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Oliver, Cletrac, Co-op & Cockshutt Tractors Discussion Forum
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Re: 1755 hydraul drive unit moving

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ollie gm

09-13-2013 19:01:44

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Why it's moving-- is the fact that when you "tapped" the shaft into its final location the center of the pto hub on the flywheel was forced off center. When the engine is cranked the effect internally is like a camshaft lobe and is causing your hydraul-shift to move around.

A quick check to see if the above is true is to yank the pto shaft and crank the motor. If there is some scuffing on the shaft, there is no need to turn the motor.

Before you inserted the shaft you should have had the sprockets parallel and on center. The manual shows how to do the proper alignment with various shim thicknesses.

What I do is insert the pto shaft into the 3 speed before I drop the motor in. Just to make sure murphy isn't lurking. Good luck.

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09-13-2013 19:42:51

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 Re: 1755 hydraul drive unit moving in reply to ollie gm, 09-13-2013 19:01:44  
I was able to pull the shaft and cranked the motor. It still moves, but not as bad. I think I need to remove the chain from the coupler and crank. How does the PTO hub get off center. It is bolted to the flywheel? If it is off center, how does one get it back on center? Or are you saying it isn"t on "center" to begin with because the engine may not be leveled?

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ollie gm

09-14-2013 09:53:10

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 Re: 1755 hydraul drive unit moving in reply to goatfarmer, 09-13-2013 19:42:51  
Right now I would say your only problem is a mis-aligned coupling. I would shim the engine mounts until the alignment is good then most likely you have eliminated the movement. Your PTO hub should still be centered OK.

I worked on a 1855 where the owner had forcibly "slugged" the PTO shaft into its final position and the result was a destroyed PTO hub. The end result was the hub being off center which really made a racket when running. I had this experience in the back of my mind when I was referring to your problem.

Good luck.

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09-14-2013 10:38:56

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 Re: 1755 hydraul drive unit moving in reply to ollie gm, 09-14-2013 09:53:10  
Thanks. I now understand your concern. I didn"t "slug" it into position, but tapped it because the thought was "new" into "new" might be a tight fit. I was able to get it out with out too much trouble. Will try shimming it. Thanks.

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J. Schwiebert

09-15-2013 17:22:16

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 Re: 1755 hydraul drive unit moving in reply to goatfarmer, 09-14-2013 10:38:56  
Give me a call Monday night.

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