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Discussion Forum

Hydraulic pump coupler

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Author 
Bill

02-18-2002 18:59:27




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I just bought a Schramm tractor/loader/backhoe. It was sold because the motor broke(No. 1 connecting rod broke and put holes in block and oil pan). The motor that was in it is not the original or even a Schramm motor(it's an IH 6 cylinder from a 1969 Travelall).
From here my description of things will get a little fuzzy as I don't know all the correct names for the pieces.
The coupler used to drive the hydraulic pump is bolted to the crankshaft pulley and appears to have the female end of a PTO setup welded to it. The male end of the PTO is welded to a sleeve that has a bore that is keyed to fit over the pump shaft which is also keyed.
The previous owner told me that the coupler broke and he welded it back together by "eyeing it up". The splines on both the female and male pieces are badly worn and are not useable. My guess is that the motor broke due to the vibration caused by the misalignment of the coupler. Does this sound reasonable?
A friend of mine who is more knowledgeable about tractors looked at it and thought that a motor he has from a chipper might fit in with some modifications. It's a 6 cylinder Ford 300 cu. in. motor. Anyone agree with that?
The differential is from IH and he says that some of the tractor looks similar to an "M" or "H" tractor. Would trying to find a tractor motor from IH be worth the time?
The tractor appears to have been built in 1956 based on the paperwork I got with the machine.
Getting back to the coupler problem. I'm thinking of trying to use some sort of flexible coupling(like a Lovejoy). The one problem I see is that the distance from the front of the crankshaft pulley to where the pump is bolted to the frame of the tractor is only about 8". I'm not sure if there is sufficient distance to put that kind coupler in. I assume that the coupler(PTO type) works if everything is lined up perfectly. I don't think I would be able to achieve the degree of accuracy needed to make it work. That is why I would like to use a flexible coupling. Can anybody give me any advice on what direction to take? Final thought, this tractor would be for my own use, and won't see much run time. So fixing it to run all day, every day like in a construction environment isn't necessary.

Thanks,

Bill

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