Cummins/Onan 6CT 8.3 — General Rebuild Instructions
Repair & overhaul · Engine
For the Cummins/Onan 6CT 8.3, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 6CT 8.3, Cummins/Onan C Series, Cummins/Onan 6CT8.3 engine
Before you start
- Cleanliness is an important consideration during repair of a diesel engine. Built-in contamination can reduce the life of an engine.
Procedure
- Observe all safety precautions noted in the procedures.
- Provide a clean environment and follow the cleaning instructions specified in the procedures.
- Perform the inspections specified in the procedures.
- Replace worn and damaged parts as necessary for a successful rebuild.
- Use genuine Cummins new or ReCon® service parts and assemblies.
- Follow the specified disassembly and assembly procedures to avoid damaging parts and ensure proper assembly and tightening.
Full service-parts list: Cummins/Onan 6CT 8.3 →, Cummins/Onan C Series →
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.