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Harry Ferguson Tractors Discussion Forum
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Re: shimming rear axles...

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Author  [Modern View]
Bruce(OR)

01-26-2013 14:09:51
97.115.30.214



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So, if the clearance is too wide, what then gets damaged?




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Jason S.

01-26-2013 17:34:30
174.254.145.197



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 Re: shimming rear axles... in reply to Bruce(OR), 01-26-2013 14:09:51  
The axle bearings will get damaged, because the cup will not stay tight in the cone so it will hammer the axle bearing out eventually plus with the axle moving in and out it will act like a pump and you will have grease running down onto your brake shoes.



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Bruce(OR)

01-26-2013 19:06:46
97.115.30.214



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 Re: shimming rear axles... in reply to Jason S., 01-26-2013 17:34:30  
I just read the book. Im actually had it pulled out for the cam nut torque question and flipped it to the rear axle page.
yada, yada, blah, blah, blah...
"Excessive clearance will result in damaged axle shaft oil seals..."
It appears the outer bearing are retined by an axle shaft collar and therein is the bearing preload with floating axles that slide into the final drive. If Sure Seals have been installed then excessive clearance should be a moot issue.

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Jason S.

01-27-2013 13:14:52
174.228.66.83



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 Re: shimming rear axles... in reply to Bruce(OR), 01-26-2013 19:06:46  
But if the axle can work back and forth because of excessive clearance it can work the collar off.



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Bruce(OR)

01-27-2013 22:35:08
97.115.30.214



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 Re: shimming rear axles... in reply to Jason S., 01-27-2013 13:14:52  
To lazy to pull the book back out. Please explain to me how that would work. The retainer collar is heated up and slides into place down the length of the axle shaft. It shrinks into place and is retained by an interferance fit. Now the entire axle shaft is a "floating style" axle meaning it has no retainer clips inside the differential to hold the axles in place. So, what holds the bearings in place? the axle shaft retainer?
Feel free to consult your I&T shop service manual. Figure F43
Part 24 is effected by part "A". How does part "A" effect part 21?
Part "A" will have an effect on 25 and 18 contact area when not running Sure Seals.
The installation of Sure Seals negates the fitting problem of 25 and 18.
Also note worthy are the long splines on the end of 18.

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JMOR

01-26-2013 20:36:19
72.181.173.171



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 Re: shimming rear axles... in reply to Bruce(OR), 01-26-2013 19:06:46  
Quoting Removed, click Modern View to see"If Sure Seals have been installed then excessive clearance should be a moot issue." No, you still have bearing life to be concerned with. Bearings are not happy running with a bunch of slop.



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Bruce(OR)

01-26-2013 20:58:45
97.115.30.214



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 Re: shimming rear axles... in reply to JMOR, 01-26-2013 20:36:19  
Granted. The axle is a floating style and the bearings are held in place with the retainer collar. Consequently, the shims give the proper clearance to keep the axles from rubbing and maintain axle seal integrity. If installing Sure Seals, axle seal integrity becomes a moot issue. Then the only issue remaining is to prevent axle ends from contacting inside the carrier. Looking at the diagram the outer shaft retainer holds the bearing and is held in place with the collar. That collar being an interferance shrink fit. I believe you can find this on page 25 of the I&T shop manual. Figure F43 items 18,25,21 and 20.
Paragraph 94 makes mention of the oil seal.

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