Cummins/Onan — P7 Bearing Replacement
Repair & overhaul · P7 generator end bearing
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFAA, Cummins/Onan DFAB, Cummins/Onan DFAC, Cummins/Onan DFBF, Cummins/Onan DFCB, Cummins/Onan DFCC, Cummins/Onan DFCE, Cummins/Onan DFE
Procedure
- Lift slightly on end of rotor shaft; install wooden shims to hold rotor on center.
- Install bearing onto rotor shaft per bearing kit instruction sheet.
- Install two threaded studs into end bearing cartridge.
- Install endbracket to stator frame; do not tighten securely yet.
- Insert and start bearing cartridge fasteners; remove alignment studs.
- Lift endbracket; remove wooden shims.
- Securely tighten endbracket fasteners.
- Tighten bearing cartridge fasteners to 4.5 ft-lbs (6 Nm).
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Bearing cartridge fasteners 4.5 ft-lbs (6 Nm)
Full service-parts list: Cummins/Onan DFBF →, Cummins/Onan DFCC →, Cummins/Onan DFCE →, Cummins/Onan DFE →
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.