N/S)--2 Required
8l5255 Contactor Group
5l8041 Contactor Group
5l2742 Alarm Contactor Group--Type 1
5L***42Contactor Group-Alarm; Safety Alarm Contactor Group1
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5l2742 Alarm Contactor Group--Type 2
5L***42Contactor Group-Alarm; Safety Alarm Contactor Group1
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3n4948 Overspeed Safety Contactor Group
3n6383 Overspeed Contactor Group
5l3693 Governor Control Group--Remote Mounted
7f5437 Generator Drive Coupling Group
7F***37Coupling Group; Generator Drive Coupling Group1
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Crankshaft (9h6218 N/S)
Crankshaft (8m2574 N/S)
Cylinder Block, Cylinder Head And Valve Mechanism--Part 2 Of 2
Cylinder Block, Cylinder Head And Valve Mechanism--Part 1 Of 2
Cylinder Block, Cylinder Head And Valve Mechanism (6l2530 N/S)--Part 2 Of 2
6L***30Cylinder Block, Cylinder Head And Valve Mechanism1
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Cylinder Block, Cylinder Head And Valve Mechanism (6l2530 N/S)--Part 1 Of 2
6L***30Cylinder Block, Cylinder Head And Valve Mechanism1
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1l6987 Deep Oil Pan Arrangement
1L***86Deep Oil Pan Group1
1L***87Deep Oil Pan Arrangement1
1S***81Oil Pump Assembly1
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1l6986 Deep Oil Pan Group--Type 2
1l6986 Deep Oil Pan Group--Type 1
1m5061 Tachometer Drive Group
4l5789 Tachometer Drive Group
2n1273 Exhaust Elbow Group--90 Degrees Bend--5 Inch
5l7661 Exhaust Elbow Group--5 Inch
5L***61Elbow Group-Exhaust; Exhaust Elbow Group1
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7l447 Exhaust Elbow Group--90 Degrees Bend--6 Inch
6l4665 Electric Motor Assembly--12 Volt
6h4260 Electric Starter Group--6 Volt
1A***29Bolt (1-1/8") Tube Assembly To Transfer Drive Case2
3B***06Washer,Lock; Flange,Elbow,Clamp Assembly,Tube To Pump,Tube Assembly To Screen,Clip Mounting,And Tube Assembly To Transmission2
6H***60Electric Starter Group1
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5l5572 Electric Starting Arrangement--24 Volt
3L***66Fuel Priming Pump Group1
5L***71Starting Motor Group-Electric; Electric Starting Motor Group1
5L***72Electric Starting Arrangement1
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3l8476 Electric Starting Arrangement--24 Volt
1l6100 Electric Starting Group--6 Volt
1L***90Wiring Assembly -Starting Switch To Motor1
1L***00Electric Starting Group1
3F***06Switch; (Elec. Horn)1
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1l6448 Electric Starting Group--12 Volt--Type 1
2l1704 Electric Starting Group--12 Volt
6l5978 Electric Starting Group--12 Volt
1l6448 Electric Starting Group--12 Volt--Type 2
3l2393 Electric Starting Motor--12 Volt
5l4928 Electric Starting Motor Assembly--24 Volt--Type 2
5L***28Electric Starting Motor Assembly1
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6l1619 Electric Starting Motor Assembly--12 Volt
6L***19Electric Starting Motor Assembly1
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8l8205 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2
8L***05Electric Starting Motor Assembly1
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5l4928 Electric Starting Motor Assembly--24 Volt--Type 1
5L***28Electric Starting Motor Assembly1
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8l8205 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2
8L***05Electric Starting Motor Assembly1
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5l4927 Electric Starting Motor Group--24 Volt
5l4927 Electric Starting Motor Group--24 Volt--Type 2
3l8421 Electric Starting Motor Group--24 Volt
4l1689 Electric Tachometer Group
7l3084 Electric Tachometer Group--24 Volt
5L***45Tachometer Assembly 24 Volt Or 32 Volt1
5L***52Sending Unit Assembly 12 Or 24 Volt1
7L***84Electronic Tachometers; Electric Tachometer Group 24 Volt1
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7l3083 Electric Tachometer Group--12 Volt
5L***34Tachometer Assembly --12 Volt1
5L***52Sending Unit Assembly 12 Or 24 Volt1
7L***83Electronic Tachometers; Electric Tachometer Group 12 Volt1
