Cummins/Onan P4500iDF — Engine Oil Change
Maintenance
For the Cummins/Onan P4500iDF, from the Cummins/Onan owner's manual.
Applies to: Cummins/Onan P4500iDF
Before you start
- Accidental start-up. Remove the spark plug boot and battery quick-connect plug when working on the generator.
Parts for this job
Part numbers from the service-parts list for Cummins/Onan P4500iDF. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Place generator on a level surface and allow engine to cool several minutes.
- Remove engine service cover; disconnect the spark plug wire.
- Remove the oil access cover.
- Clean around and remove the oil dipstick; wipe clean.
- Remove the rubber plug under the oil drain bolt; place an oil pan under the drain hole.
- Using a 10mm wrench, remove the oil drain bolt and allow oil to drain.
- Install the oil drain plug and tighten securely; install the rubber plug.
- Slowly pour oil into the oil fill until level is between L and H marks.
- Replace the dipstick and hand-tighten.
- Connect the spark plug wire and install the engine service cover.
Tools required
- 10mm wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Maximum oil capacity: 0.63 US qt (0.60 L)
Full service-parts list: Cummins/Onan P4500iDF →
Source: Cummins/Onan owner'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.