Cummins/Onan — Removing the Generator Set
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB, Cummins/Onan HGJAD, Cummins/Onan HGJAE
Before you start
- Do not rest the alternator/engine assembly on its fan shroud.
- Avoid tipping the front (service side) down to prevent engine oil soaking the air filter.
Procedure
- Park the vehicle on a level surface.
- Put the transmission in PARK.
- Lock the brakes.
- Remove the ignition key; do not move the vehicle during this procedure.
- Lift using the four lift-hook slots with a lifting rig.
Tools required
- Lifting rig Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →, Cummins/Onan HGJAD →
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.