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6l8513 Enclosed Clutch And Pillow Block Group--Type 2
6L***13Enclosed Clutch And Pillow Block Group1
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6l8513 Enclosed Clutch And Pillow Block Group--Type 1
6L***13Enclosed Clutch And Pillow Block Group1
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4l3522 Enclosed Clutch Group--Pillow Block
5l1375 Enclosed Clutch Group
4l3523 Enclosed Clutch Group
5l1376 Enclosed Clutch Group--Pillow Block
1l4842 Enclosed Clutch Group--Short Shaft
7h1604 Support Group
2l774 Exhaust Fitting Group
6l2891 Expansion Tank Group-Type 2
6l2891 Expansion Tank Group - Type 1
Fan And Radiator Chart
2n2048 Crude Fuel Filter Group
8h4681 Primary Fuel Filter Group
8H***81Filter Group-Primary Fuel; Primary Fuel Filter Group1
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3n3016 Vertical Exhaust Fitting Group--5 Inch
5l9377 Exhaust Fitting Group--5 Inch
5L***77Fitting Group-Exhaust; Exhaust Flange Group1
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2l30 Flexible Coupling Group
9f7459 Flexible Coupling Group
4h1904 Flexible Fuel Line Group
1l4841 Flywheel Clutch Assembly--Type 3
1l4841 Flywheel Clutch Assembly--Type 2
1l4841 Flywheel Clutch Assembly--Type 1
1l9900 Flywheel Stub Shaft Group
3l8466 Fuel Priming Pump Group--Type 2
3l8466 Fuel Priming Pump Group--Type 1
3l7736 Fuel System Group
6l2579 Fuel System Group
Gasoline Starting Engine Arrangement
3l8511 Gauge Group--R.H.
5l9895 Instrument Group--24 Or 32 Volt
5L***95Gauge Group; -Engine Oil Pressure, Water Temperature1
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3l8512 Gauge Group--L.H.--Type 1
5l9894 Instrument Group--12 Volt
5L***94Gauge Group; -Oil Pressure, Water Temperature1
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3l8512 Gauge Group--R.H. Or L.H.--Type 2
2n3322 Air Filter Indicator Group
2N***22Gauge Group-Air Cleaner; Air Filter Indicator Group1
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6f9461 Generator--12 Volt, 40 Ampere
9f5014 Generator--12 Volt, 10 Ampere
4l9957 Generator--12 Volt, 14 Ampere
8h1956 Generator Assembly--24 Volt, 18 Ampere
8f3334 Generator--6 Volt, 18 Ampere
8h1963 Generator Assembly--6 Volt, 40 Ampere
8h5880 Generator--24 Volt, 15 Ampere
1l9668 Generator Arrangement--12 Volt, 40 Ampere
1L***15Auxiliary Drive Group0
1L***67Generator Group0
1L***68Generator Arrangement1
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6l5049 Generator Assembly--24 Volt, 15 Ampere
2m6664 Generator Assembly--6 Volt, 40 Ampere
1s1420 Generator Assembly--12 Volt, 24 Ampere
5l1466 Generator Drive Coupling Group--Type 1
5l1466 Generator Drive Coupling Group--Type 2
2l6517 Generator Drive Coupling Group
7l5713 Generator Drive Coupling Group
1l9677 Generator Group--24 Volt, 18 Ampere--Type 2
1l9677 Generator Group--24 Volt, 15 Ampere--Type 3
1l9675 Generator Group--6 Volt, 18 Ampere
1l9676 Generator Group--6 Volt, 40 Ampere--Type 2
1l9667 Generator Group--12 Volt, 40 Ampere
1l9676 Generator Group--6 Volt, 40 Ampere--Type 1
1l9664 Generator Group--12 Volt, 14 Ampere--Type 3
1l9664 Generator Group--12 Volt, 10 Ampere--Type 1
1l9677 Generator Group--24 Volt, 18 Ampere--Type 1
1l9664 Generator Group--12 Volt, 24 Ampere--Type 4
1l9664 Generator Group--12 Volt, 10 Ampere--Type 2
4l3267 Generator Installation Arrangement--Single Bearing
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine16
1H***40Transfer; Safety On Dash Or Guards When Used1
2D***30Transfer (Series "C")2
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7l5714 Generator Installation Arrangement
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine16
1B***02Nut (.3125" Diameter); Nut-- Generator Line Leads8
2H***37Bolt 1.59 cm(.625 In.) Long; Bolt-- Generator Line Leads8
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4l5863 Generator Installation Group-Airflex Coupling - 2 Bearing
4H***04Flexible Fuel Lines Group1
4L***95Cap As-Air Cleaner; Air Cleaner Stack Cap Group1
4L***63Generator Installation Group1
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5l6942 Glow Plug Group--24 Volt--Type 3
5l6942 Glow Plug Group--24 Volt--Type 4
