Farm Equipment - D10 D12 hyd controls leak?

Print Page | Close Window

D10 D12 hyd controls leak?

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=16631
Printed Date: 05 Feb 2025 at 6:41am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D10 D12 hyd controls leak?

Posted By: Tracy Martin TN
Subject: D10 D12 hyd controls leak?
Date Posted: 15 Aug 2010 at 7:27pm

What would cause the valve to leak out the back assembly when lift is raised? Are parts available to rebuild a valve assembly? Thanks Tracy Martin

Replies:

Posted By: Joe/NC
Date Posted: 15 Aug 2010 at 8:48pm

Tracy, I know you are pretty good mechanic on the AC tractors, but have you checked to see if it is just loose? Sometimes the simple things get overlooked. Also, check your messages.

Posted By: Tracy Martin TN
Date Posted: 15 Aug 2010 at 10:04pm

Joe, There are leaks that are loose. This one seems internal to leak out the little weep hole in end of plunger assembly.A couple of lines have seen better days. Thought someone may have already been down this road. Thanks Tracy Martin

Posted By: Larry Miller
Date Posted: 15 Aug 2010 at 10:08pm

Tracy - I think there is a small hole in the back of that assembly to avoid vacuum or pressure. O rings will leak and move oil out that hole. Short answer - O ring replacement. Be careful and clean - springs and small balls will shoot out if you just pull the assembly. Now I put a shop rag over it when pulling out of casting after learning that lesson.

-------------
I used to be young and stupid, now I am not young anymore.

Posted By: Cary(KY)
Date Posted: 16 Aug 2010 at 6:55am

Mine had that same leak and replacing the o-rings internally fixed it.

Cary

Posted By: Dusty MI
Date Posted: 16 Aug 2010 at 8:12am

Tracy thinks for opening the subject.

I have a D-10 series III with 3 point. The 3 point will hot lift. The remounts work.

Anyone worked on one of these?

Dusty

-------------
917 H, '48 G, '65 D-10 series III "Allis Express"

Posted By: Tracy Martin TN
Date Posted: 16 Aug 2010 at 8:54am

Dusty, Just trying to work out some kinks. Thanks also. Tracy Martin

Posted By: Joe/NC
Date Posted: 16 Aug 2010 at 3:26pm

Tracy, I remember Jim telling me about the springs and balls flying everywhere too. The book shows them in the cut-away.