Farm Equipment - Lift arms settleing on D15

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Lift arms settleing on D15

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Category: Allis Chalmers
Forum Name: Farm Equipment
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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=20304
Printed Date: 09 Feb 2025 at 7:01pm
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Topic: Lift arms settleing on D15

Posted By: darrel in ND
Subject: Lift arms settleing on D15
Date Posted: 03 Nov 2010 at 4:36pm

This question has probably been asked a hundred times on various tractors, but here goes again for the 101th time. What is the most likely fix for lift arms settleing on a D 15? Had a sickle mower hooked up to it with a single acting cylinder for the sickle lift, and that settled as well, only takes about 30 seconds to settle, Thanks in advance, Darrel

Replies:

Posted By: Tracy Martin TN
Date Posted: 03 Nov 2010 at 6:25pm

Could be valve not closing properly.Does your tranny oil overflow at all? If so, it will be cylinder leaking or hose. HTH Tracy Martin

Posted By: Stan R
Date Posted: 03 Nov 2010 at 6:32pm

Leaking hose inside the rear end was our problem with the D15.

Posted By: darrel in ND
Date Posted: 03 Nov 2010 at 9:02pm

Thanks guys. I think I'll check fluids in the morning, and I am sure that I'll find the hydraulic oil low, and the tranny or rear end oil over full, because I topped off the hydraulics today, and and it wasn't long before the arms and the sickle wouldn't raise any more, as if no hydraulic oil. Next question; how to find a leaky (hopefully just a hose) in the rear end? Darrel

Posted By: Tracy Martin TN
Date Posted: 03 Nov 2010 at 9:37pm

Darrell, Must take off the rockshaft housing. You will need a lift of some kind if you do it yourself without help. Makes it easier with a hoist or cherry picker. I would purchase new packing, new hose and o-ring for cylinder anchor pin, and housing gasket. Not that hard of a job. Just messy. When installing the hose don't twist it while installing it. It may cause it to rub housing or pto shaft. There is a strip made on them to make installation easier by visual inspection. HTH Tracy Martin

Posted By: darrel in ND
Date Posted: 04 Nov 2010 at 7:48am

Thanks, Tracy. One more project to add to the list!! Darrel