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 | atilak
Join Date: Dec 2004 Posts: 3 Indiana 
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2004-12-19 102518
I have a Kubota B20 tractor I bought used with a BT750 back hoe and TL420 loader. When the tractor is parked, stabilizers, bucket, hoe, etc. would all drift from their positions in a day or two. One of the stabilizer cylinders had a leak which I had fixed and thought would solve the problem. I also replaced the hydraulic fluid and all the filters. It did slow the drift dpwn considerably. Now the drift still occurs over a period of over a week, very slowly. Is this normal? If not, what can I check, and how do I fix the problem?
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| JimP
Join Date: Jul 2003 Posts: 58 NY
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2004-12-19 102520
A week? Consider yourself lucky... Check the archives for this problem happening in hours on brand new tractors including the big three. ....
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 | bmlekki
Join Date: Oct 2003 Posts: 185 Upstate, NY
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2004-12-19 102521
My JD 790 FEL will leak down while i'm using it... If i park the tractor and the FEL is empty, 5 feet up, you can here it creek down in about 2 hours it will rest on the ground. Its more annoying when the machine is running and it goes down... just as fast ....
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| DK35vince
Join Date: Feb 2002 Posts: 689 Western,Pa. 
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2004-12-19 102524
Some leakdown in the backhoe is normal.
Taking a week to leak down is considered good. ....
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 | earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan 
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2004-12-20 102616
I wish my backhoe took a week to leak down! ....
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 | beagle
Join Date: Jan 2004 Posts: 1333 Michigan 
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2004-12-20 102617
The leakdown is normally through the valve spools, and is normal. The tolerance the spools are machined to, along with normal wear allows some fluid to flow through the spool housing. Definitely normal. ....
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| earthwrks
Join Date: Dec 2003 Posts: 3853 Home Office in Flat Rock, Michigan
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2004-12-20 102620
If you are concerned about leak-down, you can get compact-size check valves that go between the hose fitting and the cylinder port. Cost about $15 each, but reduce flow by a few GPM. If you still get leak down then the cylinder piston seals themselves are bad. ....
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| atilak
Join Date: Dec 2004 Posts: 3 Indiana
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2004-12-20 102634
Thanks for the reply. I feel better now. I just thought that their might be something wrong. Occassionally I have driven past a construction site and saw a tractor parked for the night with all four wheels off the ground. Other times, I have driven every dat past a tractor with a loader bucket up in the air with an advertising sign on it and it never seemed to be dropping. Thanks again. ....
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