Caterpillarengine - industrialgas engine
Caterpillar G333C
Maintenance schedule, common problems & OEM parts breakdown
The G333C is a Caterpillar spark-ignited natural-gas industrial engine, an inline-6, four-stroke design displacing roughly 10.5 L (638 cu in) on a 120.6 mm x 152.4 mm (4-3/4 in x 6 in) bore and stroke. It shares that cylinder block with the diesel D333C industrial engine of the same era and was built into the late 1960s, with confirmed production starting around serial prefix 68D (circa 1968). Caterpillar did not publish an operating weight or external dimensions for this bare industrial engine; it shipped as a standalone power unit or skid-mounted package, without a chassis, for stationary generator-set, pump, or compressor drive. Factory configurations included magneto or distributor-type ignition, an enclosed flywheel clutch or front/rear power-take-off output, and optional air-starting for sites without reliable electric start. The G333C is the direct predecessor of Caterpillar's later G3306 natural-gas engine.
Documentation for the G333C itself is thin: no standalone spec sheet or Operation & Maintenance Manual with refill capacities survives in searchable form, so most technical detail is triangulated from the shared-block D333C diesel and the later G3306 gas engine that inherited the same bore and stroke. What did carry forward is the core architecture: a naturally aspirated inline-6 gas block later re-rated and rebranded as the G3306, which is why parts and service knowledge for common wear items such as the water pump, valve train, and ignition system cross reference cleanly between the two. In today's used and parts market, the G333C matters mainly to owners of vintage gensets, pump stations, and compressor packages who need a rebuildable, well-understood industrial gas block; because it predates emissions rules and electronic controls entirely, it remains mechanically simple to keep running as long as magneto, governor, and valve-train wear items are sourced through the G3306-family parts network.
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 G333C specifications
Engine
| Identity | Spark-ignited natural gas industrial engine, inline-6, 4-stroke. Built on the same cylinder block architecture as the D333C diesel industrial engine of the same era (mid-to-late 1960s) and directly precedes the G3306 gas engine in the Caterpillar lineup. |
| Bore x Stroke | 120.6 mm x 152.4 mm (4-3/4 in x 6 in) |
| Displacement | Approximately 10.5 L (638 cu in), calculated from the bore and stroke shared with the related D333C block. Not separately published as a standalone gas-engine figure. |
| Cylinders | 6, inline |
| Aspiration | Naturally aspirated, typical for this engine generation. A turbocharged arrangement is not documented for this model specifically. |
| Rated power | Not published for this exact serial-prefix range in available factory literature. Confirm the gross power rating against the arrangement number on your unit nameplate or with the factory service manual for your serial prefix. |
| Emissions tier | Pre-dates emissions certification; no tier rating applies. |
Weights
| Operating/dry weight | Not documented in available published specification sources for this model. Check the OEM parts or service manual for your engine's serial prefix. |
| Shipping weight | Not documented in available published specification sources for this model. |
Dimensions
| Overall length/width/height | Not documented in available published specification sources for this model. As a bare industrial power unit, dimensions vary by mounting skid, radiator, and accessory package. |
| Configuration note | Sold as a standalone power unit (no chassis, track, or wheelbase dimensions apply). |
Performance
| Rated speed | Continuous industrial ratings for this engine generation are typically taken at 1800 rpm; confirm the governed speed against your specific arrangement, since generator-drive and mechanical-drive arrangements were rated differently. |
| Applicability | Stationary/mechanical-drive industrial engine — no travel speed, drawbar, lift, or gradeability figures apply. |
Service capacities (summary)
| Fuel | Natural gas (carbureted/gas-regulator fed from an external supply). No onboard fuel tank capacity applies to this engine type; LP gas conversion was offered on some engines of this family but is not confirmed specifically for this model. |
| Engine oil | Not documented for this exact model in available literature. Confirm capacity and service interval with the factory service manual for your serial prefix before refill. |
| Cooling system | Not documented for this exact model in available literature. Confirm capacity with the factory service manual for your serial prefix. |
| Hydraulic system | Not applicable — bare industrial engine, no onboard hydraulic system. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
G333C fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with oil filter) | 27–45 L (7.3–11.9 US gal); varies by configuration/series | Cat NGEO (Natural Gas Engine Oil), low-ash formulation, SAE 40 for normal ambient operation. Low sulfated-ash content and TBN retention are mandatory on this rich-burn gas engine to prevent valve and piston deposit buildup and to avoid detonation. In cold climates use a jacket-water heater to ease starting rather than a lighter grade, since low-ash gas-engine oils are typically supplied in a single SAE 40 viscosity. |
| Cooling system (engine jacket water only; excludes radiator/heat exchanger/expansion tank) | 16–20 L (4.2–5.3 US gal) engine-only; add radiator or heat-exchanger and expansion-tank volume for total system fill; varies by naturally-aspirated vs turbocharged-aftercooled build | Fully-formulated heavy-duty ethylene-glycol antifreeze/coolant with corrosion inhibitor (Cat DEAC-type formulation for this engine's era); Cat ELC (Extended Life Coolant) is the modern equivalent for units serviced today. Check and maintain supplemental coolant additive concentration on the recommended test interval; do not mix inhibitor chemistries. |
| Fuel system (natural/field gas supply) | Not applicable — gaseous fuel drawn from an external pipeline or field-gas source through a pressure regulator; no onboard liquid fuel tank | Pipeline natural gas or field/associated gas, roughly 83–172 kPa (12–25 psi) at the regulator inlet depending on build. Fuel gas quality (methane number) must suit the engine's compression ratio and ignition timing to avoid detonation on this rich-burn carbureted design. |
| Grease points — external accessory-drive/idler pulleys and optional PTO clutch (spec only) | No refill capacity specified; lubricate fittings on the scheduled interval | Cat Multipurpose Grease (Cat MPGM), NLGI 2 lithium-complex, for normal ambient use. Switch to Cat Extreme Application Grease (Cat EAG) or an equivalent synthetic grease for sustained ambient temperatures below about -20°C (-4°F). |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar G333C maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 8,000 h |
|
Servicing the G333C beyond the schedule
Predictive Maintenance & Fluid Analysis
Because the G333C predates any ECM, trend data comes from hand instruments. Sample crankcase oil and watch TBN and ash retention on the low-ash Cat NGEO fill; declining TBN signals valve and piston deposit risk on this rich-burn gas engine. Record valve stem projection at a 1,000-hour baseline and recheck it on interval to catch recession before it burns through a valve. Test coolant inhibitor concentration at the jacket-water pump, and log oil-pressure and water-temperature readings each run to spot drift early.
Corrective & Common Repairs
Most G333C complaints trace to magneto and governor wear, not the block. Point wear drifts ignition timing, so reset it at the flywheel mark with a timing light rather than trust the last setting. Governor hunting or surging is usually worn linkage, a weak anti-lash spring, wrong buffer-spring tension, or a plugged mixer idle circuit, not the governor itself. Spark plugs run shorter life than on liquid fuel and need heat range matched to load. Watch the gear-driven water pump shaft seal for weep, the first sign it needs reseating.
