Cummins/Onan — Oil Draining Procedure
Maintenance · engine crankcase
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan NHEL
Before you start
- Hot oil can cause severe burns if spilled or splashed on skin. Keep fingers and hands clear when removing the oil drain plug and wear protective clothing.
- Contact with used oil can cause cancer or reproductive toxicity.
Parts for this job
- 122-0800 Oil filter Amazon eBay $31.23 FridayParts $39.99
Part numbers from the service-parts list for Cummins/Onan NHEL. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Run the engine until warm before draining the oil.
- Place a pan under the oil drain valve.
- Open the valve and allow oil to drain from the engine.
- Close the valve. Dispose of the old oil properly.
Tools required
- oil pan Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan NHEL →
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.