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Allis-Chalmers Model D grader wheel bearings

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wn willis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wn willis Quote  Post ReplyReply Direct Link To This Post Topic: Allis-Chalmers Model D grader wheel bearings
    Posted: 23 May 2019 at 11:58am
Does anyone have any info on length of time it takes to change wheel bearings on the tandems of a model D? Inner & outer bearings.
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ac fleet View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ac fleet Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2019 at 8:53am
It would depend on a lot of things. --How fast you can work, how many helpers, what is stuck and hard to get out, etc. , etc.---- I looked at mine, and there is no way I would tackle it!
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wn willis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wn willis Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2019 at 9:28am
Yep. I`m having that same thought. Thanks.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote DonBC Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2019 at 12:12pm
I pulled two of the axles on mine without much trouble but didn't change any bearings. When I got my D grader two wheels were loose and the tapers and the keys and keyways were damaged due to a flaw in the original manufacturing. I had to have these machined to fix the problem. I would say that the biggest hurdle would be breaking the wheel free of the axle because of the tapered shaft. Mine were already loose so that was not a problem for me.
Jack of all trades, master of none
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wn willis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wn willis Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2019 at 2:44pm
The outer oil seals are leaking,and have to be changed. Thought I would change inner and outer bearings while at it. I`ll post the results when completed. Not looking forward to the task.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ages Cat Quote  Post ReplyReply Direct Link To This Post Posted: 27 May 2019 at 7:42pm
The hubs  were a problem for us. Ours had a broken chain. When one opens one of these old machines up, you never know what you will find. Our machine needed pivot bushings,  axle seals, new chains, the bearings were not all bad, however. Oil seals were put in backward so the fluid was moving into the center differential from the chain cases. 
Curt Anderson
HD3, HD5B, HD6E, HD6AG, HD6B dozer, HD6E dozer I-400, 615, ACP25, 1956 D Special Grader, AC 540 wheel loader, #84 AC plow, Simplicity tractors.
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wn willis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wn willis Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2019 at 8:13am
any trouble getting the bearings off?
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wn willis View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote wn willis Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2019 at 8:16am
Thanks. I haven`t started on it yet. What did you use to pull the wheels?
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Ages Cat View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ages Cat Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2019 at 7:52pm
The hubs are tapped for 1" bolts. Drill a steel bar to match the holes, with two bolts and tighten. It may require some heat. The bearings are not difficult to remove after you have endured the hubs.
Curt Anderson
HD3, HD5B, HD6E, HD6AG, HD6B dozer, HD6E dozer I-400, 615, ACP25, 1956 D Special Grader, AC 540 wheel loader, #84 AC plow, Simplicity tractors.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Ian Beale Quote  Post ReplyReply Direct Link To This Post Posted: 28 May 2019 at 11:38pm
"The hubs are tapped for 1" bolts. Drill a steel bar to match the holes, with two bolts and tighten."

Or use two bolts to attach the bar to the wheel and have a forcing screw that pushes on the end of the axle.  Then when you have that screw  as tight as you can get it flog the end of the forcing screw with a BFH - the bigger the better.  Seems a 28 pounder works fine on Cat 12 hubs.

You could just use the two bolts if you make sure you can get a clean hit to the end of the axle - maybe weld a bit of steel so the hammer will  clear the bolts
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