Overhaul & Rebuild Points
The G333C shares its cylinder block with the D333C diesel and the later G3306 gas engine, a well-understood, rebuildable casting with parts support through that lineage. At major overhaul, inspect exhaust valves and guides for guttering: oil burning onto the sealing face and eating through the valve, a documented failure on engines run light-loaded. Recondition the gear-driven water pump shaft seal, and consider converting magneto ignition to solid-state to cut recurring point and timing work. Confirm bore and stroke against the smaller-bore predecessor block before ordering rebuild parts.
Seasonal & Environment Servicing
As a stationary skid engine, the G333C has no undercarriage or ground conditions to manage; seasonal servicing means ambient temperature and fuel-gas quality. In cold climates, use a jacket-water heater to ease starting instead of a lighter oil, since low-ash Cat NGEO oil ships in one viscosity; switch grease points to Cat EAG below about -20C (-4F). Confirm seasonal field-gas supply matches the methane number this rich-burn engine needs, since a fuel-quality change can trigger detonation. In hot installations, check radiator or heat-exchanger capacity keeps jacket-water temperature in range.
G333C common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 7L-6925 | Oil Filter Assembly | Lubrication service | Check fitment → |
| 1N-5324 | Oil Cooler And Oil Filter | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
G333C attachments & work tools
Ground-engaging work tools
Not applicable. The G333C is a stationary industrial gas engine (G3300 series), typically supplied as a bare engine or skid-mounted power/generator unit. It has no buckets, blades, forks, or other ground-engaging attachments and no coupler system.
Driven-equipment coupling
Output is a flywheel/flywheel-clutch or power take-off arrangement for coupling to a generator, pump, compressor, or similar driven load, not a quick-coupler for interchangeable work tools. Factory options include an enclosed flywheel clutch group and front or rear power take-off/stub-shaft groups for direct drive to the customer's equipment.
Mounting and installation
Engine ships on a factory skid base for mounting to a generator, pump skid, or compressor package. No machine chassis or undercarriage is involved, so there is no dozer/loader-style attachment linkage or hydraulic quick-coupler.
Auxiliary/accessory groups
Optional factory groups relate to engine operation rather than work tools: turbocharger and aftercooler arrangements, remote-mounted heat exchanger or high-capacity radiator cooling packages, auxiliary water pump groups, and various alternator, tachometer, governor (including Woodward governor), and instrument panel groups for genset or industrial control. These are engine support options, not attachments.
Ignition/fuel system options
As a natural-gas engine, factory options cover carburetor and regulator groups and ignition system choices (magneto or distributor-type ignition groups), plus air-starting motor options for sites using compressed air start instead of electric start. These are engine configuration choices, not work-tool related.
All G333C assemblies by section
Every catalogued assembly group for the Caterpillar G333C. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
7l7462 Air Cleaner Group--Type 1
| 7L***62 | Air Cleaner Group | 1 |
6n3685 Air Cleaner Group
| 6N***85 | Air Cleaner Group | 1 |
7l7474 Air Cleaner Group
| 7L***74 | Air Cleaner Group | 1 |
7l7462 Air Cleaner Group--Type 3
| 7L***62 | Air Cleaner Group | 1 |
7l7462 Air Cleaner Group--Type 2
| 7L***62 | Air Cleaner Group | 1 |
2n6961 Clutch Assembly--Type 2
| 2N***61 | Clutch Group | 1 |
2n6961 Clutch Assembly--Type 1
| 2N***61 | Clutch Group | 1 |
2r6914 Flywheel Clutch Group--Type 2
| 2R***14 | Clutch Group-Flywheel | 1 |
2r6914 Enclosed Clutch Group--Type 1
| 2R***14 | Clutch Group-Flywheel | 1 |
3n8423 Contactor Group
| 3N***67 | Contactor Group; Oil Pressure And Water Temperature Contactor Group | 1 |
| 3N***23 | Contactor Group-Press & Temp | 1 |
| 3N***06 | Mounting Group-Contactor; Contactor Mounting Group | 1 |
6l5757 Instrument Panel Group
| 6L***57 | Panel Group-Instrument | 1 |
1n7279 Instrument Panel Group
| 1N***79 | Panel Group-Instrument | 1 |
7s7810 Regulator Assembly
| 7S***10 | Regulator As | 1 |
1p6082 Turbocharger Group
| 1P***82 | Turbocharger Group | 1 |
8l4349 Aftercooler Group--Type 2
| 8L***49 | Aftercooler Group | 1 |
8l4349 Aftercooler Group--Type 1
| 8L***49 | Aftercooler Group | 1 |
2n7759 Alternator Assembly--12 Volt, 35 Ampere
| 2N***59 | Alternator As | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 1
| 1N***33 | Alternator Assembly | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 5
| 1N***33 | Alternator Assembly | 1 |
3n1384 Alternator Assembly--12 Volt--Field Installation
| 1H***87 | Screw-Machine; (10-24x0.438-In) | 3 |
| 2N***80 | Harness As-Wiring; (Alternator) | 1 |
| 2N***78 | Regulator Assembly | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 4
| 1N***33 | Alternator Assembly | 1 |
3n1382 Alternator Assembly--12 Volt--Field Installation
| 2N***80 | Harness As-Wiring; (Alternator) | 1 |
| 2N***96 | Alternator Assembly | 1 |
| 2N***78 | Regulator Assembly | 1 |
2n6396 Alternator Assembly--12 Volt, 35 Ampere--Type 1
| 2N***96 | Alternator Assembly | 1 |
8l5410 Alternator Assembly--12 Volt, 35 Ampere--Type 1
| 8L***10 | Alternator Assembly | 1 |
8l5410 Alternator Assembly--12 Volt, 35 Ampere--Type 2
| 8L***10 | Alternator Assembly | 1 |
