Cummins/Onan — Disconnecting Set from Vehicle Systems
Repair & overhaul · generator set installation
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Before you start
- Gasoline vapor is extremely flammable; plug all fuel line openings.
Procedure
- Disconnect the vehicle negative (-) battery cable at the battery terminal.
- Disconnect the generator set negative (-) battery cable at the battery terminal.
- Disconnect the generator set positive (+) battery cable from the start solenoid.
- Disconnect the remote control wire plug from the generator set control.
- Disconnect the generator load wires at the vehicle electrical system junction box; tag wires.
- Loosen the conduit connector and pull the load wires and flexible conduit free.
- Disconnect the muffler from the exhaust manifold at the flange connection.
- Turn off the fuel shutoff valve and disconnect the fuel line at the fuel pump; plug the line.
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.