Roosa Master Metering Stuck 3rd time

baxternick

New User
I just rebuilt my 59 901 diesel. The only part not new or rebuilt is my Roosa Master Pump. I keep having issues with the metering valve getting stuck in closed position after shut down. I can lightly tap the pump with a wrench with throttle open and the tractor will fire back up. This will be my 3rd tear down of the pump. The plungers and valve were stuck first time. I also had alot of crap in the screen. The second time the plungers were fine as was the screen.I can see no debris or residue on the metering valve or orifice that is stays in. I cleaned it the first time with some fuel and a lint free rag. Second time I used a 600 grit emery cloth coated in oil to try and polish it up without removing any of the surface of the valve. It really didn't seem to do much. The tractor started up fine, but once shut down it is still sticking. I pulled the pump off and have it sitting on the bench currently. It is clean inside. The valve just sticks. The slightest bit of effort and it pops open. Any suggestions? Can I polish the valve with something more aggressive? Thanks for any help guys.
 
Install a new metering valve. I had one once that the linkage that connects to the metering valve was off just a bit. It would catch on the side of the housing and stick in the off position when it was throttled back quickly. Sometimes stuck after being shut off. Never did really see the problem, just could make it happen on the test bench. After three on and offs on the tractor I swapped out the metering valve for the second time, and then the governor linkage and problem went away. Al
 
(quoted from post at 10:28:46 06/23/18) Install a new metering valve. I had one once that the linkage that connects to the metering valve was off just a bit. It would catch on the side of the housing and stick in the off position when it was throttled back quickly. Sometimes stuck after being shut off. Never did really see the problem, just could make it happen on the test bench. After three on and offs on the tractor I swapped out the metering valve for the second time, and then the governor linkage and problem went away. Al

Where do I find a new valve? I am looking all over online with zero luck.
 
(quoted from post at 12:04:05 06/23/18) Give a shout out to Dieseltech.

He currently has PM turned off. So I can't directly ask him. Anyone else have a suggestion to clean the metering valve so it has smooth operation?
 

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