Farm Equipment - 7080 Fuel Injection question.

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7080 Fuel Injection question.

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=212493
Printed Date: 13 Oct 2026 at 12:32am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7080 Fuel Injection question.

Posted By: twinson
Subject: 7080 Fuel Injection question.
Date Posted: 12 Oct 2026 at 8:48pm

When I pull the 7080's fuel injection pump off to have it rebuilt. How do I time it when it comes back?

Replies:

Posted By: DrAllis
Date Posted: 12 Oct 2026 at 10:01pm

With a flat blade screwdriver, remove the small rectangular timing window on the side of the injection pump. Several ounces of fuel will escape. Turn the engine over until it is at 22 degrees BTDC. At that time TWO timing marks should be aligned. If not turn it one full turn more and there will be two timing marks. Line these up. Remove the pump. Have it repaired and reinstall it the same at 22 degrees BTDC.

Posted By: SteveM C/IL
Date Posted: 12 Oct 2026 at 10:11pm

Make sure you're on compression stroke on # one and turn till the lines inside the window are inline. At this point your degrees advance on the balancer should be aligned with pointer. DON"T ROTATE ENGINE WHILE PUMP IS OFF!!!! You should be able to put rebuilt pump on with timing window lines lined up and be really close to correct timing. Should always check it by backing crank up 45 degrees then fwd till degrees advance and timing window marks jive. Adjust if off. Doc types faster than me. Do as he says.