Cummins/Onan — Removing the Generator Set - Disconnections
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDZAA
Before you start
- Generator sets are heavy and can cause severe personal injury if dropped during removal. Use adequate lifting devices.
Procedure
- Disable the automatic generator starting feature and disconnect the battery cables from the battery (negative first), then disconnect the battery cables from the generator set.
- Disconnect the remote control wiring harness connector at the generator set.
- Disconnect the AC output leads at the generator set terminals.
- Disconnect the exhaust tailpipe from the muffler.
- Disconnect the supply and return fuel lines from the generator set.
Tools required
- Adequate lifting devices Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Secure the generator set to the vehicle structure with four (4) Grade 5 bolts of at least 3/8 inch diameter
Full service-parts list: Cummins/Onan HDZAA →
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.