Early D17 power steering
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=202511
Printed Date: 23 Nov 2024 at 5:29pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Early D17 power steering
Posted By: darrel in ND
Subject: Early D17 power steering
Date Posted: 31 Jul 2024 at 2:05pm
Friend of mine has an early D17. Mowing hay this morning, he said that the power steering quit working. Checked the fluid, it's above the gear. Said he pulled lines off, and it appeared to have pressure. But that's not a real accurate indicator, because amount of pressure is not known. I told him to jack the front end up, see how it steers then; check for like binding somewhere. Didn't know what else to tell him, as I have never worked D series power steering. He said that it is mostly just steering real hard, but once in a while it just gets jumpy, or intermittently working. Where's the next step he should take?
Thanks, Darrel
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Replies:
Posted By: darrel in ND
Date Posted: 31 Jul 2024 at 2:14pm
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My bad, didn't see Ricky Ky's thread until now. Kind of same thing. Darrel
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Posted By: darrel in ND
Date Posted: 31 Jul 2024 at 3:06pm
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So, my buddy just got back to me again after he did some more checking. He said that it steers hard to the left, and steers normally to the right. So taking information from the other thread on D17 power steering, I would seem that he has sheared a pin in the steering rack. Can anyone help us out with how in-depth of a fix that is? Thanks, Darrel
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Posted By: DrAllis
Date Posted: 31 Jul 2024 at 3:10pm
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Narrow front or wide front?? If a wide front, he should make sure the swing arm that the tie rods connect to underneath is free and not dragging on the front axle. If it seems to "power steer" to the right and hard back to the left, the steering rack pin has sheared off inside the front support. If both of these things are OK, I would yank off the pump and tear it down. There could be a woodruff key sheared off on the pump gears, which would allow it to make oil flow, but freely flow and never build any PRESSURE, which is required for power steering. If he wants to somehow get a 2,000 psi gauge plumbed into the pressure line from the pump to the steering control valve, that would be best to verify things, but I can have a pump off and stripped down in 60 minutes and it would take longer than that to make a pressure gauge capable test line.
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Posted By: DrAllis
Date Posted: 31 Jul 2024 at 3:12pm
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Rack pin sheared requires removing the radiator and then the front support out from under the radiator. Pull the steering hydraulic cylinder off and you'll see what happened.
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Posted By: DrAllis
Date Posted: 31 Jul 2024 at 3:23pm
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The rack must be "timed" when reassembling so it steers equal distances full right and full left.
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Posted By: darrel in ND
Date Posted: 31 Jul 2024 at 3:26pm
Posted By: AC720Man
Date Posted: 31 Jul 2024 at 4:37pm
I rebuilt the PS in my narrow front. New seals in the bolster, new gears, seals, pins in the PS pump. If it’s an early model driving off the generator make sure the output drive of the generator is in good shape as well as the pump. The connecting collar between the two is an issue. Over time they slip when worn. The collar/coupler is a shocking $95 part but it’s required if you want the PS to perform correctly. This will cause the issue he is having. That would be the first thing I would look for. Not that hard of a job to separate and inspect. My PS works well after I rebuilt it, just wear parts in these 60 plus year old girls starting to go bad.
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1968 B-208, 1976 720 (2 of them)Danco brush hog, single bottom plow,52" snow thrower, belly mower,rear tine tiller, rear blade, front blade, 57"sickle bar,1983 917 hydro, 1968 7hp sno-bee, 1968 190XTD
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