Caterpillarengine - industrialindustrial engine
Caterpillar D379
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D379 is not a complete machine - it is a heavy-duty diesel engine, a mechanical four-stroke V8 drawn from Caterpillar's 159 mm (6.25 in) bore Vee-engine family, the same basic architecture shared with the V12 D398 and V16 D399 (and their gas-fueled G379/G398/G399 counterparts). Caterpillar built it in naturally aspirated and turbocharged-aftercooled (TA) versions, with published ratings spanning roughly 500-750 hp depending on arrangement and duty cycle, at rated speeds of about 1,000-1,200 rpm. Factory arrangements included industrial (drilling-rig, pump, and compressor drive), marine propulsion, generator-set, and locomotive power. Bare-engine weight runs roughly 4,760-5,100 kg (10,500-11,240 lb) depending on accessories fitted. Production dates to the 1960s-1970s, entirely ahead of electronic engine control - fuel metering runs through a mechanical injection pump and a hydromechanical governor, with no ECM or fault-code system of any kind.
What changed across the line was mostly aspiration and duty rating rather than the base engine: naturally aspirated units for continuous industrial and marine duty versus turbocharged-aftercooled D379 TA units for higher output, plus a D379B generator-set-rated variant built under its own serial prefix. Marine installations could be specified with raw-water cooling or keel cooling depending on the vessel. No source documents a dedicated one-for-one D379 successor; Caterpillar's industrial and marine V8/V12 engine lineup eventually moved on to the 3400-series engines, but that is a broader product-line shift, not a named replacement. The D379 still matters in the used and parts market because it powered genuinely long-lived equipment - oilfield drilling rigs, tugs and pushboats, and standby generator sets - much of which is still in service. Specialist support for its mechanical injection pump and hydromechanical governor is thinning with age, which is pushing some owners toward a repower with a later engine rather than another rebuild, an owner's cost decision rather than a factory succession.
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 D379 specifications
Engine
| Family | D379 is the V8 member of Caterpillar's D379/D398/D399 industrial and marine engine family; D398 is the V12 and D399 the V16 sharing the same basic cylinder design. |
| Configuration | V8, four-stroke-cycle diesel. Base D379 runs turbocharged; a turbocharged-aftercooled variant was also built and sold as the D379 TA. |
| Fuel system | Mechanical direct injection with a hydromechanical governor; no-adjustment injection design intended to hold rated power and fuel economy without periodic recalibration. |
| Gross power and rated speed | Published ratings vary widely by era, duty class, and dress (industrial, oilfield, marine, or generator drive): figures on record run from about 500 HP up to roughly 715-750 HP, with rated speed most commonly 1200 rpm (some continuous-duty ratings at 1000-1050 rpm). Treat any single HP figure as configuration-specific, not a universal rating. |
| Generator-drive rating example | One documented genset build pairs the D379 with a 400 kW (500 kVA) generator end at 1200 rpm, 60 Hz. |
| Bore, stroke, displacement | Not reliably documented. The only public figures found (about 178 mm bore x 191 mm stroke, ~23.8 L) come from a listing that also mischaracterizes the cylinder count, so they are not trustworthy; verify against the factory engine manual before citing. |
| Emissions tier | Legacy pre-emissions-tier industrial/marine engine; not applicable to modern Tier/Stage ratings. |
Weights
| Bare engine weight | Approximately 4763 kg (10,500 lb) for a marine-dress bare engine (no reduction gear). |
| Packaged generator set weight | Approximately 5098 kg (11,240 lb) for a skid-mounted 400 kW/500 kVA set with generator end and radiator. |
| Ground pressure | Not applicable. Stationary/industrial power unit, no undercarriage. |
Dimensions
| Bare engine footprint (one marine dress) | Length 2400 mm (7 ft 10 in) x width 1400 mm (4 ft 7 in) x height 2300 mm (7 ft 7 in). Footprint changes with accessory dress (air cleaner, cooling, starter type). |
| Packaged generator set footprint | Length 3454 mm (11 ft 4 in) x width 1626 mm (5 ft 4 in) x height 2438 mm (8 ft), open skid-mounted set. |
| Transport dimensions, wheelbase, ground clearance | Not applicable. This is a bare engine/power unit, not a mobile chassis machine. |
Performance
| Duty type | Stationary industrial/marine power unit. No travel speed, drawbar, lift, dig, or dump figures apply. |
| Rotation | Standard rotation counterclockwise viewed from the flywheel (rear) end on marine-dress units; confirm rotation for the specific drive application (marine gear vs. generator vs. pump drive). |
| Cooling arrangement | Built in both radiator-cooled (engine-driven radiator) and keel-cooled marine dress, depending on application. |
| Starting | Air-start and electric-start versions both documented depending on dress. |
Service capacities (summary)
| Crankcase oil capacity | Not found in accessible public sources for this exact model; refer to the D379/D398/D399 service manual lubrication section for the correct fill volume. |
| Cooling system capacity | Not found in accessible public sources for this exact model; refer to the factory cooling-system section for fill volume before servicing. |
| Fuel tank | Not applicable as a standard spec. The bare engine has no integral fuel tank; capacity depends on the skid, vehicle, or vessel it is installed in. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D379 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | Not documented for this exact serial/rating configuration in accessible sources. Sump size varies by industrial rating (500-540 hp class); verify the figure against the machine's own OMM or Technical Marketing Information sheet before a service fill. | Caterpillar diesel engine oil (Cat DEO) or an equivalent CD/CF-class diesel engine oil. SAE 30 for warm/steady ambient operation, SAE 10W or 10W-30 for cold-weather starts, matching Caterpillar's standard viscosity-by-temperature guidance for this generation of mechanical, non-electronic diesel engine. |
| Cooling system | Not documented for this exact configuration in accessible sources. Jacket-water volume depends on the radiator, keel cooler, or heat-exchanger package fitted to the installation; verify against the OMM or the cooling-package nameplate. | Water-based coolant treated with a Caterpillar corrosion/scale inhibitor (this engine generation predates Cat ELC). Use a glycol antifreeze blend only where freeze protection is required, and maintain inhibitor concentration per the conditioner label. |
| Fuel system | No fixed factory fuel tank capacity applies. This is a bare industrial power unit; it draws from a customer-supplied day tank sized to the installation, and the OMM does not list a standard tank size. | No. 2-D diesel fuel meeting Caterpillar's standard distillate fuel specification. Use a winter-blend fuel in cold climates to prevent wax gelling in the fuel system. |
| Grease (all fittings) | Spec only. No chart quantity is given; apply grease at each fitting until clean grease purges at the joint. | Caterpillar multipurpose grease, NLGI 2, for linkage, governor linkage, and accessory-drive grease fittings. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D379 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
Servicing the D379 beyond the schedule
Predictive maintenance & fluid analysis
Schedule oil sampling on the D379's crankcase to catch cylinder-liner and main or rod-bearing wear metals before they show up as pressure loss - this mechanical V8 has no fault code to flag drift. Trend fuel-filter differential pressure and injector spray pattern, since the jerk-type mechanical injection pump and hydromechanical governor wear and foul gradually rather than failing outright. On turbocharged-aftercooled (TA) builds, watch boost pressure and aftercooler coolant temperature apart from jacket water, and log exhaust-stack color and temperature at every check.
Corrective & common repairs
The most common D379 complaint is a hydromechanical governor that hunts or answers load sluggishly, usually linkage wear or gummed varnish in the mechanical injection pump after the engine sits idle between duty cycles. Turbocharger bearing wear on TA-rated units shows up as boost loss and blue-grey smoke. Marine installations foul their raw-water pump, strainer, or keel-cooling lines and need periodic cleaning. Because industrial, marine, and generator-set arrangements carry different cooling hardware and fuel settings, confirm the arrangement before swapping parts across a rebuild.
Overhaul & rebuild points
Teardown on this V8 consistently turns up cylinder-liner and connecting-rod-bearing wear proportional to hours run, the same pattern seen on its D398 and D399 big-bore siblings. Run a compression and blow-by check across all eight cylinders before committing to a rebuild. The mechanical injection pump and hydromechanical governor need specialist test-stand calibration, a skill base thinning industry-wide, so line up that support before scheduling the work. Confirm the engine's industrial, marine, or genset serial prefix first, since overhaul parts differ by arrangement.
