Cummins/Onan PCC 3100 — Generator Reassembly
Repair & overhaul
For the Cummins/Onan PCC 3100, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCC, Cummins/Onan DGDA, Cummins/Onan DGDB, Cummins/Onan DGDK, Cummins/Onan DGEA, Cummins/Onan DGFA, Cummins/Onan DGFC, Cummins/Onan PCC 3100
Procedure
- Apply force to the inner race of the rotor bearing when pressing it onto the shaft; be sure to secure the retaining clip.
- Torque the drive disc-to-rotor bolts to 190 ft-lbs (257 Nm).
- Torque the drive disc-to-flywheel bolts to 50 ft-lbs (67 Nm).
- Torque the exciter stator mounting screws to 7 ft-lbs (10 Nm).
- Torque the generator end plate mounting bolts to 25 ft-lbs (34 Nm).
- Make sure the rubber O-ring is in place in the bearing bore in the generator endplate.
- Torque the generator mounting bracket bolts to 65 ft-lbs (88 Nm) if M12 or 35 ft-lbs (47 Nm) if M10.
- Torque the generator-to-adaptor bolts to 40 ft-lbs (55 Nm).
- Torque the adaptor-to-engine bolts to 35 ft-lbs (48 Nm).
- Reconnect the generator as required.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Drive disc-to-rotor bolts 190 ft-lbs (257 Nm)
- Drive disc-to-flywheel bolts 50 ft-lbs (67 Nm)
- Exciter stator mounting screws 7 ft-lbs (10 Nm)
- End plate mounting bolts 25 ft-lbs (34 Nm)
- Generator-to-adaptor bolts 40 ft-lbs (55 Nm)
- Adaptor-to-engine bolts 35 ft-lbs (48 Nm)
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGCC →, Cummins/Onan DGDA →, Cummins/Onan DGDB →, Cummins/Onan DGEA →, Cummins/Onan DGFA →, Cummins/Onan DGFC →, Cummins/Onan PCC 3100 →
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.