560 Hydraulics

I have a 560 diesel with 2 point. For some time the hitch would work sometimes and sometimes not, now it will not work at all. There is no sqeelling when the other Hydraulic levers are activated and the power steering works. Is the main pump shot?
 
Well you have a problem, Hytran good color, should be changed yearly according to Mrs McCormick boys, & filter, the hyd pumps are tandem which means drive input same, so that is ok, 2 pumps in systems, 1 for PS only, 1 for main supply, feeds hitch and remote couplers, would guess you have a regulator & safety valve problem in the valve stack ahead of your knees below steering wheel.
 
I would bet also the problem is in the regulator valve. The screen orfice plug,(screw driver slotted plug in center under cover of reg valve) may be loose or over sized. New orfice is .031 but often have to be drilled out a little to compensate for wear and some guys drill them too much. If that is ok, I would look at the ball and seat under the regulator valve piston.
 
(quoted from post at 22:46:19 07/25/14) I have a 560 diesel with 2 point. For some time the hitch would work sometimes and sometimes not, now it will not work at all. There is no sqeelling when the other Hydraulic levers are activated and the power steering works. Is the main pump shot?
I had acustomer that had bouhgt the 560 new in 1962. He called and said his hitch would not go up and the steering was sluggish. I asked him when the last time he changed the HYTRAN and he had done that six months ago . Ok did you change the hyd. filter then also? nope, DONT HAVE ONE. Well when I showed him where it was ha about had a cow. This was about 1989. So, I opened the filter flange and picked the filter out with my fingers and some long tweezers. Installed the new filter and every thing worked just like it was supposed to....Kenny
 

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