Cummins/Onan LS-15M — Bearing Replacement (P7)

Repair & overhaul · Generator end bearing

For the Cummins/Onan LS-15M, from the Cummins/Onan service manual.

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

1. Lift slightly on end of rotor shaft and install wooden shims to hold rotor on center with stator.
2. Install bearing onto rotor shaft. Refer to bearing kit instruction sheet.
3. Install two threaded studs into end bearing cartridge to aid subsequent procedures.
4. Install endbracket to the stator frame using the proper screws and lock washers, but do not tighten securely as yet.
5. Insert and start the threads of the bearing cartridge fasteners, and remove threaded alignment studs.
6. Lift slightly on endbracket and remove wooden shims holding rotor on center with stator.
7. Securely tighten the endbracket fasteners.
8. Tighten the bearing cartridge fasteners to 4.5 ft-lbs. (6 Nm) torque.
9. Install the PMG assembly.

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.

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