Caterpillarengine - marinemarine engine
Caterpillar D333A
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar D333A is a mechanical, naturally aspirated inline-six diesel engine built for marine propulsion, generator-set, and industrial mechanical-drive duty rather than as a mobile machine in its own right. It runs a 114.3 mm x 139.7 mm (4.5 in x 5.5 in) bore and stroke for roughly 8.6 liters (525 cu in) of displacement, with a dry engine block weighing on the order of 900-1,000 kg (2,000-2,200 lb) before accessories. It belongs to the D330/D333 mechanical-diesel family that Caterpillar produced through the 1960s, with the D333A/B generation running until roughly 1968 before giving way to the larger-bore D333C. Marine installations were offered raw-water-cooled or keel-cooled, paired with a reverse/reduction marine gear, while industrial and genset versions used radiator or heat-exchanger cooling depending on the rating.
The main change across the family was mechanical: the D333A/B generation used a 4.5 in bore and belt- or engine-driven water pump arrangements, while the D333C that followed increased bore to 4.75 in (120.7 mm) and moved to a gear-driven jacket water pump, a transitional step toward the 3304/3306 engines that eventually absorbed this platform. Horsepower ratings within the D330/D333 family spanned naturally aspirated, turbocharged, and turbocharged-aftercooled configurations depending on application and duty rating, so output varies by build rather than by a single figure. In today's used and parts market, the D333A matters because it is a fully mechanical engine with no ECM, no electronic governor, and no emissions aftertreatment - a draw for owners of older commercial and pleasure craft, tugs, and standby gensets who want to keep a running mechanical diesel in service. Dealer counter stock is thin at this age; keeping one running increasingly depends on remachined cores, rebuilt injection components, and machine-shop work rather than new parts.
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 D333A specifications
Engine
| Engine model / generation | D333A, inline 6-cylinder, 4-stroke mechanical diesel. Part of the D330/D333 family that preceded the larger-bore D333C generation (later carried into the 3306). Marine version built on the same base block used in period construction-equipment and generator-set applications, dressed with marine cooling and reduction gear. |
| Bore x stroke | 114.3 mm x 139.7 mm (4-1/2 in x 5-1/2 in) |
| Displacement | 8.6 L (525 cu in) |
| Aspiration | Naturally aspirated in base form. Turbocharged units were also built on the same 8.6 L block — do not confuse turbo components or ratings with the later, larger-bore D333C 10.5 L block. |
| Gross/net power | No confirmed marine propulsion rating documented for this exact configuration. Same-bore engine in period construction equipment (wheel loader, motor grader) carried ratings around 104-112 kW (140-150 hp) at 1900-2200 rpm — reference only, not a confirmed marine plate rating. Verify against the engine's actual rating plate or dealer records. |
| Emissions tier | Pre-regulation mechanical diesel. No emissions certification tier applies (predates EPA/Tier standards). |
Weights
| Bare (long block) engine weight | Approx. 907-998 kg (2,000-2,200 lb) dry for a complete long block. This figure does not include marine reduction gear, heat exchanger, or other marine dress components. |
| Marine-dressed operating weight | Not documented in available service literature — varies with reduction-gear ratio and cooling package. Verify with dealer or installation manual. |
Dimensions
| Overall length/width/height | Not documented in available service literature for the marine-dressed configuration. Verify with dealer or the marine installation drawing for the specific reduction-gear and heat-exchanger package fitted. |
Performance
| Rated engine speed | Not documented as a confirmed marine rating. Same-family industrial/vehicle applications of this bore ran rated speeds in the 1900-2350 rpm range depending on duty cycle and application — treat as reference only. |
Service capacities (summary)
| Engine oil (sump) | Approx. 23-26 L (6-7 US gal). Figures vary with oil pan and filter configuration across applications; treat as a range, not a fixed figure. |
| Cooling system | Not documented — marine installations use a heat exchanger/keel-cooling package sized to the vessel, not a fixed engine-only figure. Verify with dealer or installation manual. |
| Fuel tank | Not applicable as an engine-level spec — marine fuel tank capacity is vessel-installed and set by the boat builder, not the engine manufacturer. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
D333A fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | approx. 25-26.5 L (6.5-7 US gal) to the full mark; exact figure varies by oil pan and filter arrangement across D333A serial-prefix ranges — treat as approximate and confirm dipstick full mark on the specific unit | Caterpillar heavy-duty diesel engine oil, single-grade: SAE 30 for temperate ambient conditions; SAE 10W for cold-weather starting below roughly 0C (32F); SAE 40 for sustained high-ambient service above roughly 32C (90F) |
| Cooling system (jacket / fresh-water circuit) | not documented for this exact configuration in available sources — fill volume depends on whether the installation uses a keel cooler or a heat-exchanger/raw-water setup; verify against the hull builder's cooling schematic for the specific vessel | Caterpillar-recommended full-strength ethylene-glycol base antifreeze/coolant with a supplemental coolant additive, mixed per era-correct heavy-duty diesel cooling practice; the raw-water side (keel cooler or heat exchanger) runs untreated sea or lake water and is separate from the coolant fill |
| Fuel tank | not specified by the engine operation and maintenance manual — marine fuel tank capacity is set by the vessel/hull builder, not the engine itself | Caterpillar-recommended No. 2-D diesel fuel or equivalent distillate fuel meeting the engine's fuel specification |
| Marine gear / reduction-reverse gear (if fitted) | not documented for a D333A-specific pairing — the reduction/reverse gear is typically a separate manufacturer's unit sized to the installation; consult that unit's own oil-level chart for its fill volume | Caterpillar-recommended transmission/drive-train oil (heavy-duty gear-oil equivalent), viscosity graded to ambient temperature per the gear unit's own chart |
| Grease (chassis and linkage points, spec only) | spec only — no fill capacity applies | Caterpillar-recommended multipurpose grease, NLGI No. 2 consistency, for general lubrication points |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar D333A maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
| Every 12,000 h |
|
Servicing the D333A beyond the schedule
Predictive Maintenance & Fluid Analysis
Run periodic oil sampling to catch wear-metal trends before bearing failure - this mechanical engine has no ECM or onboard diagnostics, so lab analysis is the main early-warning tool available. Test coolant for corrosion-inhibitor depletion; low inhibitor accelerates wet-liner cavitation pitting, a known wear mode on this bore and stroke. Track the raw-water inlet-to-outlet temperature rise across the heat exchanger to catch early fouling before it affects operating temperature. Watch zinc anode consumption rate - fast wasting points to a stray-current or bonding problem worth chasing before it reaches the block or marine gear.
Corrective & Common Repairs
Raw-water pump impeller wear and shaft-seal weeping are the most common corrective jobs on D333A marine installs; inspect at every service interval. Precombustion chamber erosion shows up as hard starting and white smoke - replace the chamber instead of chasing injection timing. Exhaust elbow and manifold corrosion from raw-water mixing is a recurring wet-exhaust failure point; check for pinholes and salt scale. Governor linkage wear causes speed hunting; clean and re-bush before condemning the governor. Marine gear output seals leak with age; reseal at the first sign of bilge oil.
Overhaul & Rebuild Points
Blocks are now decades old, so expect to line-bore for main bearing wear and reface the head at a full overhaul. Wet liners often need sleeving or oversizing rather than simple honing at this age; check the liner counterbore for corrosion during teardown. Injection pumps and injection valves rarely come off a dealer shelf anymore, so budget for remachined cores or shop-tested used units instead of new replacements. Precombustion chambers and valve seats are routine wear items at every rebuild. Crankshaft regrind is common on engines run long past their last full teardown.
Seasonal & Environment Servicing
Before haul-out or lay-up, drain the raw-water side of the heat exchanger and jacket to prevent freeze-cracking in cold climates; this engine carries no factory antifreeze protection on the raw-water circuit. Fog cylinders through the intake for lay-ups longer than a season. Replace zinc anodes before recommissioning, since a season of galvanic wasting is normal in salt water. Clear the raw-water strainer and check the seacock before first start. Re-check flexible engine mounts and marine gear alignment after any haul-out, since hull flex during blocking can load the coupling.
