Posted by Paul57 on August 21, 2013 at 02:26:59 from (99.195.196.231):
Help please! I am getting really frustrated by the hydraulics on my SH's FEL.
The two cylinders worked and would lift the loader, but both leaked badly, so I replaced the big O-ring at the plug end, the little O-ring at the other end, and the 3 or 4 smallish rings that go on the cylinder (sort of a nested set of dust rings, I think).
New fluid, NO load on the cylinders: I could get the cylinders to extend sloooowly. They barely retracted at all. I figured it was air, so I dropped the front linkage ends to the floor and filled some more. Got a little better extending, but still not retracting. All with no load.
I could manually push them in when the tractor was off, with some effort.(The filler cap was off for this). Figured I"d avoid getting them stuck at full extended position again so I hooked up to the FEL. Now the system doesn"t have enough ooomph to lift the FEL at all.
I cracked the front (linkage) hose attachment and tried to lift. Sure enough, oil spurted out all over the place at high pressure.
So at this point, I"m wondering about the two rubbery cupped fittings at the base of the piston. They guy at the shop said they looked ok, but it seems to me that they must be letting oil flow by into the cylinder.
Is it possible they dried out over the week I had it all apart? The darn thing worked before I started on this mess (aside from the leakage).
Or is it air in the system? How can I bleed it if they won"t cycle in and out??
Given the high pressure oil when I cracked the hose connections, I"m leaning towards the rubbery cupped things, which I suspect should seal tightly against the outer cylinder housing. I"m kicking myself for not replacing them, but the hydraulic shop guy said they seemed ok to him.
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