Cummins/Onan — Valves - Adjust (SRT 03-603)
Adjustments · Valve lash
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Disconnect and connect battery cables
- Remove glowplugs
- Remove valve cover
- Adjust valve lash
- Test run unit
Specs & values
- Standard repair time 1.7 hrs
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.