Service parts for the G855 Series
Grouped by system, with how many of each the parts manual calls for.
Air intake
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.
Filters for the Cummins/Onan G855
1Engine-mounted filters the filter manufacturers list for this engine family. These come from the engine, not from this generator set’s own parts list, so confirm against your serial number before ordering.
Listed for this engine in only one kind of machine, so they may depend on how the engine was installed:
| System | Filter | Description | Cross-references | |
|---|---|---|---|---|
| Oil filter | P551670 | Lube Filter, Spin-On Full Flow | CUMMINS 298670, CUMMINS 299670, NAPA 1970, CARBOCOL 0026 | FridayParts $26.68 |
Maintenance & consumables
for the Cummins/Onan G855| Item | Spec | Capacity | Part # | Interval | |
|---|---|---|---|---|---|
| Air filter | filter element, NG | 05e00009 | Amazon eBay | ||
| Fuel filter | Install a new filter element and replace the filter cover using a new o-ring seal. | — | 1500 hr | ||
| Oil filter | 7/16 capscrews, 3/8 capscrews | — | 1500 hr | ||
| Battery | Disconnect the batteries, Slowly close the manual gas supply valve. | — | 1500 hr | ||
| Belt | Drive Belt, Cooling Fan | 17900012 | 1500 hr | Amazon eBay | |
| Coolant filter | — | 1500 hr | |||
| Oil | Lubricating Oil Level | — | 250 hr | ||
| Spark plug | Adjust the exhaust oxygen by turning the power valve on the carburetor. | — | 1500 hr |
Common questions
What engine is in the Cummins/Onan G855 Series?
The Cummins/Onan G855 Series is powered by the Cummins/Onan G855 engine.
Which air filter part number does the Cummins/Onan G855 Series take?
The Cummins/Onan G855 Series uses air filter part number 05e00009.
Troubleshooting
6Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Coolant Loss - External | Coolant level is above specification | Check the coolant level. Refer to Procedure 008-066 (Coolant Level) in Section 3. |
| Coolant Loss - External | External coolant leak | 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. |
| Coolant Loss - External | Radiator cap is not correct, is malfunctioning, or has low-pressure rating | Check the radiator pressure cap. Refer to the OEM service manual. |
| Coolant Loss - External | Fill line or vent lines are restricted, obstructed, or not routed correctly | Check the vent lines and the fill line for correct routing and for restriction. Refer to OEM specifications. |
| Coolant Loss - External | Coolant fill line is restricted or obstructed | Check the coolant fill line for restrictions or obstructions. Refer to the OEM installation instructions. |
| Coolant Loss - External | Engine is overheating | Refer to Coolant Temperature Above Normal symptom tree. |
Fault codes and symptom→remedy steps extracted from this model’s service/owner documentation; verify against the official manual before servicing. Full Cummins/Onan G855 Series troubleshooting guide (103 entries) →
Parts
34| Part # | Description | Qty | System | |
|---|---|---|---|---|
| 03100050 | Overhead Set | 1 | Gasket | Amazon eBay |
| 03100052 | Crosshead Adjusting Screw Lock Nut | 1 | Gasket | Amazon eBay |
| 03100058 | Overhead Set | Overhead set | Amazon eBay | |
| 03100063 | Rocker Lever Cover | Rocker lever cover | Amazon eBay | |
| 03100064 | Rocker Lever Cover | Rocker lever cover | Amazon eBay eBay | |
| 03100066 | Rocker Lever Cover | Gasket | Amazon eBay | |
| 03900242 | Coolant Filter | 1 | Filter | Amazon eBay |
| 03900243 | Coolant Filter | 1 | Filter | Amazon eBay |
| 03900244 | Coolant Filter | 1 | Filter | Amazon eBay |
| 03900245 | Coolant Filter | 1 | Filter | Amazon eBay |
| 05e00009 | filter element, NG | Air filter | Amazon eBay | |
| 06600154 | Air cleaner tube | 1 | Air cleaner | Amazon eBay |
| 081000714 | RESTORE™ CC2610 1 - Gallon | Fluid | Amazon eBay | |
| 08400269 | Spark Plug Wire | 1 | Spark plug | Amazon eBay |
| 08900235 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 08900236 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 089002397 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 08900246 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 08900247 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 09900238 | Low-Temperature Aftercooler (LTA) Water Pump | 1 | Pump | Amazon eBay |
| 10200031 | Fan, Cooling | Fan | Amazon eBay | |
| 17900012 | Drive Belt, Cooling Fan | Belt | Amazon eBay | |
| 03100067 | Rocker Lever Cover | 5 | Service part / kit | Amazon eBay |
| 03100069 | Rocker Lever Cover | Service part / kit | Amazon eBay | |
| 0500007 | filter cover | Service part / kit | Amazon Amazon eBay | |
| 06400190 | Air/fuel mixer power valve | 1 | Service part / kit | Amazon eBay |
| 08100072 | Belts | Service part / kit | Amazon eBay | |
| 08100073 | Catalytic Converters | Service part / kit | Amazon eBay | |
| 08100074 | Clutches | Service part / kit | Amazon eBay | |
| 08400190 | capscrew, 7/16 | Service part / kit | Amazon eBay | |
| 08600155 | capscrew, 3/8 | Service part / kit | Amazon eBay | |
| 08600156 | capscrew, 7/16 | Service part / kit | Amazon eBay | |
| 3376592 | Inch Pound Torque Wrench | 1 | Service part / kit | Amazon eBay $174.95 KuduParts $359.00 FridayParts $368.60 |
| 3822735 | Plastic bead blasting media | 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
This page was generated from the 2 manufacturer documents above by automated extraction; every figure shown is copied from one of them. How the data is compiled.