Cummins/Onan — Replace oil filter
Maintenance
From a Cummins/Onan service manual covering: 10MJC, 15MJC, 3MJA, 4MJA, 5MJB, 705MJB. Check it applies to your exact model before use.
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Procedure
- Remove filter by turning counterclockwise with filter wrench.
- Oil new gasket.
- Install new filter hand tight plus 1/4 to 1/2 turn.
- Check for leaks.
Tools required
- filter wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Hand tight plus 1/4 to 1/2 turn
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.