Cummins/Onan — Change Engine By-pass Filter Element
Maintenance · Lubricating system
From a Cummins/Onan service manual covering: GNH-250, GNH-XI0, GNHC4, GNVH450, GV12, GV12 series, GV12-525. Check it applies to your exact model before use.
Applies to: Cummins/Onan GV12
Before you start
- Never use a by-pass filter in place of a full-flow filter.
Procedure
- Remove drain plug; drain oil.
- Remove clamping ring capscrew; lift off cover.
- Unscrew hold-down; lift out element(s); discard.
- Clean housing and hold-down in solvent.
- Inspect spring and seal; replace if damaged.
- Install new element(s) in housing.
- Replace cover O-ring; install cover and clamping ring.
- Add oil; loosen vent plug; start engine; close vent when oil reaches vent.
Full service-parts list: Cummins/Onan GV12 →
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.