3l8424 Glow Plug Group--24 Volt--Type 2
3l8424 Glow Plug Group--24 Volt--Type 3
3l8424 Glow Plug Group--24 Volt--Type 1
5l6942 Glow Plug Group--24 Volt--Type 1
5l6942 Glow Plug Group--24 Volt--Type 2
5l6942 Glow Plug Group--24 Volt--Type 5
3l8244 Governor--Part 2 Of 2
3l8244 Governor--Part 1 Of 2
Governor Control Chart
3l8869 Governor Control Group--Positive Locking--R.H.
3L***69Governor Control Group; Governor Control Group Between 72 & 731
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3l8868 Governor Control Group--Vernier--L.H.
3l8864 Governor Control Group--Single Cable--L.H.
3l8863 Governor Control Group--Single Cable--R.H.
3l8867 Governor Control Group--Vernier--R.H.
3l8870 Governor Control Group--Positive Locking--L.H.
4l9582 Governor Control Mounting Group--L.H.
4L***82Governor Control Mounting Group--L.H.1
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4l6484 Governor Conversion Group--3% Regulation At 900 R.P.M.
4l6865 Governor Conversion Group--10% Regulation At 1300 R.P.M.
8l8919 Woodward Governor Group
4l7604 Control Handle Group
4L***04Handle Group-Control; Governor Control Handle Group1
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2l4763 Heat Exchanger Assembly
5l6443 Heat Exchanger Assembly--Type 2
3l9099 Heat Exchanger Assembly
5l6443 Heat Exchanger Assembly--Type 1
3n8777 Heat Exchanger Group--Sea Water
3n7992 Heat Exchanger Group--Sea Water
3N***92Heat Exchanger Group; Heat Exchanger Group High Capacity1
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3n7990 Heat Exchanger Group--Sea Water
3n8775 Heat Exchanger Group--Sea Water
3l8522 Hood And Dash Group--Type 1
3l8522 Hood And Dash Group--Type 2
3l8415 Hood Side Door Group
6l4033 Hydraulic Starting Hardware Group--Type 2
6L***33Hydraulic Starting Hardware Group1
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6l4033 Hydraulic Starting Hardware Group--Type 3
6L***33Hydraulic Starting Hardware Group1
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6l4033 Hydraulic Starting Hardware Group--Type 1
0L***51Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold3
0L***52Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex)1
0S***88Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter3
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9h6206 Ignition System Group
7m7143 Ignition System Group
4l4471 Ignition System Group
3l3819 Instrument Panel Group--Type 1
3l3819 Instrument Panel Group--Type 2
5l6689 Junction Box Group
1l6130 Junction Box Group
4l4984 Ether Starting Aid Kit
5f7739 Magnetic Switch--24 Volt
7m4291 Magnetic Switch Assembly--24 Volt
3s2987 Magneto Assembly
9h6374 Magneto Assembly
5m6374 Magneto Assembly
7m4700 Magneto Assembly
8m9145 Magneto Assembly--Replaces 7m4700
5m2850 Magneto Assembly
1s3350 Magneto Assembly
3l9693 Manifold, Carburetor And Air Cleaner Group
3L***93Manifold Carburetor And Air Cleaner Group1
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6l2890 Manifold Group--Water Cooled--Type 1
3l8068 Manifold Group--Water Cooled
6l2890 Manifold Group--Water Cooled--Type 2
4l4503 Manual And Remote Shut-Off Group
4L***03Manual And Remote Shut-Off Group1
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4l7648 Manual Shut-Off Group
4l7648 Manual Shut-Off Group--Type 2
9m7894 Manual Starting Crank Group
Mechanical Tachometer
3M***66Tachometer1
5L***75Flexible Shaft-- 15 Foot; Flexible Shaft --15 Foot1
5L***64Drive Group-Tachometer1
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5l5566 Motor Assembly
9h4699 Motor Assembly--6 Volt
7l8423 Motor Assembly
7h1687 Motor Assembly--6 Volt
1l4507 Electric Starting Motor--24 Volt
4l1769 Mounting And Drive Group--Type 3
4l1769 Mounting And Drive Group--Type 2
4l1769 Mounting And Drive Group--Type 1
4l1769 Mounting And Drive Group--Type 4
7l4535 Tachometer Mounting Group
7L***35Mounting Group-Tachometer; Tachometer Mounting Group[[751
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9h6165 Oil Lines Group
9H***65Oil Line Group; Oil Lines Group1
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2h7664 Oil Pump Assembly--Type 1
9m1713 Oil Pump Assembly
4h8758 Oil Pump Assembly
