Cummins/Onan 6.5NH - 3CR / 6000 A — Governor Cup Removal and Installation
Repair & overhaul
For the Cummins/Onan 6.5NH - 3CR / 6000 A, from the Cummins/Onan service manual.
Applies to: Cummins/Onan NH engine
Procedure
- With the gear cover removed, remove the snap ring from the camshaft center pin.
- Catch the flyballs while sliding the cup off.
- Replace any flyball that is grooved or has a flat spot; replace a worn ball spacer.
- The cup must spin freely on the center pin without excessive looseness or wobble; replace a grooved or rough cup.
- When installing, tilt the engine so the gear is up, put the flyballs in place and install the cup and snap ring on the center pin.
Tools required
- Snap ring pliers Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Camshaft center pin extends 3/4 inch; governor cup travel 7/32 inch
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.