Looseness of the Unloader valve is not an issue as you say that dead ending the auxiliary valve has no effect on the slow lift!!
I think the issue lies elsewhere but ideally need the pressure test!!
Dead ending the aux valve during lift, rules out all problems in the Unloader and flow control valve assy if there is no change to rate of lift ??
While you have unit on the bench remove the union and check the flow control piston and its spring?? This piston (only) is matched to the valve body and could give slow lift, but if it was responsible for your issue the lift would speed up when the aux valve was dead ended!!
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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