Sealing 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=35967
Printed Date: 02 Oct 2025 at 5:30pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Sealing Hydraulic Leak
Posted By: JCSinPITTS,PA
Subject: Sealing Hydraulic Leak
Date Posted: 23 Aug 2011 at 7:09am
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I never use the coupling under the seat and it leaks everytime I use the system, I played with the ball inside and jiggled it around and sprayed brake cleaner in there hoping some dirt was under it but no luck. So I deciced to cap it off and bought a cap and screwed it on but it leaked, so i added some permatex and it leaks, so i added some cork and rubber inner tube and it leaks, how do i seal this off since i dont plan on using it?
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Replies:
Posted By: CTuckerNWIL
Date Posted: 23 Aug 2011 at 7:22am
Take it off and cap the line or replace the coupling with a new one. There is no way of sealing a leak with 3500 psi on the back side without correcting the original problem.
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Lena 1935 WC12xxx, Willie 1951 CA6xx Dad bought new, 1954WD45 PS, 1960 D17 NF
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Posted By: stray
Date Posted: 23 Aug 2011 at 8:50pm
If you aren't going to use the coupler I would take it off and get a Hydraulic pipe cap and use thread sealant on it not teflon tape.
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1969 190XT series 3
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Posted By: MACK
Date Posted: 23 Aug 2011 at 9:23pm
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Put red loctite on threads screw cap on let it set over night. MACK
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Posted By: Coke-in-MN
Date Posted: 23 Aug 2011 at 10:45pm
If it is a female coupling , put a male coupling into it with a cap/plug in it and it should be sealed. as long as the O ring is good no leak should be there .
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Life lesson: If you’re being chased by a lion, you’re on a horse, to the left of you is a giraffe and on the right is a unicorn, what do you do? You stop drinking and get off the carousel.
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Posted By: Lonn
Date Posted: 24 Aug 2011 at 5:41am
Is the nipple coming out of the valve cracked?
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