Farm Equipment - WD45 hyd pump ?

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WD45 hyd 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=37394
Printed Date: 09 Sep 2025 at 9:42am
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Topic: WD45 hyd pump ?

Posted By: Dave in il
Subject: WD45 hyd pump ?
Date Posted: 16 Sep 2011 at 11:52pm

The lift arms on my WD45 lift and lower fine without a load on them, but with my 3 bottom SC plow it will barely lift the plow off the ground, I mean the bottoms are still skimming the ground. The pump is set the way it says in the plow manual and on the battery box decal, and it is full of oil. It used to lift this plow easily but I haven't had it on the tractor for a few years.

We tried lifting the plow with the forklift and the tractor tries to hold it up but the plow slowly falls to the position not quite on the ground. If you move the lever down the plow drops and when you put it back up it tries to lift but it barely moves it.

I have a pump off of a WD that was working fine should I change the pump from the 45 or is there something else I should try first?

Replies:

Posted By: MACK
Date Posted: 17 Sep 2011 at 7:53am

Sounds like it needs some shims in unloading valve. While it is apart put new orings and check ball springs in.

Put a 5000lb gauge in remote cuppler and check pressure. MACK