Cummins/Onan — Lubricating oil system preparation
Installation · Engine oil system
From a Cummins/Onan owner's manual covering: CFP15E, CFP23E, CFP30E, CFP50, CFP5E, CFP60E, CFP7E, CFP9E, CFP9E HHP. Check it applies to your exact model before use.
Applies to: Cummins/Onan CFP23E
Before you start
- Do not use special break-in lubricating oils for new or rebuilt Cummins engines.
Parts for this job
- LF9325 Oil filter Amazon eBay $127.04 KuduParts $74.00 FridayParts $75.99
Part numbers from the service-parts list for Cummins/Onan CFP23E. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Check oil level using the dipstick before operating.
- Fill the oil fill port to the H mark on the dipstick.
- For models with oil level gauge: set oil to low, start engine, adjust gauge until alarm.
- Stop engine and fill to the H mark with lubricating oil.
Full service-parts list: Cummins/Onan CFP23E →
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.