Transmission bearing for a B
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=152604
Printed Date: 28 Oct 2025 at 10:13am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Transmission bearing for a B
Posted By: Kiwi
Subject: Transmission bearing for a B
Date Posted: 31 Jul 2018 at 3:32am
| Hi all I need to replace the transmission main shaft bearing the needle roller bearing at the back on a Allis B .can anyone tell me the bearing number or the measurements of this bearing.the tractor has a 1-3/8 pto fitted. |
Replies:
Posted By: Ed&Sherry
Date Posted: 31 Jul 2018 at 6:19am
| the last http://i.viglink.com/?key=d7d7aa5ced1ebc0821effbccab897fa0&insertId=f48d570d25a76679&type=H&exp=60%3ACI1C55A%3A4&libId=jk9lmubn010009ks000DAcyex7mit&loc=http%3A%2F%2Fwww.allischalmers.com%2Fforum%2Ftransmission-bearing-for-a-b_topic152604.html&v=1&iid=f48d570d25a76679&out=https%3A%2F%2Frover.ebay.com%2Frover%2F1%2F711-53200-19255-0%2F1%3Ftoolid%3D10029%26campid%3DCAMPAIGNID%26customid%3DCUSTOMID%26catId%3D6000%26type%3D2%26ext%3D183312835259%26item%3D183312835259&ref=http%3A%2F%2Fwww.allischalmers.com%2Fforum%2Ffarm-equipment_forum2.html&title=Transmission%20bearing%20for%20a%20B%20-%20AllisChalmers%20Forum&txt=%3Cspan%3Etransmission%20%3C%2Fspan%3E%3Cspan%3Emain%20%3C%2Fspan%3E%3Cspan%3Eshaft%20%3C%2Fspan%3E%3Cspan%3Ebearing%3C%2Fspan%3E" rel="nofollow - |
Posted By: Kiwi
Date Posted: 01 Aug 2018 at 3:18am
| Thanks Ed the bearing number you gave me has a measurement of 40mm OD but the bearing in my English B is 47mm OD are the EB’s differen to the USA B |
Posted By: K-Mo
Date Posted: 01 Aug 2018 at 5:37am
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AGCO Bearing Xref says the 70211700 is a NU303ECP. K-Mo
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Posted By: KOG
Date Posted: 10 Jun 2022 at 2:41pm
| Just ordered one for my 1939, about $45 |
Posted By: SWPennTom
Date Posted: 27 Oct 2025 at 6:27pm
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I'm changing out the trans main shaft on my '49 A/C model C. The main shaft splines have been destroyed, so I am also replacing the clutch shaft and sleeve with good used. The issue I have is about the rear bearing assy on the trans main shaft ( part no.s 211699 and 211700 ). Is the bearing race a press fit or should the race spin freely, being retained the snap ring? On the replacement used shaft I got, the race appears to be a press fit. It's frozen on the end of the shaft, no evidence of corrosion locking it on. The shaft I'm removing from my C, the race spins freely, the snap ring holds it in place. Don't know if I should just go with it or cut the race off the 'new' main shaft, and replace it with my existing race.
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Posted By: steve(ill)
Date Posted: 27 Oct 2025 at 6:43pm
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if you are talking about the inner race of a bearing, the race does NOT spin on the shaft.. the rollers spin on the RACE.. Inner and outer races should not "spin" as that would cause wear to the shaft or housing.. this is what i used years ago... Top shaft
bearing rear end in PTO housing
Bearing FAG roller, inner race on trans shaft NU303 1.850 x .669 ID (of inner race) x.551 wide ------------- Like them all, but love the "B"s. |
Posted By: SWPennTom
Date Posted: 27 Oct 2025 at 9:48pm
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Thanks for that info! Saved me from making it worse. The replacement trans main shaft is from a model C that is older, very minimal wear, not like mine at all. I did not expect to see this when I took the torque tube off. The shape of the wear pattern makes me think that it was jamming the clutch shaft into the back of the crank when the tractor was under load.  |