Cummins/Onan — Connecting the Battery
Installation
From a Cummins/Onan service manual covering: C25 D6, C30 D6, C35 D6, C40 D6, C50 D6, C60 D6. Check it applies to your exact model before use.
Applies to: Cummins/Onan C25 D6, Cummins/Onan C30 D6, Cummins/Onan C35 D6, Cummins/Onan C40 D6, Cummins/Onan C50 D6, Cummins/Onan C60 D6, Cummins/Onan 4BT3.3 engine, Cummins/Onan 4BT3.3-G5 engine, Cummins/Onan 4BT3.3-G7 engine
Before you start
- Accidental or remote starting of the generator set can cause severe personal injury or death.
Procedure
- Press the generator set's O (Off) button and allow it to cool.
- Turn off and disconnect the battery charger from the AC source before disconnecting battery cables.
- Disconnect the negative (-) cable from the battery.
- Connect the positive battery terminal.
- Connect the negative battery terminal.
- Make sure black and red battery cable boots are in place.
Full service-parts list: Cummins/Onan C25 D6 →, Cummins/Onan C35 D6 →, Cummins/Onan C50 D6 →, Cummins/Onan C60 D6 →
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.