2h7664 Oil Pump Assembly
1s4381 Oil Pump Assembly
2h7664 Oil Pump Assembly--Type 2
2n4673 Overspeed Safety Contactor Group
2N***73Overspeed Safety Contactor Group1
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7l7366 Overspeed Safety Contactor Group
7L***66Overspeed Safety Contactor Group1
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3n6384 Overspeed Safety Contactor Group
3N***84Overspeed Safety Contactor Group1
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5l8632 Exhaust Pipe Group--5 Inch
3n7679 Glow Plug Group--24 Volt
3n7680 Glow Plug Group--32 Volt
3l2212 Governor Control Group--Remote--Positive Locking
3L***12Positive Locking Governor Control Group1
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4l8383 Precleaner Group--16 Inch
4l8382 Precleaner Group--12 Inch
3l9879 Precleaner Group
5l4157 Precleaner Group--Type 2
5l4157 Precleaner Group--Type 1
3l8402 Primary Fuel Filter Group--Type 3
3l8402 Primary Fuel Filter Group--Type 4
3l8402 Primary Fuel Filter Group--Type 1
3l8402 Primary Fuel Filter Group--Type 2
2s308 Fuel Priming Pump Assembly
3h3512 Raw Water Pump Assembly--Rubber Impeller--Type 1
3h3512 Raw Water Pump Assembly--Rubber Impeller--Type 2
4l3739 Rack Shut-Off Arrangement
3L***22Safety Control Shut-Off Group1
4L***37Water Temperature Shut-Off Group1
4L***39Rack Shut-Off Arrangement1
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6l2906 Rack-Water Temperature Oil Pressure And Overspeed
3L***22Safety Control Shut-Off Group1
6L***04Water Temperature Safety Shut-Off Group; Water Temperature Shut-Off Group. Shown Below1
6L***06Rack-Water Temperature Oil Pressure And Overspeed1
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2l8996 Radiator Assembly
3l6357 Radiator Assembly
4l7120 Radiator Group--Side View
3l6575 Radiator Group--Side View
Rear Engine Support (5h2642 N/S)
2m864 Regulator--12 Volt, 14 Ampere
4f148 Regulator--12 Volt, 10 Ampere
1l3467 Regulator--12 Volt, 40 Ampere
9h6324 Regulator Assembly--24 Volt, 18 Ampere
1m2381 Regulator--6 Volt, 18 Ampere
9h6316 Regulator Assembly--6 Volt, 40 Ampere
7m3962 Regulator Assembly--6 Volt, 20 Ampere--Replaces 1m2381
8h5875 Regulator--24 Volt, 15 Ampere
8m8809 Regulator Assembly--12 Volt, 24 Ampere
1l5658 Safety Alarm Group
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 2 Of 2--Type 3
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 1 Of 2--Type 3
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 1 Of 2--Type 2
3l5822 Safety Control Shut-Off Group--Fuel Rack
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 2 Of 2--Type 1
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 1 Of 2--Type 1
3l5822 Safety Control Shut-Off Group--Fuel Rack--Part 2 Of 2--Type 2
3l5822 Safety Control Shut-Off Group--Fuel Rack--Type 4
6l2694 Stub Shaft Group--Rear Mounted
5l1498 Oil Pressure And Overspeed Housing Group--Part 2 Of 2--Type 3
5l1498 Oil Pressure And Overspeed Housing Group--Part 1 Of 2--Type 3
5l1498 Oil Pressure And Overspeed Housing Group--Part 1 Of 2 - Type 1
5l1498 Oil Pressure And Overspeed Housing Group--Part 2 Of 2 - Type 1
5l1498 Oil Pressure And Overspeed Housing Group--Part 1 Of 2--Type 2
5l1498 Oil Pressure And Overspeed Housing Group--Part 2 Of 2--Type 2
3l7679 Slide Rail Group
3l2871 Solenoid
4l3176 Solenoid Group--Rack Shut-Off--Type 3
4L***76Solenoid Group; Rack Shut-Off Solenoid Group1
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4l3176 Solenoid Group--Rack Shut-Off--24 Volt--Type 1
4L***76Solenoid Group; Rack Shut-Off Solenoid Group1
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4l3176 Solenoid Group--Rack Shut-Off--Type 2
4L***76Solenoid Group; Rack Shut-Off Solenoid Group1
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8f2743 Hand Crank Group
8F***43Starting Crank Group; Manual Starting Crank Group1
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3l9694 Starting Engine Arrangement
2H***64Oil Pump Assembly1
3L***21Water Lines Group1
3L***36Fuel System Group1
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6l2588 Starting Engine Installation Group
0S***71Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting2
