Cummins/Onan — Battery Cable Connections at the Generator Set
Installation · battery cables
From a Cummins/Onan service manual covering: 5.5 HGJAA, 5.5 HGJAB, 6.5 HGJAA, 6.5 HGJAB, 7.0 HGJAA, 7.0 HGJAB. Check it applies to your exact model before use.
Applies to: Cummins/Onan HGJAA, Cummins/Onan HGJAB
Before you start
- Routing battery cables with fuel lines can lead to fire and severe personal injury or death. Keep battery cables away from fuel lines.
- Arcing can ignite the explosive hydrogen gas given off by the battery.
Procedure
- Terminate the battery cables with ring terminals sized for 5/16 inch screws and connect them to the generator set.
- Secure the insulating boot on the positive (+) terminal and tie it to the battery cable with the tie-wrap supplied with the manuals.
- Torque the positive (+) cable terminal to 6 Nm (4.5 ft-lbs).
- Torque the negative (–) cable terminal to 11 Nm (8 ft-lbs).
- When required, connect the grounding screw to the vehicle frame with No. 8 AWG or larger stranded cable and a ring terminal for a 3/8 inch screw; torque to 11 Nm (8 ft-lbs).
Specs & values
- Positive (+) cable terminal: 6 Nm (4.5 ft-lbs)
- Negative (–) cable terminal: 11 Nm (8 ft-lbs)
- Grounding screw: 11 Nm (8 ft-lbs)
- Cable size per Battery Cable Sizes table (2 AWG for 0-13.7 m / 0-45 ft)
Full service-parts list: Cummins/Onan HGJAA →, Cummins/Onan HGJAB →
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.