Cummins/Onan — Engine - Replace
Repair & overhaul
From a Cummins/Onan service manual covering: C30 D6, C33 D5, C35 D6, C38 D5, X3.3 Engine. Check it applies to your exact model before use.
Applies to: Cummins/Onan C30 D6, Cummins/Onan C33 D5, Cummins/Onan C35 D6, Cummins/Onan C38 D5
Procedure
- Disconnect and connect battery cables
- Disconnect engine harness, fuel lines, exhaust hose, coolant hose
- Drain and refill engine fluids
- Remove and install enclosure and starter
- Remove and install generator control assembly and generator assembly
- Transfer flywheel, flywheel housing, intake and exhaust manifolds
- Transfer starter, switches, senders, engine mounts
- Transfer fuel filter assembly, lines and fuel pump; test run unit
Full service-parts list: Cummins/Onan C35 D6 →
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.