Cummins/Onan NTA855 — Battery Connections (Prestart)
Operation · Starting batteries
For the Cummins/Onan NTA855, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DFAB, Cummins/Onan DFAC, Cummins/Onan DFBF, Cummins/Onan DFCB, Cummins/Onan DFCC, Cummins/Onan DFCE, Cummins/Onan NTA855, Cummins/Onan LTA10 engine, Cummins/Onan NT855 engine, Cummins/Onan NTA855 engine
Before you start
- Accidental starting of the generator set can cause severe personal injury or death.
- Always connect negative (-) battery cable last to prevent arcing.
Procedure
- Set the Run/Off/Auto switch on the control panel to the Off position before connecting the battery cables.
- Connect the positive battery cable before connecting the negative battery cable to prevent arcing.
- Service the batteries as necessary.
- If an automatic transfer switch is installed without a built-in charge circuit, connect a separate battery charger.
Specs & values
- 24 Volts DC starting system
Full service-parts list: Cummins/Onan DFBF →, Cummins/Onan DFCC →, Cummins/Onan DFCE →
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.