Cummins/Onan — Resetting Governor Arm
Adjustments
From a Cummins/Onan service manual covering: 5.5 HGJAA, 5.5 HGJAB, 5.5 HGJAC, 5.5 HGJAD, 5.5 HGJAE, 5.5 HGJAF, 6.5 HGJAA, 6.5 HGJAB, 6.5 HGJAC, 6.5 HGJAE, 6.5 HGJAF, 7.0 HGJAA…. Check it applies to your exact model before use.
Applies to: Cummins/Onan 5.5 HGJAD, Cummins/Onan 5.5 HGJAE, Cummins/Onan 6.5 HGJAE
Procedure
- Loosen the governor shaft nut by turning it clockwise and remove the arm.
- Use a battery terminal puller to break the taper fit of the shaft in the arm hub.
- Reattach arm and hub making sure the pins and holes engage; thread the shaft nut on counterclockwise.
- Check free rotation of the arm and let the governor spring take up all play; linkage must push throttle against the wide open throttle stop.
- Torque the shaft nut to 8 lb-ft (11 N-m) counterclockwise.
- Push the governor arm down and check for binding or interference.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Shaft nut 8 lb-ft (11 N-m), counterclockwise
Full service-parts list: Cummins/Onan 5.5 HGJAD →, Cummins/Onan 5.5 HGJAE →, Cummins/Onan 6.5 HGJAE →
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.