Allis Chalmers 5040 Clutch
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=207933
Printed Date: 27 Aug 2025 at 2:16am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Allis Chalmers 5040 Clutch
Posted By: lkennett
Subject: Allis Chalmers 5040 Clutch
Date Posted: 25 Aug 2025 at 2:40pm
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Hi guys, I have a new to me 1976 5040. 6 speed with the dual clutch. The clutch has been slipping badly (known problem when I picked it up) I have the inspection plate removed after taking the loader frame off. Anything in high range is completely useless. When I take the inspection plate off the first thing I notice is alot of grease. Second thing is the clutch fingers are touching the throw out bearing (I think there should be a gap). Does anybody have access to the clutch specs. How to adjust? Basically pages from the service manual. I am about a day from splitting the tractor, I only have the fuel linkage and a hydraulic line to disconnect and I can start. I expect once I get it apart it probably needs a whole clutch kit and flywheel machined but I would like to verify if I knew the tolerances.   |
Replies:
Posted By: AC720Man
Date Posted: 25 Aug 2025 at 8:07pm
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Not familiar with those but My guess is someone over greased the throwout bearing? Assuming that’s what the grease zirk is for. Hopefully Gary Burnett will see the thread, he knows these tractors well. ------------- 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 |
Posted By: lkennett
Date Posted: 25 Aug 2025 at 9:17pm
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I have never had a tractor with a greaseable throw out bearing. Nice feature but don't over do it I would think. My dad just had to have the throw out bearing done for the second time on his Case 685. $$$ to have a shop involved. He wishes it was greaseable!. Lots of mysteries with this 5040. Unknown hours. The previous owner said it was a loader tractor used in the hay field. He is an older guy that seems to buy and sell alot of equipment. He was using the loader and noticed the transmission was overflowing with fluid. The seal on the loader pump let go (I posted previously) and was dumping into the trans. I said is it possible a bunch of fluid got dumped into the clutch area? It just feels like nothing is there. I can pop the clutch in 3rd low and the tractor just starts to walk forward. High range 4th it wont even move unless i am downhill. No smells, no smoking. I only have to disconnect the main hydraulic return line and I can have it split tomorrow or the next day. It would be nice if I took this apart and it just needed a clutch disc and not the whole kit. I am in Canada, probably looking at $1500 for the parts at least. Lawrence  |
Posted By: lkennett
Date Posted: 26 Aug 2025 at 9:02pm
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Split the tractor tonight. Not dusty but greasy! seems like alot of oil. I had a half can of brake clean but I will run to town tomorrow and get a couple more cans. Just so much to clean up. The driven clutch is toast. PTO clutch looks fine. Throw out bearing and Pilot bearing also look fine. I am not sure about the rest of it. If anybody has specs it would be appreciated. Trying to figure out next steps. Here are some pics.        |