Cummins/Onan — Governor Installation
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
- The generator set may not stop on command if the fuel rack return spring is not assembled properly.
Procedure
- Installation is the reverse of removal.
- Use a long nosed plier to hook the governor spring to the actuator high-idle speed control lever.
- Apply liquid type sealant (Three Bond 1215 or equivalent) to both sides of the new gasket between the gear cover and governor base.
- Tighten the 4 base mounting screws according to Torque Specifications.
- Adjust the actuator speed control lever stop (beginning Spec B) before installing the rotor.
- Install the rotor using a new retainer ring (dished side down against the rotor).
- Install the stator and bearing carrier and tighten the 4 screws.
- Push the fuel rack return spring ring over the flat on the shaft and pry the leg into its slot.
- Readjust idle speed.
- Snap the cover onto the governor and secure with a wire tie.
- Reconnect the 2 leads from the engine harness.
Tools required
- long nosed plier Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Governor Actuator Bearing Carrier Mounting Screws torque 2.4-3.0 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.