Farm Equipment - WD HYDRAULICS PROBLEM???

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WD HYDRAULICS PROBLEM???

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=50181
Printed Date: 21 Aug 2025 at 11:58pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: WD HYDRAULICS PROBLEM???

Posted By: Geppy
Subject: WD HYDRAULICS PROBLEM???
Date Posted: 07 May 2012 at 8:29am

I just brought out my new to me WD yesterday to do some field work, after raising and lowering the 3-pt hitch I hooked on to my plow and BAM the hydraulics wouldn't lower. It raised all the way up and stuck, I had to crack open the line at one of the lifting cylinders and it went down. I did this a few times and it still won't lower. Any ideas what I can do to fix this? Oh ya it has new hydraulic fluid too.

Replies:

Posted By: MACK
Date Posted: 07 May 2012 at 10:04pm

Control valve in pump is stuck. Pump needs torn down valves polioshed and every thing cleaned up. MACK

Posted By: Geppy
Date Posted: 08 May 2012 at 4:20am

How do I polish them Mack?

Posted By: MACK
Date Posted: 08 May 2012 at 6:37am

Use some fine laping compound. Chuck the spool in lathe or drill and lap spool to outer body. Some times a check spring will break and get in valve. MACK

Posted By: CTuckerNWIL
Date Posted: 08 May 2012 at 7:01am

I would screw the volume control screw all the way in and out a few times with the arms up and weight on them. It is on the front of the hydraulic unit.

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