Farm Equipment - 7020 no start

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7020 no start

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=193481
Printed Date: 05 May 2025 at 9:50am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7020 no start

Posted By: Wbenchfarms
Subject: 7020 no start
Date Posted: 13 Feb 2023 at 12:46pm

7020 Allis. Has always been hard starting, even when it's warm needs a little shot of starting fluid. Parked it after we were done baling in the fall, and now cannot get it to start. No fire at all. Have had it about 3 years. Previous owner said he had replaced the pump and injectors. Good fuel to the pump, but just does not seem like it's getting a lot of pressure to the injector. Anyone have a good place to ship a pump to get looked at, or have a good used one laying around? The one that was installed has an electric shut-off solenoid. Open for any suggestions on what to look for next.

Replies:

Posted By: darrel in ND
Date Posted: 13 Feb 2023 at 1:09pm

My 8070 (with 7580 engine, thus a roosa pump) was a hard starter. Evidently the starter was slowly faltering, so didn't really notice it. Starter finally went out, and we got it rebuilt. Spun er over very noticeably faster, no more hard starting.
Darrel

Posted By: 8070nc
Date Posted: 13 Feb 2023 at 1:36pm

Ed Guenther. Injpumped
On the forum

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1984 80780
1957 D14
DES 300 with 25000 engine
616 tractor

Posted By: injpumpEd
Date Posted: 13 Feb 2023 at 1:55pm

Many times Roosa pumps tend to gum up from sitting if running bio diesel, and it is allowed to sit and age, it doesn't age well. Think of a jug of milk being 6 months old. I rebuild lots of pumps here. That is an M2/L2 pump. It could be made correct for a 7020 when rebuilding.

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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: Wbenchfarms
Date Posted: 13 Feb 2023 at 2:02pm

injpumpEd wrote:

Many times Roosa pumps tend to gum up from sitting if running bio diesel, and it is allowed to sit and age, it doesn't age well. Think of a jug of milk being 6 months old. I rebuild lots of pumps here. That is an M2/L2 pump. It could be made correct for a 7020 when rebuilding.

Would you be interested in taking a look at this pump if I shipped it out? Would like to pick your brain on a few things with it.

325-721-9968