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John Deere Tractors Discussion Forum
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JD40 pressure plate/clutch

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KB

06-19-2005 17:28:07




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Spent the afternoon working with Dad on the 40. Decided to change the clutch since it started sliping some. The other part of this story is that this clutch has intermittently stuck for as long as I can remember, it would stick and you would have to force it out of gear and if it stuck on trying to shift gears you would push the petal in a couple of time and it would finaly release enough you could get it in gear. Tore it apart and found the pressure plate fingers very badly worn, one almost wore off. Pulled the throw out bearing and although it has some play does not seem to be too bad since it is not rough and turns freely. It does appear that all of the grease came out of the bearing and is scattered all over the bell housing (transmission side) with assorted metal shavings (presumably from the missing finger parts). Also, the clutch plate and pressure plate are dry.

Now my question has anyone seen anything like this before? Secondly, could the throw out bearing lock up and then free up and turn smoothly, I don't think so but...?

Bottom line I do not want to put this all together and find out I shoulda done this or that. Anything special I should be looking at?

Thanks

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JD 4020 3020

06-21-2005 20:22:51




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 Re: JD40 pressure plate/clutch in reply to KB, 06-19-2005 17:28:07  
Might be worth a look at the shaft that leads to the transmission. where it connects to the tranny, there is a little pin that holds it on, which usually falls out that will cause the clutch to stick if the shaft slides foreward. Fixing this requires a second split right under the dash.



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RonMC

06-20-2005 00:46:10




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 Re: JD40 pressure plate/clutch in reply to KB, 06-19-2005 17:28:07  
Seen this a lot in automotive on the manual adjust clutches. As the friction plate wears, the pressure foot moves closer to the flywheel, causing the fingers to move toward the release bearing. If the clutch isn't adjusted to restore the free play, the bearing will wear out the fingers, being made of better stuff. Clutch adjustment is always about restoring free play in normal function. If your free play is increasing, you have a different sort of problem.So you see why at least an annual adjustment is a good idea - even if it feels OK on the pedal ! Ron

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RonMC

06-20-2005 00:52:13




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 Re: JD40 pressure plate/clutch in reply to RonMC, 06-20-2005 00:46:10  
May as well finish the whole question and answer. For the price of a release bearing would you like to split the tractor again ? Thought not ! Ron



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Henry J

06-19-2005 19:32:13




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 Re: JD40 pressure plate/clutch in reply to KB, 06-19-2005 17:28:07  
kb

I would always put in a new throw out and pilot as mentioned.

I could not imagine breaking that baby apart again just to put in the bearing.

Also, the pressure plate fingers have to be replaced/pressure plate assy. I have had excellent serv ice out of used ones.

good luck in which way you go



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buickanddeere

06-19-2005 18:35:27




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 Re: JD40 pressure plate/clutch in reply to KB, 06-19-2005 17:28:07  
Equal loading of each finger and exact clearances are required for long life and safety.



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Mike M

06-19-2005 17:33:12




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 Re: JD40 pressure plate/clutch in reply to KB, 06-19-2005 17:28:07  
Pretty much always use a new throw out and pilot bearings.



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