Cummins/Onan — Servicing the Generator - Stator Removal
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKB
Before you start
- Disconnect the negative (-) battery cable before removing a panel or access door.
- The brushes can be damaged if the brush block is not removed before removing the end bell.
Procedure
- Disconnect the generator leads inside the AC outlet box and remove all enclosure panels.
- Remove the brush block.
- Remove the fan hub bolt and fan.
- Remove the end bell support bracket from the engine bracket and the end bell (4 bolts).
- Scribe a line across the adapter, stator laminations and end bell.
- Block the stator and remove the four generator through bolts.
- Pull the generator end bell straight out.
- Pull the stator assembly straight out, taking care not to damage rotor or stator windings.
- Block the rotor to support its hanging weight.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque stator through bolts and end bell bracket bolts to 8 lb-ft (11 N-m)
- Torque fan hub bolt to 45 lb-ft (61 N-m)
Full service-parts list: Cummins/Onan HDKB →
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.