Lift arms won't lower - traction boost?
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=142039
Printed Date: 01 Nov 2025 at 8:28pm
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Topic: Lift arms won't lower - traction boost?
Posted By: Jkhill1984
Subject: Lift arms won't lower - traction boost?
Date Posted: 01 Sep 2017 at 9:32am
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I'm in the process of putting a 3 point conversion on my d-17 series 4 and I can't get the lift arms to go down. The FEL works fine so I don't think it's a hydraulic issue. I was actually able to get them to collapse if I put the lift arm lever all the way forward and stood on arms. It raised when the lever was pulled back, but won't go back down on its power. The traction control linkage is completely broken off, just a small piece of it is dangling from the bottom connection. I'm assuming this could be causing some type of a problem. How do I just turn traction boost completely off? I also can't get the traction boost and position control lever to move separate of each other they'll only move in unison like they're stuck together. I also can't read the writing so I don't know which position I should go and what exactly they do in each position. Any help would be appreciated, I'm at a loss.
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Replies:
Posted By: DrAllis
Date Posted: 01 Sep 2017 at 12:22pm
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Traction Booster/Position Control levers should both be forward. Having to stand on the snap-coupler lift arms while holding the Lift/Lower lever clear forward is very NORMAL !! on a series 4, as they will never go down under their own weight. Once you get the lift arms down, start the engine and set the throttle at no more than 1,000 RPM. If the arms come up slowly on their own, you have a T.Boost linkage/plunger issue. If they don't come up at slow engine speed, everything is fine. They probably will come up slowly as the engine speed is increased and this is also normal with cold oil and with snap-coupler hitch.
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Posted By: Joe(TX)
Date Posted: 01 Sep 2017 at 7:55pm
I had the same problem on my 180 and 170. The actuator lever that pushes in the spring loaded plunger on the control valve was frozen up. I had to remove it and free it up on the spacer bushing.
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1970 190XT, 1973 200, 1962 D-19 Diesel, 1979 7010, 1957 WD45, 1950 WD, 1961 D17, Speed Patrol, D14, All crop 66 big bin, 180 diesel, 1970 170 diesel, FP80 forklift. Gleaner A
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