D17 series one lift arm problems. Please help
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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=207261
Printed Date: 18 Jul 2025 at 9:17pm
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Topic: D17 series one lift arm problems. Please help
Posted By: Devin
Subject: D17 series one lift arm problems. Please help
Date Posted: 27 Jun 2025 at 9:46pm
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Hello, working on a family members d17 series 1 and looking for some knowledge. Any time the engine is running the lift arms raise like there's pressure going to them regardless of where the controll lever is set at. The linkage for the traction booster is unhooked and I made sure the rod at the bottom of the tractor is not hanging up and causing troubles. If I shut the tractor off the lift arms will drop but will not while tractor is running. The hydraulic lever will make them raise faster when moved but when it's at the lower setting they still creep up. Wondering if I have a valve leaking by or something else? Any help would be greatly appreciated, thanks!
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Replies:
Posted By: DrAllis
Date Posted: 27 Jun 2025 at 9:51pm
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The Traction Booster rod under the belly MUST BE HOOKED UP and adjust the nuts FORWARD as far as they can go for now. Traction Booster lever must be down/horizontal.
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Posted By: Devin
Date Posted: 27 Jun 2025 at 10:11pm
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I forgot to mention traction booster has been unhooked as long as he's owned the tractor but the lift arm problem started recently and has progressively gotten worse.
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Posted By: DrAllis
Date Posted: 27 Jun 2025 at 10:15pm
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Don't argue. Hook it back up and adjust the nuts FORWARD and then report back if it doesn't work. T.B. lever must be DOWN/HORIZONTAL.
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Posted By: Devin
Date Posted: 27 Jun 2025 at 10:23pm
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No arguing here just trying to give all the info I can. I will do what you recommend first. Thank you!
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Posted By: Devin
Date Posted: 29 Jun 2025 at 3:35pm
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I got everything hooked up and adjusted the nuts on the t.b. forward. No longer raises all the time but the raise/lower is a bit funky. Move the lever to lift and it does nothing till about half way up the travel of the lever then starts raising but will continue to raise until the arms are raised to the top limit. If I move the lever down just one notch from that spot it will lower the lift arms all the way. Basically it seems like it's all or nothing in the travel of one notch on the hydraulic lever and you cannot get the lift arms to stay in any position except for all the way up or all the way down. Thank your for your help on this.
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Posted By: DrAllis
Date Posted: 29 Jun 2025 at 6:06pm
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The short Traction Booster lever (with notches) must remain fully down (horizontal) at ALL TIMES unless you are hooked to a mounted plow or disc. The long LIFT/LOWER lever has three positions: All the way up is RAISE. All the way DOWN (below horizontal) is LOWER. In a pretty large area in the middle is HOLD. If the LIFT/LOWER lever raises and lowers but doesn't hold, you need to first be checking your hydraulic fluid level (right side under fuel tank) and the transmission oil level (to the right of the gearshift). Oil might be transferring between the hyd into the transmission. This means a leaking hyd hose and/or seals on the lift arm cylinder inside the rear end. If the oil levels remain correct, the hold valve on the hydraulic pump has a problem. The pump drops down out of the belly. Proper diagnosis must be done to arrive at a proper fix.
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Posted By: D171958
Date Posted: 30 Jun 2025 at 7:15pm
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Wondering if any one knows where to get the bushings in the lift arm housing on a series one d17
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Posted By: DrAllis
Date Posted: 30 Jun 2025 at 8:30pm
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70227788 is the bushing p/n and it takes four of them. 70227790 is the Oring p/n and it takes two of them. I have no idea if an AGCO dealer can get them or not, but that is the FIRST place you would check. If they are no longer available, you'll have to remove the lift arm housing, carefully remove one bushing for a pattern and then try and track them down or have someone make four of them.
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Posted By: D171958
Date Posted: 30 Jun 2025 at 9:43pm
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Ya I checked with ago they are discontinued and I have the bushings out might be regretting taking them out.
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Posted By: DrAllis
Date Posted: 30 Jun 2025 at 10:12pm
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We cannot assume all parts are still available for these old tractors. So, with that in mind, always have a plan before destroying /replacing any old parts.
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