Farm Equipment - 1948 Allis B Water Pump

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1948 Allis B Water Pump

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=140546
Printed Date: 18 Jul 2025 at 6:56pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 1948 Allis B Water Pump

Posted By: Eldon in MN
Subject: 1948 Allis B Water Pump
Date Posted: 18 Jul 2017 at 7:44pm

The water pump on my B Froze up. So I took it off the tractor today. How does one get the pulley off. I am not the most gifted mechanic but can usually get by enough to keep it running. What are the two bolts with nuts sticking out of the pulley. Do I need to remove them or are they for some type of pulley adjustment. Also, from the pictures I am copying can anyone tell me which new water pump to order. When looking at the after market pumps I see several options, some say with sheet metal pulley so say with bypass plug and others with back plate and gasket. If there is a shop I can just send what I have to and they remove the pulley, rebuild the pump and reinstall the pulley and mail back I am good with that also.

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Replies:

Posted By: TMiller/NC
Date Posted: 18 Jul 2017 at 8:39pm

Take the 4 bolts out, pulley should come off with a bump on the center. The 2 bolts w/nuts are to adjust the pulley width, shouldn't have to move them if you have an alternator or generator. Call OK Tractor for new water pump and Jim can answer any questions about different water pumps. Tim

Posted By: Eldon in MN
Date Posted: 18 Jul 2017 at 8:42pm

Will do thank you

Posted By: steve(ill)
Date Posted: 18 Jul 2017 at 8:43pm

when you have the pump off, look at the back and you will see the "plate"... if you don't get a new one, you need to remove the old and will need a new gasket..... the bypass is for the D10-12 tractors--- you can plug that if you get that version..... I have tried to "rebuild" and generally you can buy new for cheaper.... labor is expensive.

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

Posted By: Gerald J.
Date Posted: 18 Jul 2017 at 9:17pm

The shop manual that I have on line for the G, B, C, and CA might help.
http://www.geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf" rel="nofollow - http://www.geraldj.networkiowa.com/Trees/Allis-Chalmers-G-B-C-CA-Service.pdf

Gerald J.

Posted By: Ted in NE-OH
Date Posted: 18 Jul 2017 at 9:57pm

Check e-bay, I purchased a new (clone) water pump for $69. They are not worth rebuilding as requires special tools.

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CA, WD, C, 3 Bs, 2 Gs, WC, I-400, 914