Farm Equipment - 7080 Hydraulic Issues

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7080 Hydraulic 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=141150
Printed Date: 01 Jan 2026 at 12:03am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 7080 Hydraulic Issues

Posted By: dieselfumes
Subject: 7080 Hydraulic Issues
Date Posted: 06 Aug 2017 at 11:54am

I have a 1980 model 7080 Allis Chalmers. The hydraulics have been weak since I bought the tractor, but recently, it has gotten worse. When the tractor is driven up hill, all the hydraulics stop working. There is no power steering, no brakes and the lift will not work. The hydraulic fluid and filters have all been changed within the last 100 hours. Any thoughts on what this might be?

Replies:

Posted By: DrAllis
Date Posted: 06 Aug 2017 at 1:23pm

If the tractor continues to keep on moving up the hill, it sounds to me like your hydraulic oil level is EXTREMELY LOW ON FLUID, like maybe 12 gallons low on oil. Now, where are you checking the hydraulic oil level??

Posted By: dieselfumes
Date Posted: 06 Aug 2017 at 10:39pm

Checking the site gauge at the rear of the tractor. I have actually screwed out the top site gauge and added until oil runs out.

Posted By: MACK
Date Posted: 06 Aug 2017 at 10:57pm

Did you wait for oil to level before you put sight glass back in? Could still be 5 gal. Low. No reason to quit going up hill other than low on oil. MACK

Posted By: shameless dude
Date Posted: 07 Aug 2017 at 1:39am

and have the 3-pt in the down position when adding/checking oil level

Posted By: Tbone95
Date Posted: 07 Aug 2017 at 6:59am

3pt lowered is true, but it wouldn't be so significant to stop tractor.