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5000 with Q720 loader leaks down

E

ed1

Member
My 5000 has a Quickie loader (Q720) and the bucket will not hold position. The bucket rolls forward( engine on or off). Looked at the installation manual, but I cant figure it out. Would appreciate any input.
Thanks,
ed1
 
It could be that one or both of the bucket curl cylinders is/are leaking internally, or it could be the control valve spool is leaking internally.

If you want to isolate things to troubleshoot exactly what is leaking, first switch the lines at the control valve so that the spool that normally controls the lift arms now controls the bucket curl, and vice versa, and then let it sit with the arms raised and the bucket curled to see which one leaks down. If the lift arms leak down then it is the control valve, but if the problem stays with the bucket curl, then it is one or both of the bucket cylinders. You could then isolate the problem more by disconnecting and plugging the lines to one of the bucket cylinders and see if it leaks down. If so, at least the one bucket cylinder still in the circuit is leaking. If no, then the one that is disconnected is the likely culprit.

As Shaun said, it is probably better to reseal all o f the cylinders if one is leaking, as they are allow of the same age and the others won't be far behind the first. But if it is the control valve leaking, replacing the cylinder seals won't help.
 
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