Farm Equipment - D19 Lift arms wont stay up

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D19 Lift arms wont stay up

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=212671
Printed Date: 01 Nov 2026 at 9:43am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: D19 Lift arms wont stay up

Posted By: Buddy2366
Subject: D19 Lift arms wont stay up
Date Posted: 01 Nov 2026 at 8:00am

D19 gas, serial#15090, lift arms raise plow, as soon as valve is returned to hold posttion, lift arms drop. I removed 4 bolts from top and 2 from bottom of valve stack and removed and checked ball and seat/spring. O ring around assymbly looked ok. Did not detect visually any obstruction/foreign material under ball/seat. Cleaned with carb cleaner. re-installed valve stack, same result. Where do I look from here?