Cummins/Onan — Engine Removal
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAH, Cummins/Onan HDKAJ, Cummins/Onan HDKAK
Before you start
- Using only one lifting eye will cause the unit to rotate and drop, causing severe equipment damage and possible personal injury.
Procedure
- Disconnect the negative (-) battery cable.
- Remove the front, top, back and right end housing panels.
- Remove the muffler.
- Remove the oil dipstick and disconnect the oil fill tube from the recovery tank.
- Drain the coolant system, disconnect hoses, remove radiator and inner bulkhead.
- Disconnect the air inlet hose at the resonator.
- Disconnect the PMA stator leads.
- Disconnect the engine harness from the control-inverter assembly and fuel pump.
- Disconnect the skid-base ground strap from the flywheel housing.
- Disconnect the battery harness from the engine.
- Attach the hoist at both the flywheel housing lift and the front engine lifting eye.
- Remove the 3 isolator-mount center bolts and lift the engine/PMA assembly away.
Tools required
- hoist Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Vibration Isolator Center Bolt torque 58-72 Nm
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAH →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
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.