D333A common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 9M-0530 | Oil Filter Assembly | Lubrication service | Check fitment → |
| 4M-8207 | Oil Filter Assembly | Lubrication service | Check fitment → |
| 7M-7672 | Oil Filter Assembly | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
D333A fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| Low Oil Pressure Shutdown | Oil pressure contactor switch closes when crankcase oil pressure drops below the safe minimum, signaling the fuel rack shutoff solenoid to stop the engine | Worn oil pump, blocked pump pickup, stuck oil cooler bypass valve, low oil level, or a contactor switch out of adjustment | Check oil level and condition first, inspect the pump pickup and cooler bypass valve, then verify the contactor switch setting before resetting and restarting |
| High Water Temperature Shutdown | Water temperature contactor switch closes on excess coolant temperature, signaling the fuel rack shutoff solenoid to stop the engine; the switch self-resets once the engine cools | Low coolant level, restricted heat exchanger or radiator flow, failed belt-driven water pump, or a stuck thermostat | Let the engine cool, check coolant level and raw-water/heat exchanger flow, inspect the water pump drive belt and thermostat before restarting |
| Overspeed Shutdown | Overspeed contactor switch, mounted on the tachometer drive, closes when engine rpm exceeds the governor's safe limit and signals the fuel rack shutoff solenoid | Governor linkage malfunction, sudden loss of generator load, or fuel rack sticking toward the fuel-on position | Inspect governor linkage and fuel rack for free movement, confirm load conditions, then manually reset the overspeed switch button before restarting |
| General Safety Shutdown (single red panel lamp) | Any one of the shutdown contactors - oil pressure, water temperature, overspeed, or a remote manual switch - energized the fuel rack shutoff solenoid; the cranking panel shows one common red lamp for any cause | Any of the low oil pressure, high water temperature, or overspeed conditions above, or an operator-initiated remote shutdown | Check each contactor and gauge individually (oil pressure, water temperature, tachometer) since the lamp alone does not identify which condition tripped |
| Overcrank / Failure to Start | Automatic start-stop cranking cycle fails to start the engine within its allotted cranking attempts and cranking halts | Interrupted fuel supply, weak starting batteries, fouled injectors, or air in the fuel system | Check the fuel pressure switch circuit and battery condition, bleed the fuel system, and confirm starter engagement before attempting another start |
| Fuel Pressure Switch Lockout | Fuel pressure switch in the shutoff circuit blocks re-energizing the fuel rack shutoff solenoid (keeping the engine in run) unless fuel pressure is present, guarding against a restart with no fuel delivery | Fuel transfer pump failure, clogged fuel filter, or air in the fuel lines | Check primary fuel pump output and filter condition before attempting to reset and restart |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
D333A attachments & work tools
Work tool / implement attachments
No work-tool or implement attachment ecosystem applies to this model. The D333A is a stationary/marine diesel engine (6-cylinder, roughly 114 mm/4.5 in bore x 140 mm/5.5 in stroke), not a mobile machine with a hydraulic quick-coupler or work-tool circuit. It does not accept buckets, forks, grapples, augers, or other excavator/loader-style attachments. Treat any attachment-guide content for this identity as empty by design, not a research gap.
Marine propulsion driveline configuration
Where installed for shaft-drive propulsion, engines of this D333 family were paired with a separate marine reverse/reduction gear (clutch and reduction unit) rather than any work-tool interface. Documented reduction-gear pairings and ratios for this era of Cat marine engine vary by installation and are not confirmed specifically for the D333A; treat any specific ratio as unverified.
Auxiliary/genset power-take-off configuration
D333-family engines were also configured as diesel generator sets (engine coupled to a generator end) for ship-service or auxiliary power rather than propulsion. Power ratings cited in surviving listings for the broader D333 line vary widely (roughly 150 to 250 hp-class outputs depending on generator pairing and speed setting), and none could be confirmed as specific to the D333A sub-variant versus its D333/D333B/D333C siblings, so treat any generator kW/RPM figure as approximate and configuration-dependent.
Cooling system configuration
Marine diesels of this vintage and class were typically offered with either heat-exchanger (fresh-water) cooling or raw-water/keel cooling depending on vessel installation. No source ties a specific cooling configuration to the D333A by name, so this is noted as a plausible era-typical option rather than a confirmed factory offering.
All D333A assemblies by section
Every catalogued assembly group for the Caterpillar D333A. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
4l8467 Air Cleaner Cap Group
| 4L***67 | Air Cleaner Cap Group | 1 |
5l2130 Air Filter Indicator Group
| 5L***30 | Air Filter Indicator Group | 1 |
7l7416 Air Filter Indicator Group--Replaces 7l6784
| 7L***16 | Air Filter Indicator Group | 1 |
7l6784 Air Filter Indicator Group--Replaces 5l2130
| 7L***84 | Air Filter Indicator Group | 1 |
3l517 Air Motor
| 3L***17 | Air Motor | 1 |
3l7506 Air Starting Motor Assembly
| 3L***06 | Air Motor Assembly | 1 |
5l2233 Air Starting Arrangement
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***32 | Air Starting Motor Group | 1 |
| 5L***33 | Air Starting Arrangement | 1 |
5l2479 Air Starting Arrangement
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***79 | Air Starting Arrangement | 1 |
| 5L***80 | Air Starting Motor Group | 1 |
4l1806 Air Starting Arrangement
| 3L***79 | Fuel Priming Pump Group | 1 |
| 4L***02 | Air Starting Motor Group | 1 |
| 4L***06 | Air Starting Arrangement | 1 |
7l8425 Air Starting Motor Assembly
| 7L***25 | Air Starting Motor Assembly | 1 |
5l2231 Air Starting Motor Assembly
| 5L***31 | Air Starting Motor Assembly | 1 |
5l2232 Air Starting Motor Group
| 5L***32 | Air Starting Motor Group | 1 |
7l8250 Air Starting Motor Group
| 7L***50 | Air Starting Motor Group | 1 |
4l1802 Air Starting Motor Group
| 4L***02 | Air Starting Motor Group | 1 |
5l2480 Air Starting Motor Group
| 5L***80 | Air Starting Motor Group | 1 |
3l6314 Alarm Contactor Group--1/4" Pipe Thread--Type 1
| 3L***14 | Alarm Contactor Group | 1 |
3l6314 Alarm Contactor Group--1/4" Pipe Thread--Type 2
| 3L***14 | Alarm Contactor Group | 1 |