0S***87Bolt-Bracket Assembly To Timing Gear6
0S***91Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***823
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5l5353 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2--Type 2
5l5353 Electric Starting Motor Assembly--24 Volt--Part 2 Of 2--Type 1
5l5353 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2--Type 2
5l5353 Electric Starting Motor Assembly--24 Volt--Part 1 Of 2--Type 1
5l3648 Motor Assembly--24 Volt--Part 2 Of 2--Type 2
5l3648 Motor Assembly--24 Volt--Part 1 Of 2--Type 2
5l3648 Motor Assembly--24 Volt--Part 1 Of 2--Type 1
5l3648 Motor Assembly--24 Volt--Part 2 Of 2--Type 1
8l5938 Motor Assembly--24 Volt
5l5571 Electric Starting Motor Group--24 Volt--Type 2
5L***71Starting Motor Group-Electric; Electric Starting Motor Group1
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5l5571 Electric Starting Motor Group--24 Volt
5L***71Starting Motor Group-Electric; Electric Starting Motor Group1
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5l8537 Suction Fan, Drive And Guard Group--29 Inch--6 Blade
5L***37Suction Fan Drive And Guard Group1
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3l7435 Suction Fan, Drive And Guard Group--29 Inch--6 Blade
3L***35Suction Fan Drive And Guard Group1
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3l7434 Suction Fan, Drive And Guard Group--26 1/2 Inch--6 Blade
3L***34Suction Fan Drive And Guard Group1
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5l8539 Suction Fan, Drive And Guard Group--26 1/2 Inch--6 Blade
5L***39Suction Fan Drive And Guard Group1
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1l6513 Surge Tank Group
4m1812 Solenoid Switch Assembly
4l6884 Tachometer And Drive Group
4l6885 Tachometer And Drive Group
3l8508 Tachometer And Drive Group--L.H.
3l8469 Tachometer And Drive Group--R.H.
1f3290 Tachometer Drive Group
4h5122 Tachometer Drive Group
4l2353 Electric Tachometer Group--Type 1
4L***53Tachometer Group-Electric; Electric Tachometer Group1
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4l2353 Electric Tachometer Group--Type 2
4L***53Tachometer Group-Electric; Electric Tachometer Group1
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1l5010 Air Receiver Group--10.5 Cubic Foot Capacity
1l6562 Thermometer Group
2l7817 Thermostatic Pilot Valve
Torque Springs
4m6262 Transmission And Starter Pinion Group--Part 1 Of 2
4M***62Transmission And Starter Pinion Group1
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4m6262 Transmission And Starter Pinion Group--Part 2 Of 2
4M***62Transmission And Starter Pinion Group1
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6l2544 Transmission And Starter Pinion Group--Part 1 Of 2--Type 1
6L***44Transmission And Starter Pinion Group1
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6l2544 Transmission And Starter Pinion Group--Part 2 Of 2--Type 2
6L***44Transmission And Starter Pinion Group1
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7h1603 Transmission And Starter Pinion Group--Part 2 Of 2
7H***03Transmission And Starter Pinion Group1
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6l2544 Transmission And Starter Pinion Group--Part 2 Of 2--Type 1
6L***44Transmission And Starter Pinion Group1
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7h1603 Transmission And Starter Pinion Group--Part 1 Of 2
7H***03Transmission And Starter Pinion Group1
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6l2544 Transmission And Starter Pinion Group--Part 1 Of 2--Type 2
6L***44Transmission And Starter Pinion Group1
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5l7323 Turbocharger Oil Lines And Valves Group--Field Installation
5L***23Turbocharger Oil Lines And Valves Group1
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1l6560 Generator Installation Group - 2 Bearing
0S***85Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine16
1H***40Transfer; Safety On Dash Or Guards When Used1
1L***60Two-Bearing Generator Installation Group1
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1l5011 Regulator And Pressure Reducing Valve Group
6l3093 Vertical Exhaust Fitting Group--5 Inch
