Cummins/Onan — Replacing AC Terminal Block
Repair & overhaul
From a Cummins/Onan owner's manual covering: 1.5HJBAA, 2.0HJBAA, 2.5HJBAA, 3.0HJBAA. Check it applies to your exact model before use.
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Procedure
- Turn OFF the AC circuit breaker supplying power to the Inverter-Charger.
- Disconnect the batteries from the Inverter-Charger.
- Remove the AC terminal block cover and disconnect all wires; note the terminal block label and the marking on each lead end.
- Remove the two terminal block mounting screws (T20).
- Connect and tighten all leads to the new terminal block and mount it with the two mounting screws.
- Torque all terminals to 5 lb-in.
- Complete the installation in reverse order of removal and test for proper operation.
Tools required
- torx T20 bit Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Torque all terminals to 5 lb-in
Source: Cummins/Onan owner'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.