5l1243 Generator Assembly--32 Volt, 60 Ampere--Type 1
| 5L***43 | Alternator As | 1 |
5l1243 Alternator Assembly--32 Volt, 60 Ampere--Type 2
| 5L***43 | Alternator As | 1 |
4l7805 Alternator Assembly--12 Volt, 60 Ampere
| 4L***05 | Alternator Assembly | 1 |
5l6468 Alternator Assembly--24 Volt, 60 Ampere
| 5L***68 | Alternator Assembly | 1 |
5l6223 Alternator Group--32 Volt, 60 Ampere--Type 2
| 5L***23 | Alternator Group | 1 |
6l2226 Alternator Group--12 Volt, 60 Ampere--Type 2
| 6L***26 | Alternator Group | 1 |
5l6223 Alternator Group--32 Volt, 60 Ampere--Type 1
| 5L***23 | Alternator Group | 1 |
6l2227 Alternator Group--24 Volt, 60 Ampere--Type 2
| 6L***27 | Alternator Group | 1 |
6l2227 Alternator Group--24 Volt, 60 Ampere--Type 1
| 6L***27 | Alternator Group | 1 |
6l2226 Alternator Group--12 Volt, 60 Ampere--Type 1
| 6L***26 | Alternator Group | 1 |
3h756 Ammeter Group--Pilot House
| 3H***56 | Ammeter Group | 1 |
4l1799 Auxiliary Drive Group--1 : 1 Ratio--Type 2
| 4L***99 | Auxiliary Drive Group | 1 |
4l1799 Auxiliary Drive Group--1 : 1 Ratio--Type 1
| 4L***99 | Auxiliary Drive Group | 1 |
1l5664 Battery Group--24 Volt, 120 Ampere Hours
| 1L***64 | Battery Group | 1 |
1l5662 Battery Group--32 Volt--120 Ampere Hours
| 1L***62 | Battery Group | 1 |
1h1342 Battery Group--32 Volt--200 Ampere Hours
| 1H***42 | Battery Group | 1 |
1l5663 Battery Group--30 Volt--170 Ampere Hours
| 1L***63 | Battery Group | 1 |
1h1341 Battery Group--24 Volt--200 Ampere Hours
| 1H***41 | Battery Group | 1 |
9f6028 Battery Group--24 Volt, 170 Ampere Hours
| 9F***28 | Battery Group | 1 |
5l9326 Bellows Coupling Group
| 5L***26 | Bellows Coupling Group | 1 |
4l1800 Bilge Pump And Auxiliary Drive Arrangement
| 4L***99 | Auxiliary Drive Group | 1 |
| 4L***00 | Bilge Pump & Auxiliary Drive Arrangement | 1 |
| 4L***03 | Bilge Pump Group | 1 |
4l1803 Bilge Pump Group
| 4L***03 | Bilge Pump Group | 1 |
5l8091 Air Cleaner Cap Group
| 5L***91 | Cap Group-Air Cleaner; Air Cleaner Cap Group | 1 |
2f8223 Clutch Assembly
| 2F***23 | Clutch As | 1 |
5l5898 Direct Electric Starting Arrangement--12 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***97 | Motor And Wiring Group | 1 |
| 5L***98 | Direct Electric Starting Arrangement | 1 |
5l5869 Direct Electric Starting Arrangement--12 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***68 | Motor And Wiring Group | 1 |
| 5L***69 | Direct Electric Starting Arrangement | 1 |
5l4494 Direct Electric Starting Arrangement--32 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***93 | Motor And Wiring Group | 1 |
| 5L***94 | Direct Electric Starting Arrangement | 1 |
5l7431 Dual Panel Group--24 Or 32 Volt
| 5L***31 | Dual Panel Group | 1 |
5l7430 Dual Panel Group--12 Volt
| 5L***30 | Dual Panel Group | 1 |
6l2101 Dual Panel Group--Mechanical Instruments--12 Volt
| 6L***01 | Dual Panel Group | 1 |
6l2103 Dual Panel Group--Electrical Instruments--24 Or 32 Volt
| 6L***03 | Dual Panel Group | 1 |
5l9893 Dual Panel Group--12 Volt
| 5L***93 | Dual Panel Group | 1 |
6l2102 Dual Panel Group--Electrical Instruments--12 Volt
| 6L***02 | Dual Panel Group | 1 |
5l7660 Exhaust Elbow Group--4 Inch Dry
| 5L***60 | Elbow Group; Elbow Gp-Exhaust | 1 |
5l7661 Exhaust Elbow Group--5 Inch Dry
| 5L***61 | Elbow Group-Exhaust; Exhaust Elbow Group | 1 |
5l4491 Motor And Wiring Group--32 Volt
| 5L***91 | Electric Motor And Wiring Group | 1 |
3l9118 Direct Electric Starting Arrangement--24 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 3L***52 | Print Of Wiring Diagram | 1 |
| 3L***18 | Electric Starting Arrangement | 1 |
5l4492 Electric Starting Arrangement--32 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***91 | Electric Motor And Wiring Group | 1 |
| 5L***92 | Electric Starting Arrangement | 1 |
5l2489 Electric Starting Arrangement--24 Volt
| 3L***79 | Fuel Priming Pump Group | 1 |
| 5L***89 | Electric Starting Arrangement | 1 |
| 5L***90 | Electric Starting Motor Group | 1 |
3l5683 Electric Starting Motor Assembly--24 Volt
| 3L***83 | Electric Starting Motor | 1 |
5l4169 Electric Starting Motor Assembly--12 Volt--Part 2 Of 2
| 5L***69 | Electric Starting Motor Assembly | 1 |
5l4513 Electric Starting Motor Assembly--32 Volt--Part 2 Of 2
| 5L***13 | Electric Starting Motor Assembly | 1 |
5l5867 Electric Starting Motor Assembly--12 Volt--Part 1 Of 2
| 5L***67 | Electric Starting Motor Assembly | 1 |
5l4169 Electric Starting Motor Assembly--12 Volt--Part 1 Of 2
| 5L***69 | Electric Starting Motor Assembly | 1 |
5l4513 Electric Starting Motor Assembly--32 Volt--Part 1 Of 2
| 5L***13 | Electric Starting Motor Assembly | 1 |
5l4171 Electric Starting Motor Assembly--32 Volt--Part 1 Of 2
| 5L***71 | Electric Starting Motor Assembly | 1 |
5l5867 Electric Starting Motor Assembly--12 Volt--Part 2 Of 2
| 5L***67 | Electric Starting Motor Assembly | 1 |
5l4171 Electric Starting Motor Assembly--32 Volt--Part 2 Of 2
| 5L***71 | Electric Starting Motor Assembly | 1 |
5l2490 Electric Starting Motor Group--Type 1
| 5L***90 | Electric Starting Motor Group | 1 |
5l2490 Electric Starting Motor Group--24 Volt--Type 2
| 5L***90 | Electric Starting Motor Group | 1 |
4l2354 Electric Tachometer Group--Remote Mounted
| 3L***12 | Tachometer Drive Group | 1 |
| 4L***53 | Tachometer Group-Electric; Electric Tachometer Group | 1 |
| 4L***54 | Electric Tachometer Group | 1 |
5l8669 Exhaust Elbow Group--6 Inch
| 5L***69 | Exhaust Elbow Group | 1 |
5l8669 Exhaust Elbow Group
| 5L***69 | Exhaust Elbow Group | 1 |
5l8668 Exhaust Elbow Group--5 Inch
| 5L***68 | Exhaust Elbow Group | 1 |
5l8667 Exhaust Elbow Group--4 Inch
| 5L***67 | Exhaust Elbow Group | 1 |
2l774 Exhaust Fitting Group
| 2L***74 | Exhaust Fitting Group | 1 |
4l3826 Exhaust Fitting Group--Tapped
| 4L***26 | Exhaust Fitting Group | 1 |
5l9473 Exhaust Fitting Group--6 Inch
| 5L***73 | Exhaust Fitting Group | 1 |
4l3614 Exhaust Fitting Group
| 4L***14 | Exhaust Fitting Group | 1 |
4l3827 Exhaust Fitting Group--Flexible
| 4L***27 | Exhaust Fitting Group | 1 |
8h4681 Primary Fuel Filter Group
| 8H***81 | Filter Group-Primary Fuel; Primary Fuel Filter Group | 1 |
5l8601 Exhaust Flange Group--6 Inch
| 5L***01 | Flange Group-Exhaust; Exhaust Flange Group | 1 |
5l8592 Exhaust Flange Group--4 Inch
| 5L***92 | Flange Group-Exhaust | 1 |
5l8717 Flexible Exhaust Connections Group
| 5L***17 | Flexible Exhaust Connection Group | 1 |
3l6641 Flexible Fuel Lines Group
| 3L***41 | Flexible Fuel Lines Group | 1 |
3l4837 Front Auxiliary Drive Group--Crankshaft
| 3L***37 | Front Auxiliary Drive Group | 1 |
3l9198 Front Power Take-Off Group--1 : 1 Ratio--Engine Rotation
| 3L***98 | Front Power Take-Off Group | 1 |
5l6259 Front Power Take-Off Group--1 : 1 Ratio--Engine Rotation
| 5L***59 | Front Power Take-Off Group | 1 |
