Farm Equipment - 8070 won't start after overhaul.

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8070 won't start after overhaul.

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=53522
Printed Date: 11 Sep 2025 at 12:12pm
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Topic: 8070 won't start after overhaul.

Posted By: acnh210
Subject: 8070 won't start after overhaul.
Date Posted: 13 Jul 2012 at 2:50pm

8070 was just overhauled. pump and injectors were not touched.It will fire and die on ether. have good fuel flow to injectors and plenty of exhaust smoke. going to check timing next. I didn't work on this myself. Just trying to help someone out.

Replies:

Posted By: Cen IA John
Date Posted: 13 Jul 2012 at 3:33pm

Same thing happened many years ago when a Brand X dealer overhauled my 8030 for me to purchase it. Your pump is 180 degrees out of time. Do a 360 turn on the crank and realign the timing marks. Brand X dealer had never heard of such a thing as 180 degrees out or how to fix it. My diesel school and being an AC fan since the D series has kept me up on the GREAT ORANGE tractors.

Posted By: acnh210
Date Posted: 13 Jul 2012 at 3:49pm

we had thought of that and we were retiming it as you were typing. Just fired it up after the 180 turn and it fired right up. Thanks for you help.

Posted By: injpumpEd
Date Posted: 14 Jul 2012 at 9:59am

the model 100 confuses lots of people since it runs at engine speed at the drive, so timing mark can either refer to 1 or 6. Most other pumps run 1/2 engine speed so when timing mark lines up, it is on #1 compression when everything is right.

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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: Amos
Date Posted: 14 Jul 2012 at 1:26pm

Ed, I have always wondered if the 6060/6070/6080 series injection pump ran at 100% crankshaft speed as well? Or is it 50% of the crankshaft speed.

Posted By: injpumpEd
Date Posted: 14 Jul 2012 at 10:30pm

1/2 engine speed. Those tractors use a DB2 roosa pump.

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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!