2n6396 Alternator Assembly--12 Volt, 35 Ampere--Type 2
| 2N***96 | Alternator Assembly | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 6
| 1N***33 | Alternator Assembly | 1 |
2n6395 Alternator Assembly--12 Volt, 35 Ampere
| 2N***95 | Alternator Assembly | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 2
| 1N***33 | Alternator Assembly | 1 |
3n1383 Alternator Assembly--12 Volt--Field Installation
| 2N***80 | Harness As-Wiring; (Alternator) | 1 |
| 2N***95 | Alternator Assembly | 1 |
| 2N***78 | Regulator Assembly | 1 |
1n9933 Alternator Group--12 Volt, 35 Ampere--Type 3
| 1N***33 | Alternator Assembly | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 1
| 1N***34 | Alternator Group | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 3
| 1N***34 | Alternator Group | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 4
| 1N***34 | Alternator Group | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 2
| 1N***34 | Alternator Group | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 5
| 1N***34 | Alternator Group | 1 |
1n9934 Alternator Group--12 Volt, 35 Ampere--Type 6
| 1N***34 | Alternator Group | 1 |
8l4348 Auxiliary Water Pump And Lines Group-Type 1
| 8L***48 | Auxiliary Water Pump And Lines Group | 1 |
8l4348 Auxiliary Water Pump And Lines Group--Type 2
| 8L***48 | Auxiliary Water Pump And Lines Group | 1 |
8l3896 Auxiliary Water Pump Assembly
| 8L***96 | Auxiliary Water Pump Assembly | 1 |
7l7869 Battery Group--12 Volt, 400 Ampere Hours
| 7L***69 | Battery Group | 1 |
1n8172 Blower Fan Group--26 Inch
| 1N***72 | Blower Fan Group | 1 |
5l1315 Blower Fan Group--26 Inch
| 5L***15 | Blower Fan Group | 1 |
8l4352 Carburetor And Regulator Group--Type 1
| 8L***52 | Carburetor And Regulator Group | 1 |
8l4352 Carburetor And Regulator Group--Type 2
| 8L***52 | Carburetor And Regulator Group | 1 |
2r6853 Clutch Assembly
| 2R***53 | Clutch Assembly | 1 |
3n6867 Oil Pressure And Water Temperature Contactor Group
| 3N***67 | Contactor Group; Oil Pressure And Water Temperature Contactor Group | 1 |
8l4443 Governor Control Group--Positive Lock
| 8L***43 | Control Group-Governor | 1 |
8l4445 Governor Control Group--Remote And Positive Lock
| 8L***45 | Control Group-Governor; Governor Control Group | 1 |
8l4444 Governor Control Group--Vernier And Positive Lock--Type 2
| 8L***44 | Control Group-Governor | 1 |
8l4444 Governor Control Group--Vernier And Positive Lock
| 8L***44 | Control Group-Governor | 1 |
2n6222 Woodward Governor Assembly
| 2N***22 | Crankshaft Group | 1 |
1m5061 Tachometer Drive Group
| 1M***61 | Drive Group-Tachometer | 1 |
4l5789 Tachometer Drive Group
| 4L***89 | Drive Group-Tachometer | 1 |
5l7661 Exhaust Elbow Group
| 5L***61 | Elbow Group-Exhaust; Exhaust Elbow Group | 1 |
7l443 Exhaust Elbow Group-90 Degrees Bend--4 Inch
| 7L***43 | Elbow Group-Exhaust | 1 |
2n1273 Exhaust Elbow Group--90degrees Bend--5 Inch
| 2N***73 | Elbow Group-Exhaust | 1 |
7l3084 Electric Tachometer Group - 24 & 32 Volt
| 5L***45 | Tachometer Assembly 24 Volt Or 32 Volt | 1 |
| 5L***52 | Sending Unit Assembly 12 Or 24 Volt | 1 |
| 7L***84 | Electronic Tachometers; Electric Tachometer Group 24 Volt | 1 |
7l3083 Electric Tachometer Group - 12 Volt
| 5L***34 | Tachometer Assembly --12 Volt | 1 |
| 5L***52 | Sending Unit Assembly 12 Or 24 Volt | 1 |
| 7L***83 | Electronic Tachometers; Electric Tachometer Group 12 Volt | 1 |
8l4867 Expansion Tank And Water Lines Group--Type 1
| 8L***67 | Expansion Tank And Water Lines Group | 1 |
8l4867 Expansion Tank And Water Lines Group--Type 2
| 8L***67 | Expansion Tank And Water Lines Group | 1 |
8l4867 Expansion Tank And Water Lines Group--Type 3
| 8L***67 | Expansion Tank And Water Lines Group | 1 |
2n2029 Fan Drive Belt Tightener Group
| 2N***29 | Fan Drive Belt Tightener Group | 1 |
8l5007 Fan Drive Group
| 8L***07 | Fan Drive Group | 1 |
3n3016 Vertical Exhaust Fitting Group--5 Inch
| 3N***16 | Fitting Group-Exhaust | 1 |
3n3014 Exhaust Fitting Group--Vertical--4 Inch
| 3N***14 | Fitting Group-Exhaust | 1 |
5l9377 Exhaust Fitting Group
| 5L***77 | Fitting Group-Exhaust; Exhaust Flange Group | 1 |
3l4837 Front Auxiliary Drive Group--Crankshaft
| 3L***37 | Front Auxiliary Drive Group | 1 |
5l9894 Instrument Group--12 Volt
| 5L***94 | Gauge Group; -Oil Pressure, Water Temperature | 1 |
5l9895 Instrument Group--24 Or 32 Volt
| 5L***95 | Gauge Group; -Engine Oil Pressure, Water Temperature | 1 |
6l5506 Woodward Governor Assembly
| 6L***06 | Governor Assembly | 1 |
2n2341 Governor Conversion Group--Field Installation
| 2N***41 | Governor Conversion Group | 1 |
6l4074 Heat Exchanger Assembly
| 6L***74 | Heat Exchanger Assembly | 1 |
6l4076 Heat Exchanger Assembly--Remote Mounted
| 6L***76 | Heat Exchanger Assembly | 1 |
7l5474 Heat Exchanger Assembly--Remote Mounted
| 7L***74 | Heat Exchanger Assembly | 1 |
7l5472 Heat Exchanger Assembly
| 7L***72 | Heat Exchanger Assembly | 1 |
2n3904 Ignition Conversion Group--Field Installation
| 2N***04 | Ignition Conversion Group | 1 |
2n2519 Ignition Group--Type 1
| 2N***19 | Ignition Group | 1 |
3n579 Ignition Group--Type 1
| 3N***79 | Ignition Group | 1 |
3n579 Ignition Group--Type 2
| 3N***79 | Ignition Group | 1 |
2n2519 Ignition Group--Type 2
| 2N***19 | Ignition Group | 1 |
2n2519 Ignition Group--Type 3
| 2N***19 | Ignition Group | 1 |
3n528 Magneto Group--Type 3--Replaced By 1w3716 Shown On Page 40e-1
| 3N***28 | Magneto Group | 1 |
1w3716 Magneto Group
| 1W***16 | Magneto Group | 1 |
3n528 Magneto Group--Type 1
| 3N***28 | Magneto Group | 1 |
3n528 Magneto Group--Type 2