3l6579 Fuel Priming Pump Group--Type 1
| 3L***79 | Fuel Priming Pump Group | 1 |
3l6579 Fuel Priming Pump Group--Type 3
| 3L***79 | Fuel Priming Pump Group | 1 |
3l6579 Fuel Priming Pump Group--Type 2
| 3L***79 | Fuel Priming Pump Group | 1 |
3l4326 Generator--12 Volt, 35 Ampere
| 3L***26 | Generator | 1 |
4l2113 Generator--24 Volt, 18 Ampere
| 4L***13 | Generator | 1 |
3l5998 Generator--12 Volt, 30 Ampere
| 3L***98 | Generator | 1 |
4l2110 Generator Arrangement--12 Volt, 30 Ampere
| 4L***99 | Auxiliary Drive Group | 1 |
| 4L***03 | Generator Group | 1 |
| 4L***10 | Generator Arrangement | 1 |
4l2111 Generator Arrangement--24 Volt, 18 Ampere
| 4L***99 | Auxiliary Drive Group | 1 |
| 4L***70 | Generator Group | 1 |
| 4L***11 | Generator Arrangement | 1 |
5l5751 Generator Assembly--32 Volt, 18 Ampere
| 5L***51 | Generator Assembly | 1 |
4l3264 Generator--32 Volt, 18 Ampere
| 4L***64 | Generator Assembly | 1 |
5l5750 Generator Assembly--12 Volt, 35 Ampere
| 5L***50 | Generator Assembly | 1 |
5l6833 Generator Group--24 Volt, 18 Ampere--Type 2
| 5L***33 | Generator Group | 1 |
5l6832 Generator Group--12 Volt, 35 Ampere
| 5L***32 | Generator Group | 1 |
5l6832 Generator Group--12 Volt, 35 Ampere--Type 2
| 5L***32 | Generator Group | 1 |
4l2070 Generator Group--24-Volt, 18 Ampere
| 4L***70 | Generator Group | 1 |
5l6833 Generator Group--24 Volt, 18 Ampere--Type 1
| 5L***33 | Generator Group | 1 |
4l1903 Generator Group--12 Volt, 30 Ampere
| 4L***03 | Generator Group | 1 |
5l3141 Generator Group--12 Volt, 35 Ampere
| 5L***41 | Generator Group | 1 |
5l6222 Generator Group--32 Volt, 18 Ampere--Type 1
| 5L***22 | Generator Group | 1 |
5l6221 Generator Group--12 Volt, 35 Ampere
| 5L***21 | Generator Group | 1 |
5l3304 Generator Group--32 Volt, 60 Ampere--Type 2
| 5L***04 | Generator Group | 1 |
5l6226 Generator Group--32 Volt, 60 Ampere
| 5L***26 | Generator Group | 1 |
5l3304 Generator Group--32 Volt, 60 Ampere--Type 1
| 5L***04 | Generator Group | 1 |
5l6222 Generator Group--32 Volt, 18 Ampere--Type 2
| 5L***22 | Generator Group | 1 |
5l3132 Generator Group--32 Volt, 18 Ampere
| 5L***32 | Generator Group | 1 |
5l5689 Glow Plug Group--12 Volt--Type 1
| 5L***89 | Glow Plug Group | 1 |
6l6771 Glow Plug Group--24 Volt
| 6L***71 | Glow Plug Group | 1 |
4l3674 Glow Plug Group--24 Volt--Type 1
| 4L***74 | Glow Plug Group | 1 |
5l5690 Glow Plug Group--32 Volt--Type 1
| 5L***90 | Glow Plug Group | 1 |
5l5690 Glow Plug Group--32 Volt--Type 2
| 5L***90 | Glow Plug Group | 1 |
4l3674 Glow Plug Group--24 Volt--Type 2
| 4L***74 | Glow Plug Group | 1 |
6l6772 Glow Plug Group--32 Volt
| 6L***72 | Glow Plug Group | 1 |
4l3674 Glow Plug Group--24 Volt--Type 4
| 4L***74 | Glow Plug Group | 1 |
4l3674 Glow Plug Group--24 Volt--Type 3
| 4L***74 | Glow Plug Group | 1 |
6l6770 Glow Plug Group--12 Volt
| 6L***70 | Glow Plug Group | 1 |
5l5689 Glow Plug Group--12 Volt--Type 2
| 5L***89 | Glow Plug Group | 1 |
7f6899 Governor Control Group--Pilot House Mounted
| 7F***99 | Governor Control Group | 1 |
3l6299 Governor Control Group--Positive Locking--R.H.
| 3L***99 | Governor Control Group | 1 |
3l6307 Governor Control Group--Remote--R.H.
| 3L***07 | Governor Control Group | 1 |
4l6805 Governor Control Group--Single Cable--R.H.
| 4L***05 | Governor Control Group | 1 |
5l2518 Governor Control Group
| 5L***18 | Governor Control Group | 1 |
4l6811 Governor Control Lever Group
| 4L***11 | Governor Control Lever Group; Governor Control Lever Group Shown Below | 1 |
4l554 Governor Conversion Group
| 4L***54 | Governor Conversion Group | 1 |
5l3032 Governor Force Compensator Group
| 5L***32 | Governor Force Compensator Group | 1 |
4l7604 Control Handle Group
| 4L***04 | Handle Group-Control; Governor Control Handle Group | 1 |
Hardware--Instrument Panel
6l1992 Heat Exchanger Assembly
| 6L***92 | Heat Exchanger Assembly | 1 |
5l3332 Heat Exchanger Assembly--Type 1
| 5L***32 | Heat Exchanger Assembly | 1 |
5l3333 Heat Exchanger Assembly--Type 2
| 5L***33 | Heat Exchanger Assembly | 1 |
5l7983 Heat Exchanger Assembly
| 5L***83 | Heat Exchanger Assembly | 1 |
2l4782 Heat Exchanger Assembly
| 2L***82 | Heat Exchanger Assembly | 1 |
5l3333 Heat Exchanger Assembly--Type 1
| 5L***33 | Heat Exchanger Assembly | 1 |
5l7864 Heat Exchanger Assembly
| 5L***64 | Heat Exchanger Assembly | 1 |
5l7982 Heat Exchanger Assembly
| 5L***82 | Heat Exchanger Assembly | 1 |
5l3332 Heat Exchanger Assembly--Type 2
| 5L***32 | Heat Exchanger Assembly | 1 |
Heat Exchanger Chart
4l2894 Heat Exchanger Connections Group
| 4L***94 | Heat Exchanger Connections Group | 1 |
5l6302 Heat Exchanger, Raw Water Pump And Lines Group--Part 2 Of 2
| 5L***02 | Heat Exchanger, Raw Water Pump And Lines Group | 1 |
5l6302 Heat Exchanger, Raw Water Pump And Lines Group--Part 1 Of 2
| 5L***02 | Heat Exchanger, Raw Water Pump And Lines Group | 1 |
5l8660 Exhaust Fitting Group--4 Inch--Horizontal
| 5L***60 | Horizontal Exhaust Fitting Group | 1 |
4l2150 Instrument Panel Group--Pilot House Mounted
| 4L***50 | Instrument Panel Group | 1 |
4l4612 Instrument Panel Group
| 4L***12 | Instrumental Panel Group | 1 |
5l8251 Jacket Water Aftercooler And Connections Group--Keel Cooling
| 5L***51 | Jacket Water Aftercooler And Connections Group | 1 |
5l1296 Jacket Water Cooled Aftercooler Group--Type 2
| 5L***96 | Jacket Water Cooled Aftercooler Group | 1 |
5l1296 Jacket Water Cooled Aftercooler Group--Type 1
| 5L***96 | Jacket Water Cooled Aftercooler Group | 1 |
1p1122 Kit--Thrust Bearing Conversion
| 1P***22 | Kit | 1 |
| 2S***06 | Bearing --Thrust | 1 |
| 2S***08 | Deflector-- Oil | 1 |
5l4493 Motor And Wiring Group--32 Volt
| 5L***93 | Motor And Wiring Group | 1 |
5l5897 Motor And Wiring Group--12 Volt
| 5L***97 | Motor And Wiring Group | 1 |
5l5868 Motor And Wiring Group--12 Volt
| 5L***68 | Motor And Wiring Group | 1 |
3l9119 Motor And Wiring Group--24 Volt
| 3L***19 | Motor And Wiring Group | 1 |
8l8207 Electric Starting Motor Assembly--32 Volt--Part 1 Of 2
| 8L***07 | Motor As-Electric Starting | 1 |
8l8207 Electric Starting Motor Assembly--32 Volt--Part 2 Of 2
| 8L***07 | Motor As-Electric Starting | 1 |
5l2537 Motor Assembly--24 Volt--Part 1 Of 2--Type 1
| 5L***37 | Motor Assembly | 1 |
5l2537 Motor Assembly--24 Volt--Part 2 Of 2--Type 2
| 5L***37 | Motor Assembly | 1 |
5l2537 Motor Assembly--24 Volt--Part 1 Of 2--Type 2
| 5L***37 | Motor Assembly | 1 |
5l2537 Motor Assembly--24 Volt--Part 2 Of 2--Type 1
| 5L***37 | Motor Assembly | 1 |
4l1902 Generator Mounting And Drive Group
| 4L***02 | Mounting And Drive Group | 1 |
4l2068 Generator Mounting And Drive Group
| 4L***68 | Mounting And Drive Group | 1 |
5l8293 Oil Cooler Assembly
| 5L***93 | Oil Cooler Assembly | 1 |
4l1872 Oil Filler And Oil Level Gauge Group--R.H.
