Farm Equipment - 7000 Hydraulic Pump

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7000 Hydraulic 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=51039
Printed Date: 23 Aug 2025 at 12:26pm
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Topic: 7000 Hydraulic Pump

Posted By: Hurst
Subject: 7000 Hydraulic Pump
Date Posted: 23 May 2012 at 8:59pm

On my black belly 7000 with the HD front end (looks like they use a different pump), what would I be looking at as far as rebuilding the pump if it is getting weak? When warm, I have to have it up around 1800-2000 rpms to get it to lift the wings on our batwing or do anything else that requires decent pressure and flow. The pump doesn't leak externally. It looks like there are the following items that could wear and cause the pump to be weak: wear plates, gear plates, seals, bearings, and gears that can have wear. The traction booster isn't really used much, but seems to work fine, so I am guessing that section of the pump isn't really too bad off. I'd rather rebuild what I have instead of buy new aftermarket, as usually you can rebuild the original to higher quality than aftermarket stuff. It seems like the pump uses a lot of the same internal parts as the earlier dual pumps on the hundred series.

Hurst

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1979 Allis Chalmers 7000
5800 Hours