Cummins/Onan 50.0 DDB 15R / 50.0 DDB 15R J 1 Q — Dilute Battery Electrolyte for Hot Locations
Maintenance
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 attempt to pour off electrolyte; avoid skin or clothing contact.
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
- Fully charge the battery.
- With the battery still on charge, draw off the electrolyte above the plates in each cell using a hydrometer or filler bulb.
- Refill each cell with distilled water to normal level.
- Continue charging for 1 hour at 4 to 6 amperes.
- Test each cell; if specific gravity is still above 1.225, repeat steps 2, 3 and 4 until reduced to 1.225.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Dilute electrolyte from 1.260 to 1.225 specific gravity when ambient is above 90F (32.2C)
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.