Cummins/Onan RGA-IN1 — Generator Reassembly

Repair & overhaul

For the Cummins/Onan RGA-IN1, from the Cummins/Onan service manual.

Browse Cummins/Onan generators & specs →

Procedure

1. Slide exciter rotor over generator shaft and woodruff key. Install exciter lock nut and torque.
2. Connect generator field leads to F1+ and F2- terminals. Torque.
3. Press new end bearing onto rotor shaft.
4. Assemble rotor fan and drive disc to engine flywheel. Apply torque. Ensure chamfer on flywheel side.
5. Install air baffle.
6. Move stator assembly over rotor. Apply Molykote grease to end bearing mating surfaces.
7. Install end bell stud bolts through stator into generator adapter. Install end bell assembly with generator lead opening at top.
8. Torque end bell stud nuts to 20 ft-lbs (27 N•m).
9. Tap end bell with lead hammer to relieve stress. Torque end bell stud nuts.
10. Feed stator and control leads through opening in control box and saddle. Secure saddle to generator.
11. Connect all applicable control leads (F1, F2, battery charging, etc.) and verify secure.
12. Reconnect AC voltage regulator plug. Attach regulator with two bolts.
13. Install end bell cover.
14. Connect stator wires to load wires.
15. Connect negative (-) battery cable and test generator operation.

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.

More Cummins/Onan repair guides →