kingslandkid
Member
Hi Folks, had a first time problem the other day with a 3000 diesel with the CAV DPA pump running past full throttle even with the lever in the slow position. After taking the top tank cover off the pump to check the governor assembly. Nothing looked gummed up or misaligned so I removed the cover on the side to drain down the fuel and to look at the fly weights. That's when I found the fly weight holder was rotating on the shaft. Having had several of these pumps apart before I knew that the socket head cap screw holding the hub to the shaft might be loose so I drained the coolant and removed the radiator hose so I could remove the timing gear cover to check it. Sure enough my hunch was correct as the screw was not at all tight. I retightened it to around 30 foot pounds and reassembled it and now it works fine. My question to the members is: has anyone experienced this same problem and is just tightening the screw the right fix. I'm not sure why the spring under the head of the screw is there. Does it provide some sort of lock on the small washer to ensure a tight fit and how does it stay tight. Is lock tight required or just torqueing to 25 - 30 foot pounds do the job. I hope It doesn't come untightened again as a runaway engine is a scary situation.
This post was edited by kingslandkid on 11/25/2021 at 10:42 am.
This post was edited by kingslandkid on 11/25/2021 at 10:42 am.
