Cummins/Onan — Oil Filter Cartridge Replacement
Maintenance
From a Cummins/Onan owner's manual — check it applies to your exact model before use.
Browse Cummins/Onan generators & specs →
Before you start
- Overtightening the center bolt may distort the filter housing and cause oil leakage.
Procedure
- Place drip pan below the oil filter.
- Remove the center bolt, then remove the filter housing and element as a unit.
- Discard the dirty filter element and all gaskets; clean metal parts in solvent.
- Make sure the holes in the center bolt are free of sludge.
- Place a new gasket on the center bolt and insert it in the housing.
- Install the spring and retainer, then a new gasket and cartridge over the bolt.
- Tighten the center bolt to 20-25 foot-pounds torque.
- Check for leaks with the engine warmed up.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- 20-25 FridayParts $42.95 foot-pounds center bolt torque
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.