Hey -- Jason S

[Bruce(OR)]

This being a TO-20 with Sure Seals...

"But if the axle can work back and forth because of excessive clearance it can work the collar off."




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.
 

[Jason S.]

I don't use an I&T manual. All I have is the real Ferguson shop manual. When you shim it you are setting the bearing preload. If you set it too wide that is that much less preload on the bearings and it allows the axle to move back and forth that much more. As you use it with the clearances too wide and the axle moves back and forth and the bearing works against the collar and of course it will try to push the collar off as the axle tries to pull out. Hopefully the collar has been heated and installed properly, but are there Fergusons out there that have just had the collar pressed on? Yes there are, and the people that own them may not know because it may have been done by a previous owner. Now those that have been done improperly are already on the edge of coming apart with the clearances set properly. If they set them too wide then you have just turned a borderline problem into a could be potentially fatal situation because the collar will fail. John(UK) said the collar could come off when run like that and he knows enough about these tractors to write 47 I&T manuals about them.Plus with not enough preload the bearings will have a shorter life. Sure seals or not if the axle works back and forth enough it will act like a pump and let oil leak out.So why not set it properly and be done with it?
 

[Bruce(OR)]

Lets get back to the bearing preload.
How do the paper shims contribute to beraring preload?
Take a better look at your Fergy manual.
You might notice the paper gaskets have zilch to do with bearing preload.

Time for dinner. You have fun!
 

[Bruce(OR)]

Lets get back to the bearing preload.
How do the paper shims contribute to beraring preload?
Take a better look at your Fergy manual.
You might notice the paper gaskets have zilch to do with bearing preload.

Time for dinner. You have fun!
 

[Jason S.]

I know its Ford but its the same set up, same collar so read this.

http://www.oldfordtractors.com/rep.htm#q15

This is the time to inspect the axle bearing and cup for wear and to reset the axle bearing load. Make sure the bearing looks good, no pits in the cup or on the rollers. Make sure the backing plate, bearing retainer, and all shims and/or gaskets are clean. I select the shims needed to load the axle bearings to zero load. Zero is hard to describe. It's no bearing load and no end play. If you're not sure how many shims to use, follow the procedure in the shop manual to set the load. I think their procedure loads the bearings a little too tight, but it's worked ok for a lot of years, so who am I to question it. Zero load is desired, but if you're in doubt, a little too loose is better than too tight. Too tight will ruin the bearings. Too loose will let the seals leak again. Setting the axle bearing preload with the shims is a commonly misunderstood procedure. Remember you are adjusting the total preload for both axle bearings. The axles butt together in the center of the differential and have a tapered bearing on each outside end. The total number of shims determines the preload and each shim affects both axles equally. You're not setting each side, you're setting the total
 

[Bruce(OR)]

Too bad the ol" boy didn"t bother to look at how an axle is held in with the collar.