Cummins/Onan — Cleaning the Engine Oil Strainer
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDZAA
Before you start
- Wear safety glasses when using compressed air to clean the oil strainer.
Procedure
- Remove the maintenance access door.
- Loosen the center screw of the strainer about five turns and withdraw the strainer from the engine block.
- Use compressed air to clean the strainer, blowing debris from inside out.
- Replace the O-rings or strainer if damaged.
- Lubricate the O-rings with clean oil and insert the strainer until it stops.
- Check for spring tension against the strainer and tighten the center screw.
- Secure the front access door.
Tools required
- Compressed air Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan HDZAA →
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.