Cummins/Onan 50.0 DDB 15R / 50.0 DDB 15R J 1 Q — Battery Servicing
Maintenance · Starting batteries
For the Cummins/Onan 50.0 DDB 15R / 50.0 DDB 15R J 1 Q, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 50.0 DDB 15R, John Deere 6329D engine
Before you start
- Do not smoke while servicing batteries; lead acid batteries give off explosive gases while being charged.
Parts for this job
Part numbers from the service-parts lists for Cummins/Onan 50.0 DDB 15R, John Deere 6329D engine. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Check the condition of the starting batteries at least every two weeks.
- See that connections are clean and tight; coat with non-conductive grease.
- Keep electrolyte at the proper level above the plates by adding distilled water.
- Check specific gravity; recharge if below 1.260.
Specs & values
- Specific gravity 1.260 at 80F (26.7C)
Full service-parts list: Cummins/Onan 50.0 DDB 15R →, John Deere 6329D engine →
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.