Allis UC Backlash on Ring and Pinion
Printed From: Unofficial Allis
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=195771
Printed Date: 21 Jun 2025 at 12:59pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis UC Backlash on Ring and Pinion
Posted By: nowaktj
Subject: Allis UC Backlash on Ring and Pinion
Date Posted: 20 Jun 2023 at 10:29am
Anyone on here try adjusting the backlash on the ring and pinion of an Allis U? The adjusting nuts are used to push the races but my races appear to not budge one bit (See 1st image pictorial/2nd image text)  ------------- D19D, D17D, WD, WC, Snobee, #83 Plow, SC Blade, 14' disk, 400 series planter, B , Terra Tiger, M Dozer w/Baker Blade, TL-12, 42S Grader, G |
Replies:
Posted By: steve(ill)
Date Posted: 20 Jun 2023 at 12:40pm
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I would back one side out a couple turns,, then remove the nut on the other side.. Then PUNCH the race with a brass drift to get it to move.. When NEW, the nuts probably will push the race back and forth.. After setting for 70 years, a little SHOCK LOAD should help. ... Once they move a little, they will probably adjust with the nuts. ------------- Like them all, but love the "B"s. |
Posted By: SteveM C/IL
Date Posted: 20 Jun 2023 at 5:23pm
| I can't tell how that's made but if it has brg caps tightened down on races,you may need to crack them loose to get things to move. Not floppy just not tight. |
Posted By: TramwayGuy
Date Posted: 20 Jun 2023 at 10:33pm
| The cups will move. Like Steve says, they’ve been there a long time in one spot and will take a bit of encouragement at first. |
Posted By: DrAllis
Date Posted: 21 Jun 2023 at 6:47am
| Are you intending on tightening up the gear backlash ?? Generally, decreasing backlash on old/worn gears like that will guarantee a noisey howl when in road gear, that may not have been there before. Just sayin........ |
Posted By: nowaktj
Date Posted: 21 Jun 2023 at 9:40am
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Long story...this was a sugar cane tractor. I flipped the differential around to get the forward gears in the normal forward position. That is the reason I want to reduce the backlash to the books spec. In doing the flip, I torqued the 8 bolts that retain the differential to what I thought was the correct torque. I think I may have tightened them too much and that is preventing the races from moving. I tried moving the races with a drift punch and they have no intent on moving! I wonder what is the "correct" torque on those 8 nuts??
------------- D19D, D17D, WD, WC, Snobee, #83 Plow, SC Blade, 14' disk, 400 series planter, B , Terra Tiger, M Dozer w/Baker Blade, TL-12, 42S Grader, G |
Posted By: steve(ill)
Date Posted: 21 Jun 2023 at 2:12pm
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I dont see how torquing the bolts would effect the backlash or bearing position.. If the bearings are worn a little, its possible the BIG NUT is bottoming out on the case before it pushes on the bearing race ? If you flipped the gear, you had to have the bearings out ?? Didnt you take out retainer #13 ?? If they dont move in far enough, then i would check the nut bottoming out on the case.... no good reason for the bearing race to not slide right in toward the bevel gear, unless it is hitting something ?
------------- Like them all, but love the "B"s. |