wd hydralic pressure low
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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=137971
Printed Date: 11 Sep 2025 at 2:11am
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Topic: wd hydralic pressure low
Posted By: HudCo
Subject: wd hydralic pressure low
Date Posted: 01 May 2017 at 9:51am
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hyd . pressure was only getting around 1500 psi last summer raking hay i have not looked in my service manual yet or got on the parts look up . what do i need to repair ? i have a gauge mounted on the port were the traction booster line gauge would go was watching it when i was haveing a hard time opening the 14 wheel hay rake . not running out of oil just low pressure
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Replies:
Posted By: Allis dave
Date Posted: 01 May 2017 at 10:12am
You'll get a better pressure reading if you hook a gauge up to the remote.
If that's your actual pressure, you'll have to pull the pump off and reseal it at minimum. Could be that some check valve spring springs are broken. I had a bout 700PSI from my pump. pulled it and 2 spring were broke. If after all that you still have low pressure, you can start adding shims to the unload valve in the pump.
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Posted By: Butch(OH)
Date Posted: 01 May 2017 at 10:16am
AGCO used to sell a couple kits that between them had the bulk of the wearing parts, seals and gaskets included. Once rebuilt you reinstall the pump and check the pressure and then remove it again to shim the relief valve. Been many years since I have seen one that came close to spec for pressure, they all need more shims.
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Posted By: Ted J
Date Posted: 01 May 2017 at 10:20am
WHAT tractor is this on?
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"Allis-Express"
19?? WC / 1941 C / 1952 CA / 1956 WD45 / 1957 WD45 / 1958 D-17
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Posted By: HudCo
Date Posted: 01 May 2017 at 5:47pm
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52 wd. what kit Numbers should i be looking at? i do have a pump off of a 49wd on the shelf but i never seen it run
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Posted By: Butch(OH)
Date Posted: 01 May 2017 at 7:33pm
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Go to AGCO parts books and they are listed at the bottom if the hydraulic pump section.
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