Cummins/Onan PX12000 / RGV13100 — Rear Cover Assembly
Repair & overhaul
For the Cummins/Onan PX12000 / RGV13100, from the Cummins/Onan service manual.
Applies to: Cummins/Onan PX12000, Yamaha EH65D engine, Cummins/Onan EH65D engine
Before you start
- There are two kinds of brush holders; if a brush is installed oblique to the slip ring, the brush holder or brush can break.
Procedure
- Put the rear cover with stator and stator cover over the rotor; pull wires out from the rear cover.
- Attach the bushing over the lead wire drawn out from the rear cover; press the smaller end into the rear cover window.
- Tap the rear cover evenly with a plastic hammer to press the rotor bearing into the rear cover.
- Fix the rear cover with four bolts, spring washers, and washers.
- Install the brush holders in the rear cover; pass mounting screws through the brush holders.
- Push the brush holders so the brushes are perpendicular to the slip rings, and tighten the screws.
- Attach the connectors to the brush holders; connect the green wire to the stator end and the brown wire to the bearing end.
- Install the brush cover.
- RGV13100T only: attach the end cover to the rear cover.
- Tighten the nuts over the mount rubber bolts to fix.
- Fasten the earth cable to the unpainted bolt hole on the frame.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Brush holder resistance across brushes and terminals: 5 to 7.5 ohms
- Tightening torque 11.8-13.7 N m / 120-140 FridayParts $102.50 kg cm / 8.7-10.1 ft lbs
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.