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Help..Hydraulics stuck


scrowba

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?I have a 4040 with a Danco SV Loader on it. This morning I went to move some dirt and kapow... My hydraulic lever which raises and lowers the bucket will only raise. When I go to push the lever forward it won't go. When I pull back to raise it is nice and smooth. It will go back to the neutral(center) position with no problem. When I go to push the lever forward to lower it won't budge. Any ideas? Thanks
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OK, I am a newbie, Where would I bleed the system from? and how much fluid should I expect to come out? Thanks
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This sounds like a mechanical problem, not a hydraulic issue. There are 2 possibilities that pop into my mind. First off is something came out of the pump or a line and has wedged into the spool valve blocking it from stroking as you want it to. This isn't all that uncommon a problem. It's just that these pieces of debris are normally passed on without issue finally winding up in the filter. Second, there is a centering spring assembly on the outside of the spool opposite of the lever. This is under a small vented cover with a couple of screws holding the cover on. If rust, debris, or a broken return spring gets trapped under this cover it will often restrict the movement of the spool. I'd pull the spring cover off the spool valve first since it's external and clean and inspect everything and look for any sign of anything binding. Then removing the valve and disassembling it on a workbench will be in order.
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I was gonna say look at the spring, but see I was beaten to it. Had the same thing on my Massey loader valve, but in my case it was a broken spring jamming up.
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