Cummins/Onan PCC 3100 — Cleaning Batteries
Maintenance · Starting batteries
For the Cummins/Onan PCC 3100, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan DFHA, Cummins/Onan DFHB, Cummins/Onan DFHC, Cummins/Onan DFHD, Cummins/Onan PCC 3100, Cummins/Onan QST30 engine
Before you start
- Electrolyte is a dilute sulfuric acid that is harmful to the skin and eyes. Wear goggles and protective rubber gloves and apron.
- Disconnect the negative ground cable before working on any part of the electrical system or the engine.
Procedure
- Keep the batteries clean by wiping them with a damp cloth whenever dirt appears excessive.
- If corrosion is present around the terminal connections, remove battery cables and wash terminals with a solution of 1/4 pound of baking soda added to 1 quart of water.
- Be sure the vent plugs are tight to prevent cleaning solution from entering the cells.
- After cleaning, flush the outside of the battery and surrounding areas with clean water.
- Keep the battery terminals clean and tight; coat terminals with a light application of petroleum jelly or non-conductive grease.
Specs & values
- Corrected specific gravity fully charged: 1.260
- Charge battery if reading is below 1.215
- Add four gravity points (0.004) for every ten degrees above 80°F (27°C)
Full service-parts list: Cummins/Onan DFHA →, Cummins/Onan DFHB →, Cummins/Onan DFHC →, Cummins/Onan DFHD →, Cummins/Onan PCC 3100 →
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.