Cummins/Onan — Air Filter Service
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan GGHG, Cummins/Onan GGHH, Ford WSG-1068 engine
Before you start
- Filters should be handled with care; install recommended replacement part if damaged.
- Do not clean filter housing while still installed.
Procedure
- Remove wing nut in center of filter cover.
- Remove cover and filter.
- Tap filter on a flat surface to remove dirt.
- Place a light source inside filter and inspect for air passage.
- If necessary, apply low pressure air (30 psi) to inside of filter to remove dirt.
- Inspect interior housing; vacuum clean if dirty or remove housing and wipe clean.
Tools required
- Low pressure air source (30 psi) Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Clean every 100 hours; replace after 500 hours
Full service-parts list: Cummins/Onan GGHG →, Cummins/Onan GGHH →
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.