Seasonal & environment servicing
In cold climates, run a fuel grade with a cloud point well below ambient temperature, since the mechanical jerk-pump injection system has no electronic fuel heating to fall back on if paraffin starts to gel. Marine D379s cooled by raw water or keel cooling need lay-up and freeze protection specific to that circuit, separate from the jacket-water side. Standby generator sets sitting idle between calls should be run periodically so fuel does not varnish the governor linkage and injection pump.
D379 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 8M-3120 | Element --Starting Engine Air Cleaner | Air intake service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D379 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Overspeed contactor switch (overspeed shutdown) | Engine tripped and shut down because rated speed was exceeded; a mechanical/electrical overspeed contactor closed and energized the shutoff solenoid. | Governor or linkage malfunction, sudden loss of load on a generator or pump drive, or a sticking fuel rack. | Do not restart until the cause of the speed excursion is found; inspect governor linkage and fuel rack for binding, then push the manual reset button on the overspeed switch before attempting a restart. |
| Oil pressure contactor switch (low oil pressure shutdown) | Lube oil pressure dropped below the switch setting, closing the oil pressure contactor and energizing the shutoff solenoid to stop the engine. | Low oil level, plugged oil filter, worn oil pump, or a failed/out-of-calibration pressure switch. | Check crankcase oil level and filter condition first; verify actual oil pressure with a test gauge at low idle before assuming the switch itself is faulty. |
| Water temperature contactor switch (high coolant temperature shutdown) | Coolant temperature exceeded the switch setting, closing the water temperature contactor and energizing the shutoff solenoid. | Low coolant level, blocked radiator or heat exchanger, failed water pump, or a stuck thermostat. | Check coolant level and look for restricted flow through the radiator or heat exchanger; confirm the switch trips at the correct temperature before returning the engine to service. |
| Remote manual control switch (remote/manual shutdown) | The engine was shut down from a remote panel or manual stop switch rather than by an automatic safety trip. | Deliberate operator shutdown, or a wiring fault in the remote stop circuit causing an unintended trip. | Confirm switch position at the remote station and check wiring continuity to the shutoff solenoid if the stop was not intentional. |
| Shutoff solenoid de-energized (no-start / unexpected shutdown, no code display) | The fuel shutoff solenoid dropped out, stopping fuel delivery; this is the common end result of any of the contactor trips above, or of a wiring/battery problem, and is not tied to a specific numbered code. | Any tripped safety contactor (overspeed, oil pressure, water temperature), low battery voltage, loose wiring, or a bad ground at the solenoid circuit. | Trace back through each contactor switch and the battery/wiring circuit to the solenoid to find which one dropped out; reset the tripped switch only after the underlying cause is corrected. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D379 attachments & work tools
Machine type / work-tool applicability
D379 is a large-displacement V8 diesel power unit built for industrial, marine, and mechanical-drive duty, not an implement-carrying machine. It has no factory bucket, blade, fork, or coupler-mounted work-tool line of its own; any ground-engaging or material-handling attachments belong to whatever host machine or driven set it powers, not to the engine record.
Driven-equipment / application arrangements
Documented factory-style arrangements pair the D379 to a generator end for prime, standby, or continuous industrial power, to a marine gear for vessel propulsion or shipboard auxiliary power, and to mechanical-drive loads such as pumps and compressors, including oilfield drilling-rig power units. Exact arrangement and rating vary by installation and build sheet.
Flywheel housing / coupling standard
Industrial and driven-equipment builds in this class use an SAE No. 00 flywheel housing, the standard large-bore coupling face that lets the block mount directly to a generator end, marine gear, or pump/compressor drive coupling without a separate adapter.
Cooling arrangement options
Industrial power-unit builds commonly use a radiator-and-fan jacket-water cooling package sized to the installation (radiator core size varies by build), plus a separate oil cooler. Marine and some standby builds instead use heat-exchanger or remote-cooling arrangements in place of the radiator; confirm the cooling arrangement against the specific serial/build sheet, since it varies by configuration.
Governor and instrument/control options
Factory power-unit packages offered a hydra-mechanical governor for continuous heavy-duty speed control, with an instrument panel and engine pre-lube provisions mounted as part of the skid or industrial-rail base. Governor droop/percentage and panel fitment vary by configuration and application (generator drive vs. mechanical drive).
Guarding options
Guarding on this engine class centers on rotating-component protection: cooling-fan guard, belt guards, and a drive-coupling or PTO guard where the engine feeds a generator, pump, or compressor. These are standard safety fitments for the driven arrangement rather than work-tool accessories.
All D379 assemblies by section
Every catalogued assembly group for the Caterpillar D379. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
5l6639 Air Actuated Rack Shut-Off Group
| 5L***39 | Air Actuated Rack Shut-Off Group | 1 |
5l5908 Air Cleaner And Exhaust Manifold Group
| 5L***08 | Air Cleaner And Exhaust Manifold Group | 1 |
6l2610 Air Cleaner Assembly--Heavy Duty
| 6L***10 | Air Cleaner As | 1 |
6l2611 Air Cleaner Group--Heavy Duty--Type 3
| 6L***11 | Air Cleaner Group | 1 |
4l4720 Air Cleaner Group
| 4L***20 | Air Cleaner Group | 1 |
6l2611 Air Cleaner Group--Heavy Duty--Type 4
| 6L***11 | Air Cleaner Group | 1 |
6l2611 Air Cleaner Group--Heavy Duty--Type 1
| 6L***11 | Air Cleaner Group | 1 |
6l2611 Air Cleaner Group--Heavy Duty--Type 2
| 6L***11 | Air Cleaner Group | 1 |
6l5833 Air Filter Indicator Group
| 6L***33 | Air Cleaner Indicator Group | 1 |
5l7650 Air Cleaner Support Group--Factory Installation--Type 3
| 5L***50 | Air Cleaner Support Group | 1 |
5l7650 Air Cleaner Support Group--Factory Installation--Type 2
| 5L***50 | Air Cleaner Support Group | 1 |
5l7650 Air Cleaner Support Group--Factory Installation--Type 1
| 5L***50 | Air Cleaner Support Group | 1 |
5l4214 Air Filter Indicator Group
| 5L***14 | Air Filter Indicator Group | 1 |
6l5681 Air Precleaner Group--Full View--Type 2
| 6L***81 | Air Precleaner Group | 1 |
6l5681 Air Precleaner Group--Full View--Type 1
| 6L***81 | Air Precleaner Group | 1 |
6f7691 Air Receiver Group--28 Cubic Foot Capacity
| 6F***91 | Air Receiver Group | 1 |
6l2801 Air Starting Group--R.H.--S.A.E. Standard Engine Rotation--Type 1
| 6L***01 | Air Starting Group | 1 |
6l2804 Air Starting Group--L.H.--S.A.E. Standard Engine Rotation--Type 1
| 6L***04 | Air Starting Group | 1 |
6l2802 Air Starting Group--L.H.--S.A.E. Opposite Engine Rotation--Type 2
| 6L***02 | Air Starting Group | 1 |
6l2803 Air Starting Group--R.H.--S.A.E. Opposite Engine Rotation--Type 2
| 6L***03 | Air Starting Group | 1 |
6l2803 Air Starting Group--R.H.--S.A.E. Opposite Engine Rotation--Type 1
| 6L***03 | Air Starting Group | 1 |
6l2802 Air Starting Group--L.H.--S.A.E. Opposite Engine Rotation--Type 1
| 6L***02 | Air Starting Group | 1 |
6l2801 Air Starting Group--R.H.--S.A.E. Standard Engine Rotation--Type 2
| 6L***01 | Air Starting Group | 1 |
