Transmission Countershaft Wear Pattern

F4RM@11 · Mar 10, 2013

In the photo below, look at the coupler on the countershaft. Is that a wear pattern or is the coupler milled that way? The driving dog is worn like that on both the transmission side and pump side. Is it wear or by design?

rustred · Mar 10, 2013

from what i can see it looks to be wear.

Zachary Hoyt · Mar 10, 2013

I have never seen one quite that badly worn, though I have seen
them chipped and missing that amount of metal. The two edges
are parallel and straight when the coupler is new.
Zach

Bob M · Mar 10, 2013

Definitely wear! (Before it wore it was a simple, square-cut slot in both halves.)

I'd be looking for misalignment between the pump and countershaft centerlines. A possible cause could be the pump was not mounted tight to the torque tube. Or perhaps it was installed with dirt between the mating surfaces so the pump did not bolt up square.

Janicholson · Mar 10, 2013

If there was a thick gasket used, or it was run with the pump loose at some point. The wear is on the drive side of the slot. Jim

Janicholson · Mar 10, 2013

Looking at the other Image (one page back) there is obvious wear on the coupling. Were it mine ai would probably either get new parts, or mill the wear out of the drive and driven hubs, and make a new coupler to fit the wider slots. Jim

Super-H-Mike · Mar 11, 2013

Yes thats worn pretty bad, would be nice and square when new. When I was a kid, grandpa made us pull that coupler out whenever we were doing field work that didnt reqiure the hydralics, like plowing, discing, haying , etc..

Transmission Countershaft Wear Pattern

F4RM@11

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rustred

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Zachary Hoyt

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Bob M

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Janicholson

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Janicholson

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Super-H-Mike

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