Either the spool in the valve is bypassing to the other port or a cylinder is bypassing around the piston quad-rings. Hard to say which one, though I would lean more towards the cylinder seals. The valve spool is a lapped to the vavle body and if it is leaking it must be replaced. If the loader is running off of the tractor remote valves and have quick-couplings, just unplug them and watch the bucket. If not, you could plumb a ball valve on each line and close them, if the bucket "relaxed" then it is the seals in the cylinder. Rebuilding the packing gland and piston in a cylinder is fairly easy. I take no responsibility if you use brass ball valves (cheap) and they rupture. But they should not if you do not deadhead the circuit (end of stroke). Hope this helps.
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Today's Featured Article - Stories From Old Farmer - by K. Pratt. Old Farmer, a.k.a. Dale Jensen began posting messages to our discussion forums at the grand age of 75. With extensive knowledge of farming and tractors, he valued the past and the ways that went with it. He shared these values with us until shortly before his passing. I spoke with Dale in his last days and requested his permission to share some of his stories with the readers of our magazine. He agreed, and provided the
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