Farm Equipment - leaking injector on 7020

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leaking injector on 7020

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=188096
Printed Date: 19 Jul 2025 at 3:27am
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Topic: leaking injector on 7020

Posted By: Magnuson_2007
Subject: leaking injector on 7020
Date Posted: 06 May 2022 at 2:04pm

My 7020 has started leaking antifreeze/coolant from around one of the injectors. Ive tried tightening the two bolts holding it in with no change. Wondering if the olives at the top of the injector work as a seal and a dust cover?
The tractor has no white smoke. No overheating. No milky engine oil but it does bellow out black smoke if under pressure? Wonderiging if its a bad injector or head gasket Or the pre cups?
Any help is much appreciated

Replies:

Posted By: SteveM C/IL
Date Posted: 06 May 2022 at 2:32pm

7020's have swedged copper sleeve for injector hole surrounded by antifreeze...say you have a sick one.

Posted By: Magnuson_2007
Date Posted: 06 May 2022 at 2:40pm

yeah I was thinking its the sleeve. Is it a big job to change them?

Posted By: injpumpEd
Date Posted: 06 May 2022 at 2:47pm

head removal. I'd be trying some ceramic seal to seal it up.

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210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers!

Posted By: Magnuson_2007
Date Posted: 06 May 2022 at 5:11pm

I will take a look and see what I find in there. Thanks for the help