Farm Equipment - 7020 injectors

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7020 injectors

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=195991
Printed Date: 12 Nov 2025 at 10:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7020 injectors

Posted By: BillinAlberta
Subject: 7020 injectors
Date Posted: 03 Jul 2023 at 3:08pm

Well my project 7020 has developed a knock that is intermittent.

Cracking the fuel lines with the engine running showed up 2 cylinders

with no change leading me to believe that the injectors need work.

I have never been into the fuel systems on an Allis 301.

Would it be reasonable to replace all the injectors with rebuilt units

first and see how it goes?

Are there any rebuilders that have a good reputation that are reasonable

cost and ship to Canada?

Replies:

Posted By: Lynn Marshall
Date Posted: 03 Jul 2023 at 3:48pm

While the injectors may very well need attention, the problem is getting them removed without damaging the copper tubes they sit in. Regardless of how difficult it is to remove them, I would definitely have new tips installed on your injectors or someone else's rebuilt ones.

Posted By: BillinAlberta
Date Posted: 03 Jul 2023 at 5:48pm

I am thinking a rebuilt injector assembly would have new tips .

Posted By: Ron(AB)
Date Posted: 03 Jul 2023 at 6:01pm

Any local diesel shop will rebuild them. eg. Camrose diesel

The challenge is if the copper tubes come out with the injectors. Then you have to remove the head and install a new copper tube(s). Makes a small job a lot bigger...

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405, 7000, 7050, 8050, 8070, L3, 2300 & 2600 disk

Posted By: BillinAlberta
Date Posted: 03 Jul 2023 at 6:10pm

Great news about the copper tubes. It is a long ways to Camrose from here. I'll see who I can find.If I have to pull the head I might bite the bullet and redo the whole engine as a winter project.

Posted By: MACK
Date Posted: 03 Jul 2023 at 9:28pm

Don't twist the injectors to get them loose. Best to soke them good with WD40 and try to pull them straight up. MACK

Posted By: Tim NH
Date Posted: 04 Jul 2023 at 8:18am

I pulled the injectors on my 7000 using two pry bars for equal pressure after soaking like Mack said. Sent them to injection pump Ed who's on here. Tim

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1950 WD 1959 D14 1955 WD45 1976 7000 B 207

Posted By: BillinAlberta
Date Posted: 04 Jul 2023 at 11:01pm

All 6 came out easy and the copper liners stayed in place.

I also found a shop in the 'toon that will work on them.

Posted By: DrAllis
Date Posted: 05 Jul 2023 at 6:31am

You sir, are a lucky man !! Carry on ....

Posted By: Amos
Date Posted: 06 Jul 2023 at 7:40pm

It happened once in my life

its all the other times i seem to remember more vividly....

I have been putting copper anti seize on the ones I install for a few years, have not had trouble taking any of them out, but they haven't been in for decades yet either

Posted By: BillinAlberta
Date Posted: 16 Jul 2023 at 9:53am

So I pick up the rebuilt injectors tomorrow.

I can lightly coat them with anti seize .

Any hints for reinstallation?