hydraulics jumping on a 1955 ford 600

greaty

New User
I have a 1955 ford 600 and the lift arms will raise then drop fast I put seal and o ring kit in it but didn't help it anyone have a suggestion on what to try next
 
Cam follower pin is worn or you have a leak some place that allows the cylinder to leak down and then the linage see it going down and then makes it lift back up
 

Start by removing the round plate on the left side where the PTO lever is. Run it, move the quadrant a little and watch for a leak.
 
thanks for the tip I took the round plate off and watched for leaks while I had it running and the only place oil was coming out was in the front of the lift piston housing how much should be coming out of it and is there o rings in that part ? I couldn't get the back off of it is that the control valve?
 

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