9m9239 Water Lines Group--Type 1
3l1621 Water Lines Group
9m9239 Water Lines Group--Type 2
6l2904 Water Temperature Safety Shut-Off Group
6L***04Water Temperature Safety Shut-Off Group; Water Temperature Shut-Off Group. Shown Below1
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4l3737 Water Temperature Shut-Off Group--First Type
4L***37Water Temperature Shut-Off Group1
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4l3737 Water Temperature Shut-Off Group--Third Type
4L***37Water Temperature Shut-Off Group1
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4l3737 Water Temperature Shut-Off Group--Second Type
4L***37Water Temperature Shut-Off Group1
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3l9921 Whistle Valve
2l9808 Wiring Group
1L***99Marker-(Wire Code)1
2L***57Terminal-Ring; (8-Ga, No. 10 Screw)10
2L***58Terminal (To Alternator Positionor A Terminal)2
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1n8509 Wiring Group
1L***99Marker-(Wire Code)1
1N***09Wiring Group-System; -Alternator1
2L***49Terminal-Ring 6 Ga. (No. 10 Screw)2
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4l1770 Woodward Governor Arrangement
4L***69Mounting And Drive Group91
4L***70Woodward Governor Arrangement1
5H***81Woodward Governor Group94
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6l4246 Woodward Governor Assembly
5h4281 Woodward Governor Group
5h4281 Woodward Governor Group--Type 2
5h4281 Woodward Governor Group--Type 3
Diesel Engine
4l3417 Accessory Drive And Governor Group--Part 1 Of 2
4L***17Accessory Drive And Governor Group1
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4l3417 Accessory Drive And Governor--Part 2 Of 2
4L***17Accessory Drive And Governor Group1
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4l3417 Accessory Drive And Governor Group--Part 2 Of 2
4L***17Accessory Drive And Governor Group1
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4l3417 Accessory Drive And Governor--Part 1 Of 2
4L***17Accessory Drive And Governor Group1
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3l3821 Air Cleaner Group--Oil Bath--Type 2
3l3821 Air Cleaner Group--Oil Bath--Type 1
4l3179 Air Cleaner Group--Dry Type--Type 1
4l3179 Air Cleaner Group--Dry Type--Type 2
5l4247 Air Cleaner Group--Dry Type
Breather, Oil Filler And Fumes Disposal
3l8462 Breather, Oil Filler And Fumes Disposal Group
3L***62Breather Oil Filler And Fumes Disposal Group1
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Camshaft (4h9649 N/S)
4l3400 Compression Release Control Group
4L***00Compression Release Control Group1
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Connecting Rod And Piston (7m9178 N/S)--6 Required
Connecting Rod And Piston--6 Required
Crankshaft (4l3367 N/S)
7h6759 Crankshaft Bearing Replacement Groups
4H***12Bearing Assembly Center1
6F***35Bearing Assembly Front1
6F***36Bearing Assembly Intermediate4
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7h6757 Crankshaft Bearing Replacement Groups
2H***49Bearing Assembly Intermediate4
2H***51Bearing Assembly Front1
4H***11Bearing Assembly Center1
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7h6755 Crankshaft Bearing Replacement Groups
7H***55Crankshaft Bearing Replacement Group1
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1s7584 Crankshaft Bearing Replacement Groups
1S***76Bearing Assembly Intermediate5
1S***77Bearing Assembly Center1
1S***78Bearing Assembly Rear1
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1s7583 Crankshaft Bearing Replacement Groups
1S***73Bearing Assembly Intermediate5
1S***74Bearing Assembly Center1
1S***75Bearing Assembly Rear1
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1s7582 Crankshaft Bearing Replacement Groups
1S***82Crankshaft Bearing Replacement Groups1
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Crankshaft Bearing Replacements
8m3477 Crankshaft Replacement Gear Group
8M***77Crankshaft Replacement Gear Group1
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Cylinder Block And Covers--Side View - Part 1 Of 2
Cylinder Block And Covers--Front View - Part 2 Of 2
