Farm Equipment - Recommendation needed

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Recommendation needed

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=210074
Printed Date: 16 Feb 2026 at 2:23am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: Recommendation needed

Posted By: Rickjr
Subject: Recommendation needed
Date Posted: 15 Feb 2026 at 7:51pm

I'm seeking diagnostic advice for a 190 XT Power Director issue. The tractor is currently only functional in its odd-numbered gears, and the PD lever has no effect on ground speed in any position.

All external linkages are verified to be moving correctly. I have previously encountered debris in the hydraulic system, so I am concerned about a similar blockage or a mechanical failure in the range transmission. Are there specific valves or internal screens you recommend checking before I consider a split?

Replies:

Posted By: DrAllis
Date Posted: 15 Feb 2026 at 9:11pm

Start by pressure testing the P.D. clutch itself!!! Good/decent pressure and no-go means an internal issue, requiring a split. Should be two 1/8" pipe plugs on the side of the PD valve. Dozens and dozens of times when I remove the PD valve and its cover plate I can visually see problems with the PD clutch by looking at the clutch disc/separator plate spacing. A quick air check sometimes helps too. Sounds like a split is needed but without pressure testing first and then visually inspecting from the side, you are totally guessing.