Cummins/Onan — Valves - Adjust
Adjustments
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Disconnect battery cables, engine wiring harness, fuel lines, exhaust hose, coolant hoses
- Drain and refill engine fluids
- Remove soundshield
- Remove glowplugs
- Remove valve cover
- Adjust valve lash
- Test run unit
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.