Cylinder Block And Covers--Front View--Part 2 Of 2
3l8471 Cylinder Block Assembly
1s7878 Cylinder Block Assembly
Cylinder Head And Valve Mechanism--End View--Part 2 Of 2
Cylinder Head And Valve Mechanism--Side View - Part 1 Of 2
Cylinder Head And Valve Mechanism--Side View--Part 1 Of 2
Cylinder Head And Valve Mechanism--End View - Part 2 Of 2
Damper Guard (4l6029 N/S)
3l5916 Exhaust Pipe Group
Flywheel (3l3921 N/S)
Flywheel (5l1438 N/S)
8h5301 Fuel Filter Group
Fuel Injection Valves And Lines
Fuel Pump Housing (2s2500 N/S)
Fuel Pump Housing
8h4716 Fuel Pump Housing Group
5h2686 Fuel Transfer Pump Assembly
5l2956 Fuel Transfer Pump Assembly
Gasket Kits
1P***80Diesel Engine Basic0
1P***82Valve Grinding0
1S***18Gasoline Starting Engine Clutch Mechanism Repair0
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1p1122 Kit--Thrust Bearing Conversion
1P***22Kit1
2S***06Bearing --Thrust1
2S***08Deflector-- Oil1
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Manifolds (3l7532 N/S)
Oil Cooler (1s1983 N/S)
Oil Cooler
8h4662 Oil Cooler Group
8h4973 Oil Filter Assembly
1s372 Oil Filter Assembly
Oil Lines And Filter--Side View - Part 1 Of 2
Oil Lines And Filter (3l8465 N/S)--End View - Part 2 Of 2
Oil Lines And Filter (6l3729 N/S)--End View--Part 2 Of 2
Oil Lines And Filter (6l3729 N/S)--Side View - Part 1 Of 2
Oil Lines And Filter--End View - Part 2 Of 2
4h8614 Oil Pump Assembly
Oil Pump Drive
8h5327 Service Meter Group
3s3579 Service Meter Group
Torque Spring (5l7218 N/S)
4l584 Torque Spring Group
8m6836 Turbocharger Assembly--Type 3
4m4338 Turbocharger Assembly
8m2342 Turbocharger Assembly
8m6836 Turbocharger Assembly--Type 1
1m799 Turbocharger Assembly
4m4337 Turbocharger Assembly
8m6836 Turbocharger Assembly--Type 2
Water Lines
Water Lines (6l2887 N/S)
2s1681 Water Pump Assembly--Type 2
2s1681 Water Pump Assembly--Type 1
4l3497 Water Pump Group
6l2871 Water Pump Group
Water Pump Idler Gear (5h4204 N/S)
Generators
7l7395 Exciter And Regulator Assembly--Type 1
7l7395 Exciter And Regulator Assembly--Type 2
7l7395 Exciter And Regulator Assembly--Type 3
2l2740 Exciter Assembly
7l28 Generator--3 Phase--Side View--Type 1-Part 2 Of 2
5l5913 Generator--3 Phase--Side View-Part 1 Of 2
4l1453 Generator--2400 Volt--60 Cycle, 3 Phase
7l28 Generator--3 Phase--Side View--Type 2--Part 2 Of 2
7l29 Generator--3 Phase--Side View--Type 2--Part 2 Of 2
7l28 Generator--3 Phase--End View--Type 2-Part 1 Of 2
5l5912 Generator--120-208 Volt--60 Hertz, 3 Phase--Side View-Part 1 Of 2
7l29 Generator--3 Phase--Side View--Type 1--Part 2 Of 2
4l1452 Generator--240-480 Volt--60 Cycle, 3 Phase
4l1451 Generator--120-208 Volt--60 Cycle, 3 Phase
4l1452 Generator--240-480 Volt--60 Cycle, 3 Phase--Type 2
5l5913 Generator--3 Phase--End View-Part 2 Of 2
5l5912 Generator--120-208 Volt--60 Hertz, 3 Phase--End View-Part 2 Of 2
7l29 Generator--3 Phase--End View--Type 1--Part 1 Of 2
7l29 Generator--3 Phase--End View--Type 2--Part 1 Of 2
7l28 Generator--3 Phase--End View--Type 1-Part 1 Of 2
8f9866 Grease Gun
Name Plates And Transfers
1H***40Transfer; Safety On Dash Or Guards When Used1
1M***98Transfer; Filter Instructions On Oil Filter Cover1
1S***47Transfer; Crankcase Instructions On Oil Filter Or Open Space Near Oil Filter1
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3l2987 Reactor Assembly
3l8737 Reactor Assembly
3l8659 Regulator Assembly
5l6993 Static Exciter And Regulator Assembly--Top View--Part 1 Of 2--Type 1
5L***93Static Exciter And Regulator Assembly1
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5l6993 Static Exciter And Regulator Assembly--Top View--Part 2 Of 2--Type 2
5L***93Static Exciter And Regulator Assembly1
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5l6993 Static Exciter And Regulator Assembly--Top View--Part 2 Of 2--Type 1
5L***93Static Exciter And Regulator Assembly1
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5l6993 Static Exciter And Regulator Assembly--Top View--Part 1 Of 2--Type 2
5L***93Static Exciter And Regulator Assembly1
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4l7475 Stator Assembly
4l6686 Stator Assembly
4l6669 Stator Assembly
4l1560 Tool Group
9s7977 Hand Tool Group