| 4L***72 | Oil Filler And Oil Level Gauge Group | 1 |
4l5801 Exhaust Pipe Group--6 Inch
| 4L***01 | Pipe Group-Exhaust | 1 |
5l8632 Exhaust Pipe Group--5 Inch
| 5L***32 | Pipe Group-Exhaust | 1 |
5l8649 Exhaust Pipe Group--4 Inch
| 5L***49 | Pipe Group-Exhaust | 1 |
3l9705 Primary Fuel Filter Group--Type 1
| 3L***05 | Primary Fuel Filter Group | 1 |
3l9705 Primary Fuel Filter Group--Type 2
| 3L***05 | Primary Fuel Filter Group | 1 |
8f2184 Centrifugal Pump
6l5861 Pump Drive Group--Bilge
| 6L***61 | Pump Drive Group | 1 |
5l1479 Rack Limiter Group
| 5L***79 | Rack Limiter Group | 1 |
5l1125 Raw Water Cooled Aftercooler Group--Type 1
| 5L***25 | Raw Water Cooled Aftercooler Group | 1 |
5l1125 Raw Water Cooled Aftercooler Group--Type 2
| 5L***25 | Raw Water Cooled Aftercooler Group | 1 |
4l1919 Raw Water Pump Assembly
| 4L***19 | Raw Water Pump Assembly | 1 |
4l9070 Raw Water Pump Assembly
| 4L***70 | Raw Water Pump Assembly | 1 |
5l6043 Water Pump Group
| 5L***43 | Raw Water Pump Group | 1 |
5l2390 Water Pump Group--Type 2
| 5L***90 | Raw Water Pump Group | 1 |
5l6743 Raw Water Pump Group--Field Installation
| 5L***43 | Raw Water Pump Group | 1 |
5l2390 Water Pump Group--Type 1
| 5L***90 | Raw Water Pump Group | 1 |
4l2887 Raw Water Pump Group--Rubber Impeller
| 4L***87 | Raw Water Pump Group | 1 |
3l6000 Regulator--12 Volt, 30 Ampere
| 3L***00 | Regulator | 1 |
3l4312 Regulator--24 Volt, 18 Ampere
| 3L***12 | Regulator | 1 |
3l4336 Regulator--12 Volt, 35 Ampere
| 3L***36 | Regulator | 1 |
6l5657 Regulator Assembly--24 Volt, 60 Ampere
| 6L***57 | Regulator Assembly | 1 |
5l7690 Regulator Assembly--32 Volt, 18 Ampere
| 5L***90 | Regulator Assembly | 1 |
5l7572 Full Flow By-Pass Regulator Group
| 5L***72 | Regulator Group | 1 |
4l9115 Alarm Contactor Group--1/8" Pipe Thread
| 4L***15 | Safety Alarm Contactor Group | 1 |
5l9879 Oil Pressure And Water Temperature Safety Contactor Group
| 5L***79 | Safety Contactor Group | 1 |
5l7428 Single Panel Group--24 Or 32 Volt
| 5L***28 | Single Panel Group | 1 |
5l9892 Single Panel Group--12 Volt
| 5L***92 | Single Panel Group | 1 |
5l7429 Single Panel Group--12 Volt
| 5L***29 | Single Panel Group | 1 |
8f4185 Foot Valve And Strainer Assembly
| 8F***85 | Strainer As; Foot Valve And Strainer Assembly | 1 |
4m1812 Solenoid Switch Assembly
| 4M***12 | Switch As-Solenoid | 1 |
5l8735 Solenoid Switch Assembly
| 5L***35 | Switch As-Solenoid | 1 |
3l7112 Tachometer Drive Group
| 3L***12 | Tachometer Drive Group | 1 |
4l8393 Tachometer Drive Group
| 4L***93 | Tachometer Drive Group | 1 |
4l2353 Electric Tachometer Group
| 4L***53 | Tachometer Group-Electric; Electric Tachometer Group | 1 |
1l5010 Air Receiver Group--10.5 Cubic Foot Capacity
| 1L***10 | Tank Group-Air | 1 |
9m3181 Turbocharger Assembly--Type 2
| 9M***81 | Turbocharger Assembly | 1 |
8m6839 Turbocharger Assembly--Type 3
| 8M***39 | Turbocharger Assembly | 1 |
8m6831 Turbocharger Assembly--Type 3
| 8M***31 | Turbocharger Assembly | 1 |
9m2625 Turbocharger Assembly--Type 1
| 9M***25 | Turbocharger Assembly | 1 |
9m2625 Turbocharger Assembly--Type 2
8m6838 Turbocharger Assembly--Type 1
| 8M***38 | Turbocharger Assembly | 1 |
3s4449 Turbocharger Assembly--Replaces 9m5155
| 3S***49 | Turbocharger Assembly | 1 |
4m9166 Turbocharger Assembly
| 4M***66 | Turbocharger Assembly | 1 |
7m4242 Turbocharger Assembly
| 7M***42 | Turbocharger Assembly | 1 |
9m5155 Turbocharger Assembly--Replaces 9m2625--Type 1
| 9M***55 | Turbocharger Assembly | 1 |
9m1764 Turbocharger Assembly--Type 1
| 9M***64 | Turbocharger Assembly | 1 |
1s519 Turbocharger Assembly--Type 2
| 1S***19 | Turbocharger Assembly | 1 |
9m5155 Turbocharger Assembly--Type 2
| 9M***55 | Turbocharger Assembly | 1 |
9m1764 Turbocharger Assembly--Type 2
| 9M***64 | Turbocharger Assembly | 1 |
9m3184 Turbocharger Assembly--Type 2
| 9M***84 | Turbocharger Assembly | 1 |
8m6831 Turbocharger Assembly--Type 2
| 8M***31 | Turbocharger Assembly | 1 |
8m6838 Turbocharger Assembly--Type 2
| 8M***38 | Turbocharger Assembly | 1 |
8m5507 Turbocharger Assembly--Type 1
| 8M***07 | Turbocharger Assembly | 1 |
8m6838 Turbocharger Assembly--Type 3
| 8M***38 | Turbocharger Assembly | 1 |
8m6832 Turbocharger Assembly--Type 3
| 8M***32 | Turbocharger Assembly | 1 |
3s4450 Or 8s3964 Turbocharger Assembly
| 8S***64 | Turbocharger Assembly | 1 |
5m8240 Turbocharger Assembly
| 5M***40 | Turbocharger Assembly | 1 |
8m9072 Turbocharger Assembly--Type 2
| 8M***72 | Turbocharger Assembly | 1 |
8m6832 Turbocharger Assembly--Type 1
| 8M***32 | Turbocharger Assembly | 1 |
8m6839 Turbocharger Assembly--Type 1
| 8M***39 | Turbocharger Assembly | 1 |
1s519 Turbocharger Assembly--Type 1
| 1S***19 | Turbocharger Assembly | 1 |
8m9072 Turbocharger Assembly
| 8M***72 | Turbocharger Assembly | 1 |
3s4448 Turbocharger Assembly--Replaces 9m3182
| 3S***48 | Turbocharger Assembly | 1 |
8m7925 Turbocharger Assembly--Type 2
| 8M***25 | Turbocharger Assembly | 1 |
9m3184 Turbocharger Assembly--Replaces 8m7925--Type 1
| 9M***84 | Turbocharger Assembly | 1 |
3s4441 Turbocharger Assembly
| 3S***41 | Turbocharger Assembly | 1 |
8m6832 Turbocharger Assembly--Type 2
| 8M***32 | Turbocharger Assembly | 1 |
5m7586 Turbocharger Assembly
| 5M***86 | Turbocharger Assembly | 1 |
9m3181 Turbocharger Assembly--Replaces 8m5507--Type 1
| 9M***81 | Turbocharger Assembly | 1 |
8m6839 Turbocharger Assembly--Type 2
| 8M***39 | Turbocharger Assembly | 1 |
9m3182 Turbocharger Assembly
| 9M***82 | Turbocharger Assembly | 1 |
8m5507 Turbocharger Assembly--Type 2
| 8M***07 | Turbocharger Assembly | 1 |
9m3182 Turbocharger Assembly--Type 2
| 9M***82 | Turbocharger Assembly | 1 |
8s3963 Turbocharger Assembly--Replaces 3s4449
| 8S***63 | Turbocharger Assembly | 1 |
5m8239 Turbocharger Assembly
| 5M***39 | Turbocharger Assembly | 1 |
9m5156 Turbocharger Assembly--Type 2
| 9M***56 | Turbocharger Assembly | 1 |
8m7925 Turbocharger Assembly--Type 1
| 8M***25 | Turbocharger Assembly | 1 |
8m6831 Turbocharger Assembly--Type 1
| 8M***31 | Turbocharger Assembly | 1 |
9m5156 Turbocharger Assembly--Type 1
| 9M***56 | Turbocharger Assembly | 1 |
3s4421 Turbocharger Assembly--Type 1
| 3S***21 | Turbocharger Assembly | 1 |
9m3183 Turbocharger Assembly
| 9M***83 | Turbocharger Assembly | 1 |
3s4420 Turbocharger Assembly
| 3S***20 | Turbocharger Group | 1 |
1l5011 Regulating And Pressure Reducing Valve
| 1L***11 | Valve Group-Starting Air | 1 |
5l8604 Exhaust Fitting Group--6 Inch--Vertical
| 5L***04 | Vertical Exhaust Fitting Group | 1 |
5l8602 Exhaust Fitting Group--4 Inch--Vertical
| 5L***02 | Vertical Exhaust Fitting Group | 1 |
4l6819 Water Cooled Exhaust Elbow Group--6 Inch
| 4L***19 | Water Cooled Elbow Group | 1 |
5l6493 Water Cooled Exhaust Elbow Group--6 Inch
| 5L***93 | Water Cooled Exhaust Elbow Group | 1 |
5l6924 Water Cooled Exhaust Elbow Group--5 Inch
