Farm Equipment - 1938 allis b

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1938 allis 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=210576
Printed Date: 31 Mar 2026 at 2:48am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 1938 allis b

Posted By: rtomlinson
Subject: 1938 allis b
Date Posted: 30 Mar 2026 at 5:24pm

How do U remove throw out bearing cover
On PTO I can not locate fill & drain plug to put a new cup of oil in.
For air cleaner should U just submerged the entire canister

Thanks

Replies:

Posted By: steve(ill)
Date Posted: 30 Mar 2026 at 5:58pm

the tin cover under the clutch just prys off.. Couple small fingers WEDGE it in...

the transmission, differential and PTO are one big housing.. 3 drain plugs on the bottom, but only ONE FILL PLUG... like a 1 inch pipe plug by your left foot on the side of the transmission..fill to the bottom thread... about 7-8 quarts of UTF or 20wt oil.. ... if you dont have hydraulics, its POSSIBLE that the housing has GEAR LUBE in it.. If your changing the oil, it would be better to have a lighter weight oil to get up to the upper shaft bearings..

air cleaner cup should be about half full... there should be a couple marks on the cup.. or there is a center stand tube welded into the cup.. fill it up to the two SLOSH holes... that keeps the oil from sloshing around when you go up and down a hill.

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Like them all, but love the "B"s.

Posted By: steve(ill)
Date Posted: 30 Mar 2026 at 6:03pm

https://www.youtube.com/watch?v=M0tD-eRXlhk%20" rel="nofollow - https://www.youtube.com/watch?v=M0tD-eRXlhk

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Like them all, but love the "B"s.

Posted By: rtomlinson
Date Posted: 30 Mar 2026 at 6:54pm

Thanks,
I get the 3 drain plugs, when I drain the tran. Got lots of water when diff. Drain more oil & water, PTO got nothing I stuck scredriver I PTO hole just got brown gunk on long scredriver.
I empty the port tran.first
I will fill with D.F
& Let sit maybe drive 10 min.
But some where I read U should drain the pto on the housing somewhere. If I had that much water in tran etc. I thought I should find & drain U only add a cup of oil if U find it.
Thanks

Posted By: rtomlinson
Date Posted: 30 Mar 2026 at 6:56pm

I do have hyd & pulluy

Posted By: steve(ill)
Date Posted: 30 Mar 2026 at 8:04pm

the gasket between the differential and the PTO housing sticks up a couple inches... When the tractor is running DOWN HILL, this gasket traps a quart of oil in the hydraulic / PTO housing so you can still run the hydraulics... iF you drain the trans then the differential, then the PTO, you will only get a couple cups or a quart from the PTO area...

the water in the transmission came from leakage around the rubber boot /seal on the shift lever.. It will sink to the bottom and possibly never get into the hydraulic PTO area... Your OK... just flush and refill..

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Like them all, but love the "B"s.

Posted By: rtomlinson
Date Posted: 30 Mar 2026 at 9:28pm

Thanks for your time & knowledge
It runs, just a couple more things to do before first ride.
I bought it 12/23/25
Brakes might be another issue?? I shopping for used rear tires.
Thanks again