Farm Equipment - B lift pump

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B lift 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=143921
Printed Date: 08 Oct 2025 at 10:37pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: B lift pump

Posted By: DaveWisc.
Subject: B lift pump
Date Posted: 28 Oct 2017 at 9:17pm

I need some help. I have overhauled the rearend in my B so I replaced the oil in the tranny with 821 and I cleaned the pump to when I did this. So here is my problem, I mounted a plow on this tractor and sometimes it will lift it and sometimes it will not without me helping it. When it does come up then if I want to I can just push it down again with the pump running. If I put the lift lever in the neutral position then the plow goes back down. Yes I have the pulley running as this runs the pump. So does anyone have a kit to rebuild the pump and fix the check valve or do I just take it out and clean it again.I did plow with it last Sunday and it did pull the plow nice and it worked good. Thanks for any help. Dave

Replies:

Posted By: Bill Long
Date Posted: 29 Oct 2017 at 10:02pm

Dave, There are some posts on this site showing the B-C hyd pump exploded. One of the nuts on the top hold a spring and a hold valve. You may be able to take off the top - keep it in diesel oil - and reinstall it and before closing up give it a tap with a punch. May seat the valve. Be sure to clean the area again.

If that does not work give Sandy Lake a Call. Their contact information is on this site. They are most helpful and can supply you with parts or help. Also, you could send them the pump for an overhaul.

Like I said before, when we sold them in the 40's and 50's the B-C pump was so bulletproof that we never had any trouble. That was some 70 years ago. Usage can cause problems.

Also, you may want to check e-bay. There always seems like there is someone parting out a B or C and there may be a working pump available. To my recollection it usually had a good price.

Good Luck!

Bill Long

Posted By: Bill Long
Date Posted: 29 Oct 2017 at 10:10pm

Dave, I just went to e-bay and noted there are two PTO's with Hydrallic pumps. Price $ 200 or $ 250 plus about $ 80 for shipping. May be the easiest way to go. Would give you a parts pump too.

You may ask if the PTO is 1 3/8" rather that the 1 1/8" original model.

Let me know how it works out.

Good Luck!

Bill Long