| 5L***24 | Water Cooled Exhaust Elbow Group | 1 |
5l7804 Water Cooled Exhaust Pipe Group--5 Inch
| 5L***04 | Water Cooled Exhaust Pipe Group | 1 |
5l4572 Water Pump Assembly
| 5L***72 | Water Pump Assembly | 1 |
5l2391 Water Pump Assembly
| 5L***91 | Water Pump Assembly | 1 |
6l5857 Water Pump Group--Bilge
| 6L***57 | Water Pump Group | 1 |
3l9921 Whistle Valve Assembly
| 3L***21 | Whistle Valve Assembly | 1 |
Diesel Engine
Accessory Drive
Aftercooler (5l7471 N/S)
| 5L***71 | Aftercooler | 1 |
Air Cleaner (5l7628 N/S)--Dry Type
| 5L***28 | Air Cleaner | 1 |
Air Cleaner--Dry Type
Camshaft
Camshaft (9h9091 N/S)
| 9H***91 | Camshaft | 1 |
Connecting Rod And Piston (5m1785 N/S)--6 Required
| 5M***85 | Connecting Rod And Piston | 1 |
Crankshaft (4l2969 N/S)
| 4L***69 | Crankshaft | 1 |
Crankshaft Bearing Replacement Groups
Cylinder Block And Covers--Side View--Part 1 Of 2
Cylinder Block And Covers--End View--Part 2 Of 2
4m9001 Cylinder Block Assembly
| 4M***01 | Cylinder Block Assembly | 1 |
7m4403 Cylinder Block Assembly--Type 2
| 7M***03 | Cylinder Block Assembly | 1 |
7m4403 Cylinder Block Assembly--Type 1
| 7M***03 | Cylinder Block Assembly | 1 |
Cylinder Head And Valve Mechanism--Side View--Part 1 Of 2
Cylinder Head And Valve Mechanism--End View--Part 2 Of 2
Cylinder Head And Valve Mechanism--End View Part 2 Of 2
Exhaust Pipe
Flywheel
5l2749 Flywheel Group
| 5L***49 | Flywheel Group | 1 |
Fuel Filter
Fuel Injection Valves And Lines
Fuel Pump Housing And Governor
2m4050 Fuel Pump Housing Group
| 2M***50 | Fuel Pump Housing Group | 1 |
8h9794 Fuel Transfer Pump Assembly
| 8H***94 | Fuel Transfer Pump Assembly | 1 |
4l6480 Governor Group
| 4L***80 | Governor Group | 1 |
6l3446 Heat Exchanger Assembly
| 6L***46 | Heat Exchanger Assembly | 1 |
5l7865 Heat Exchanger Assembly
| 5L***65 | Heat Exchanger Assembly | 1 |
6l1990 Heat Exchanger Assembly
| 6L***90 | Heat Exchanger Assembly | 1 |
Manifold
5l9489 Manifold Group--Part 2 Of 2
| 5L***89 | Manifold Group | 1 |
5l8684 Manifold Group
| 5L***84 | Manifold Group | 1 |
5l9489 Manifold Group--Part 1 Of 2
| 5L***89 | Manifold Group | 1 |
Manifolds
Marine Gear Oil Cooler
Oil Cooler
Oil Filler, Breather And Fumes Disposal
9m530 Oil Filter Assembly
| 9M***30 | Oil Filter Assembly | 1 |
4m8207 Oil Filter Assembly
| 4M***07 | Oil Filter Assembly | 1 |
7m7672 Oil Filter Assembly
| 7M***72 | Oil Filter Assembly | 1 |
Oil Pump
8m4616 Oil Pump Assembly
| 8M***16 | Oil Pump Assembly | 1 |
2m832 Oil Pump Assembly
| 2M***32 | Oil Pump Assembly | 1 |
7m4201 Oil Pump Assembly--Type 1
| 7M***01 | Oil Pump Assembly | 1 |
9l1282 Oil Pump Assembly
| 9L***82 | Oil Pump Assembly | 1 |
9l455 Oil Pump Assembly
| 9L***55 | Oil Pump Assembly | 1 |
7m4201 Oil Pump Assembly--Type 2
| 7M***01 | Oil Pump Assembly | 1 |
Raw Water Pump, Heat Exchanger And Connections--Part 2 Of 2
Raw Water Pump, Heat Exchanger And Connections--Part 1 Of 2
Service Meter (3l5665 N/S)
| 3L***65 | Service Meter | 1 |
Surge Tank And Water Lines
Turbocharger And Turbocharger Mounting
8m7926 Turbocharger Assembly
| 8M***26 | Turbocharger Assembly | 1 |
4m9165 Turbocharger Assembly
| 4M***65 | Turbocharger Assembly | 1 |
9m3183 Turbocharger Assembly
| 9M***83 | Turbocharger Assembly | 1 |
Turbocharger Mounting
Turbocharger Mounting And Oil Lines
Turbocharger Oil Lines And Valve
5l5770 Turbocharger Oil Lines And Valve Group--Field Installation
| 5L***70 | Turbocharger Oil Lines And Valve Group | 1 |
Turbocharger, Turbocharger Mounting And Sequence Valve
Water Cooled Exhaust Manifold
6l6390 Water Cooled Exhaust Manifold Group--Field Installation
| 6L***90 | Water Cooled Exhaust Manifold Group | 1 |
2s1678 Water Pump Assembly
| 2S***78 | Water Pump Assembly | 1 |
5l6042 Water Pump Assembly
| 5L***42 | Water Pump Assembly | 1 |
3l8829 Water Pump Group
| 3L***29 | Water Pump Group | 1 |
5l7879 Water Pump Group
| 5L***79 | Water Pump Group | 1 |
Marine Gears
8f9866 Grease Gun--Type 2
| 8F***66 | Grease Gun As | 1 |
8f9866 Grease Gun--Type 1
| 8F***66 | Grease Gun As | 1 |
Marine Control
| 5L***91 | Twin "S" Control --Pilot House; Twin "S" Control-- Pilot House | 1 |
| 5L***16 | Cable-16 Foot | 0 |
| 5L***17 | Cable-14 Foot | 0 |
4l8669 Marine Gear Arrangement--Raw Water Cooling--2.04 : 1 Ratio
| 4L***94 | Heat Exchanger Connections Group | 1 |
| 4L***69 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
4l9255 Marine Gear Arrangement--Raw Water Cooling--2.95 : 1 Ratio
| 4L***94 | Heat Exchanger Connections Group | 1 |
| 4L***74 | Mounting Group | 1 |
| 4L***75 | Oil Cooler Group | 1 |
4l8670 Marine Gear Arrangement--Raw Water Cooling--3.39 : 1 Ratio
| 4L***94 | Heat Exchanger Connections Group | 1 |
| 4L***70 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
4l8671 Marine Gear Arrangement--Keel Cooling--1.47 : 1 Ratio
| 4L***71 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
| 4L***76 | Oil Cooler Group | 1 |
4l9254 Marine Gear Arrangement--Keel Cooling--2.95 : 1 Ratio
| 4L***74 | Mounting Group | 1 |
| 4L***76 | Oil Cooler Group | 1 |
| 4L***15 | Water Lines Group | 1 |
5l9201 Marine Gear Arrangement - 4.4 : 1 Ratio
| 5L***01 | Marine Gear Arrangement | 1 |
| 5L***02 | Marine Gear Assembly | 1 |
| 5L***38 | Mounting Group | 1 |
4l8668 Marine Gear Arrangement--Raw Water Cooling--1.47 : 1 Ratio
| 4L***94 | Heat Exchanger Connections Group | 1 |
| 4L***68 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
5l6816 Marine Gear Arrangement - 3.39 : 1 Ratio
| 5L***16 | Marine Gear Arrangement | 1 |
| 5L***79 | Marine Gear Assembly | 1 |
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
4l8672 Marine Gear Arrangement--Keel Cooling--2.04 : 1 Ratio
| 4L***72 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
| 4L***76 | Oil Cooler Group | 1 |
5l6813 Marine Gear Arrangement - 1.47 : 1 Ratio
| 5L***13 | Marine Gear Arrangement | 1 |
| 5L***76 | Marine Gear Assembly | 1 |
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
5l6815 Marine Gear Arrangement - 2.95 : 1 Ratio
| 5L***15 | Marine Gear Arrangement | 1 |
| 5L***78 | Marine Gear Assembly | 1 |
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
5l6814 Marine Gear Arrangement - 2.04 : 1 Ratio
| 5L***14 | Marine Gear Arrangement | 1 |
| 5L***77 | Marine Gear Assembly | 1 |
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
4l8673 Marine Gear Arrangement--Keel Cooling--3.39 : 1 Ratio
| 4L***73 | Marine Gear Arrangement | 1 |
| 4L***74 | Mounting Group | 1 |
| 4L***76 | Oil Cooler Group | 1 |
5l1459 Marine Gear Assembly--Part 1 Of 3--Type 2
| 5L***59 | Marine Gear Assembly | 1 |
6l2684 Marine Gear Assembly--Part 1 Of 3
| 6L***84 | Marine Gear Assembly | 1 |
5l8476 Marine Gear Assembly--Part 3 Of 3
| 5L***76 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 1 Of 3--Type 1
| 5L***61 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 3 Of 3--Type 3
