Cummins/Onan — Battery Maintenance
Maintenance · Starting battery
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan GGHG, Cummins/Onan GGHH, Ford V-10 6.8L engine
Before you start
- Do not smoke, or switch the trouble light ON or OFF near a battery.
- Using an insulated wrench, disconnect the negative (–) cable first and reconnect it last.
Parts for this job
Part numbers from the service-parts lists for Cummins/Onan GGHG, Cummins/Onan GGHH. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Keep the battery, and the battery area, clean and dry; ensure vent caps are securely screwed down or pushed home.
- To avoid contamination, only clean the battery when the vent plugs (if fitted) are in place.
- Keep the battery terminals and connections free from corrosion by lightly coating them with petroleum jelly.
- Make sure the battery(s) are secured to prevent movement and internal damage to plates.
- Check the condition of the starting batteries; refer to the Generator Set Maintenance table for the interval.
Full service-parts list: Cummins/Onan GGHG →, Cummins/Onan GGHH →
Source: Cummins/Onan operator's 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.