Cummins/Onan — Disconnecting Battery Before Electrical Work
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DQAD, Cummins/Onan DQAE, Cummins/Onan DQAF, Cummins/Onan QSM11 engine
Before you start
- Ignition of explosive battery gases can cause severe personal injury or death
- Disconnect negative cable first and reconnect last
Procedure
- Move Run/Off/Auto switch on control panel to OFF
- Press Emergency Stop button and wait at least 30 seconds
- Turn off or remove AC power from the battery charger
- Remove the negative (-) battery cable from the generator set starting battery
Full service-parts list: Cummins/Onan DQAD →, Cummins/Onan DQAE →, Cummins/Onan DQAF →
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.