Cummins/Onan — Filling the Battery with Electrolyte
Installation
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DFEJ, Cummins/Onan DFEK, Cummins/Onan QSX15-G9 engine
Before you start
- Wear acid-proof protective apron, goggles, rubber gloves and boots.
- Never add undiluted sulfuric acid to a battery.
Procedure
- Fill each cell of the battery with dilute sulphuric acid (electrolyte) of the correct specific gravity according to the levels on the battery label.
- Filling must be completed in one step.
- Allow the battery to soak for ten to fifteen minutes; restore the electrolyte level if it has fallen.
- After filling, place the battery on a commissioning charge within one hour before any load is placed on the battery.
Specs & values
- Correct specific gravity per battery label
Full service-parts list: Cummins/Onan DFEJ →, Cummins/Onan DFEK →
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.