| 5L***60 | Marine Gear Assembly | 1 |
5l8479 Marine Gear Assembly--Part 3 Of 3
| 5L***79 | Marine Gear Assembly | 1 |
5l9202 Marine Gear Assembly--Part 2 Of 3
| 5L***02 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 3 Of 3--Type 2
| 5L***61 | Marine Gear Assembly | 1 |
6l2913 Marine Gear Assembly--Part 2 Of 3
| 6L***13 | Marine Gear Assembly | 1 |
6l2913 Marine Gear Assembly--Part 3 Of 3
| 6L***13 | Marine Gear Assembly | 1 |
6l2856 Marine Gear Assembly--Part 1 Of 3
| 6L***56 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 2 Of 3--Type 2
| 5L***61 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 2 Of 3--Type 3
| 5L***61 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 2 Of 3--Type 3
| 5L***62 | Marine Gear Assembly | 1 |
6l2173 Marine Gear Assembly--Part 1 Of 3--Replaces 5l8476
| 6L***73 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 3 Of 3--Type 2
| 5L***60 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 2 Of 3--Type 1
| 5L***62 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 3 Of 3--Type 2
| 5L***62 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 2 Of 3--Type 2
| 5L***60 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 2 Of 3--Type 1
| 5L***61 | Marine Gear Assembly | 1 |
6l2684 Marine Gear Assembly--Part 3 Of 3
| 6L***84 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 3 Of 3--Type 1
| 5L***62 | Marine Gear Assembly | 1 |
5l8479 Marine Gear Assembly--Part 1 Of 3
| 5L***79 | Marine Gear Assembly | 1 |
6l2856 Marine Gear Assembly--Part 3 Of 3
| 6L***56 | Marine Gear Assembly | 1 |
6l2173 Marine Gear Assembly--Part 3 Of 3--Replaces 5l8476
| 6L***73 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 3 Of 3--Type 1
| 5L***61 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 2 Of 3--Type 3
| 5L***60 | Marine Gear Assembly | 1 |
5l9202 Marine Gear Assembly--Part 1 Of 3
| 5L***02 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 1 Of 3--Type 2
| 5L***62 | Marine Gear Assembly | 1 |
6l2684 Marine Gear Assembly--Part 2 Of 3
| 6L***84 | Marine Gear Assembly | 1 |
5l8479 Marine Gear Assembly--Part 2 Of 3
| 5L***79 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 3 Of 3--Type 3
| 5L***62 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 3 Of 3--Type 2
| 5L***59 | Marine Gear Assembly | 1 |
6l2913 Marine Gear Assembly--Part 1 Of 3
| 6L***13 | Marine Gear Assembly | 1 |
5l9202 Marine Gear Assembly--Part 3 Of 3
| 5L***02 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 1 Of 3--Type 3
| 5L***62 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 3 Of 3--Type 1
| 5L***60 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 1 Of 3--Type 3
| 5L***60 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 1 Of 3--Type 3
| 5L***61 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 2 Of 3--Type 2
| 5L***59 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 1 Of 3--Type 3
| 5L***59 | Marine Gear Assembly | 1 |
5l8478 Marine Gear Assembly--Part 1 Of 3
| 5L***78 | Marine Gear Assembly | 1 |
5l8476 Marine Gear Assembly--Part 2 Of 3
| 5L***76 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 3 Of 3--Type 3
| 5L***59 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 1 Of 3--Type 2
| 5L***60 | Marine Gear Assembly | 1 |
5l8477 Marine Gear Assembly--Part 3 Of 3
| 5L***77 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 2 Of 3--Type 3
| 5L***59 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 2 Of 3--Type 1
| 5L***60 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 2 Of 3--Type 2
| 5L***62 | Marine Gear Assembly | 1 |
6l2856 Marine Gear Assembly--Part 2 Of 3
| 6L***56 | Marine Gear Assembly | 1 |
5l1461 Marine Gear Assembly--Part 1 Of 3--Type 2
| 5L***61 | Marine Gear Assembly | 1 |
5l8476 Marine Gear Assembly--Part 1 Of 3
| 5L***76 | Marine Gear Assembly | 1 |
5l8478 Marine Gear Assembly--Part 2 Of 3
| 5L***78 | Marine Gear Assembly | 1 |
5l8477 Marine Gear Assembly--Part 2 Of 3
| 5L***77 | Marine Gear Assembly | 1 |
6l2173 Marine Gear Assembly--Part 2 Of 3--Replaces 5l8476
| 6L***73 | Marine Gear Assembly | 1 |
5l8477 Marine Gear Assembly--Part 1 Of 3
| 5L***77 | Marine Gear Assembly | 1 |
5l8478 Marine Gear Assembly--Part 3 Of 3
| 5L***78 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 1 Of 3--Type 1
| 5L***59 | Marine Gear Assembly | 1 |
5l1460 Marine Gear Assembly--Part 1 Of 3--Type 1
| 5L***60 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 3 Of 3--Type 1
| 5L***59 | Marine Gear Assembly | 1 |
5l1462 Marine Gear Assembly--Part 1 Of 3--Type 1
| 5L***62 | Marine Gear Assembly | 1 |
5l1459 Marine Gear Assembly--Part 2 Of 3--Type 1
| 5L***59 | Marine Gear Assembly | 1 |
6l3624 Marine Gear Group--Housing
| 6L***24 | Marine Gear Group | 1 |
6l3614 Marine Gear Group--Service
| 6L***14 | Marine Gear Group | 1 |
5l1461 Marine Gear Assembly--Part 3 Of 3 Type 3
| 6L***24 | Marine Gear Group | 1 |
5l8509 Mounting Group--Type 1
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
5l9238 Mounting Group--Type 1--Factory Installation
| 5L***38 | Mounting Group | 1 |
5l9238 Mounting Group--Part 2 Of 2--Type 4--Factory Installation
| 5L***38 | Mounting Group | 1 |
5l9238 Mounting Group--Type 2--Factory Installation
| 5L***38 | Mounting Group | 1 |
5l8509 Mounting Group--Type 2
| 5L***09 | Mounting Group; Marine Gear Mounting Group | 1 |
5l9238 Mounting Group--Part 1 Of 2--Type 4--Factory Installation
| 5L***38 | Mounting Group | 1 |
4l8674 Mounting Group
| 4L***74 | Mounting Group | 1 |
5l9238 Mounting Group--Type 3--Factory Installation
| 5L***38 | Mounting Group | 1 |
Name Plates And Transfers
| 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 |
| 5L***85 | Plate; Warning And Information On Flywheel Housing | 2 |
4l8676 Oil Cooler Group
| 4L***76 | Oil Cooler Group | 1 |
4l8675 Oil Cooler Group
| 4L***75 | Oil Cooler Group | 1 |
4l7662 Selector Valve Assembly
| 4L***62 | Selector Valve Assembly | 1 |
4l3222 Selector Valve Assembly
| 4L***22 | Selector Valve Assembly | 1 |
4l1560 Tool Group
| 4L***60 | Tool Group | 1 |
4l8715 Water Lines Group
| 4L***15 | Water Lines Group | 1 |
D333A serial number reference
On the D333A the engine serial/arrangement number is stamped on a plate on the right side of the block near the injection pump, or on the flywheel housing on marine builds. Where the D333A was the original engine in a 1960s machine (Cat 977H track loader, 966/966B wheel loader, D6C crawler tractor), the same prefix also shows on the machine's frame-mounted serial plate, since engine and unit numbering were shared on these vintage models. The prefix is the first 3 characters ahead of the numeric run, for example 59B12345 or 53A01907. A 6-bolt, low-profile rocker cover and belt-driven water pump identify a D333A block; a gear-driven water pump points to the later D333B/D333C.
