Posted by CJ Johnson on October 19, 2012 at 17:12:29 from (174.253.145.184):
My fast hitch hydraulic circuit has the original draft sensing valve removed and a conventional valve has been put back in it's place. The hydraulics load up bad when the engine is running, drag down the RPM's and blow the relief valve open (I assume). I have a short hydraulic hose connected to the inlet and outlet valve with the longest remote valve handle and it is pulled back with a rubber bungee. It helps some but there is still pressure in the system. If I raise or lower the hitch it goes away until it reaches the up or down limit of the hitch. It does not go away if I center the remote lever for the hitch. I bought this tractor with a bad TA and hydraulic pump. Both have been fixed and there is fresh hy-tran in the tractor but I'm sure there may be some garbage in the hydraulic system. Any ideas what's wrong? What I can't figure out is that if the large (or short) handle is held back all the pressure should be relieved on the system shouldn't it? Or is there a priority flow valve that still sends pressure to the hitch? If so, centering the lever on the hitch should take pressure off of the system I would think.
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