Farm Equipment - 7580 HELP

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7580 HELP

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=44357
Printed Date: 10 Sep 2025 at 10:19pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7580 HELP

Posted By: surplus_salvage
Subject: 7580 HELP
Date Posted: 23 Jan 2012 at 6:52pm

I've got a 7580 that I'm having trouble with and looking some help. The pto works fine until the oil heats up and then it almost stops. Anyone had experience like this? I'm thinking that since it is a wet system that oil is passing by somewhere, but that's just my thinking. Any help would be appreciated.

Replies:

Posted By: DrAllis
Date Posted: 23 Jan 2012 at 6:55pm

Almost stops with a heavy load on it??? need to be checking pressures to the clutch which the test ports are right back there above the PTO shield and to the right on the cover to the PTO clutch. If it's really slipping under load, the clutch is surely fried by now....does the PTO shaft stop when out of gear?????

Posted By: surplus_salvage
Date Posted: 24 Jan 2012 at 6:33am

Yes, it really turns slow under load. When out of gear the pto shaft does not completely stop if nothing is coupled to it. You can almost stop it from turning with your hand.