| Prefix | Identifies | Notes |
|---|---|---|
| 59B | D333A marine engine, standard marine production block | Six-cylinder, 4-1/2 in (114 mm) bore, belt-driven water pump, low-profile 6-bolt rocker cover. Covers an early marine serial range for the D333A. |
| 88B | D333A marine engine, second marine production serial block | Same D333A architecture as 59B (4-1/2 in bore, belt-driven water pump). Numbering picks up as an open-ended range after 59B, consistent with a follow-on marine production block rather than a different engine. |
| 53A | D333A engine as originally fitted in the Cat 977H track loader (Traxcavator) | Turbocharged 6-cylinder, 4-1/2 in bore, roughly 150 hp, belt-driven water pump, low 6-bolt rocker cover. This is the machine/engine serial prefix shared across 977H production, roughly 1960-1966. |
| 75A | D333A turbocharged engine (D333aT) as fitted in early Cat 966 / 966B wheel loaders | 6-cylinder, 4-1/2 in bore, roughly 150 hp, two-speed powershift wheel loader chassis. Production roughly 1963-1968. |
| 74A | D333A turbocharged block as fitted in the Cat D6C crawler tractor, direct-drive transmission | Engine and machine share the same serial number on this vintage tractor. 6-bolt rocker cover and belt-driven water pump confirm D333A (not the later gear-driven D333B/C). Confirm exact build-year span with dealer. |
| 82A | D333A turbocharged block as fitted in the Cat D6C crawler tractor, direct-drive transmission (UK-built) | UK production run of the direct-drive D6C, starting 1964. Same D333A turbo block identification as the 74A/75A/83A group (4-1/2 in bore, 6-bolt rocker cover, belt-driven water pump). |
| 83A | D333A turbocharged block as fitted in the Cat D6C crawler tractor, powershift transmission (UK-built) | UK production run of the powershift D6C, starting 1964. Same D333A turbo block identification as the 74A/75A/82A group (4-1/2 in bore, 6-bolt rocker cover, belt-driven water pump). |
Frequently asked questions
What engine powers the Caterpillar D333A?
The D333A is itself the engine - a naturally aspirated, mechanical inline-six diesel with a 114.3 mm x 139.7 mm (4.5 in x 5.5 in) bore and stroke, displacing roughly 8.6 liters (525 cu in). It was built for marine propulsion, generator-set, and industrial mechanical-drive duty, not as a component fitted inside a larger machine.
What is the operating weight of the D333A?
No full-machine operating weight is documented, since the D333A is a stationary/marine power unit rather than a mobile machine with a gross vehicle weight rating. The dry engine block itself weighs roughly 900-1,000 kg (2,000-2,200 lb) depending on accessory fitment; adding the marine gear, heat exchanger, and flywheel housing increases installed weight further.
What replaced the D333A?
Within the same family, the D333A/B generation gave way to the D333C around the late 1960s, which increased bore to 120.7 mm (4.75 in) and switched to a gear-driven jacket water pump. Caterpillar then consolidated the line into the 3304 and 3306 engines, which carried the mechanical inline-six architecture forward into later emissions-tiered and electronically governed production.
What D333A owners discuss
What do owners say about the D333A's injection pump and governor setup?
The D333A uses a mechanical inline pump per cylinder feeding a precombustion chamber, and the pump-governor assembly is calibrated as a matched set rather than a bolt-in generic unit. After long dormancy or a run of poor-quality fuel, owners report the governor linkage and pump gumming up with old-fuel varnish, causing rough idle or hunting until cleaned and recalibrated. Rebuilders recommend sending the whole pump-governor assembly to a specialist for recalibration rather than swapping individual internal parts.
How do D333A cylinder liners hold up, and can they still be replaced?
Consensus among vintage-Cat owners is that the wet liners are very hard-wearing and consistent with this engine's low-speed, low-stress reputation, so bore wear under normal duty is slow. The practical problem today is stock: new liners in this bore size are scarce, and some rebuilders fall back on hard-chrome plating or custom-machined sleeves when a factory replacement can't be found. Anyone budgeting a rebuild should plan on a specialty vintage-diesel supplier rather than a mainstream parts counter, and expect longer lead times.
What cooling-system problems come up most with this engine?
It depends on how the installation is plumbed. Fresh-water-cooled engines running a raw-water-to-heat-exchanger loop are prone to heat-exchanger fouling from salt and debris, so periodic flushing and raw-water pump impeller checks are standard advice. Keel-cooled setups see less scale buildup but are more sensitive to trapped air; one documented case had a D333A overheat after a transmission-cooler repair simply because the fresh-water side wasn't fully bled on refill. If overheating shows up after any cooling-system repair, have your dealer or a qualified diesel mechanic verify the bleed procedure and pump condition before loading the engine.
How does the marine reduction/reverse gear behave with the D333A?
These engines were commonly paired with separate marine reduction gears (reduction ratio varies by installation), and owners treat the gearbox as its own maintenance item independent of the engine. When checking a used setup, the usual practice is to run the engine in gear under load, then inspect the gear fluid for dark color, burnt smell, or metallic specks under bright light, which point to worn clutch packs or bearings. Hesitation on reverse engagement is more often traced to the gear's own linkage or oil condition than to the engine itself.
Is the D333A hard to start in cold weather?
Yes, this is a widely repeated characteristic of the precombustion-chamber design: owners describe a preheat cycle on the glow plugs followed by a rough first minute or two of running even on a healthy engine. A safety point raised consistently in diesel forums is that starting fluid should never be introduced while glow plugs are still hot, since ether hitting a hot element can cause a dangerous over-rev or backfire. Circulating coolant heaters and a lighter winter-grade oil are the preferred fix over relying on starting fluid. Because misuse of starting aids on a glow-plug engine is a safety issue, have your dealer or a qualified diesel mechanic verify glow-plug condition before using any starting aid.
Are parts and rebuild kits still realistically available for the D333A today?
Owners describe the D333A as mechanically simple and reliable, part of why examples are still running in settings that favor non-electronic engines, but the supply chain has thinned considerably. Overhaul and in-frame kits are sold serial-number-specific through a small number of legacy-Cat specialists rather than mainstream heavy-duty parts chains, and charging-system wear parts on earlier DC-generator-equipped units are also getting scarce, which pushes some owners toward alternator conversions. Budget more lead time for sourcing than a modern engine rebuild would need.
What should I check before buying a used D333A-powered boat or genset?
Beyond a full marine survey, inspect the engine bed and mounts for cracks or water staining, pull an oil sample to screen for coolant or fuel contamination, and run the engine under load long enough to sample the marine gear fluid for metal particles. Confirm which cooling configuration is fitted, heat exchanger or keel cooler, since upkeep differs between them, and verify rocker-cover and liner details match the claimed serial prefix rather than assuming parts commonality with later D333 variants. Given the age of the engine and the stakes of a marine installation, have a qualified marine surveyor or dealer verify engine and gearbox condition before purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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