DX33 governor issue

[whitetailbuck]

Need help with my tractor had been sitting for years and I have cleaned tank and lines and new filter . I can get it to start but then it revs way high and won't slow down throttle moves but not responding to it have to shut off fuel to stop it. Any ideas are welcome.

 

[Harry in Ky]

If it's been sitting for years, could be the rack in the injection pump is stuck and not responding to controls. If you remove the fuel shut off solenoid, you should be able to move the rack(provided it WILL move) through the exposed opening with just a little effort. Under normal conditions the spring loaded pin in the solenoid will push the rack far enough to stop fuel delivery when no voltage is applied. If you can't move the rack manually with an equal amount of effort, you may need to remove the pump unit and repair it as needed.

 

[whitetailbuck]

I appreciate it but I have tried that and it does move. I have even removed pump and all moves good. As my more info?

 

[Harry in Ky]

So have you tried moving the rack while running, just reaching in and pushing it forward toward shut off to see if that has any effect on RPM? Does it start and run away with the solenoid installed and no power applied? If the answer is yes in either case, then the rack movement is having no effect and the pump needs to be torn down for more evaluation.

 

[whitetailbuck]

Harry I tried running without solenoid in place. Would not start till I pushed rack in some then started and ran at idle for 10 second then it moves on its owns to rap out again. Must be an issue with govenor. ??

 

[Harry in Ky]

Seems to me the solenoid(with no power applied) pushes the rack forward to stop fuel delivery. When running, all the governor does is move the rack in that direction to lower RPM. If you're pushing it forward manually and it's still trying to run away, then I don't see the governor being the issue. It seems the rack's movement, for whatever reason, is simply not controlling the rotation of the plunger units as I think it should. The fact that with the solenoid removed, you say you have to push the rack to get it started makes no sense. I still think it's time to take the pump to a professional, explain what it's doing, and see what they tell you.