Cummins/Onan — Clean and Tighten Electric Connections
Maintenance · Battery and electrical connections
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
Before you start
- Prevent wire and lugs from touching each other or any metal except screw terminals.
Procedure
- Add water to battery cells to keep tops of plates covered.
- Remove corrosion from and around terminals, then coat with petroleum jelly.
- Keep connections clean and tight.
- Replace broken or worn wires and their terminals.
- Have battery tested periodically.
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.