Cummins/Onan — LPG Fuel Filter Cleaning
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan NHEL
Before you start
- LPG is flammable and explosive.
Parts for this job
- 149-2279 Fuel filter Amazon eBay $26.93 KuduParts $31.00 FridayParts $33.04
Part numbers from the service-parts list for Cummins/Onan NHEL. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Purge LPG system before disassembly.
- Remove four capscrews and lock washers holding bowl.
- Separate bowl from body and discard O-ring.
- Remove nut and washer from center stud.
- Pull out filter element.
- Wash element in kerosene and blow dry with 30 psi air.
- Wipe magnet clean.
- Install clean element with new gaskets and new O-ring.
Tools required
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 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.