Cummins/Onan 3100 series — Generator Reassembly

Repair & overhaul

For the Cummins/Onan 3100 series, from the Cummins/Onan service manual.

Applies to: Cummins/Onan GGKD

Procedure

1. Apply force to the inner race of the rotor bearing when pressing it onto the shaft.
2. Torque drive disc-to-rotor bolts to 190 ft-lbs (257 Nm).
3. Torque drive disc-to-flywheel bolts to 50 ft-lbs (67 Nm).
4. Torque exciter stator mounting screws to 7 ft-lbs (10 Nm).
5. Torque generator end plate mounting bolts to 25 ft-lbs (34 Nm).
6. Ensure the rubber O-ring is in place in the bearing bore.
7. Torque generator mounting bracket bolts to 65 ft-lbs (88 Nm) if M12 or 35 ft-lbs (47 Nm) if M10.
8. Torque generator-to-adaptor bolts to 40 ft-lbs (55 Nm).
9. Torque adaptor-to-engine bolts to 35 ft-lbs (48 Nm).
10. Reconnect the generator as required.

Full service-parts list: Cummins/Onan GGKD →

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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