Author Topic: Sprocket shaft bearing walked?  (Read 312 times)

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Offline xlfan

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Sprocket shaft bearing walked?
« on: April 16, 2018, 01:35:07 PM »
Is it possible that a 55-57 sprocket shaft bearing can walk outward,  if sprocket nut tension is lost? Or is it just caused by sloppy assembly work?

Offline Ohio HD

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Re: Sprocket shaft bearing walked?
« Reply #1 on: April 16, 2018, 03:49:01 PM »
A loose sprocket nut or compensator can definitely cause the Timken to move on the sprocket shaft.
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Offline kd

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Re: Sprocket shaft bearing walked?
« Reply #2 on: April 16, 2018, 07:15:50 PM »
 :agree:  Absolutly
KD

Offline xlfan

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Re: Sprocket shaft bearing walked?
« Reply #3 on: April 16, 2018, 09:21:34 PM »
A loose sprocket nut or compensator can definitely cause the Timken to move on the sprocket shaft.

It isn't the timken that has moved on the sprocket shaft, it is the timken bearing race that has moved in the engine case bore. The 55-57 timken is a bit different than the 58-UP timken.

Offline Ohio HD

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Re: Sprocket shaft bearing walked?
« Reply #4 on: April 17, 2018, 02:30:11 AM »
A loose sprocket nut or compensator can definitely cause the Timken to move on the sprocket shaft.

It isn't the timken that has moved on the sprocket shaft, it is the timken bearing race that has moved in the engine case bore. The 55-57 timken is a bit different than the 58-UP timken.

Pretty sure that the Timken is the same all the way to 1968, they change in 1969. But in any case, the race can walk out of the case if the sprocket nut is loose. Eventually the case can get wallowed out and the race will not be a press fit any more.

This is a case where the sprocket nut was loose and the crank beat the races loose and damaged the left side case. Now can they be installed wrong, not pressed all the way in, sure. But once things are loose, kinda hard to say what caused it.

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Offline xlfan

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Re: Sprocket shaft bearing walked?
« Reply #5 on: April 18, 2018, 01:26:00 PM »
You are right of course, the timken changed after 1968, I stand corrected. From the wear marks on the pinion bearing race, it looks like the onepiece left side timken race hasn't bottomed on the inner retaning ring. I don't know how to compress pictures enough to get accepted her.

Offline Scott P

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Re: Sprocket shaft bearing walked?
« Reply #6 on: May 01, 2018, 02:21:22 AM »
Those can be repaired.
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