6l8417 Air Starting Group--R.H.--S.A.E. Opposite Standard Engine Rotation--Replaces 6l2803
| 6L***17 | Air Starting Group | 1 |
6l2804 Air Starting Group--L.H.--S.A.E. Standard Engine Rotation--Type 2
| 6L***04 | Air Starting Group | 1 |
5l2717 Air Starting Installation Group--L.H. Type 1
| 5L***17 | Air Starting Installation Group | 1 |
5l8148 Air Starting Installation Group--R.H. Type 1
| 5L***48 | Air Starting Installation Group | 1 |
5l8148 Air Starting Installation Group--R.H.--Type 2
| 5L***48 | Air Starting Installation Group | 1 |
5l2717 Air Starting Installation Group--L.H.--Type 2
| 5L***17 | Air Starting Installation Group | 1 |
5l1750 Air Starting Motor Assembly--S.A.E. Standard Engine Rotation
| 5L***50 | Air Starting Motor Assembly | 1 |
5l1243 Alternator--32 Volt, 60 Ampere--Type 1
| 5L***43 | Alternator As | 1 |
5l1243 Alternator--32 Volt, 60 Ampere--Type 2
| 5L***43 | Alternator As | 1 |
5l1019 Alternator Group--32 Volt, 60 Ampere Type 1
| 5L***19 | Alternator Group | 1 |
5l1019 Alternator Group--32 Volt, 60 Ampere--Type 2
| 5L***19 | Alternator Group | 1 |
5l1019 Alternator Group--32 Volt, 60 Ampere--Type 3
| 5L***19 | Alternator Group | 1 |
2l276 Automatic Start-Stop Panel Assembly--32 Volt
| 2L***76 | Automatic Start | 1 |
5l2066 Auxiliary Drive Group
| 5L***66 | Auxiliary Drive Group | 1 |
5l7680 Auxiliary Drive Group--20 Horsepower
| 5L***80 | Auxiliary Drive Group | 1 |
Basic Engine Arrangement
| 1F***73 | Rod--Governor Control To Carburetor | 1 |
| 2***A | Pin--Governor Lever To Control Rod | 1 |
| 2H***64 | Oil Pump Assembly | 1 |
Basic Starting Engine Arrangement
| 4L***71 | Ignition System Group | 1 |
| 6L***29 | Carburetor And Air Transfer Pipe Group | 1 |
| 9M***13 | Oil Pump Assembly | 1 |
5f5276 Battery Group--30 Volt, 315 Ampere Hour
| 5F***76 | Battery Group | 1 |
3n4653 Battery--24 Volt, 300 Ampere Hours
| 3N***53 | Battery Group | 1 |
7l7871 Battery--24 Volt, 172 Ampere Hours
| 7L***71 | Battery Group; (24-Volt)(24-Volt) | 1 |
1l5663 Battery Group--30 Volt, 170 Ampere Hour
| 1L***63 | Battery Group | 1 |
Camshaft And Governor
6l2529 Carburetor And Air Transfer Pipe Group
| 6L***29 | Carburetor And Air Transfer Pipe Group | 1 |
7m6038 Carburetor Assembly
| 7M***38 | Carburetor Assembly | 1 |
5l5905 Carburetor Assembly
| 5L***05 | Carburetor Assembly | 1 |
4n4985 Air Start Changeover Group--S.A.E. Standard Engine Rotation--Field Installation
| 4N***85 | Changeover Group | 1 |
4n6019 Air Start Changeover Group--S.A.E. Opposite Standard Engine Rotation--Field Installation
| 4N***19 | Changeover Group | 1 |
1h9435 Clutch And Starter Pinion Control Group
| 1H***35 | Clutch And Starter Pinion Control Group | 1 |
1l7470 Clutch Group
| 1L***70 | Clutch Group | 1 |
Complete Gasoline Starting Engine Arrangement
| 1L***70 | Clutch Group | 1 |
| 6L***79 | Fuel System Group | 1 |
| 6L***86 | Starting Engine Installation Group | 1 |
Compression Release Control
Connecting Rod And Piston--2 Required
5l3693 Governor Control Group--Remote
| 5L***93 | Control Group-Governor | 1 |
7l5479 Generator Drive Coupling Group
| 7L***79 | Coupling Group-Drive | 1 |
5l3395 Flexible Coupling Group--Type 2
| 5L***95 | Coupling Group-Flexible | 1 |
5l3395 Flexible Coupling Group--Type 1
| 5L***95 | Coupling Group-Flexible | 1 |
2n8816 Crankcase Explosion Relief Valve Arrangement
| 2N***16 | Crankcase Explosion Relief Valve Arrangement | 1 |
Crankshaft
Cylinder Block, Cylinder Head And Valve Mechanism--Part 1 Of 2
Cylinder Block, Cylinder Head And Valve Mechanism--Part 2 Of 2
6l2211 Tachometer Drive Group
| 6L***11 | Drive Group-Tachometer; Tachometer Drive Group | 1 |
5l7959 Electric Automatic Start-Stop Arrangement--32 Volt
| 1A***15 | Washer- 1.6 mm(.065 In.)Thick | 2 |
| 1B***01 | Nut Generator Line Leads; Nut-Generator Line Leads | 8 |
| 1L***99 | Contactor Oil Pressure | 1 |
6l4665 Electric Motor Assembly--12 Volt
| 6L***65 | Electric Motor Assembly | 1 |
6l5978 Electric Starting Group--12 Volt
| 6L***78 | Electric Starting Group | 1 |
2l1704 Electric Starting Group--12 Volt--Type 2
| 2L***04 | Electric Starting Group | 1 |
2l1704 Electric Starting Group--12 Volt--Type 1
| 2L***04 | Electric Starting Group | 1 |
8l2732 Electric Starting Installation Group--32 Volt--Type 1
| 5L***32 | Electric Starting Installation Group | 1 |
5l2732 Electric Starting Installation Group--32 Volt--Type 2
| 5L***32 | Electric Starting Installation Group | 1 |
5l4405 Starting Motor Assembly--32 Volt--S.A.E. Standard Engine Rotation--R.H.--Part 2 Of 2
| 5L***05 | Electric Starting Motor Assembly | 1 |
5l4405 Starting Motor Assembly--32 Volt--S.A.E. Standard Engine Rotation--R.H.--Part 1 Of 2
| 5L***05 | Electric Starting Motor Assembly | 1 |
8l8204 Electric Starting Motor Assembly--32 Volt--R.H. & L.H.--Part 2 Of 2--Type 1
| 8L***04 | Electric Starting Motor Assembly | 1 |
8l8204 Electric Starting Motor Assembly--32 Volt--R.H. & L.H.--Part 1 Of 2--Type 1
| 8L***04 | Electric Starting Motor Assembly | 1 |
5l5355 Electric Starting Motor Assembly--32 Volt
| 5L***55 | Electric Starting Motor Assembly | 1 |
8l8204 Electric Starting Motor Assembly--32 Volt--R.H. And L.H.--Part 1 Of 2--Type 2
| 8L***04 | Electric Starting Motor Assembly | 1 |
8l8204 Electric Starting Motor Assembly--32 Volt--R.H. And L.H.--Part 2 Of 2--Type 2
| 8L***04 | Electric Starting Motor Assembly | 1 |
5l1525 Electric Tachometer And Drive Group
| 5L***24 | Electric Tachometer Group | 1 |
| 5L***25 | Electric Tachometer And Drive Group | 1 |
| 5L***01 | Tachometer Drive Group | 1 |
5l1524 Electric Tachometer Group
| 5L***24 | Electric Tachometer Group | 1 |
2l4425 Enclosed Clutch Group
| 2L***25 | Enclosed Clutch Group | 1 |
6l2522 Enclosed Clutch Group
| 6L***22 | Enclosed Clutch Group | 1 |
5l2387 Engine Support Group
| 5L***87 | Engine Support Group | 1 |
5l1980 Fan Drive Group
| 5L***80 | Fan Drive Group | 1 |
3l6835 Fan Group--54 Inch With 4 Inch Blades
| 3L***35 | Fan Group | 1 |
3l6834 Fan Group--54 Inch With 4 Inch Blades
| 3L***34 | Fan Group | 1 |
5l6797 Vertical Exhaust Fitting Group--8 Inch Flexible
| 5L***97 | Fitting Group-Exhaust | 1 |
6l3642 Exhaust Flange Group-8 Inch
| 6L***42 | Flange Group-Exhaust; Exhaust Flange Group | 1 |
5l5475 Flywheel Assembly--S.A.E. Standard Engine Rotation
| 5L***45 | Flywheel Assembly | 1 |
2l4426 Flywheel Clutch Assembly
| 2L***26 | Flywheel Clutch Assembly | 1 |
5l2402 Fuel System Group
| 5L***02 | Fuel System Group | 1 |
6l2579 Fuel System Group
| 6L***79 | Fuel System Group | 1 |
5l2400 Gasoline Starting Engine Arrangement
| 0S***92 | Bolt--Cover To Flywheel Housing | 3 |
| 1H***35 | Clutch And Starter Pinion Control Group | 1 |
| 1L***70 | Clutch Group | 1 |
5l9894 Instrument Group--12 Volt
| 5L***94 | Gauge Group; -Oil Pressure, Water Temperature | 1 |
5l9895 Instrument Group--24 And 32 Volt
| 5L***95 | Gauge Group; -Engine Oil Pressure, Water Temperature | 1 |
3l4326 Generator--12 Volt, 35 Ampere
| 3L***26 | Generator | 1 |
5l5750 Generator--12 Volt, 35 Ampere
| 5L***50 | Generator Assembly | 1 |
5l2487 Generator Coupling Group
| 5L***87 | Generator Coupling Group | 1 |
5l1978 Generator Group--12 Volt, 35 Ampere--Type 2
| 5L***78 | Generator Group | 1 |
5l1978 Generator Group--12 Volt, 35 Ampere--Type 1
| 5L***78 | Generator Group | 1 |
5l2560 Generator Installation Arrangement--Type 3
| 5L***60 | Generator Installation Arrangement | 1 |
5l2560 Generator Installation Arrangement--Type 1
| 5L***60 | Generator Installation Arrangement | 1 |
5l2560 Generator Installation Arrangement--Type 2
| 5L***60 | Generator Installation Arrangement | 1 |
5l2560 Generator Installation Arrangement--Type 4
| 5L***60 | Generator Installation Arrangement | 1 |
3l8255 Woodward Governor--Part 1 Of 2
| 3L***55 | Governor | 1 |
3l8255 Woodward Governor--Part 2 Of 2
| 3L***55 | Governor | 1 |
5l7504 Governor Assembly--L.H.