| 3N***28 | Magneto Group | 1 |
Mechanical Tachometer
| 5L***75 | Flexible Shaft-- 15 Foot; Flexible Shaft --15 Foot | 1 |
| 5L***64 | Drive Group-Tachometer | 1 |
| 5L***13 | Flexible Shaft-- 20 Foot | 1 |
8l4047 Air Starting Motor Group--Type 2
| 8L***47 | Motor Group | 1 |
8l4047 Air Starting Motor Group--Type 1
| 8L***47 | Motor Group | 1 |
3n8806 Contactor Mounting Group--Type 2
| 3N***06 | Mounting Group-Contactor; Contactor Mounting Group | 1 |
3n8806 Contactor Mounting Group--Type 1
| 3N***06 | Mounting Group-Contactor; Contactor Mounting Group | 1 |
3n8806 Contactor Mounting Group--Type 3
| 3N***06 | Mounting Group-Contactor; Contactor Mounting Group | 1 |
3n8806 Contactor Mounting Group--Type 4
| 3N***06 | Mounting Group-Contactor; Contactor Mounting Group | 1 |
7l4535 Tachometer Mounting Group--Type 2
| 7L***35 | Mounting Group-Tachometer; Tachometer Mounting Group[[75 | 1 |
7l4535 Tachometer Mounting Group--Type 1
| 7L***35 | Mounting Group-Tachometer; Tachometer Mounting Group[[75 | 1 |
5l8649 Exhaust Pipe Group--4 Inch
| 5L***49 | Pipe Group-Exhaust | 1 |
5l8632 Exhaust Pipe Group--5 Inch
| 5L***32 | Pipe Group-Exhaust | 1 |
3n6128 Crankshaft Pulley Group
| 3N***28 | Pulley Group-Crankshaft | 1 |
1n8070 Radiator Group--High Capacity--Type 4
| 1N***70 | Radiator Group | 1 |
8l9332 Radiator Group--Type 1
| 8L***32 | Radiator Group | 1 |
1n8070 Radiator Group--High Capacity--Type 3
| 1N***70 | Radiator Group | 1 |
1n8070 Radiator Group--High Capacity--Type 5
| 1N***70 | Radiator Group | 1 |
8l9332 Radiator Group--Type 2
| 8L***32 | Radiator Group | 1 |
1n8070 Radiator Group--High Capacity--Type 6
| 1N***70 | Radiator Group | 1 |
8l9332 Radiator Group--Type 3
| 8L***32 | Radiator Group | 1 |
1n8070 Radiator Group--Type 1
| 1N***70 | Radiator Group | 1 |
1n8070 Radiator Group--High Capacity--Type 2
| 1N***70 | Radiator Group | 1 |
5l9879 Safety Contactor Group
| 5L***79 | Safety Contactor Group | 1 |
6l2691 Stub Shaft Group--Front Mounted--Type 2
| 6L***91 | Shaft Group-Stub | 1 |
6l2692 Stub Shaft Group--Rear Mounted
| 6L***92 | Shaft Group-Stub; -Rear Mounted | 1 |
6l2691 Stub Shaft Group--Front Mounted--Type 1
| 6L***91 | Shaft Group-Stub | 1 |
5l9684 Skid Base Group--Top View
| 5L***84 | Skid Base Group | 1 |
8l5052 Air Starting Motor Assembly--Type 2
| 8L***52 | Starting Motor Assembly | 1 |
8l5052 Air Starting Motor Assembly--Type 1
| 8L***52 | Starting Motor Assembly | 1 |
4n4370 Air Motor Group--Type 2
| 4N***70 | Starting Motor Group-Air | 1 |
4n5712 Air Starting Motor Group--Type 2
| 4N***12 | Starting Motor Group-Air | 1 |
4n4370 Air Motor Group--Type 1
| 4N***70 | Starting Motor Group-Air | 1 |
4n5712 Air Starting Motor Group--Type 1
| 4N***12 | Starting Motor Group-Air | 1 |
1n8170 Suction Fan Group--26 Inch
| 1N***70 | Suction Fan Group | 1 |
5l1314 Suction Fan Group--26 Inch
| 5L***14 | Suction Fan Group | 1 |
5n1933 Power Take-Off Support Group--Clutch
| 5N***33 | Support Group-Power Take-Off | 1 |
4l2353 Tachometer Group--Type 1
| 4L***53 | Tachometer Group-Electric; Electric Tachometer Group | 1 |
4l2353 Tachometer Group--Type 2
| 4L***53 | Tachometer Group-Electric; Electric Tachometer Group | 1 |
3n6871 Electric Tachometer Group--0-2500 R.P.M.--Type 2
| 3N***71 | Tachometer Group-Electric; Tachometer Group | 1 |
3n6871 Electric Tachometer Group--Type 1
| 3N***71 | Tachometer Group-Electric; Tachometer Group | 1 |
1l5010 Air Receiver Group
| 1L***10 | Tank Group-Air | 1 |
8l4350 Turbocharger & Aftercooled Conversion Arrangement--Type 2
| 1B***31 | Nut-Rops Mounting Bracket To Fender Rear | 1 |
| 1D***99 | Bolt Plate To Head | 2 |
| 2N***67 | Rod Governor To Carburetor | 1 |
8l4350 Turbocharged & Aftercooled Conversion Arrangement--Type 3
| 1B***31 | Nut-Rops Mounting Bracket To Fender Rear | 1 |
| 1D***99 | Bolt Plate To Head | 2 |
| 2N***67 | Rod Governor To Carburetor | 1 |
8l4350 Turbocharged & Aftercooled Conversion Arrangement--Type 1
| 1B***30 | Nut-- Flame Arrestor Or Adapter To Pipe Assembly | 2 |
| 1B***31 | Nut-Rops Mounting Bracket To Fender Rear | 1 |
| 1D***99 | Bolt Plate To Head | 2 |
8l4351 Turbocharger And Mounting Group
| 8L***51 | Turbocharger And Mounting Group | 1 |
3s4422 Turbocharger Assembly
| 3S***22 | Turbocharger Assembly | 1 |
1p3954 Turbocharger Cartridge Assembly
| 1P***54 | Turbocharger Cartridge Assembly | 1 |
1l5011 Regulating And Pressure Reducing Valve Group
| 1L***11 | Valve Group-Starting Air | 1 |
6l3093 Exhaust Fitting Group--5 Inch
| 6L***93 | Vertical Exhaust Fitting Group | 1 |
5l8602 Vertical Exhaust Fitting Group--4 Inch
| 5L***02 | Vertical Exhaust Fitting Group | 1 |
3l9921 Whistle Valve Assembly
| 3L***21 | Whistle Valve Assembly | 1 |
8l4890 Woodward Governor And Drive Group--Type 1
| 8L***90 | Woodward Governor And Drive Group | 1 |
8l4890 Woodward Governor And Drive Group--Type 2
| 8L***90 | Woodward Governor And Drive Group | 1 |
2n1279 Woodward Governor And Drive Group
| 2N***79 | Woodward Governor And Drive Group | 1 |
Engine
7l6925 Oil Filter Assembly
| 7L***25 | Oil Filter Assembly | 1 |
7l472 Connecting Rod And Piston Group--10.5 : 1 Ratio--6 Required
| 7L***72 | Piston & Rod Group; Connecting Rod & Piston Group | 1 |
Alternator And Drive--12 Volt, 35 Ampere
8l5412 Alternator Assembly--12 Volt, 35 Ampere
| 8L***12 | Alternator Assembly | 1 |
5s6438 Camshaft Group
| 5S***38 | Camshaft | 1 |
2n6482 Carburetor And Air Cleaner Group
| 2N***82 | Carburetor And Air Cleaner | 1 |
Carburetor And Air Cleaner (2n6482 N/S)
| 2N***82 | Carburetor And Air Cleaner | 1 |
Carburetor And Air Cleaner (7l464 N/S)
