Injector 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=168894
Printed Date: 29 Aug 2025 at 11:22am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Injector leak
Posted By: milomilo
Subject: Injector leak
Date Posted: 06 Mar 2020 at 7:43pm
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My 1986 190XT has #2 cylinder injector leaking fuel at the fuel line connection at the top of the injector. The fuel line nut seemed a little loose, so tightened it about 1/8th of a turn and still leaks. Is the fuel line nut just a metal to metal seal or is there an o ring under the nut? ------------- Chris (WY) |
Replies:
Posted By: DrAllis
Date Posted: 06 Mar 2020 at 8:00pm
| There's a rubber sleeve under the nut the squashes out to seal.. |
Posted By: DougG
Date Posted: 06 Mar 2020 at 8:00pm
| Theres a rubber O ring in that cap. they detieroate over time and can leak, Agco price is 4.50 @ piece, a common diesel shop price is .30 cents, |
Posted By: milomilo
Date Posted: 06 Mar 2020 at 8:58pm
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The guy I bought the tractor from did tell me an injector was leaking and the sale came with a bag of o rings for the injectors. Seems this should be an easy fix. Thanks all for the info.
 ------------- Chris (WY) |
Posted By: milomilo
Date Posted: 07 Mar 2020 at 6:48pm
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My comment about an easy fix was a bit premature. Expected the o rings to be pretty hard, but took an hour to get one out. It came out in tiny pieces. Used an o ring pointed seal remover. Is there some trick to getting them out a bit faster than an hour each? ------------- Chris (WY) |
Posted By: milomilo
Date Posted: 07 Mar 2020 at 6:55pm
I must not have used the right search lingo. Do you have a link or a P/N?
------------- Chris (WY) |
DougG wrote:Posted By: Lynn Marshall
Date Posted: 08 Mar 2020 at 8:58am
| The seal in the return line nut is a rubber sleeve, not an oring. The 190 has a flare on those line ends that won't let the nut slide off. Later series of engines didn't have the flare (not really needed) and you could slide the nut off and remove the old sleeve easily. I usually just burn them. Once the rubber catches fire,it comes out quite easily. You could also file or grind the flare to allow the nut to come off. |
Posted By: milomilo
Date Posted: 08 Mar 2020 at 9:29am
Do you have a P/N for the sleeves? ------------- Chris (WY) |
Posted By: Alvin M
Date Posted: 08 Mar 2020 at 9:47am
| Agco Part # 70917806 I hold Sleeve With Ice Pick Then Turn Nut It Will Thread Out |
Posted By: milomilo
Date Posted: 08 Mar 2020 at 8:59pm
Thanks for the tip. I will try that tomorrow. ------------- Chris (WY) |
Posted By: milomilo
Date Posted: 09 Mar 2020 at 9:18am
Any tips for installing the new grommets over the tube flare? ------------- Chris (WY) |
Posted By: Alvin M
Date Posted: 09 Mar 2020 at 9:48am
| I Heat Them With Hot water Or Heat Gun Then Lay Them On Work Bench Then Push Tube Down Into Them |
Posted By: DrAllis
Date Posted: 09 Mar 2020 at 10:16am
| Seems like some are harder/stiffer than others. Sometimes I've used a tapered punch to stretch them out a little and then slide them on. Hot water for sure will make them more pliable. |
Posted By: milomilo
Date Posted: 13 Mar 2020 at 7:51pm
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Used a small propane torch and melted out the grommets. New grommets are on the way. ------------- Chris (WY) |
Posted By: milomilo
Date Posted: 19 Mar 2020 at 8:37pm
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Grommets installed no leaks. Thanks to all who provided instructions. ------------- Chris (WY) |