| 5L***04 | Governor Assembly--L.H. | 1 |
Governor Control Chart
3l8869 Governor Control Group--Positive Locking
| 3L***69 | Governor Control Group; Governor Control Group Between 72 & 73 | 1 |
5l1819 Governor Control Group--Hydraulic
| 5L***19 | Governor Control Group | 1 |
4l6811 Governor Control Lever Group
| 4L***11 | Governor Control Lever Group; Governor Control Lever Group Shown Below | 1 |
5l4061 Governor Control Link Assembly
| 5L***61 | Governor Control Link Assembly | 1 |
6l2440 Governor Conversion Group--10% Regulation
| 6L***40 | Governor Conversion Group | 1 |
5l9806 Governor Conversion Group--10% Regulation
| 5L***06 | Governor Conversion Group | 1 |
5l7474 Governor Conversion Group--10% Regulation
| 5L***74 | Governor Conversion Group | 1 |
5l7473 Governor Conversion Group--10% Regulation
| 5L***73 | Governor Conversion Group | 1 |
6l4913 Governor Conversion Group--10% Regulation
| 6L***13 | Governor Conversion Group | 1 |
5l7472 Governor Conversion Group--3% Regulation
| 5L***72 | Governor Conversion Group | 1 |
5l6945 Governor Conversion Group--3% Regulation
| 5L***45 | Governor Conversion Group | 1 |
8l8919 Woodward Governor Group
| 8L***19 | Governor Group-Woodward | 1 |
2l6745 Governor Pneumatic Actuator Group
| 2L***45 | Governor Pneumatic Actuator Group | 1 |
2l2040 Generator Coupling Group
| 2L***40 | Guard Group-Coupling | 1 |
4l7604 Handle Group
| 4L***04 | Handle Group-Control; Governor Control Handle Group | 1 |
5l6505 Heat Exchanger Assembly--Type 2
| 5L***05 | Heat Exchanger As | 1 |
5l6505 Heat Exchanger Assembly--Type 1
| 5L***05 | Heat Exchanger As | 1 |
5l6504 Heat Exchanger Assembly--Type 1
| 5L***04 | Heat Exchanger Assembly | 1 |
5l6502 Heat Exchanger Assembly--Type 2
| 5L***02 | Heat Exchanger Assembly | 1 |
5l6504 Heat Exchanger Assembly--Type 2
| 5L***04 | Heat Exchanger Assembly | 1 |
5l6503 Heat Exchanger Assembly--Type 2
| 5L***03 | Heat Exchanger Assembly | 1 |
7l490 Heat Exchanger Assembly
| 7L***90 | Heat Exchanger Assembly | 1 |
5l6502 Heat Exchanger Assembly--Type 1
| 5L***02 | Heat Exchanger Assembly | 1 |
7l488 Heat Exchanger Assembly
| 7L***88 | Heat Exchanger Assembly | 1 |
5l6503 Heat Exchanger Assembly--Type 1
| 5L***03 | Heat Exchanger Assembly | 1 |
Heat Exchanger Chart
7l489 Heat Exchanger Assembly
| 7L***89 | Heat Exchanger Group | 1 |
8l5342 Heat Exchanger Assembly
| 8L***42 | Heat Exchanger Group | 1 |
8l5340 Heat Exchanger Assembly
| 8L***40 | Heat Exchanger Group | 1 |
7l491 Heat Exchanger Assembly
| 7L***91 | Heat Exchanger Group | 1 |
4l4471 Ignition System Group
| 4L***71 | Ignition System Group | 1 |
4l4471 Ignition System Group--Type 1
| 4L***71 | Ignition System Group | 1 |
4l4471 Ignition System Group--Type 3
| 4L***71 | Ignition System Group | 1 |
4l4471 Ignition System Group--Type 2
| 4L***71 | Ignition System Group | 1 |
4l8747 Instrument And Panel Mounting Group--Type 1
| 4L***47 | Instrument And Panel Mounting Group | 1 |
4l8747 Instrument And Panel Mounting Group--Type 2
| 4L***47 | Instrument And Panel Mounting Group | 1 |
5l7477 Instrument Panel Group--Shut-Off--Type 1
| 5L***77 | Instrument Panel Group | 1 |
5l7477 Instrument Panel Group--Shut-Off--Type 2
| 5L***77 | Instrument Panel Group | 1 |
5l2592 Starting System Junction Box Group
| 5L***92 | Junction Box Group; Starting System Junction Box Group | 1 |
5b7529 Line Pressure Regulator--2 Required
| 5B***29 | Line Pressure Regulator | 1 |
4l9581 Vernier Control Link Group
| 4L***81 | Link Group | 1 |
4n7556 Air Motor Lubricator Group
| 4N***56 | Lubricator Group-Air Motor | 1 |
3h3171 Air Motor--S.A.E. Opposite Standard Engine Rotation
5f7739 Magnetic Switch
| 5F***39 | Magnetic Switch | 1 |
7m4700 Magneto Assembly
| 7M***00 | Magneto Assembly | 1 |
3s2987 Magneto Assembly
| 3S***87 | Magneto Assembly | 1 |
1s3350 Magneto Assembly
| 1S***50 | Magneto Assembly | 1 |
8m9145 Magneto Assembly
| 8M***45 | Magneto Assembly | 1 |
5l5907 Manifold And Carburetor Group
| 5L***07 | Manifold And Carburetor Group | 1 |
9m7894 Manual Starting Crank Group
| 9M***94 | Manual Starting Crank Group | 1 |
3l2443 Electric Starting Motor--12 Volt
6l6731 Air Starting Motor Assembly--S.A.E. Standard Engine Rotation
| 6L***31 | Motor As-Air | 1 |
8l5939 Electric Starting Motor Assembly--R.H.--32 Volt--Part 2 Of 2
| 8L***39 | Motor As-Electric Starting | 1 |
8l5939 Electric Starting Motor Assembly--R.H.--32 Volt--Part 1 Of 2
| 8L***39 | Motor As-Electric Starting | 1 |
5l5354 Starting Motor Assembly--32 Volt--S.A.E. Standard Engine Rotation--L.H.--Part 1 Of 2
| 5L***54 | Motor Assembly--L.H. | 1 |
5l5354 Starting Motor Assembly--32 Volt--S.A.E. Standard Engine Rotation--L.H.--Part 2 Of 2
| 5L***54 | Motor Assembly--L.H. | 1 |
5l7268 Starting Motor Assembly--32 Volt--S.A.E. Opposite Standard Engine Rotation--R.H.--Part 1 Of 2
| 5L***68 | Motor Assembly--R.H.,Motor Assembly--L.H. | 1 |
5l7268 Starting Motor Assembly--32 Volt--S.A.E. Opposite Standard Engine Rotation--R.H.--Part 2 Of 2
| 5L***68 | Motor Assembly--R.H.,Motor Assembly--L.H. | 1 |
7l6913 Air Starting Motor Group--R.H.--S.A.E. Opposite Standard Engine Rotation
| 7L***13 | Motor Group-Air Starting | 1 |
7l6916 Air Starting Motor Group--L.H.--S.A.E. Standard Engine Rotation
| 7L***16 | Motor Group-Air Starting | 1 |
7l6915 Air Starting Motor Group--L.H.--S.A.E. Opposite Standard Engine Rotation
| 7L***15 | Motor Group-Air Starting | 1 |
3h3170 Air Motor--Clockwise Engine Rotation
| 3H***70 | Motor Group-Air Starting | 1 |
7l6914 Air Starting Motor Group--R.H.--S.A.E. Standard Engine Rotation
| 7L***14 | Motor Group-Air Starting | 1 |
5l2381 Radiator Mounting Group--Engine Mounted
| 5L***81 | Mounting Group-Radiator | 1 |
9m1713 Oil Pump Assembly
| 9M***13 | Oil Pump Assembly | 1 |
2h7664 Oil Pump Assembly--Type 2
| 2H***64 | Oil Pump Assembly | 1 |
2h7664 Oil Pump Assembly--Type 1
