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Transmission bearing for a B
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Kiwi View Drop Down
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Joined: 23 Jan 2018
Location: New zealand
Points: 390 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kiwi Quote  Post ReplyReply Direct Link To This Post Topic: Transmission bearing for a B
    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.
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Ed&Sherry View Drop Down
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Joined: 08 May 2010
Location: Owego, NY
Points: 234 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed&Sherry Quote  Post ReplyReply Direct Link To This Post Posted: 31 Jul 2018 at 6:19am
the last transmission main shaft bearing   is called a roller assy 211700
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Kiwi View Drop Down
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Joined: 23 Jan 2018
Location: New zealand
Points: 390 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Kiwi Quote  Post ReplyReply Direct Link To This Post 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
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K-Mo View Drop Down
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Joined: 09 Feb 2013
Location: Atlantic, IA
Points: 91 		Post Options Post Options   Thanks (0) Thanks(0)   Quote K-Mo Quote  Post ReplyReply Direct Link To This Post Posted: 01 Aug 2018 at 5:37am
AGCO Bearing Xref says the 70211700 is a NU303ECP.

K-Mo
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KOG View Drop Down
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Joined: 10 Jun 2022
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Points: 3 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KOG Quote  Post ReplyReply Direct Link To This Post Posted: 10 Jun 2022 at 2:41pm
Just ordered one for my 1939, about $45
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SWPennTom View Drop Down
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Joined: 06 May 2024
Location: Export, PA
Points: 7 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SWPennTom Quote  Post ReplyReply Direct Link To This Post Posted: 13 hours 51 minutes ago at 6:27pm
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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steve(ill) View Drop Down
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Joined: 11 Sep 2009
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Points: 88459 		Post Options Post Options   Thanks (1) Thanks(1)   Quote steve(ill) Quote  Post ReplyReply Direct Link To This Post Posted: 13 hours 35 minutes ago at 6:43pm
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.
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SWPennTom View Drop Down
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Joined: 06 May 2024
Location: Export, PA
Points: 7 		Post Options Post Options   Thanks (0) Thanks(0)   Quote SWPennTom Quote  Post ReplyReply Direct Link To This Post Posted: 10 hours 30 minutes ago at 9:48pm
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. 
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