AC 8050 don't disengage clutch and no trans.brake?
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=172817
Printed Date: 17 Sep 2026 at 9:09pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: AC 8050 don't disengage clutch and no trans.brake?
Posted By: Zmf
Subject: AC 8050 don't disengage clutch and no trans.brake?
Date Posted: 15 Jul 2020 at 1:48am
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Hi everyone When I step on clutch of my 8050 tractor, it does not disengage and keep on moving. It also do not have any trans.brake when I push the paddle all the way down. The mechanical part seems to be doing its job pulling the hydraulic piston out, so what else could be wrong? Thanks for your time
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Replies:
Posted By: MACK
Date Posted: 15 Jul 2020 at 6:25am
| PS or pd? MACK |
Posted By: Zmf
Date Posted: 15 Jul 2020 at 11:36am
| POWER SHIFT |
Posted By: DrAllis
Date Posted: 15 Jul 2020 at 12:08pm
| Broken off piece of fork lodged in the inching spool. |
Posted By: Zmf
Date Posted: 17 Jul 2020 at 3:15am
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Not sure where what and where the inching spool is? Is it inside the wet clutch at the plates? As I mentioned it also does not have trans.brake when the clutch paddle is fully pressed down?
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Posted By: Zmf
Date Posted: 17 Jul 2020 at 3:27am
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It's as if the oil can't go to the dump port nor the trans.brake port. Could something be blocked up and prevent oil from going where it should?
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Posted By: MACK
Date Posted: 17 Jul 2020 at 4:26am
| it is in the valve body on right side behind batteries. MACK |
Posted By: Zmf
Date Posted: 17 Jul 2020 at 3:38pm
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Thanks MACK, I think I know now what Doc is talking about. If I'm understand correct and the spool is the part that moves in/out the valve body, will it not be stuck in one position with the piece of broken off fork? I'm asking, because my spool is not stuck at all. It moves easy and all the way. I have never been inside the valve body, could someone maybe explain how the inching spool directs the oil to clutch/ dump/ transbrake? Or maybe posts or sites or online manuals where i can learn more. All I have is my logic, and that is telling me I have oil presure (tractor moves), but spool can't dump, or direct oil to trans. brake, all though it(spool) is moving. My neighbor told me to press the clutch and then brake hard, while driving, to see if it will loosen up the clutch, but this is not a stuck dry-clutch problem and I'm to afraid to brake my torque converter plate AGAIN!!
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Posted By: DrAllis
Date Posted: 17 Jul 2020 at 7:00pm
| The spool you see is external. It pushes against an internal and separate inching spool. The inside one is the one that is stuck because something has jammed it. |
Posted By: Zmf
Date Posted: 17 Jul 2020 at 9:13pm
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Thanks DOC, I guess it's off with the valve housing then. How much rocket since involved to do that? Thanks again. ANDRE
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Posted By: DrAllis
Date Posted: 18 Jul 2020 at 6:37am
| Not too difficult if you are used to wrenching on farm equipment. You'll probably need two gaskets and a spool oil seal while you have it apart. Everything is aluminum so be careful. A service manual would be helpful. Everything externally must be adjusted right for proper shifting and kickdown and inching. Bolt torques are kind of crucial. |
Posted By: Zmf
Date Posted: 19 Jul 2020 at 12:08am
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Thanks again. Yes wrenching is my thing! I don't use cutlery when I eat in my Allis, only sandwiches, so I don't really know where that piece of fork came from!!
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Posted By: tbran
Date Posted: 19 Jul 2020 at 9:15am
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https://na.apb.agcocorp.com/p/agcoallis/79006286/l/356?keyfield=2d09f3390e2ed249ab2e89e1117e2b6b " rel="nofollow - https://na.apb.agcocorp.com/p/agcoallis/79006286/l/356?keyfield=2d09f3390e2ed249ab2e89e1117e2b6b ; ------------- When told "it's not the money,it's the principle", remember, it's always the money.. |
Posted By: Zmf
Date Posted: 17 Aug 2020 at 1:05am
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uploads/19866/IMG_20200817_075011_2020-08-17_00-54-40.jpg" rel="nofollow - IMG_20200817_075011_2020-08-17_00-54-40.jpg Hope you can open this pic. So this is the broken fork. I didn't find the rest of it? What is the function of this stainless steel plate, why would it have broken and what would be my options on replacing it? Thank for your time. Andre du Toit |