Farm Equipment - 6080 hydraulic pump prime

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6080 hydraulic pump prime

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=47983
Printed Date: 27 Aug 2025 at 11:38pm
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Topic: 6080 hydraulic pump prime

Posted By: rowtooe
Subject: 6080 hydraulic pump prime
Date Posted: 26 Mar 2012 at 6:44pm

Allis Chalmers 6080. When I shut the tractor off, I loose the prime on the hydraulic pump, no steering or other hydraulics when I restart. I re prime and everything works. What could be causing the loss? The rear end acts as the tank for the fluid. Please let me know if any of you have had the same problem. Thanks Pete

Replies:

Posted By: Hurst
Date Posted: 26 Mar 2012 at 7:53pm

Check the suction line for leaks. It can lose its prime without visable leaks, as the leak can be small enough that air will go in but fluid won't go out. Not completely familiar with the 6080s suction line routing, but if it has any large hose connections or connections with doughnut gaskets, that would be my first place to look.

Hurst

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1979 Allis Chalmers 7000
5800 Hours

Posted By: MACK
Date Posted: 26 Mar 2012 at 10:21pm

Front seal in pump needs replaced. MACK

Posted By: rowtooe
Date Posted: 27 Mar 2012 at 4:34am

Mack, do you mean the gasket where the pump mounts to the tractor? Or internally? Thanks

Pete

Posted By: MACK
Date Posted: 27 Mar 2012 at 6:27am

The shaft seal in pump drive shaft. MACK

Posted By: rowtooe
Date Posted: 27 Mar 2012 at 2:54pm

Thanks Mack, I will give that a try, It makes sense.

Pete