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Harry Ferguson Tractors Discussion Forum
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Clutch overhaul

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Rick Whitworth

07-06-2004 06:12:32




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Split tractor to unstick clutch, found two separate plates. Is this normal? The plate was stuck to the flywheel, which I unstuck, but it does not appear to attach to anything and has to be held in place when reattaching hub. Is this normal or has my clutch plates separated somehow? I put tractor back together and clutch will still not work. I only saw one spring, but I think there should be two. Would this prevent the clutch from working or only make pedal return soft?

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Larry in Missouri

07-07-2004 12:06:33




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 Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 06:12:32  
When I split my TO-30 for the more nefarious reason of installing a new short block, I checked my clutch plate, and it looked almost brand new, lots of lining left. But when Ie examined it more closely, I could see that the lining was loose on the plate! Apparently the rivets weren't holding the lining, and I could rotate the lining a bit on the plate. I took it in to the MF dealer and they agreed that it was kaput. So about $50 later I had a new plate. I certainly didn't want to go through another split just for that! So I would not be really surprised id the clutch lining departed the plate.

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Jerry/MT

07-06-2004 14:56:56




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 Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 06:12:32  
I'm a little confused by your description. The clutch assembly consists of two major subassemblies;the clutch itself and the "pressure plate" assembly. The clutch is a thin metal disc with a splined hub in the center and covered with a brake lining type material, usually revited in place. The pressure plate assembly is a spring loaded disc contained in a housing that bolts to the flywheel. It also has a series of radial fingers on it. The radial fingers are actuated by the throwout bearing which in turn is actuated by the clutch pedal. The resistance you feel when you step on the clutch is the throwout bearing contacting the radial fingers and unloading the springs to allow the clutch friction disc to disengage. If your pedal feels soft you might have to adjust the pressure plate to get the spring tension right. The method is in the Ferguson Shop Manual. If you don't have Ferguson Shop Manual, get one and it'll make your life with these old machines a lot more fun!

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Rick Whitworth

07-07-2004 05:31:28




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 Re: Re: Clutch overhaul in reply to Jerry/MT, 07-06-2004 14:56:56  
Thanks,

Sounds like I need to resplit the tractor again (ooh boy thats fun) and see what I did wrong. I am definitely not feeling any resistance when I depress the pedal.



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gshadel

07-06-2004 10:29:54




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 Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 06:12:32  
Rebuilt my TO-20 clutch last Winter, I think that is about the same as a TO-30 clutch. Before you tear your tractor apart again, I recommend you check your clutch pedal travel. I don't recall the pedal spec's off the top of my head, the manual has the spec's and procedure. You just about need 3 hands to adjust it, but it can be done with two. You should have one "loose" clutch disk between the clutch housing and the flywheel. Once you torque down the clutch housing to the flywheel, the clutch disk should be held tight by the spring tension between the clutch disk and the clutch housing. The clutch disk has friction pads on each side and a splined hub in the middle. A new clutch disk costs about $45. The clutch housing does have a metal plate in it that rides against the clutch disk, but it is secured to the clutch housing with clips, springs, and stuff. I didn't need to mess with that, it looked like a pain in the butt to get it out of the housing. You need some sort of pilot shaft or bushing to keep the clutch disk lined-up in the middle of the flywheel while you tighten down the clutch housing. You probably did that or you would have had trouble lining up the clutch with the transmission shaft. If your clutch was different than any of this, that may be your problem.
I think there are 2 return springs on the throw-out arm inside the bell housing, might make the pedal return soft, but the clutch would still work.
If you don't have a manual I recommend getting one. There are torque spec's for the clutch housing to flywheel bolts, like ~12 ft pounds I think. The manual also says to measure the height of the housing off the flywheel, and a couple other things that you need to insure your clutch wears right.
Hope this helps, Good Luck.

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Rick Whitworth

07-07-2004 05:33:56




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 Re: Re: Clutch overhaul in reply to gshadel, 07-06-2004 10:29:54  
Thanks for your comments they really helped to alleviate several concerns. I will dig back into and see where I went wrong. I am not feeling resistance when I depress the pedal so apparently the Throw-out bearing is not making contact peoperly.



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gshadel

07-07-2004 11:05:41




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 Re: Re: Re: Clutch overhaul in reply to Rick Whitworth, 07-07-2004 05:33:56  
Good luck, make a new post and let us all know what you find... we all might learn something.
have fun!



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Jim W

07-06-2004 07:06:46




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 Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 06:12:32  
I would say this is not normal. I've had a clutch disc come apart, I think the way you are describing - do you mean just he friction part was stuck to the flywheel?
Better fix it right; it's enough work not to go in there a third time! You can get the existing clutch plate resurfaced, or get a new one. I was surprised to find that it was cheaper to buy a new one for mine.
How about telling us what model this is, and then someone may know whether there should be two springs? And if there should why not put another one on? But to answer your question I think it wold only make the pedal return soft.
Jim

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Rick Whitworth

07-06-2004 08:53:50




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 Re: Re: Clutch overhaul in reply to Jim W, 07-06-2004 07:06:46  
Yes the friction part(plate) was stuck to the flywheel, but there was another plate that was attached to the housing. I could not tell if one had separated from the other or it is designed as two separate plates.



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Jim W

07-06-2004 09:46:35




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 Re: Re: Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 08:53:50  
The clutch disc is a metal part with friction material on both sides. This is supposed to be a single unit. Usually the friction material is riveted on to the central metal part.
Jim



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Rick Whitworth

07-06-2004 08:50:39




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 Re: Re: Clutch overhaul in reply to Jim W, 07-06-2004 07:06:46  
Thanks for comments. Sorry I forgot to include the model which is a 1953 TO-30.



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John (UK)

07-06-2004 15:37:51




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 Re: Re: Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 08:50:39  
From what you say it sounds as though one lining has come off and stuck to the flywheel and the drive plate is stuck to the clutch assy. thats how it reads to me, when you say it was stuck to the housing. Clutch plate part number for a TO30 is 180241M91 or 181141M91 (Ferguson part numbers) or Sparex part number is S60801. If you would like a picture of the plate mail me at scorpio29 at lineone dot com

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James, UK

07-06-2004 07:01:52




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 Re: Clutch overhaul in reply to Rick Whitworth, 07-06-2004 06:12:32  
From your description, I think you need to replace your clutch plates - you shouldn't need to hold any of it in place when reassembling the tractor. All clutch parts should attach to something else.

Polish/buff your clutch driven plate and flywheel before reassembly - it makes for a smoother take-up.

HTH



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