The Cummins/Onan GTA855 engine line groups 4 variant designations. Parts and fitment are pooled here so a cross-reference found on one variant surfaces for the whole family.
| Part # | Description | Category |
|---|---|---|
| 3801468 | Set, Lower Engine Gasket | Gasket |
| 4024959 | Set, Upper Engine Gasket | Gasket |
| 3014404 | Nozzle, Piston Cooling | Injector |
| 214950 | Bearing, Connecting | Service part / kit |
| 3043928 | Camshaft | Service part / kit |
| 3081251 | Housing, Cam Follower | Service part / kit |
| 3801106 | Kit, Camshaft Bushing | Service part / kit |
| 3801260 | For cylinder 4-5 | Service part / kit |
| 3801826 | Kit, Cylinder Liner | Service part / kit |
| 4955662 | Kit, Engine Piston | Service part / kit |
| 3054948 | Ring, Liner Seal | Seal |
| 3411335 | Thermostat | Thermostat |
Parts cataloged across all variants of this engine family — verify the exact part fits your specific variant and serial number before ordering.