| 2H***64 | Oil Pump Assembly | 1 |
8f256 Air Starting Oiler
7l7366 Overspeed Safety Contactor Group
| 7L***66 | Overspeed Safety Contactor Group | 1 |
5l4157 Air Precleaner Group--Full View--Type 1
| 5L***57 | Precleaner Group | 1 |
5l4157 Air Precleaner Group--Type 2
| 5L***57 | Precleaner Group | 1 |
5l2618 Rack Limit Servo Shaft Group
| 5L***18 | Rack Limit Servo Shaft Group | 1 |
5l8956 Rack Solenoid Shut-Off Group--32 Volt
| 5L***56 | Rack Solenoid Shut-Off Group | 1 |
5l2451 Radiator Assembly
| 5L***51 | Radiator As | 1 |
5l2382 Radiator Group
| 5L***82 | Radiator Group | 1 |
2n3912 Engine And Generator Support Rails Group
| 2N***12 | Rail Group-Engine & Gen Support | 1 |
4l9622 Engine Support Rails Group
| 4L***22 | Rail Group-Engine Support | 1 |
6l5397 Regulator Assembly--32 Volt
| 6L***97 | Regulator As | 1 |
6l1631 Safety Alarm Contactor Group--Type 1
| 6L***31 | Safety Alarm Contactor Group | 1 |
6l1631 Safety Alarm Contactor Group--Type 2
| 6L***31 | Safety Alarm Contactor Group | 1 |
5l2578 Safety Alarm Contactor Group--Replaced By 6l1631 Shown On
| 5L***78 | Safety Alarm Contactor Group | 1 |
5l7379 Water Temperature And Oil Pressure Shut-Off Group
| 5L***78 | Safety Alarm Contactor Group | 1 |
5l7369 Safety Control Shut-Off Group--R.H.--Type 1
| 5L***69 | Safety Control Shut-Off Group | 1 |
5l7369 Safety Control Shut-Off Group--R.H.--Type 2
| 5L***69 | Safety Control Shut-Off Group | 1 |
5l9263 Safety Rack Solenoid Shut-Off Group
| 5L***63 | Safety Rack Solenoid Shut-Off Group | 1 |
5l5493 Safety Shut-Off Group--Manual--Type 2
| 5L***93 | Safety Shut-Off Group | 1 |
5l5493 Safety Shut-Off Group--Manual--Type 1
| 5L***93 | Safety Shut-Off Group | 1 |
6l2690 Stub Shaft Group--Front Mounted
| 6L***90 | Shaft Group-Stub | 1 |
6l2709 Stub Shaft Group--Rear Mounted
| 6L***09 | Shaft Group-Stub | 1 |
7l6912 Air Silencer And Vapor Arrestor Group
| 7L***12 | Silencer Group-Air Starting | 1 |
5l8039 Torque Spring Group
| 4F***51 | Spacer (.017" Thick) | 2 |
| 4F***52 | Spring (.072" Thick) | 1 |
| 5L***39 | Spring Group-Torque; Torque Spring Group | 1 |
5l7305 Glow Plug Group--32 Volt
| 5L***05 | Starting Aid Glow Plug Group | 1 |
2l1618 Starting Crank Group
| 2L***18 | Starting Crank Group | 1 |
6l2586 Starting Engine Installation Group
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 8 |
| 0S***95 | Bolt 1.25 In. (31.75 mm) Long Guard Assemblies To Radiator Guard | 4 |
6l8418 Air Starting Group--R.H.--S.A.E. Standard Engine Rotation--Replaces 6l2801
| 6L***18 | Starting Group-Air | 1 |
6l2747 Electric Starting Group--32 Volt--S.A.E. Standard Engine Rotation
| 6L***47 | Starting Motor Group-Electric | 1 |
6l2748 Electric Starting Group--32 Volt--S.A.E. Opposite Engine Rotation
| 6L***48 | Starting Motor Group-Electric | 1 |
6l1550 Single Starting Motor Group--32 Volt
| 6L***50 | Starting Motor Group-Electric; Single Motor Electric Starting Group | 1 |
5l2745 Surge Tank And Water Lines Group
| 5L***45 | Surge Tank And Water Lines Group | 1 |
5l2745 Surge Tank And Water Lines Group--Type 2
| 5L***45 | Surge Tank And Water Lines Group | 1 |
5l2745 Surge Tank And Water Lines Group--Type 3
| 5L***45 | Surge Tank And Water Lines Group | 1 |
5l8595 Solenoid Switch Assembly--Type 2
| 5L***95 | Switch As-Solenoid | 1 |
5l8595 Solenoid Switch Assembly--Type 1
| 5L***95 | Switch As-Solenoid | 1 |
5l5901 Tachometer Drive Group
| 5L***01 | Tachometer Drive Group | 1 |
7n1269 Terminal Assembly
| 7N***69 | Terminal & Plate As | 1 |
5l6677 Torque Converter Cooler Group
| 5L***77 | Torque Converter Cooler Group | 1 |
5l6678 Torque Converter Output Shaft Governor Group--Type 2
| 5L***78 | Torque Converter Output Shaft Governor Group | 1 |
5l6678 Torque Converter Output Shaft Governor Group Type 1
| 5L***78 | Torque Converter Output Shaft Governor Group | 1 |
5l6678 Torque Converter Output Shaft Governor Group--Type 3
| 5L***78 | Torque Converter Output Shaft Governor Group | 1 |
5l6678 Torque Converter Output Shaft Governor Group--Type 4
| 5L***78 | Torque Converter Output Shaft Governor Group | 1 |
5l5779 Torque Spring Group
| 4F***52 | Spring (.072" Thick) | 1 |
| 5L***79 | Torque Spring Group | 1 |
| 5M***86 | Spacer (.0220" Thick) | 1 |
6l2668 Transmission And Starter Pinion Group--S.A.E. Opposite Engine Rotation--End View--Part 2 Of 2
| 6L***68 | Transmission And Starter Pinion Group | 1 |
6l2669 Transmission And Starter Pinion Group--S.A.E. Standard Engine Rotation--Side View Part 1 Of 2
| 6L***69 | Transmission And Starter Pinion Group | 1 |
5l2205 Transmission And Starter Pinion Group--S.A.E. Opposite Engine Rotation--End View--Part 2 Of 2
| 5L***05 | Transmission And Starter Pinion Group | 1 |
5l2204 Transmission And Starter Pinion Group--S.A.E. Standard Engine Rotation--End View Part 2 Of 2
| 5L***04 | Transmission And Starter Pinion Group | 1 |
6l2669 Transmission And Starter Pinion Group--S.A.E. Standard Engine Rotation--End View Part 2 Of 2
| 6L***69 | Transmission And Starter Pinion Group | 1 |
5l2205 Transmission And Starter Pinion Group--S.A.E. Opposite Engine Rotation--Side View Part 1 Of 2
| 5L***05 | Transmission And Starter Pinion Group | 1 |
6l2668 Transmission And Starter Pinion Group--S.A.E. Opposite Engine Rotation--Side View--Part 1 Of 2
| 6L***68 | Transmission And Starter Pinion Group | 1 |
5l2204 Transmission And Starter Pinion Group--S.A.E. Standard Engine Rotation--Side View--Part 1 Of 2
| 5L***04 | Transmission And Starter Pinion Group | 1 |
8m5507 Turbocharger Assembly--2 Assemblies Required Type 1
| 8M***07 | Turbocharger Assembly | 1 |
9m3184 Turbocharger Assembly--2 Assemblies Required--Type 1
| 9M***84 | Turbocharger Assembly | 1 |
8m7149 Turbocharger Assembly--2 Assemblies Required--Type 3
| 8M***49 | Turbocharger Assembly | 1 |
3s4436 Turbocharger Assembly--2 Assemblies Required--Replaces 8m7149
