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B, C, CA thrust bearing question

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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=108500
Printed Date: 17 May 2025 at 11:10am
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Topic: B, C, CA thrust bearing question
Posted By: ktm911
Subject: B, C, CA thrust bearing question
Date Posted: 04 Jul 2015 at 9:53am
I had to get a new crank after the old one had its thrust bearing wear a pocket into the crank. It had new bearings in it (what looked like new) and the thrust one was badly worn.

It only had half a bearing with a thrust surface. Is this normal, or should both halves have a thrust surface on the sides?

Thanks for the help



Replies:
Posted By: PaulB
Date Posted: 04 Jul 2015 at 10:40am
Yes: The B,C and CA engines only have a single shell as the thrust bearing. If the machine shop did a correct job of grinding the crank, the front journal should be properly re-sized to fir a new bearing shell after the timing gear is installed.

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If it was fun to pull in LOW gear, I could have a John Deere.
Real pullers don't have speed limits.
If you can't make it GO... make it SHINY


Posted By: Dick L
Date Posted: 04 Jul 2015 at 3:08pm
If you look close at your block you will find that it is not made for the thrust bearing shell.




Posted By: Ken in Texas
Date Posted: 04 Jul 2015 at 6:03pm
If end play is excessive with the new thrust bearing in your rebuild kit the crank has to be welded up and reground to speck.
If I remember right the new thrust bearing in the last rebuild kit I used was shorter than the one it was meant to replace. I just used the old one to fix the excess end play.



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