| 7L***64 | Carburetor And Air Cleaner | 1 |
6l4554 Carburetor Assembly--Natural Gas
| 6L***54 | Carburetor As | 1 |
Carburetor Control (8l4839 N/S)
| 8L***39 | Carburetor Control | 1 |
8n6389 Governor Cover Group
| 8N***89 | Cover Group-Governor | 1 |
7l258 Crankshaft Group
| 7L***58 | Crankshaft; Crankshaft Group | 1 |
Crankshaft Bearing And Plate Replacements
7l259 Cylinder Block Covers Group--Side View--Part 1 Of 2
| 7L***59 | Cylinder Block And Covers | 1 |
7l259 Cylinder Block And Covers Group--Side View--Part 1 Of 2
| 7L***59 | Cylinder Block And Covers | 1 |
7l259 Cylinder Block And Covers Group--End View--Part 2 Of 2
| 7L***59 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers--Side View--Part 1 Of 2
Cylinder Block And Covers--End View-Part 2 Of 2
2p8776 Cylinder Block Assembly
| 2P***76 | Cylinder Block As | 1 |
Cylinder Block Assembly
5s6778 Cylinder Block Assembly
| 5S***78 | Cylinder Block Assembly | 1 |
7l470 Cylinder Head And Valve Mechanism Group--Side View--Part 1 Of 2
| 7L***70 | Cylinder Head And Valve Mechanism Group | 1 |
7l470 Cylinder Head And Valve Mechanism Group--End View--Part 2 Of 2
| 7L***70 | Cylinder Head And Valve Mechanism Group | 1 |
Cylinder Head Assembly
3n517 Cylinder Head Assembly
| 3N***17 | Cylinder Head Assembly | 1 |
Electric Starting Motor--12 Volt
Engine Support (1n5571 N/S)
| 1N***71 | Engine Support Group | 1 |
7l5222 Exhaust Elbow Group
| 7L***22 | Exhaust Elbow Group | 1 |
5l8592 Exhaust Flange Group
| 5L***92 | Flange Group-Exhaust | 1 |
Flywheel (8l5074 N/S)
| 8L***74 | Flywheel | 1 |
Gasket Kits
| 8S***67 | Water Pump | 0 |
| 9S***00 | Valve Grinding | 0 |
| 9S***01 | Engine Complete | 0 |
7s9461 Oil Pump Group--Double Section
| 7S***61 | Gear Pump Group | 1 |
Governor And Drive (2n2175 N/S)--Part 3 Of 3
| 2N***75 | Governor & Drive Group | 1 |
Governor And Drive (2n2175 N/S)--Part 1 Of 3
| 2N***75 | Governor & Drive Group | 1 |
Governor And Drive (2n2175 N/S)--Part 2 Of 3
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 1 Of 3--Type 1
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 1 Of 3--Type 2
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 3 Of 3--Type 3
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 1 Of 3--Type 3
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 3 Of 3--Type 1
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 2 Of 3--Type 3
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 2 Of 3--Type 2
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 2 Of 3--Type 1
| 2N***75 | Governor & Drive Group | 1 |
2n2175 Governor And Drive Group--Part 3 Of 3--Type 2
| 2N***75 | Governor & Drive Group | 1 |
7l463 Governor And Drive Group--Part 2 Of 3
| 7L***63 | Governor And Drive Group | 1 |
7l463 Governor And Drive Group--Part 3 Of 3
| 7L***63 | Governor And Drive Group | 1 |
2n3897 Governor And Drive Group
| 2N***97 | Governor And Drive Group | 1 |
7l463 Governor And Drive Group--Part 1 Of 3
| 7L***63 | Governor And Drive Group | 1 |
2n2483 Housing Assembly
| 2N***83 | Housing Assembly | 1 |
7l462 Ignition Group
| 7L***62 | Ignition | 1 |
Ignition (7l462 N/S)
| 7L***62 | Ignition | 1 |
7l462 Ignition Group--Type 1
| 7L***62 | Ignition | 1 |
7l462 Ignition Group--Type 2
| 7L***62 | Ignition | 1 |
Instrument Panel (5l9022 N/S)--Shut-Off
| 5L***22 | Instrument Panel | 1 |
7l3030 Magneto Assembly--Type 3
| 7L***30 | Magneto As | 1 |
7l3030 Magneto Assembly--Type 1
| 7L***30 | Magneto As | 1 |
7l3030 Magneto Assembly--Type 2
| 7L***30 | Magneto As | 1 |
3n3839 Magneto Drive Conversion Group--Field Installation
| 3N***39 | Magneto Drive Conversion Group | 1 |
8l4056 Magneto Drive Gear Group
| 8L***56 | Magneto Drive Gear Group | 1 |
7l469 Magneto Drive Group
| 7L***69 | Magneto Drive Group | 1 |
Oil Cooler And Oil Filter
Oil Cooler And Oil Filter (1n5324 N/S)
| 1N***24 | Oil Cooler And Oil Filter | 1 |
2n508 Oil Cooler And Oil Filter Group
| 2N***08 | Oil Cooler And Oil Filter Group | 1 |
Oil Filler And Breather Group
8s5022 Oil Pump Group
| 8S***22 | Oil Pump | 1 |
6n2820 Oil Pump Group--Double Section
| 6N***20 | Oil Pump Group | 1 |
7n4715 Oil Pump Idler Gear Assembly
| 7N***15 | Oil Pump Idler Gear Assembly | 1 |
8l3886 Service Meter Group
| 8L***86 | Service Meter Group | 1 |
7l6586 Solenoid Switch Assembly
| 7L***86 | Solenoid As | 1 |
9l3597 Motor Assembly--12 Volt--Part 1 Of 2--Type 3
| 9L***97 | Starting Motor Group-Electric | 1 |
9l3597 Motor Assembly--12 Volt--Part 2 Of 2--Type 2
| 9L***97 | Starting Motor Group-Electric | 1 |
9l3597 Motor Assembly--12 Volt--Part 1 Of 2--Type 2
| 9L***97 | Starting Motor Group-Electric | 1 |
9l3597 Motor Assembly--12 Volt--Part 2 Of 2--Type 1
| 9L***97 | Starting Motor Group-Electric | 1 |
9l3597 Motor Assembly--12 Volt--Part 2 Of 2--Type 3
| 9L***97 | Starting Motor Group-Electric | 1 |
9l3597 Motor Assembly--12 Volt--Part 1 -- Type 1
| 9L***97 | Starting Motor Group-Electric | 1 |
7l468 Water Cooled Exhaust Manifold Group
| 7L***68 | Water Cooled Exhaust Manifold Group | 1 |
8l4067 Water Pump Group
| 8L***67 | Water Pump Group | 1 |
Engine Arrangement
Engine Arrangements
| 2N***08 | Oil Cooler And Oil Filter Group | 1 |
| 5S***38 | Camshaft | 1 |
| 7L***58 | Crankshaft; Crankshaft Group | 1 |
Generators
5n21 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***21 | Generator Group | 1 |
5n22 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***22 | Generator Group | 1 |
5n14 Generator--3 Phase--Side View--Part 1 Of 2
| 5N***14 | Generator Group | 1 |
5n14 Generator--3 Phase--End View--Part 2 Of 2
