Cummins/Onan — Clean Turbocharger Compressor Wheel and Diffuser
Maintenance
From a Cummins/Onan service manual covering: V12 Series, V6-140, V6-200, V6-VAL, V6-VIM, V8-185, V8-265, V8-350, V8-VALE, V8-VINE, VT12, VT8-430. Check it applies to your exact model before use.
Applies to: Cummins/Onan V12 Series
Before you start
- Never use a solvent that may attack aluminum.
- Do not rest weight of turbocharger on compressor wheel or on end of shaft.
Procedure
- Remove intake piping, air cleaner piping and support bracket from turbocharger.
- Loosen and remove capscrews, lockwashers and plain washers from plate; remove front plate.
- Use good carbon removing solvent and a nylon or hog bristle brush to clean compressor wheel and diffuser.
- If very dirty, remove turbocharger from engine.
- Immerse compressor wheel end in cleaning fluid to the diffuser plate face; allow to soak.
- Dry thoroughly with compressed air; reassemble front plate.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Clean at every E check
Full service-parts list: Cummins/Onan V12 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.