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Re: Farmall M Hydraulic system problem

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Author  [Modern View]

11-16-2012 08:59:12

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The probable reason the loader drops is beacause the cylinders that do the lifting have bad seals on their pistons. They are rebuildable. To check the seals put a jack under the bucket so that the jack is extended at least 8 inches.
Lower the bucket to remove all pressure from hoses. Remove the pressure hose from the Liftall and (avoiding loss of fluid) cap it. If the hoses run from both sides, cap both hoses.
Now lower the jack. If the loader drops as before, it is the seals in the cylinder. Local hydraulic shops fix them routinely. If it stays up, the Liftall controll is leaking. (much less likely) The return hoses are probably routed to a T at the fill pipe. If routed to the drain with a close nopple and T they will not squrit. Jim

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One Shot

11-17-2012 11:59:45

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 Re: Farmall M Hydraulic system problem in reply to Janicholson, 11-16-2012 08:59:12  
Dear Janicholson,
I neglected to state that the hydraulic bucket has 2 cylinders that lift the bucket and 1 cylinder that tilts the bucket. In addition to the bucket lowering on its own, the bucket also tilts slowly on its own. That being said, wouldn't the fact that if all cylinders are not holding indicate that the chances of all cylinders leaking by would be highly unlikely?

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One Shot

11-17-2012 11:52:25

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 Re: Farmall M Hydraulic system problem in reply to Janicholson, 11-16-2012 08:59:12  
Dear Janicholson,
When you say "Cap it", am I correct in assuming that you mean to cap it so the cylinders are air tight?

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11-17-2012 18:29:30

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 Re: Farmall M Hydraulic system problem in reply to One Shot, 11-17-2012 11:52:25  
Yes. The valving you are using may be the real issue. If you test the cylinders successfully the valves may be the source. Farmall belly pumps rarely leak down, valve systems used with them can and do. Jim,

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