Cummins/Onan — Replacing Fan Assembly
Repair & overhaul · Cooling fan assembly
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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Before you start
- Only trained and experienced persons may perform Inverter-Charger service.
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 from the AC terminal block.
- Remove all plug-in connectors to external circuits.
- Remove the Inverter-Charger.
- Use a torx T20 bit to remove the 12 screws that attach the cover to the base.
- Remove the cover by sliding it straight back 3/4 inch and then lifting it straight up.
- Disconnect the 3-pin fan connector.
- Remove fan mounting hardware: 2 screws (T20) to control board and 2 nuts (10 mm) to base; withdraw the assembly.
- Install the new fan assembly in reverse order; reconnect the 3-pin connector and ground wire.
- Conduct a Fan Function Test.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
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.