Re: 3-Pt Shudder
Alt5600.. it's doubtfull it is cavitation.. that would happen on the pump side.. not the pressurized cyl side. I think Jinman hit the nail on the head.
The poster is probably seieng a system leakdown and then system regeneration in a position control scheme. Likely sources are relief or check valve, internal gaskets and oings, including the lift piston/cyl.
Ford/NH used a unloading type valve that will do this very thing.. their previous control valve setup pre 53 did the same as well.. it's quite common.
soundguy
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