| 3S***36 | Turbocharger Assembly | 1 |
7m9684 Turbocharger Assembly--2 Assemblies Required--Type 2
| 7M***84 | Turbocharger Assembly | 1 |
9m3181 Turbocharger Assembly--2 Assemblies Required Type 1
| 9M***81 | Turbocharger Assembly | 1 |
3s4439 Turbocharger Assembly--2 Assemblies Required--Replaces 8m9187
| 3S***39 | Turbocharger Assembly | 1 |
8m9200 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***00 | Turbocharger Assembly | 1 |
9m3407 Turbocharger Assembly--2 Assemblies Required--Type 2
| 9M***07 | Turbocharger Assembly | 1 |
8m9073 Turbocharger Assembly--2 Assemblies Required Type 1
| 8M***73 | Turbocharger Assembly | 1 |
8m2028 Turbocharger Assembly--2 Assemblies Required--Type 3
| 8M***28 | Turbocharger Assembly | 1 |
3s4433 Turbocharger Assembly--2 Assemblies Required--Replaces 8m2028
| 3S***33 | Turbocharger Assembly | 1 |
8m2028 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***28 | Turbocharger Assembly | 1 |
3s4441 Turbocharger Assembly--2 Assemblies Required
| 3S***41 | Turbocharger Assembly | 1 |
8m9073 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***73 | Turbocharger Assembly | 1 |
3s4434 Turbocharger Assembly--2 Assemblies Required--Replaces 8m7147
| 3S***34 | Turbocharger Assembly | 1 |
3s4435 Turbocharger Assembly--2 Assemblies Required--Replaces 8m7148
| 3S***35 | Turbocharger Assembly | 1 |
8m7149 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***49 | Turbocharger Assembly | 1 |
9m3181 Turbocharger Assembly--2 Assemblies Required--Type 2
| 9M***81 | Turbocharger Assembly | 1 |
8m7149 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***49 | Turbocharger Assembly | 1 |
7m9684 Turbocharger Assembly--2 Assemblies Required--Type 1
| 7M***84 | Turbocharger Assembly | 1 |
3s4440 Turbocharger Assembly--2 Assemblies Required--Replaces 8m9200
| 3S***40 | Turbocharger Assembly | 1 |
9m3184 Turbocharger Assembly--2 Assemblies Required--Type 2
| 9M***84 | Turbocharger Assembly | 1 |
8m7148 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***48 | Turbocharger Assembly | 1 |
8m5507 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***07 | Turbocharger Assembly | 1 |
8m9074 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***74 | Turbocharger Assembly | 1 |
8m7925 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***25 | Turbocharger Assembly | 1 |
9m3407 Turbocharger Assembly--2 Assemblies Required--Type 1
| 9M***07 | Turbocharger Assembly | 1 |
8m2028 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***28 | Turbocharger Assembly | 1 |
8m9187 Turbocharger Assembly--2 Assemblies Required Type 1
| 8M***87 | Turbocharger Assembly | 1 |
8m7147 Turbocharger Assembly--2 Assemblies Required--Type 3
| 8M***47 | Turbocharger Assembly | 1 |
8m7147 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***47 | Turbocharger Assembly | 1 |
7m9684 Turbocharger Assembly--2 Assemblies Required--Type 3
| 7M***84 | Turbocharger Assembly | 1 |
3s4442 Turbocharger Assembly--2 Assemblies Required--Replaces 9m3407
| 3S***42 | Turbocharger Assembly | 1 |
8m9187 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***87 | Turbocharger Assembly | 1 |
8m7148 Turbocharger Assembly--2 Assemblies Required--Type 3
| 8M***48 | Turbocharger Assembly | 1 |
8m9074 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***74 | Turbocharger Assembly | 1 |
8m7147 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***47 | Turbocharger Assembly | 1 |
3s4438 Turbocharger Assembly--2 Assemblies Required--Replaces 8m9074
| 3S***38 | Turbocharger Assembly | 1 |
3s4437 Turbocharger Assembly--2 Assemblies Required--Replaces 8m9073
| 3S***37 | Turbocharger Assembly | 1 |
8m9200 Turbocharger Assembly--2 Assemblies Required--Type 1
| 8M***00 | Turbocharger Assembly | 1 |
8m7148 Turbocharger Assembly--2 Assemblies Required--Type 2
| 8M***48 | Turbocharger Assembly | 1 |
8m7925 Turbocharger Assembly--2 Assemblies Required
| 8M***25 | Turbocharger Assembly | 1 |
3s4420 Turbocharger Assembly--2 Assemblies Required
| 3S***20 | Turbocharger Group | 1 |
7l6911 Air Starting Valve Group
| 7L***11 | Valve Group-Air Starting | 1 |
1l2073 Pressure Reducing Regulating Valve
| 1L***73 | Valve Group-Pressure Reducing; -Rh | 1 |
3l9922 Whistle Valve
| 3L***22 | Valve Group-Whistle | 1 |
6l2601 Water Lines Group
| 6L***01 | Water Lines Group | 1 |
5l2294 Water Lines Group
| 5L***94 | Water Lines Group | 1 |
2l1630 Water Pump Group
| 2L***30 | Water Pump Group | 1 |
5l9941 Water Temperature And Oil Pressure Shut-Off Group
| 5L***41 | Water Temperature And Oil Pressure Shut-Off Group | 1 |
5l5956 Water Temperature Shut-Off Group--Type 2
| 5L***56 | Water Temperature Shut-Off Group | 1 |
5l5956 Water Temperature Shut-Off Group
| 5L***56 | Water Temperature Shut-Off Group | 1 |
6l4246 Woodward Governor Assembly
| 6L***46 | Woodward Governor Assembly | 1 |
5l8036 Woodward Governor Group--Type 3
| 5L***36 | Woodward Governor Group | 1 |
5l4936 Woodward Governor Group--Type 2
| 5L***36 | Woodward Governor Group | 1 |
5l8036 Woodward Governor Group--Type 1
| 5L***36 | Woodward Governor Group | 1 |
5l8036 Woodward Governor Group--Type 2
| 5L***36 | Woodward Governor Group | 1 |
5l4936 Woodward Governor Group--Type 1
| 5L***36 | Woodward Governor Group | 1 |
Engine
Aftercooler
4l7643 Aftercooler Assembly
| 4L***43 | Aftercooler Assembly | 1 |
5l9945 Aftercooler Connections Group--Full Flow
| 5L***45 | Aftercooler Connections Group | 1 |
Air Cleaner--Dry Type--Rear View
Air Cleaner
Air Cleaner And Exhaust Pipe
4l4721 Air Cleaner Assembly
| 4L***21 | Air Cleaner As | 1 |
6l8413 Air Cleaner Diaphragm Replacement Group--Field Installation
| 6L***13 | Air Cleaner Diaphragm Replacement Group | 1 |
Balancer
Breather
Camshaft
Carburetor
5l7576 Carburetor Assembly--L.H.
| 5L***76 | Carburetor Assembly--L.H. | 1 |
5l7575 Carburetor Assembly--R.H.
