Cummins/Onan RBAA — Installation is the reverse of removal.

For the Cummins/Onan RBAA.

Applies to: Cummins Onan Rbaa

Procedure

1. Remove the fan and hydraulic motor (Fig-
2. Remove the drive bearing retention ring so that
3. The generator wrapper has two holes on oppo-
4. Scribe lines before separating the endbells
5. Disconnect the field leads from the exciter end-
6. Remove the four nuts and washers on the sta-
7. Remove the exciter endbell bracket from the
8. Tap the exciter endbell free and lift it away.
9. Lift the stator straight up free of endbell and ro-
10. Remove the four through bolts.
11. Remove the air baffle.
12. Thread an M10 eyebolt into the end of the rotor
13. Use a puller to remove a defective exciter rotor
14. Press a new exciter rotor or bearing on up to its
15. To reduce the likelihood of damaging the wind-
16. Make sure the lines scribed on the endbells and
17. Torque the four exciter stator screws to 8 lb-ft
18. Torque the four air baffle screws to 8 lb-ft
19. Torque the four motor adapter hub screws to
20. Torque the four through bolt nuts to 31 lb-ft
21. Torque the three fan hub screws to to 8 lb-ft
22. Torque the center fan hub screw to to 41 lb-ft
23. Wipe the bearing bore in the exciter endbell
24. Wipe the bearing bore in the adapter endbell
25. Disconnect all loads from the generator set.
26. Remove the side access cover and disconnect
27. Prepare to connect 12 volt battery positive (+)
28. Recheck polarity (the test will be inconclusive
29. Connect battery negative (–) to the F2 lead and
30. The generator circuitry is probably okay if rated
31. If the voltages are not approximately the same,
32. 89 to 1.71
33. 6 to 11.8
34. 638 to 0.522
35. 043 to 0.039

Source: manual:943-0502 Onan RBAA Hydraulic Genset Service manual (02-2005).pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.