Serious Hydraulic 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=171892
Printed Date: 29 Sep 2025 at 6:48pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Serious Hydraulic leak
Posted By: MB 121
Subject: Serious Hydraulic leak
Date Posted: 10 Jun 2020 at 4:48am
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I have a serious hydraulic fluid leak all cylinders including loader were lathed re packed and don't leak a drop. Brand new lines. I have degreased the entire tractor it appears the leak is towards transmission selector also had hydraulic control hieght block rebuilt new o rings felt dust seals doesn't leak a drop from it either. It will leak while running or not.
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Replies:
Posted By: Gary
Date Posted: 10 Jun 2020 at 5:13am
A little more info would help us help you.
Would assume it is an Allis Tractor you are talking about.
Need to know the Model and year ( or Serial Number ) to begin with.
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Posted By: MB 121
Date Posted: 10 Jun 2020 at 6:27pm
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1953 WD45 don't have serial number on me I can look it up
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Posted By: SteveM C/IL
Date Posted: 11 Jun 2020 at 1:30pm
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Did you put the oring between pump and control valve?
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Posted By: MB 121
Date Posted: 11 Jun 2020 at 4:53pm
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Replaced it when I had control valve rebuilt. Not leaking there it's dry
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Posted By: DrAllis
Date Posted: 11 Jun 2020 at 6:57pm
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"It will leak running or not"...….Leaks what ???? Hydraulic oil??? or transmission/torque tube oil?? You mention transmission selector?? You know a good picture or two would certainly help.
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Posted By: MB 121
Date Posted: 11 Jun 2020 at 7:20pm
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Hydraulic fluid. The main place I see it dripping off is the PTO housing drain plug already replaced PTO gears housing seals and gaskets. PTO was 90 wieght by I&T shop manual this is hydraulic fluid. Tried uploading photo says to big not sure if I'm doing something wrong there or what.
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Posted By: DrAllis
Date Posted: 11 Jun 2020 at 7:45pm
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If you had the hydraulic pump off the tractor, I'll bet you've damaged the gasket reinstalling the pump.
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Posted By: MB 121
Date Posted: 12 Jun 2020 at 4:42am
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Pump hasn't been off it is strong and runs well mostly everything I've put on it it lifts only thing I found it won't pick up is a large round bale with a spear.
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Posted By: Bret (OH)
Date Posted: 12 Jun 2020 at 6:09am
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See https://www.allischalmers.com/forum/pictures_topic168921.html" rel="nofollow - https://www.allischalmers.com/forum/pictures_topic168921.html for instructions on photo posting.
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