Farm Equipment - 7580 fuel issues

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7580 fuel issues

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=172142
Printed Date: 30 Aug 2025 at 3:13am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7580 fuel issues

Posted By: Joe Goodwill
Subject: 7580 fuel issues
Date Posted: 18 Jun 2020 at 8:16pm

I have been left with a 7580 to resurrect. It’s been sitting for a couple of years. Turn on the key, electric fuel pump runs continuously, open bleed valve before injection pump and fuel shoots all over. Crank engine no fire no smoke. Crack injector line on pump and crank engine no fuel appears. ??? Looking for clues🤦🏼‍♂️

Replies:

Posted By: MACK
Date Posted: 18 Jun 2020 at 9:07pm

Metering valve stuck or pumping plungers stuck. Take top off pump and check metering valve. MACK

Posted By: Joe Goodwill
Date Posted: 18 Jun 2020 at 9:12pm

Thanks do I need any special tools, seals or gaskets to take top off and replace?

Posted By: MACK
Date Posted: 18 Jun 2020 at 9:24pm

No, just hope none of the little bolts don't twist off. Don't need to replace, just free it up. If plungers are stuck, that is a rebuild. MACK

Posted By: Joe Goodwill
Date Posted: 18 Jun 2020 at 9:46pm

Hopefully the easy one! Thanks