[AT] MM U Question

[jahaze at aol.com]

Thanks Bear,
 
My problem is a little unique.  I have a UG with a broken rear axle.  The UG is the American grader conversion using a MM U with a unique serial number (mine is #79 out of 100).  The rear end has a UG tag, so I don't know if it has anything special inside or not.  I do know that it had a locking differential to prevent rear wheel spin while opperating ( I have already removed that).  The axle does not have the big nut on the end like most U's, I think it is held in by a locking cap on the outside of the housing.  I took this off, but have not been able to get the axle out of the bull gear.  I can move the axle (with a lot of force) about five inches into, and out of the bull gear, but it hangs up with about 2-inches of the axle still in the bull gear. This unit did not have a PTO, I have taken off the rear cover, and the top cover so I have as much access as I can get.  The only thing I haven't done is remove the axle housing, but it sounds like that need to be my next step. 
  The problem is it requires me to to completely dissasemble the opperators platform, and work aorund the heavy steel structure that makes up the grader frame.  It's no easy task, so I keep looking for another option.
 
Is there some kind of retainer ring between the axle housing and the bull gear that's keep the axle from sliding out? I've been working on it on and off for about three years and am determined to get it done in 07.  From the offers I have received for it, this might be my ticket to a new pole barn!
 
Thanks for your help, I'm stuck.
 
Enjoy, Joe
 
 
-----Original Message-----
From: mmman at netscape.com
To: at at lists.antique-tractor.com
Sent: Mon, 18 Dec 2006 9:58 PM
Subject: Re: [AT] MM U Question


Joe
I have 6 U MMs both UTU and UTS and a couple of UBUs.   My service and parts 
manual is loaned out but the the best of my memory you need to do the following:

l.  block up under final drive safely
2.  remove PTO assembly  ( you may have to remove the transmission top cover but 
only on the UTU as I remember it)
3.  Straighten bull gear retaining nut lock (with little room in the rear end, I 
use a little heat to help straigten the lock ring flat)
4    Remove the bull gear retaining nut. 

Remove axle housing to rear housing bolts and remove axle shaft and housing 
assembly as a  unit. Also the factory manual specifies using  Permatex or 
suitable thread sealant when re-installing the rear axle housing.   

I do remember that the factory torque specs on the axle nut going back is 360 ft 
pounds.  Good luck and if you have more questions, just ask.  I do have extra 
axles for both UTU and UTS if you have a bad axle and can't find one locally. 

Bear 

"Life should not be a journey to Heaven with the intention of arriving safely in 
an attractive, well preserved body, but rather to skid in sideways, champagne 
and strawberries in hand,,and screaming WOO HOO - What a Ride!" 

--- JAHaze at aol.com wrote:

From: JAHaze at aol.com
To: at at lists.antique-tractor.com
Subject: [AT] MM U Question
Date: Sun, 17 Dec 2006 16:16:04 EST

Does anyone have an exploded view of the internal rear end workings on a MM 
U?  I've still trying to get that stupid axle out after three years of trying 
everything I can think of and am looking for another clue.  It was real nice in 
Michigan today so I spent some time working on it and made absolutely no 
progess once again. Any help you can provide would be appreciated.

Enjoy, Joe

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