Cummins/Onan 6.5NH - 3CR / 6000 A — Generator Disassembly and Armature Removal
Repair & overhaul · AC generator
For the Cummins/Onan 6.5NH - 3CR / 6000 A, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NH engine
Before you start
- Be careful not to let the frame assembly rest or drag on the armature.
- Do not strike the commutator, collector rings or bearing.
Procedure
- Remove the band and end cover.
- Lift all brushes using alligator clips or sent the leads over the sides of the holder.
- Remove the generator through stud nuts.
- Hold both the end bell with its brush rig and the frame assembly and remove them as one assembly from the adapter.
- Turn the armature nut out to the end of the armature through stud.
- Pull outward with one hand under the armature and strike a sharp endwise blow on the nut to loosen the armature.
- Remove the armature and blower as an assembly.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.