Cummins/Onan — Change Hydraulic Governor Oil
Maintenance
From a Cummins/Onan service manual covering: V12 Series, V6-140, V6-200, V6-VAL, V6-VIM, V8-185, V8-265, V8-350, V8-VALE, V8-VINE, VT12, VT8-430. Check it applies to your exact model before use.
Applies to: Cummins/Onan V12 Series
Parts for this job
Part numbers from the service-parts list for Cummins/Onan V12 Series. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Maintain oil level between marks on dipstick gauge.
- Change oil in governor at each E check.
- Use the same grade oil as used in the engine.
- When temperatures are extremely low, dilute lubricating oil with fuel oil to insure free flow.
Specs & values
- Governor oil changed at each E check
Full service-parts list: Cummins/Onan V12 Series →
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.