| 5N***14 | Generator Group | 1 |
5n17 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***17 | Generator Group | 1 |
5n16 Generator--3 Phase--End View--Part 2 Of 2
| 5N***16 | Generator Group | 1 |
5n17 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***17 | Generator Group | 1 |
5n19 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***19 | Generator Group | 1 |
5n15 Generator--3 Phase--Side View--Part 1 Of 2
| 5N***15 | Generator Group | 1 |
5n18 Generator Group--3 Phase--End View--Part 2 Of 2
| 5N***18 | Generator Group | 1 |
5n14 Generator-3 Phase--Side View--Part 1 Of 2
| 5N***14 | Generator Group | 1 |
5n22 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***22 | Generator Group | 1 |
5n21 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***21 | Generator Group | 1 |
5n15 Generator Group--3 Phase--End View--Part 2 Of 2
| 5N***15 | Generator Group | 1 |
5n18 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***18 | Generator Group | 1 |
5n15 Generator--3 Phase--End View--Part 2 Of 2
| 5N***15 | Generator Group | 1 |
5n19 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***19 | Generator Group | 1 |
5n18 Generator Assembly--3 Phase--Side View - Part 1 Of 2
| 5N***18 | Generator Group | 1 |
5n16 Generator--3 Phase--Side View--Part 1 Of 2
| 5N***16 | Generator Group | 1 |
5n18 Generator Assembly--3 Phase--End View - Part 2 Of 2
| 5N***18 | Generator Group | 1 |
5n18 Generator Group--3 Phase--End View - Part 2 Of 2
| 5N***18 | Generator Group | 1 |
5n15 Generator Group--3 Phase--Side View--Part 1 Of 2
| 5N***15 | Generator Group | 1 |
5n18 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***18 | Generator Group | 1 |
5n18 Generator Group--3 Phase--Side View - Part 1 Of 2
| 5N***18 | Generator Group | 1 |
5n22 Generator Assembly--3 Phase--End View--Part 1 Of 2
| 5N***22 | Generator Group | 1 |
5n18 Generator Group--3 Phase--Side View--Part 1 Of 2
| 5N***18 | Generator Group | 1 |
5n22 Generator Assembly--3 Phase--Side View--Part 2 Of 2
| 5N***22 | Generator Group | 1 |
5n2658 Rotor Assembly
| 5N***58 | Rotor As | 1 |
5n2656 Rotor Assembly
| 5N***56 | Rotor As | 1 |
5n2655 Rotor Assembly
| 5N***55 | Rotor As | 1 |
3n6710 Extension Terminal Box Group
| 3N***10 | Box Group-Extension Terminal | 1 |
3n5566 Generator Connection Box Group
| 3N***66 | Box Group-Generator Connection | 1 |
5l8091 Air Cleaner Cap Group
| 5L***91 | Cap Group-Air Cleaner; Air Cleaner Cap Group | 1 |
6l3916 Generator Drive Coupling Group--Type 2
| 6L***16 | Coupling Group-Generator Drive; Generator Drive Coupling Gp | 1 |
6l3916 Generator Drive Coupling Group--Type 1
| 6L***16 | Coupling Group-Generator Drive; Generator Drive Coupling Gp | 1 |
2n7749 Exciter And Regulator Assembly--Part 1 Of 2--Type 3
| 2N***49 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 1 Of 2--Type 3
| 2N***52 | Exciter And Regulator Assembly | 1 |
1n5915 Exciter And Regulator Assembly--Part 2 Of 2
| 1N***15 | Exciter And Regulator Assembly | 1 |
2n7749 Exciter And Regulator Assembly--Part 2 Of 2--Type 3
| 2N***49 | Exciter And Regulator Assembly | 1 |
1n5916 Exciter And Regulator Assembly--Part 2 Of 2
| 1N***16 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 2 Of 2--Type 1
| 2N***52 | Exciter And Regulator Assembly | 1 |
1n5916 Exciter And Regulator Assembly--Part 1 Of 2
| 1N***16 | Exciter And Regulator Assembly | 1 |
1n5915 Exciter And Regulator Assembly--Part 1 Of 2
| 1N***15 | Exciter And Regulator Assembly | 1 |
2n7749 Exciter And Regulator Assembly--Part 1 Of 2--Type 1
| 2N***49 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 2 Of 2--Type 3
| 2N***52 | Exciter And Regulator Assembly | 1 |
2n7749 Exciter And Regulator Assembly--Part 2 Of 2--Type 1
| 2N***49 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 1 Of 2--Type 2
| 2N***52 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 1 Of 2--Type 1
| 2N***52 | Exciter And Regulator Assembly | 1 |
2n7052 Exciter And Regulator Assembly--Part 2 Of 2--Type 2
| 2N***52 | Exciter And Regulator Assembly | 1 |
2n7749 Exciter And Regulator Assembly--Part 2 Of 2--Type 2
| 2N***49 | Exciter And Regulator Assembly | 1 |
2n7749 Exciter And Regulator Assembly--Part 1 Of 2--Type 2
| 2N***49 | Exciter And Regulator Assembly | 1 |
8l4454 Flexible Fuel Lines Group
| 8L***54 | Flexible Fuel Lines Group | 1 |
8l21 Generator--3 Phase--Part 2 Of 2
| 8L***21 | Generator | 1 |
8l53 Generator--3 Phase--Part 3 Of 3--Type 2
| 8L***53 | Generator | 1 |
8l58 Generator--3 Phase--Side View--Part 1 Of 2
| 8L***58 | Generator | 1 |
8l55 Generator--3 Phase--Part 3 Of 3--Type 2
| 8L***55 | Generator | 1 |
8l56 Generator--3 Phase--Part 3 Of 3--Type 1
| 8L***56 | Generator | 1 |
8l56 Generator--3 Phase--Part 2 Of 3--Type 2
| 8L***56 | Generator | 1 |
7l82 Generator--3 Phase--Part 2 Of 3
| 7L***82 | Generator | 1 |
8l21 Generator--3 Phase--Part 1 Of 2
| 8L***21 | Generator | 1 |
8l54 Generator--3 Phase--Part 3 Of 3--Type 2
| 8L***54 | Generator | 1 |
8l54 Generator--3 Phase--Part 3 Of 3--Type 1
| 8L***54 | Generator | 1 |
8l55 Generator--3 Phase--Part 3 Of 3
| 8L***55 | Generator | 1 |
8l54 Generator--3 Phase--Part 1 Of 3
| 8L***54 | Generator | 1 |
8l54 Generator--3 Phase--Part 2 Of 3
| 8L***54 | Generator | 1 |
8l53 Generator--3 Phase--Part 1 Of 3
| 8L***53 | Generator | 1 |
8l55 Generator--3 Phase--Part 1 Of 3
| 8L***55 | Generator | 1 |
7l79 Generator--3 Phase--Part 3 Of 3
| 7L***79 | Generator | 1 |
8l57 Generator--3 Phase--Side View--Part 1 Of 2
| 8L***57 | Generator | 1 |
8l20 Generator--3 Phase--Part 1 Of 2
| 8L***20 | Generator | 1 |