| 5L***75 | Carburetor Assembly--R.H. | 1 |
Carburetor Control
Connecting Rod And Piston--7 : 1 Ratio--8 Required
Connecting Rod And Piston--10 : 1 Ratio--8 Required
Connecting Rod And Piston--8 Required
Crankshaft
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
Cylinder Head And Valve Mechanism--Part 1 Of 2
Cylinder Head And Valve Mechanism--Part 2 Of 2
Flexible Fuel Lines
Flywheel
Front Accessory Drive--S.A.E. Standard Rotation--Part 1 Of 2
Front Accessory Drive--S.A.E. Opposite Rotation--Part 1 Of 2
Front Accessory Drive--S.A.E. Standard Rotation--Part 2 Of 2
Front Accessory Drive--S.A.E. Opposite Rotation--Part 2 Of 2
Fuel Filter
Fuel Injection Valves And Lines
Fuel Injection Valves And Line--Top View
Fuel Injection Valves And Lines--Top View
6l4814 Fuel Lines Group--Field Installation--Type 1
| 6L***14 | Fuel Lines Group | 1 |
6l4814 Fuel Lines Group--Field Installation--Type 2
| 6L***14 | Fuel Lines Group | 1 |
Fuel Priming Pump
Fuel Pump And Governor Drive--S.A.E. Standard Rotation--Part 1 Of 2
Fuel Pump And Governor Drive--S.A.E. Opposite Rotation--Part 1 Of 2
Fuel Pump And Governor Drive--S.A.E. Standard Rotation--Part 2 Of 2
Fuel Pump And Governor Drive--S.A.E. Standard And S.A.E. Opposite Standard Engine Rotation--Part 1 Of 2
Fuel Pump And Governor Drive--S.A.E. Standard And S.A.E. Opposite Standard Engine Rotation--Part 2 Of 2
Fuel Pump And Governor Drive--S.A.E. Opposite Rotation--Part 2 Of 2
Fuel Pump Housing
4l1156 Fuel Transfer Pump Group
| 4L***56 | Fuel Transfer Pump Group | 1 |
5l6452 Gas Pressure Regulator Group
| 5L***52 | Gas Pressure Regulator | 1 |
56g451 Gas Pressure Regulator Group--Type 2
| 5L***51 | Gas Pressure Regulator Group | 1 |
5l6451 Gas Pressure Regulator Group--Type 1
| 5L***51 | Gas Pressure Regulator Group | 1 |
Gasket Kits
| 1P***36 | Valve Grinding | 0 |
| 1P***37 | Valve Grinding | 0 |
| 1P***39 | Diesel Engine Complete | 0 |
Governor And Magneto Drive--Part 2 Of 2
Governor And Magneto Drive--Part 1 Of 2
Governor Control
4l1144 Governor Group--Part 1 Of 2
| 4L***44 | Governor Group | 1 |
4l1144 Governor Group--Part 2 Of 2
| 4L***44 | Governor Group | 1 |
Ignition
5l3472 Ignition Group
| 5L***72 | Ignition Group | 1 |
4l5852 Inlet Valve And Cover Assembly
| 4L***52 | Inlet Valve And Cover Assembly | 1 |
Instrument And Panel Mounting
Lifting Eye
5l6548 Magneto
| 5L***48 | Magneto | 1 |
5l9419 Magneto
| 5L***19 | Magneto | 1 |
Magneto Drive
Manifolds--Top View
5l3460 Mechanical Governor Group--Part 3 Of 3
| 5L***60 | Mechanical Governor Group | 1 |
5l3460 Mechanical Governor Group--Part 2 Of 3
| 5L***60 | Mechanical Governor Group | 1 |
5l3460 Mechanical Governor Group--Part 1 Of 3
| 5L***60 | Mechanical Governor Group | 1 |
Oil Cooler And Lines--Part 1 Of 2
Oil Cooler And Lines--Part 2 Of 2
3n4631 Oil Filter Change Indicator--Field Installation
| 3N***31 | Oil Filter Change Indicator | 1 |
6l1583 Oil Filter Group
| 6L***83 | Oil Filter Group | 1 |
4l1141 Oil Filter Group
| 4L***41 | Oil Filter Group | 1 |
Oil Pan Base
5l3022 Oil Pump Assembly
| 5L***22 | Oil Pump Assembly | 1 |
5l5993 Oil Pump Assembly
| 5L***93 | Oil Pump Assembly | 1 |
Connecting Rod And Piston (5l4746 N/S)--8 Required--Type 2
| 5L***46 | Piston & Rod Group | 1 |
4l8232 Pump
| 4L***32 | Pump As-Fuel Priming; Fuel Priming Pump Assembly | 1 |
4l8800 Water Pump Group
| 4L***00 | Pump Group-Water; Fresh Water Pump Group | 1 |
5l5356 Raw Water Aftercooler Assembly
| 5L***56 | Raw Water Aftercooler Assembly | 1 |
Raw Water Lines
6l4770 Raw Water Lines Group
| 6L***70 | Raw Water Lines Group | 1 |
6l4754 Raw Water Pump Group--Type 1
| 6L***54 | Raw Water Pump Group; Sea Water Pump Group | 1 |
6l4754 Raw Water Pump Group--Type 2
| 6L***54 | Raw Water Pump Group; Sea Water Pump Group | 1 |
5l1651 Raw Water Pump Group
| 5L***51 | Raw Water Pump Group; Auxiliary Water Pump Group | 1 |
5l2591 Regulator Assembly
| 5L***91 | Regulator Assembly | 1 |
5n3090 Elbow Replacement Group--Oil Cooler Provides Field Replacement For 4l6235 Shown On Pages 98, 100, 102a & 103
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
| 3L***08 | Spacer-Bracket To Cylinder Block Cover; Spacer Bracket To Cylinder Block Cover | 2 |
4l8129 Safety Control Shut-Off Group--Sectional View Of Housing--Part 3 Of 3
| 4L***29 | Safety Control Shut-Off Group | 1 |
4l8129 Safety Control Shut-Off Group
| 4L***29 | Safety Control Shut-Off Group | 1 |
4l8129 Safety Control Shut-Off Group--R.H. And L.H.--Part 1 Of 3
| 4L***29 | Safety Control Shut-Off Group | 1 |
4l8129 Safety Control Shut-Off Group--Sectional View Of Housing--Part 2 Of 3
| 4L***29 | Safety Control Shut-Off Group | 1 |
Service Meter (6l2987 N/S)
| 6L***87 | Service Meter | 1 |
Service Meter
6l2965 Service Meter Group--S.A.E. Standard Rotation
| 6L***65 | Service Meter Group | 1 |
6l2976 Service Meter Group--Type 1
| 6L***76 | Service Meter Group | 1 |
6l2976 Service Meter Group--Type 2
| 6L***76 | Service Meter Group | 1 |
5l1498 Oil Pressure And Overspeed Housing Group--Part 1 Of 2
| 5L***98 | Shut-Off Group | 1 |
5l1498 Oil Pressure And Overspeed Housing Group--Part 2 Of 2
| 5L***98 | Shut-Off Group | 1 |
5l5503 Tachometer Drive Group
| 5L***03 | Tachometer Drive Group | 1 |
8m1780 Turbocharger Assembly--2 Assemblies Required
| 8M***80 | Turbocharger Assembly | 1 |
Turbocharger Lubrication Valve
6l3175 Turbocharger Lubrication Valve Group
| 6L***75 | Turbocharger Lubrication Valve Group | 1 |
Turbocharger Mounting
Turbochargers
Water Lines
Self-Regulated Generators
5l3964 Generator--2400 Volt--60 Cycle, 3 Phase--Side View Part 1 Of 2
| 5L***64 | Generator | 1 |
5l3963 Generator--240/480 Volt--60 Cycle At 1200 R.P.M., 3 Phase--Side View Part 1 Of 2
| 5L***63 | Generator | 1 |
5l3963 Generator--240/480 Volt--60 Cycle At 1200 R.P.M., 3 Phase--End View Part 2 Of 2
| 5L***63 | Generator | 1 |
5l3964 Generator--2400 Volt--60 Cycle, 3 Phase--End View Part 2 Of 2
| 5L***64 | Generator | 1 |
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
Name Plates, Tool And Transfers
| 0L***03 | Wrench 9/16" "T" Handle Socket | 1 |
| 2M***31 | Plate; Serial Number On R.H. Side Of Cylinder Block And R.H. Side Of Loader Frame | 1 |
| 4B***59 | Drive Screw Serial Number Plate | 2 |
6l6118 Static Exciter And Regulator Assembly--Top View--Part 1 Of 2
| 6L***18 | Static Exciter And Regulator Assembly | 1 |
6l6118 Static Exciter And Regulator Assembly--Top View--Part 2 Of 2
| 6L***18 | Static Exciter And Regulator Assembly | 1 |
5l8059 Static Exciter And Regulator Assembly--Top View--Part 2 Of 2
| 5L***59 | Static Exciter And Regulator Assembly | 1 |
5l8059 Static Exciter And Regulator Assembly--Top View--Part 1 Of 2
| 5L***59 | Static Exciter And Regulator Assembly | 1 |
4l1560 Tool Group
| 4L***60 | Tool Group | 1 |
9s7977 Tool Group
| 9S***77 | Tool Group-Hand | 1 |
D379 serial number reference
The PIN/serial plate on these D379-family industrial and marine engines is riveted or stamped to the cylinder block, commonly on the left side near the flywheel housing (marine units may also carry a duplicate tag on the control panel or reduction gear). Read the first three characters as the prefix, which ties the unit to a model and build series; the following digits are the unit's sequence number within that series. A letter suffix on the model name itself (D379, D379A, D379B) marks a factory revision and does not always map to a clean, separate prefix range - confirm generation with a dealer when it matters for parts.
