Farmall M Loader Weirdness

big a · Mar 7, 2011

Hi guys. Just finished swapping my old Seargeant hyd. cable loader for a Paulson. Old loader raised and lowered fine, but upon connecting the new one, I find it raises and lowers normally, but takes about 2 minutes to lower the last couple feet. I have this plumbed into the Liftall, with each cylinder connected to its respective side port. Old loader connected the same, no problems there.
I'm not using the delay port, and nothing seems to bind mechanically. Any ideas here?
Thanks

rustyfarmall · Mar 7, 2011

(quoted from post at 11:58:10 03/07/11) Hi guys. Just finished swapping my old Seargeant hyd. cable loader for a Paulson. Old loader raised and lowered fine, but upon connecting the new one, I find it raises and lowers normally, but takes about 2 minutes to lower the last couple feet. I have this plumbed into the Liftall, with each cylinder connected to its respective side port. Old loader connected the same, no problems there.
I'm not using the delay port, and nothing seems to bind mechanically. Any ideas here?
Thanks

2 thoughts, and that is all they are, just thoughts.
1 Maybe the cylinders are a bit rusty inside?
2 Maybe the system is a bit over-full, and there is no place for the excess oil to go?

Roger46 · Mar 7, 2011

Do the cylinders have some kind of vents on the other side of the piston? Sounds like the air is not escaping from the back side of the cylinder pistons. Roger

Janicholson · Mar 7, 2011

Roger may be correct.
If the lift cylinders are double acting, with ports on both ends, the upper ends need to have small air vents screwed into them (to keep them clean but allow air to get out) or the upper ports can be hosed to the drain of the Liftall with a cross fitting and a close nipple. this allows the upper cylinder volume to add to the total reservoir volume. Jim

big a · Mar 7, 2011

Thanks for the input guys. These are just single acting cylinders, and no bleed ports or anything. I was able to collapse both cylinders by hand with no binding. Took the fill cap off the Liftall...no back pressure.
My next step will be to disconnect one cylinder at a time, and see if the problem follows one side or the other.
Uncle had a similar setup years ago, and I recall his having both cyls plumbed into one port. Maybe for a reason?

Janicholson · Mar 7, 2011

No reason for that, See if one of the hoses has a delay fitting in the coupling. If so, that may be it. Another issue is a hydraulic hose with an internal break that flows one direction, but flaps out like a heart valve in the other direction. I have seen it in both hydraulic lines, and radiator hoses. Best of luck Jim

rustyfarmall · Mar 7, 2011

(quoted from post at 18:55:50 03/07/11) Thanks for the input guys. These are just single acting cylinders, and no bleed ports or anything. I was able to collapse both cylinders by hand with no binding. Took the fill cap off the Liftall...no back pressure.
My next step will be to disconnect one cylinder at a time, and see if the problem follows one side or the other.
Uncle had a similar setup years ago, and I recall his having both cyls plumbed into one port. Maybe for a reason?

If you are plumbed into the right side port, and the front port on the left side, essentially you already are plumbed into just one port. The right hand port and the left hand port are "teed" at the pump.

big a · Mar 9, 2011

Pretty sure you are onto something there Jim. Problem seems to.be on the RH cylinder. At full extension, removed from the loader, it leaed like a sieve at the shaft seal, and I hear something rattling inside. I suspect its blocking oil return flow. Things work normally with just LH side connected.

Any idea if those inline delay valves are available, or where a suitable replacement can be found? Controlling rate of drop is a bit scary without them.

Farmall M Loader Weirdness

big a

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rustyfarmall

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Roger46

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Janicholson

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big a

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Janicholson

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rustyfarmall

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big a

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