8l55 Generator--3 Phase--Part 1 Of 3--Type 1
| 8L***55 | Generator | 1 |
8l56 Generator--3 Phase--Part 2 Of 3--Type 1
| 8L***56 | Generator | 1 |
8l56 Generator--3 Phase--Part 3 Of 3
| 8L***56 | Generator | 1 |
7l80 Generator--3 Phase--Part 3 Of 3
| 7L***80 | Generator | 1 |
8l53 Generator--3 Phase--Part 2 Of 3
| 8L***53 | Generator | 1 |
7l80 Generator--3 Phase--Part 2 Of 3
| 7L***80 | Generator | 1 |
8l55 Generator--3 Phase--Part 3 Of 3--Type 1
| 8L***55 | Generator | 1 |
8l53 Generator--3 Phase--Part 2 Of 3--Type 2
| 8L***53 | Generator | 1 |
8l53 Generator--3 Phase--Part 3 Of 3
| 8L***53 | Generator | 1 |
7l81 Generator--3 Phase--Part 1 Of 3
| 7L***81 | Generator | 1 |
8l53 Generator--3 Phase--Part 1 Of 3--Type 1
| 8L***53 | Generator | 1 |
7l82 Generator--3 Phase--Part 3 Of 3
| 7L***82 | Generator | 1 |
7l79 Generator--3 Phase--Part 1 Of 3
| 7L***79 | Generator | 1 |
8l55 Generator--3 Phase--Part 2 Of 3--Type 2
| 8L***55 | Generator | 1 |
8l54 Generator--3 Phase--Part 2 Of 3--Type 1
| 8L***54 | Generator | 1 |
7l82 Generator--3 Phase--Part 1 Of 3
| 7L***82 | Generator | 1 |
8l58 Generator--3 Phase--End View--Part 2 Of 2
| 8L***58 | Generator | 1 |
8l56 Generator--3 Phase--Part 1 Of 3--Type 1 Of 3
| 8L***56 | Generator | 1 |
8l56 Generator--3 Phase--Part 2 Of 3
| 8L***56 | Generator | 1 |
8l20 Generator--3 Phase--Part 2 Of 2
| 8L***20 | Generator | 1 |
7l80 Generator--3 Phase--Part 1 Of 3
| 7L***80 | Generator | 1 |
7l81 Generator--3 Phase--Part 3 Of 3
| 7L***81 | Generator | 1 |
8l56 Generator--3 Phase--Part 1 Of 3--Type 2
| 8L***56 | Generator | 1 |
8l57 Generator--3 Phase--End View--Part 2 Of 2
| 8L***57 | Generator | 1 |
8l55 Generator--3 Phase--Part 1 Of 3--Type 2
| 8L***55 | Generator | 1 |
8l53 Generator--3 Phase--Part 3 Of 3--Type 1
| 8L***53 | Generator | 1 |
8l54 Generator--3 Phase--Part 1 Of 3--Type 1
| 8L***54 | Generator | 1 |
7l79 Generator--3 Phase--Part 2 Of 3
| 7L***79 | Generator | 1 |
8l54 Generator--3 Phase--Part 1 Of 3--Type 2
| 8L***54 | Generator | 1 |
7l81 Generator--3 Phase--Part 2 Of 3
| 7L***81 | Generator | 1 |
8l55 Generator--3 Phase--Part 2 Of 3
| 8L***55 | Generator | 1 |
8l53 Generator--3 Phase--Part 1 Of 3--Type 2
| 8L***53 | Generator | 1 |
8l54 Generator--3 Phase--Part 2 Of 3--Type 2
| 8L***54 | Generator | 1 |
8l54 Generator--3 Phase--Part 3 Of 3
| 8L***54 | Generator | 1 |
8l56 Generator--3 Phase--Part 3 Of 3--Type 2
| 8L***56 | Generator | 1 |
8l55 Generator--3 Phase--Part 2 Of 3--Type 1
| 8L***55 | Generator | 1 |
8l53 Generator--3 Phase--Part 2 Of 3--Type 1
| 8L***53 | Generator | 1 |
8l56 Generator--3 Phase--Part 1 Of 3
| 8L***56 | Generator | 1 |
5n20 Generator Assembly--3 Phase--Side View--Part 1 Of 2
| 5N***20 | Generator Assembly | 1 |
5n20 Generator Assembly--3 Phase--End View--Part 2 Of 2
| 5N***20 | Generator Assembly | 1 |
3n4085 Generator Installation Arrangement
8l8421 Generator Installation Arrangement-
| 0S***70 | Cap Screw (5/8" Long) | 8 |
| 0T***72 | Bolt; 7/16" Diameter X 1 1/2" Length Generator To Engine | 12 |
| 1B***01 | Nut Generator Line Leads; Nut-Generator Line Leads | 8 |
5n3379 Generator Installation Arrangement--Type 2
| 3H***68 | Bolt-- Bracket To Starting Engine Timing Gear Housing | 12 |
| 5N***79 | Installation Ar-Generator | 1 |
| 5P***44 | Washer-Hard; (12x22.5x2.5-mm Thk) | 12 |
5n3379 Generator Installation Arrangement--Type 1
| 0S***70 | Cap Screw (5/8" Long) | 8 |
| 0T***72 | Bolt; 7/16" Diameter X 1 1/2" Length Generator To Engine | 12 |
| 1B***01 | Nut Generator Line Leads; Nut-Generator Line Leads | 8 |
3n7748 Regulator Assembly
| 3N***48 | Regulator As | 1 |
3n7751 Regulator Assembly
| 3N***51 | Regulator As; Circuit Breaker 125 Amperes | 1 |
5n8 Regulator Assembly
| 5N***08 | Regulator As | 1 |
5n9 Regulator Assembly
| 5N***09 | Regulator Assembly | 1 |
3n6094 Exciter Modification Service Group
| 3N***94 | Resistor Group | 1 |
3n2235 Rotor Assembly--Replaced By 5n2656 Shown On Page 227
| 3N***35 | Rotor Assembly | 1 |
3n2236 Rotor Assembly--Replaced By 5n2658 Shown On Page 227b
| 3N***36 | Rotor Assembly | 1 |
3n9112 Rotor Assembly--Replaced By 5n2658 Shown On Page 227b
| 3N***12 | Rotor Assembly | 1 |
3n6015 Rotor Assembly--Replaced By 5n2656 Shown On Page 227
| 3N***15 | Rotor Assembly | 1 |
3n6016 Rotor Assembly--Replaced By 5n2658 Shown On Page 227b
| 3N***16 | Rotor Assembly | 1 |
3n9110 Rotor Assembly--Replaced By 5n2656 Shown On Page 227
| 3N***10 | Rotor Assembly | 1 |
3n7263 Rotor Assembly--Replaced By 5n2655 Shown On Page 226
| 3N***63 | Rotor Assembly | 1 |
3n9109 Rotor Assembly--Replaced By 5n2655 Shown On Page 226
| 3N***09 | Rotor Assembly | 1 |
Service Equipment And Supplies
8f9866 Grease Gun
| 8F***66 | Grease Gun As | 1 |
Name Plates And Transfers
| 3L***26 | Plate-Information; (Compression Ratio)(Install On Lh Side Of Block) | 1 |
| 3N***90 | Plate Serial Number; On R.H. Rear Bank Of Cylinder Block As Viewed From Rear Of Engine | 1 |
| 4B***58 | Screw (Identification Plate) Mounting | 2 |
4l1560 Tool Group
| 4L***60 | Tool Group | 1 |
9s7977 Tool Group
| 9S***77 | Tool Group-Hand | 1 |
G333C serial number reference
The PIN/serial plate on a G333C is a metal tag attached to the engine block, usually near the flywheel housing or on the fuel pump/accessory side rather than on a separate machine frame (this is a bare industrial engine, not a chassis). As a pre-2000-style Cat industrial engine, the plate shows a 3-character prefix (letters/numbers) followed directly by a sequence number, not the later 17-character PIN format -- read the first 3 characters as the prefix.
