Farm Equipment - 6080 with poor hydraulics

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6080 with poor hydraulics

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=209751
Printed Date: 04 Mar 2026 at 2:09am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 6080 with poor hydraulics

Posted By: victoryallis
Subject: 6080 with poor hydraulics
Date Posted: 17 Jan 2026 at 3:45pm

One of our 6080’s has very poor hydraulics. Steers perfectly fine. Had it on the discbine this summer and it would struggle to lift it most of the time but not all the time. Fluid level is good and filters are new. 3pt got lowered this fall and couldn’t lift it back up till randomly one day it raised. Put gauge on the remotes and tested after start up. We’ve switched remotes around but in the end I think problem shows up with both. When I find my notes on pressures I’ll update post.

Found my notes: Tested at start up from sitting a couple days 2200-2300 psi but after running a bit dropped down to a max of 1300.

Where does a person go next? Someone suggested too much play in the rod to the valve stack but doesn’t look bad.

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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760

Replies:

Posted By: DrAllis
Date Posted: 18 Jan 2026 at 7:31am

Start by rebuilding or replacing the relief valve on the remote spools valve stack. This relief valve should be identical to what we used on series 4 D-17's-170-200's etc. They are still Husco brand valves. Knowing that the good relief valve is now in that 2200 psi range, if the hydraulics still don't perform as they should, there is clearly a problem inside the lift section of the hydraulic pump. This assumes clean filters and full of oil in the rear end.