D342C serial number reference

Locate the ID plate on the machine outer frame or the engine data plate on the left side near the injection pump/rocker arm cover. The prefix is the first three alphanumeric characters of the serial number or the last eight characters of a 17-character PIN.

PrefixIdentifies
32BD342C Industrial Engine

Frequently asked questions

What are the primary engine specifications for the D342C?

The D342C is a 6-cylinder turbocharged diesel engine delivering 300 hp (224 kW) of flywheel power.

What is the approximate weight of the D342C engine?

The engine weight is approximately 7,800 lbs.

What machines commonly utilize this engine?

The D342C engine is used in various industrial and marine applications, including the Caterpillar D8K crawler dozer.

What D342C owners discuss

What are the primary causes of oil appearing in the radiator cap on a D342 engine?
Oil leaking into the radiator is typically caused by a failure in the engine oil cooler or leaking head gaskets. The engine oil cooler, located near the engine oil filter, acts as an oil-to-water heat exchanger; if it fails, oil pressure can force oil into the coolant system. If the oil cooler has been pressure tested and passed, the issue likely stems from head gasket failure. To check for coolant entering the oil, draw a sample from the drain cock and heat it on a steel plate; significant bubbling indicates coolant contamination in the oil.
Where is the engine oil cooler located on the D342 series?
The engine oil cooler is typically positioned near the engine oil filter. On certain configurations, such as the D342T, there are two coolers on the left-hand side of the engine: one horizontal unit for the engine and one vertical unit located under the generator for the transmission.
What specific engine performance characteristics are noted for the D342 turbocharged configuration?
The D342 turbocharged engine is rated at 300 flywheel horsepower (224 kW). This configuration maintains full rated power up to an altitude of 7,500 ft (2,300 m).
What are the known mechanical risks for D4-class machines with similar era components?
In certain related models like the D4D, there is a reported risk of breaking the cross shaft support areas in the rear housing, particularly in high-use environments such as the logging industry. Additionally, on some configurations, the saddle where the equalizer spring bolts to the block can experience bolt hole failure.
What should be inspected regarding cylinder head compatibility when replacing a D342 head?
When sourcing replacement heads, verify casting numbers, as multiple reference numbers (OEM part reference) can interchange. Be cautious of 'spacer plate' heads; these lack provisions for directors and require a different head gasket to ensure water sealing at the director holes. Furthermore, verify that valve guide diameters match your existing valves, as some aftermarket or later-series heads may use smaller diameter valve stems.
What is the most critical item to check when purchasing a used D342-powered machine?
Verify the exact serial-prefix specification sheet and the installed attachment package. Variations in the serial range can significantly change the machine's weight, reach, fuel consumption, and transport requirements.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

Serial-range & configuration variants

This page covers the Caterpillar D342C. Related factory variants of the same model family:

D342C

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