Hydraulic system: Back Hoe  -- Tractor Attachments Implements 3ph Discussion Forum and Review Hydraulic system: Back Hoe -- Tractor Attachments Implements 3ph Discussion Forum

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 12-19-2004, 08:07 Post: 102518
atilak



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 Hydraulic system

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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 12-19-2004, 09:01 Post: 102520
JimP



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 Hydraulic system

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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 12-19-2004, 09:12 Post: 102521
bmlekki



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 Hydraulic system

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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 12-19-2004, 10:18 Post: 102524
DK35vince



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 Hydraulic system

Some leakdown in the backhoe is normal.
Taking a week to leak down is considered good.






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 12-20-2004, 15:43 Post: 102616
earthwrks

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I wish my backhoe took a week to leak down!






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 12-20-2004, 15:51 Post: 102617
beagle

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 Hydraulic system

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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 12-20-2004, 16:24 Post: 102620
earthwrks

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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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 12-20-2004, 20:09 Post: 102634
atilak



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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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Discussion Boards > Active Subjects > Messages as Posted > Back Hoe Forum

Thread 102518 Filter by Poster:
atilak 2 | beagle 1 | bmlekki 1 | DK35vince 1 | earthwrks 2 | JimP 1 |




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