Service parts for the G8.3 Series
Grouped by system, with how many of each the parts manual calls for.
Air intake
1 requiredFuel system
1 requiredOil system
1 requiredBelts
1 requiredPrices captured from merchant listings; some links are affiliate links. Confirm against your serial number before ordering.
Specifications
Ratings spec sheet not in our library yet — see the documents below.
Maintenance & consumables
for the Cummins/Onan G8.3| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | Air Cleaner Element, Paper Type | 05e00014 | Amazon eBay | ||
| Fuel filter | NG | 05900828 | 250 hr | Amazon eBay | |
| Oil filter | 3375049 | 1500 hr | Amazon eBay | ||
| Battery | — | ||||
| Belt | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | 3822524 | Amazon eBay | ||
| Coolant | — | ||||
| Coolant filter | — | 1500 hr | |||
| Oil | — | 250 hr | |||
| Spark plug | — | 1500 hr |
Common questions
Which engine powers the Cummins/Onan G8.3 Series?
The Cummins/Onan G8.3 Series is powered by the Cummins/Onan G8.3 engine.
What oil filter fits the Cummins/Onan G8.3 Series?
The Cummins/Onan G8.3 Series uses oil filter part number 3375049.
What fuel filter does the Cummins/Onan G8.3 Series use?
The Cummins/Onan G8.3 Series uses fuel filter part number 05900828.
What air filter does the Cummins/Onan G8.3 Series use?
The Cummins/Onan G8.3 Series uses air filter part number 05e00014.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Coolant Loss - External | - Coolant level is above specification - External coolant leak - Radiator cap is not correct, is malfunctioning, or has low-pressure rating - Fill line or vent lines are restricted, obstructed, or not routed correctly - Coolant fill line is restricted or obstructed | Check the coolant level. Inspect the engine for coolant leaking from hoses, draincocks, water manifold, expansion and pipe plugs, fittings, radiator core, exhaust heat shield, heat exchanger, air compressor and cylinder head gaskets; lubricating oil cooler, water pump seal, and OEM-mounted components that have coolant flow. Check the radiator pressure cap. Check the vent lines and the fill line for correct routing and for restriction. Check the coolant fill line for restrictions or obstructions. |
| Coolant Temperature Above Normal - Gradual Overheat | - Coolant level is below specification - Lubricating oil level is above or below specification - Load is excessive for engine horsepower rating - Coolant temperature gauge is malfunctioning - Radiator fins are damaged or obstructed with debris - Radiator cap is not correct, is malfunctioning, or has low-pressure rating - Cooling system hose is collapsed, restricted, or leaking | Inspect the engine and cooling system for external coolant leaks. Repair if necessary. Add coolant. Check the oil level. Add or drain oil, if necessary. Reduce the load on the engine. Test the temperature gauge. Replace the gauge if necessary. Inspect the radiator fins. Clean and repair the fins as necessary. Check the radiator pressure cap. Inspect the hoses. |
| Coolant Temperature Below Normal | - Engine is operating at low ambient temperature - Temperature gauge malfunction - Thermostat is not operating properly | Check the shutters and engine compartment air. Check or replace the temperature gauge. Check the thermostat for correct operation. |
| Engine Decelerates Slowly | Electronic control module system calibration is not correct | Compare the calibration in the electronic control system with the engine rating and the Control Parts |: List (CPL), Bulletin number 3379133 or 4021327. If necessary, calibrate the system. Refer to a Cummins Authorized Repair Facility. Check the throttle plate for sticking or hysteresis. |
| Engine Runs Rough or Misfires | Engine is misfiring | |
| Engine Starts But Will Not Keep Running | Manual fuel valve closed, Load is excessive for engine horsepower rating, Air intake system restriction, Exhaust system restriction is not within specification, Fuel supply pressure is below specification, Low or no fuel pressure at the mixer (secondary pressure) | Open manual fuel valve, Reduce the load on the engine, Inspect the air intake system for restriction, Replace the air filter, Check the exhaust system for restrictions, Contact a Cummins Authorized Repair Facility, Increase output pressure from the secondary fuel it the mixer (secondary regulator) |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan G8.3 Series troubleshooting guide (8 entries) →
Parts
33| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 05200007 | Fuel Filter, NG | Fuel filter | Amazon eBay | |
| 05600009 | Radiator Hoses | Hose | Amazon eBay | |
| 05e00014 | Air Cleaner Element, Paper Type | Air filter | Amazon eBay | |
| 08900217 | Low-Temperature Aftercooler (LTA) Water Pump | Pump | Amazon | |
| 08900239 | Low-Temperature Aftercooler (LTA) Water Pump | Pump | Amazon | |
| 08900241 | Coolant Filter | Filter | Amazon eBay | |
| 08900244 | Gasket, Low-Temperature Aftercooler (LTA) Water Pump | Gasket | Amazon | |
| 08900245 | Rubber Impeller Cap, Low-Temperature Aftercooler (LTA) Water Pump | Impeller | Amazon | |
| 13400046 | Spark Plug | Spark plug | Amazon | |
| 17900012 | Drive Belt, Cooling Fan | Belt | Amazon eBay | |
| 3163099 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3163196 | torque wrench adapter | Belt | Amazon eBay | |
| 3163292 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3164204 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3164486 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3164488 | Digital Multimeter Measure voltage on electrical equipment | Belt | Amazon eBay FridayParts $505.58 | |
| 3164491 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3164498 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3375049 | Oil Filter Wrench | 1 | Oil filter | Amazon eBay |
| 3376589 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3822524 | Use on v-belts ( 3/8 to 7/8) and v-ribbed belts with 5 ribs or less. | 1 | Belt | Amazon eBay |
| 3822525 | Use on v-beits larger than 7/8 in. and v-ribbed belts with 6 or more ribs. | 1 | Belt | Amazon eBay |
| 3823921 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3823983 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay | |
| 3824876 | Belt tension gauge, click type (v-belts‘and v-ribbed with 4 or 5 ribs) | Belt | Amazon eBay FridayParts $156.45 | |
| 9800wa | Sealing O-Ring, Air/Fuel Mixer | O ring | Amazon | |
| Q5e00009 | Radiator Hoses | Hose | Amazon eBay | |
| oi900sb | Cooling Fan Belt Tensioner | 1 | Belt | Amazon eBay |
| 0500007 | filter cover | Service part / kit | Amazon Amazon eBay | |
| 3376592 | Inch Pound Torque Wrench | 1 | Service part / kit | Amazon $380.14 eBay $174.95 KuduParts $359.00 |
| 3822735 | Plastic bead blasting media | 1 | Service part / kit | Amazon eBay |
| 3824510 | Cummins electronic cleaner | 1 | Service part / kit | Amazon eBay |
| oj900sb | Crankcase Breather Tube | 1 | Service part / kit | Amazon eBay |
Service, wear & replacement parts referenced for this model and its engine — confirm the exact part for your serial number. See the full parts catalog to search and cross-reference.
Available documents
Service manual — Cummins Diesel G8.3 Manual 2004 (Cummins/Onan)