Cummins/Onan 3100 series — Circuit Board Removal/Replacement
Maintenance · PCC circuit board
For the Cummins/Onan 3100 series, from the Cummins/Onan service manual.
Applies to: Cummins/Onan GGKD
Before you start
- Electrostatic discharge will damage circuit boards.
- Accidental starting of the generator set while working on it can cause severe personal injury or death.
Procedure
- Wear a grounding wrist strap; attach clip to a non-painted surface of the control box.
- Turn off or remove AC power from the battery charger.
- Remove the negative (-) battery cable from the set starting battery.
- Disconnect harness connectors; remove and replace the circuit board.
- Recalibrate per Table 5-1 for the circuit board replaced.
Tools required
- Grounding wrist strap Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.