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Tractor Pulling Discussion Forum

pulling clutch

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greg

06-14-2004 17:13:22




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Does any one know if they make a pulling clutch for a john deere A? my stock clutch keep slipping.
thanks




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JPatton

06-14-2004 21:03:24




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 Re: pulling clutch in reply to greg, 06-14-2004 17:13:22  
Greg, Those two cylinder clutches are very tough. Are you aware they are adjustable? There are three adjusting nuts behind the cover on the clutch pulley. You should get a manual for the proper procedure but basically after you remove the cover, remove the cotter key and rotate the nut counterclockwise one notch of the castle nut. Be sure to leave it lined up so the cotter key will go back in. Most often I usually only have to adjust 2 of the 3 nuts so eyeball each of them before starting to see how even they are. Start with the one(s) that are not in as far as the others. After you make the ajdjustment on the first one, try snapping the clutch handle in and out. Only remove one cotter key at a time so you won't loose track of which ones you have adjusted. If you get to the point it is too difficult to snap in, it will be equally difficult to disengage. Generally that is too tight. Those clutches have two replaceable disks that are free to float inside the clutch. If you have a very early A, (34 or 35) they only have one disk. I have never seen one of the later two disk clutches that wouldn't hold if properly adjusted. Here is a hint, when replacing the disks, new ones are thicker that the worn out ones but they are softer too. That means more frequent adjustments may be necessary. Hope this helps. If anyone else has information that I have overlooked or in case I am not 100% accurate, please jump in. Good luck.
JPatton.

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JD A

06-15-2004 14:58:35




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 Re: Re: pulling clutch in reply to JPatton, 06-14-2004 21:03:24  
All the nuts must be turned the same amount to keep the pressure even on the clutch driver. A two disk clutch will only handle 60 to 70 hp. For a more powerful engine use the late model four disk.



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Drew

06-16-2004 10:19:30




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 Re: Re: Re: pulling clutch in reply to JD A, 06-15-2004 14:58:35  
I'm putting 100hp thru a two disk clutch with no problems. An easy way to get the same pressure on the adjusting nuts is to tighten them with a torque wrench.



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a puller

06-16-2004 11:28:22




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 Re: Re: Re: Re: pulling clutch in reply to Drew, 06-16-2004 10:19:30  
how did you get 100hp? the most I HAD ever heard of was 85. what is the cubes of your engine? thanks alot, am lookin at doing a G.



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Drew

06-16-2004 18:01:56




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 Re: Re: Re: Re: Re: pulling clutch in reply to a puller, 06-16-2004 11:28:22  
552ci w/ a Jerry's Head. That hp is at 620 pto rpm, or 1120 engine rpm. That head works better the higher you rev it. It likes to run @ 1300rpm.



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Mel in SW Iowa

06-16-2004 09:15:18




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 Re: Re: Re: pulling clutch in reply to JD A, 06-15-2004 14:58:35  
The best 2 cylinder clutch adjustment I have found is: 1)make sure adjusting nuts and bolts turn easily throughout the adjustment span. Deburr if necessary. 2) For nice smooth daily user, I like to find best quality grade 8 lockwashers the correct size for the adjuster bolts. I try to match for uniform height. I put one of these under each clutch adjuster nut and snug the nuts down an equal number of threads on all 3, adjusting as already explained. 3)Once I reach the snap-over effort that I expect to provide adequate clutch lockup, I use an inch pound torque wrench when the clutch is engaged to balance out adjuster nut tension as equal as possible.
Try it, you will like it.
Mel

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Greengo

06-14-2004 22:32:28




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 Re: Re: pulling clutch in reply to JPatton, 06-14-2004 21:03:24  
On my Unstyled A you turn the nuts clockwise to tighten the clutch.



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John

06-16-2004 16:44:30




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 Re: Re: Re: pulling clutch in reply to Greengo, 06-14-2004 22:32:28  
All I have ever messed with turn clockwise. Maybe he lives south of the equator. They might turn coutnerclockwise down there.



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