M upper bolster shaft rebuild / replacement

big a

Member
Swapped the narrow front on my 1939 M over to an original IH wide front with setback plate.
Never really had the "death wobble" but it did wander pretty bad.
My vertical bolster shaft is worn pretty bad where lower bushing rides, which is messing up the gear lash, and it's worse now, without the thrust from the tricycle front.
Bushings will help, but need to get a new shaft, or build mine up and turn it back down.
Anybody know if you can buy a new one?
What diameter should one be on the large journal?
 
I can't answer your question but just wanted to add that on our 47 M if I tighten up the top gear to where it don't have any wobble you can't hardly turn the wheel. I have not torn into it yet but I know the vertical shaft has a lot of play on the bottom.
Our 49 M has a single wheel front end. It is in pretty good shape. Would love to have a wide front end for it.
Our Farmall pics.
 
So, with new bushings in place, it looks like small end needs to measure 1.50" and big end at 3.625"
Absolutely floored how much wear and especially taper is worn into the big end of the shaft. It's .060 out of round and about .045" tapered, getting smaller toward the flange where the tricycle bolts up.
Little end worn round, but .045-.050 undersized at the bushing journal.
79 years of wear to undo here!
 
Where did you find the bushings and thrust bearing for your rebuild. I need to rebuild my 300 but can't find the parts. Have tried all of the internet places.
 
(quoted from post at 15:13:14 05/16/18) Where did you find the bushings and thrust bearing for your rebuild. I need to rebuild my 300 but can't find the parts. Have tried all of the internet places.

Call a case ih dealer
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top