Cummins/Onan — Preparing Engine for Service
Repair & overhaul · Engine/generator assembly
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan Performer P224 engine
Procedure
- Remove the rear panel of the housing.
- Remove B+ battery cable from starter and B- battery cable from engine.
- Disconnect plugs P2 and P4 of the control harness.
- Disconnect the five leads of the governor controller board.
- Disconnect the B+ lead from the voltage regulator.
- Disconnect the flexible fuel supply line from the carburetor (NG/LP vapor) or LPG converter (LP liquid).
- Remove the generator bond strap from the skid base.
- Remove the two engine vibration isolator center-bolts.
- Remove the four screws that secure the alternator support bracket to the skid base.
- Slowly turn the engine/generator counter-clockwise, avoiding tension on the alternator harness wires.
- Reassembly is the reverse. Torque isolator center-bolts to 30-35 lb-ft and bracket screws to 25-35 lb-ft.
Specs & values
- Vibration isolator center-bolts 30-35 FridayParts $14.81 KuduParts $233.00 lb-ft (41-47 N-m)
- Alternator support bracket screws 25-35 FridayParts $25.27 lb-ft (34-47 N-m)
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.