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John Deere Tractors Discussion Forum
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Loose clutch drive disk on 41 John Deere B

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andy r

01-28-2006 18:57:11




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I would like to know what my options are to fix the clutch driver so it is tight on the crankshaft. I know people have attempted this without a different crankshaft and driver. Has anyone welded and ground?? Heard once about an undersize driver. How worn a crank can that fit up too? Any other ideas? Thanks.




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41JDb

01-29-2006 12:35:24




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 Re: Loose clutch drive disk on 41 John Deere B in reply to andy r, 01-28-2006 18:57:11  
I am currently going through the same problem. I have bought a new driver and my father and I plan to weld up and grind down the splines. I hope it goes well because I really dont want to replace the crank~!



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fixerupper

01-29-2006 06:00:30




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 Re: Loose clutch drive disk on 41 John Deere B in reply to andy r, 01-28-2006 18:57:11  
Welding the crankshaft and grinding it down does work, but you have to be both very patient and a little lucky. Weld just a little at a time, grind on it and then try the fit. You will have to stick the bolt in the end of the crankshaft and tighten the driver once in a while to check for both sideways and out of center wobble. It cannot wobble at all both ways. Finding a comfortable chair to sit on while you work might help. Good luck. Jim

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Tom Windsor

01-28-2006 19:26:54




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 Re: Loose clutch drive disk on 41 John Deere B in reply to andy r, 01-28-2006 18:57:11  
I am not sure if what I am thinking is the same as your problem. I have a B. When it is running and the clutch engaged. The clutch does not chatter. But take it out of gear and it really chatters. It seems to me that the first disk that you encounter after you remove the face plate is chattering on the large drive drum in the clutch. Are we talking about the same thing? I have replaced the disk with one that shows little if any wear...it did not solve the problem...seems if teeth are worn on the larger drum....I need suggestions as to how to rid my machine of chatter.

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Andy R

01-29-2006 06:45:12




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 Re: Loose clutch drive disk on 41 John Deere B in reply to Tom Windsor, 01-28-2006 19:26:54  
Thanks for replying .... What is wrong with mine is that the splines on the crankshaft and the splines in the clutch driving disk (big thick casing) are worn. At some point the driving disk wasn't kept "pulled in" on the crankshaft taper thus it wore both surfaces. Thanks for the reply.



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Windsor

01-29-2006 09:16:17




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 Re: Loose clutch drive disk on 41 John Deere B in reply to Andy R, 01-29-2006 06:45:12  
Ok, I understand the problem now. I had a similar problem on the other end with the fly wheel. The crank shaft was worn at the full up position where flywheel is supposed to ride. You cound get ahold of the flywheel and wiggle it from side to side. Slide it out a an inch and it was tight. Of course this would not work. I could not tighten up the fly wheel to prevent it from wobbling and rattling. After consulting with the old heads around here, I was offered two alternatives. 1. Get shim material and wrap it around the crank and then force the flywheel back on the shaft and then tighten. or 2. prepare some ridgid strip stock, in my case, 1/8 inch thick, (the width of the channel and about 1 inch long) for each and every grove on the crank, and force this stock in there. I tried the second alternative making sure that same thickness went all the way around to prevent wobble...lo and behold, it worked...tightened it right up. I then install the big nut to prevent escape...and tightened the bolts as much as posssible and I am off and running..no more rattle or wobble...we will see after 25 or 30 hours if it is satisfactory! Personally, I don't think the welding and grinding in this area will ever be successful.

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