| Prefix | Identifies | Notes |
|---|---|---|
| 68B | D379 / D379B industrial engine | Turbocharged industrial diesel used for prime power, pump, and compressor drive. Two independent parts-reference charts list this range against both the base D379 and D379B industrial engine, so the exact generation split within 68B is not documented separately - treat as spanning both. |
| 76B | D379 / D379B industrial engine | Same industrial application as 68B (mechanical drive, generator drive, standby power). Confirmed across independent parts-reference charts against both D379 and D379B industrial engine; the generation boundary within the range is not documented - varies by configuration/series. |
| 34Z | D379B generator set engine | Confirmed against factory service-information documentation as D379B generator set engine, 34Z00001-and-up. A used-engine listing carrying this prefix was badged simply D379 (generator drive), so the exact base-vs-B badging split is unconfirmed, but the generator-set application itself is solid. |
| 69B | D379A / D379B marine engine | Marine propulsion application, air start, hydromechanical governor. A real stamped serial in this range appeared on a plain-badged D379 marine unit rated 715 hp, while parts-reference charts split the same range across D379A and D379B marine engine listings - letter suffix badging is inconsistent across sources, confirm the exact generation with a dealer. |
| 8TC | D379B marine engine | Marine engine application, cited against D379B in more than one parts-reference listing. This same three-character combination is also documented elsewhere against an unrelated on-highway truck engine, so treat the D379B tie as likely but confirm with a dealer before relying on it for parts lookup. |
Frequently asked questions
What engine does the Caterpillar D379 use?
The D379 is itself the engine, not a machine that carries one. It is a mechanical four-stroke V8 diesel from Caterpillar's 159 mm (6.25 in) bore Vee-engine family, the same architecture shared with the V12 D398 and V16 D399 and their gas-fueled G379/G398/G399 counterparts. Caterpillar built it in naturally aspirated and turbocharged-aftercooled (TA) versions, rated roughly 500-750 hp depending on arrangement and duty cycle, at 1,000-1,200 rpm.
What is the D379's operating weight?
Caterpillar published the D379 as a bare power unit, not a chassis, so there is no factory operating-weight figure the way there would be for a complete machine. Documented bare-engine weights run roughly 4,760-5,100 kg (10,500-11,240 lb) depending on accessories fitted, such as radiator, torque converter, or starting system; a packaged genset or drilling-rig power unit built around it weighs more once skid, cooling, and control gear are added.
What replaced the Caterpillar D379?
No single factory-named successor is documented for the D379. It belongs to Caterpillar's vintage 159 mm-bore Vee-engine family alongside the D398 and D399, produced through the 1960s and 1970s before Caterpillar's industrial and marine V8/V12 lineup moved on to the 3400-series engines. Some owners of D379-powered rigs and vessels have repowered with a later Cat engine once mechanical-injection and governor rebuild support got thin, but that is an owner's choice, not a documented factory succession.
What D379 owners discuss
What kind of engine is the Caterpillar D379, and what horsepower should I expect?
The D379 is a V-8, four-stroke diesel in Caterpillar's big industrial engine family, related to the D346, D353, D364 and D375. Later-series D379 blocks carry a 159 mm (6.25 in) bore and 203 mm (8.00 in) stroke, up from the 146 mm (5.75 in) bore used on the earlier D364/D375 in the same lineage. Reported output for D379-based power units ranges from roughly 400 kW (540 hp) up to about 560 kW (750 hp), at rated speeds between 1000-1200 rpm, depending on aftercooling and duty rating. Treat any single horsepower figure as configuration-specific and confirm it against the rating plate rather than a parts listing.
What fuel system and governor issues come up most with this generation of engine?
Owners and shops working on this family of mechanical, direct-injection engines report the same failure pattern: dirty or water-contaminated fuel, or long periods sitting idle, lets gum and varnish build up in the injection pump and the fuel rack starts to stick. Symptoms are hard starting, uneven cylinder balance, and a hydra-mechanical governor that hunts instead of settling at a set speed. The usual fix is clean, water-free fuel, cycling the rack by hand before starting a long-stored unit, and having the injection pump and governor checked by a shop set up for mechanical unit pumps. Have your dealer verify governor and fuel-rack calibration before returning a long-stored engine to full load.
How many hours does a D379 typically run before it needs an overhaul, and what wear should I watch for?
Independent D379-specific overhaul data is thin, so owners lean on the wider family of similar-era big Cat industrial V-engines for a benchmark. A commonly cited pattern for this class of mechanical, direct-injected industrial engine is a top-end inspection somewhere around 6,000-12,000 hours and a full inframe or overhaul in the 14,000-30,000-hour range, with the low end tied to dirty fuel and poor warm-up/cool-down habits and the high end tied to consistent oil analysis, clean filtration, and proper duty cycle. Actual interval varies by series and application, so use oil analysis trends and a compression or blow-by check to judge condition rather than relying on hours alone.
Does the D379 have any electrical or sensor issues to worry about?
This is a mechanical-governor, pre-electronic engine, so there is no ECM and no fault-code system behind it. The electrical items that actually fail in service are the starting and charging circuit (starter solenoid, charging alternator or generator) and the package-level safety devices fitted to oilfield rig and generator-set installations: low-oil-pressure and overspeed shutdown switches, water-temperature senders, and the magnetic pickup feeding the tachometer. A shutdown that trips under load should be treated as a real oil-pressure or overspeed event first, not written off as a faulty switch, until the device itself is bench-tested. Have your dealer verify any overspeed or low-oil-pressure shutdown device before returning the engine to unattended rig or genset service.
What is different about the later 6.25-inch-bore D379 versus the earlier D364/D375 it descended from?
On the later, larger-bore series, the lubrication pump is a skeleton-type unit built into the vee valley cover rather than a separate bolt-on housing, and the engine has no self-contained oil sump of its own - the oil system lives in the block and valley casting. Mechanics familiar with this engine family flag this as a common point of confusion when sourcing a gasket set or pump for overhaul, since the arrangement does not interchange with the separate-sump layout used on some other Cat V8s from the same period. Confirm the exact valley-cover and pump arrangement against the engine's own serial prefix before ordering gaskets or a replacement pump.
Where does the D379 typically show up in service, and does that affect what a buyer sees?
Field listings and industry references place the D379 mainly in oilfield drilling power packages, marine propulsion, and industrial generator sets in roughly the 400-500 kW class, rather than as a factory dozer or scraper engine - the similarly sized D353 filled that crawler-tractor role in the same era. That means most used D379 units surface as bare power units or genset packages rather than as installed machine engines, and the accessory drive, cooling package (radiator versus remote heat exchanger versus keel cooling) and aftercooling hardware will differ a lot between a drilling-rig unit, a marine unit, and a genset built off the same base engine.
What should I check when buying a used Caterpillar D379?
Pull the serial or arrangement number and confirm it against the actual bore/stroke and rating you are being quoted, because published specs for this engine vary noticeably between listings and the family shares numbering conventions with visually similar D353/D364/D375 blocks. Ask for recent oil analysis and, where possible, a compression or blow-by check rather than relying on hour-meter readings alone. Confirm whether the unit came from oilfield, marine, or generator-set duty, since that changes the cooling and aftercooling hardware included with it. Check the fuel rack and governor linkage for free movement, especially on a unit that has sat idle, and confirm all package safety shutdowns are present and functional. Have your dealer verify the arrangement number and rating-plate data before settling on a price based on advertised horsepower.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific D379 part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.