Cummins/Onan Onan P4500i Inverter / P4500 — Battery Replacement
Maintenance
For the Cummins/Onan Onan P4500i Inverter / P4500, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan P4500
Before you start
- Battery contains sulfuric acid (electrolyte) which is highly corrosive and poisonous.
- Dispose of the used battery properly.
Parts for this job
- A058U961 Battery Amazon eBay $44.99
Part numbers from the service-parts list for Cummins/Onan P4500. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove the battery access cover.
- Remove the quick-connect plug and the battery strap, then remove the battery from the unit.
- Disconnect the quick-disconnect cable leads from the battery.
- Connect the white (-) quick-connect cable to the replacement battery negative terminal; slide the rubber boot over the connection.
- Connect the red (+) quick-connect cable to the positive terminal; slide the rubber boot over the connection.
- Lift the battery strap and install the battery; thread the strap under the quick-connect cables and secure to the mounting base.
- Connect the quick-connect plug and install the battery access cover.
Full service-parts list: Cummins/Onan P4500 →
Source: Cummins/Onan operator's 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.