Cummins/Onan — Crankcase Breather Cleaning
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA
Before you start
- Many cleaning solvents present a hazard of severe personal injury or death.
Procedure
- Remove the cap nuts and gaskets from the top of the cylinder head cover.
- Carefully remove the cover; avoid damaging the gasket.
- Remove two machine screws securing the breather element, plates and shield.
- Clean the element in a suitable solvent.
- Dry the element, then saturate with engine oil before replacing.
- Clean other breather components in solvent if necessary.
Tools required
- Suitable solvent Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Saturate element with engine oil before replacing
Full service-parts list: Cummins/Onan HDKA →
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.