Cummins/Onan — Withdrawing Rotor From Generator
Repair & overhaul
From a Cummins/Onan service manual covering: C30 D6, C33 D5, C35 D6, C38 D5. 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
Before you start
- Rotor can be damaged if it rests on edges of winding slot.
Procedure
- Remove generator adaptor casting and bearing end plate.
- Cinch lifting strap on drive end of rotor.
- Lift bearing end with eye bolt and push toward drive end until half rotor core protrudes.
- Re-cinch strap around middle of rotor core; withdraw rotor free of stator.
- Guide rotor by hand to prevent contact with stator windings.
- Rest rotor in cradle on two pole faces, not drive discs, blower or exciter.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.