| Prefix | Identifies | Notes |
|---|---|---|
| 68D | G333C gas engine (Cat 333-series industrial gas engine, predecessor to the G3306 gas engine line) | Confirmed in the standard Cat serial-number prefix reference: S/N 68D and up ties to the G333C nameplate. Naturally aspirated inline-six spark-ignited industrial/gen-set gas engine, sibling to the diesel D333C built on the same older engine platform that the later G3306 line replaced. The same reference also lists prefix 68D against the newer G3306 gas engine -- Cat prefix blocks were sometimes reused across widely separated model eras, so this one isn't exclusive to G333C. If the plate or parts-book doesn't clearly confirm G333C on your unit, verify the full serial with your dealer. Exact production/build-date range not documented in available sources. |
Frequently asked questions
What engine powers the Caterpillar G333C?
The G333C is itself the engine: a Caterpillar spark-ignited natural-gas industrial engine, inline-6, four-stroke, built on the same cylinder-block architecture (120.6 mm x 152.4 mm / 4-3/4 in x 6 in bore and stroke, about 10.5 L / 638 cu in displacement) as the diesel D333C industrial engine of the same era. It runs magneto ignition and a Woodward mechanical governor, with no electronic engine controls.
What is the operating weight of the G333C?
Caterpillar did not publish an external weight or dimension spec for the G333C in surviving records. As a bare or skid-mounted industrial engine sold without a chassis, its footprint varied by mounting skid, radiator, and accessory package. What is documented is the engine architecture itself: an inline-6 displacing roughly 10.5 L (638 cu in) on the shared 120.6 mm x 152.4 mm bore and stroke. Check the OEM parts or service manual for your specific serial prefix (68D and up) if a nameplate weight was recorded for your build.
What replaced the Caterpillar G333C?
The G333C was directly succeeded by the Caterpillar G3306 natural-gas engine, built on the same cylinder block. Parts commonality between the two covers common wear items, reflecting that shared core architecture even though the G333C's own serial-prefix production (68D and up) predates the G3306 naming.
What G333C owners discuss
What's the general reputation of the G333C among people who actually work on it?
Coverage of the G333C by name is thin: it predates most spec databases and rarely comes up on its own in engine discussion boards. What does surface is discussion of the shared cylinder block, 120.7 mm bore and 152.4 mm stroke (4.75 in x 6 in), that carries forward into the later G3306 gas engine line. Techs who trace a G333C serial back through that lineage generally call the block a durable, easily rebuilt industrial casting rather than a problem engine. Treat any specific behavior claim below as extrapolated from the 3306 gas-engine family rather than G333C-specific testimony, since dedicated G333C write-ups are scarce.
What's a known quirk with the ignition system?
The G333C runs breaker-point magneto ignition, timed off the No. 1 piston at compression stroke against a flywheel pointer and then fine-tuned with a timing light at rated speed. Two habits get repeated in shared-block service discussion: timing drifts as the points wear, so recheck it at every service interval instead of trusting a one-time set, and early flywheels often lack factory timing calibration, so the mark has to be laid out by hand. A common upgrade path discussed for magneto-and-points engines of this vintage is converting to solid-state ignition to cut the recurring point and timing maintenance. Have your dealer or a qualified magneto shop verify timing and point condition before putting the engine back into service.
What causes governor hunting or surging on this type of engine?
Mechanically governed industrial engines like this one draw regular hunting and surging complaints, and the consensus among people who work on comparable Woodward-governed gas engines is that the governor itself is rarely the actual cause. More often it's worn or binding governor linkage, a missing or weak anti-lash spring, incorrect buffer spring tension, or a partly plugged mixer or carburetor idle circuit. Work the linkage and fuel-metering path first before condemning the governor. Have your dealer or a governor specialist verify governor and linkage adjustment on a running engine, since a misadjusted governor can allow an overspeed condition.
What wear pattern should owners expect from running this engine on natural gas?
Natural gas gives none of the lubricating or cleaning action a liquid fuel does, so gas-fired engines from this block family run hardened valves and seats, but the valves still recede with hours. Accepted practice is to trend valve stem projection rather than judge wear by feel, recording a baseline around 1,000 hours after any head work as the beat-in point and comparing later readings against it. A documented failure on a related natural-gas engine from this same block family shows the other side of it: running well below rated load for long stretches lets oil work past the valve guides and bake onto the exhaust valve sealing face, eventually burning a leak path through the valve. Keep load near the engine's rating where practical and watch oil consumption as an early warning sign.
Is there a known cooling-system weak point on this engine?
The block generation the G333C is built on uses a gear-driven jacket water pump mounted forward on the left front cover, a change from the earlier, smaller-bore block that could run either a belt-driven or gear-driven pump. People restoring engines of this block generation flag the gear-drive pump's shaft seal as a wear item worth checking on anything that has sat idle. A leaking seal shows coolant weep at the pump body first and, left unchecked, coolant working into the oil pan. The pump style also doubles as a visual cue for confirming which bore generation of block is actually on hand.
What should owners know about spark plug life and heat range?
General practice repeated for magneto and battery-ignition industrial gas engines of this era is to match plug heat range to load and fuel gas quality, and to expect shorter plug life than on a liquid-fuel engine since there is no fuel wash to keep the plug clean. Reported service life on comparable low- to medium-compression industrial gas engines runs from several thousand hours down to roughly half that on higher-compression or dirtier fuel-gas applications, with a regap at every inspection. Confirm gap and heat range against the engine's own tag data rather than a generic gas-engine figure, since this varies by application.
What should a buyer check before purchasing a used G333C?
Because the G333C rarely comes up for individual discussion, a buyer is mostly leaning on general practice for old industrial gas engines of this type: confirm compression is even across all cylinders, check magneto and point condition and confirm the flywheel can actually be timed (missing or worn timing marks are common on units this old), inspect the gear-driven water pump for shaft-seal weep, check for coolant in the oil, and ask for load and hours history, since extended low-load running is a documented cause of valve and oil-consumption trouble on this block family. Verify the serial prefix and bore and stroke, since a smaller-bore sibling block shares a confusingly similar model number. Have your dealer or an independent industrial-engine shop compression-test the cylinders and inspect the ignition and governor systems before returning a purchased unit to service.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Need a specific G333C part?
Search live OEM part data, check fitment, and cross-reference alternatives with Heavy Parts AI.