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1943 B Crankshaft End Play, Hand crank

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Ben.

09-18-2001 04:17:40




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I notice that my tractor crankshaft has end play, about 1/4" Which end needs to be rebuilt? Fly wheel side or clutch side. Thank You




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Paul from MI

09-18-2001 20:58:23




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  

Ben, If the flywheel is far enough out to get 1/4" end play, the drive lug for the oil slinger is probably out of engagement. In order to set the end play correctly, the drive lug on the inner face of the flywheel hub must fit into the slot in the outer face of the crankshaft oil slinger. If not, the inner face of the flywheel hub won't contact outer face of the oil slinger and end play can't be maintained. There should be no visible gap between the inner face of the flywheel hub and the main bearing housing. Proper end play is .005"-.010", and I usually use a bottle jack between the end of the crankshaft and the right tire to hold the crankshaft to the left when setting end play. Just slide the flywheel all the way on and tighten and it's usually about right. Always a good idea to use new bolts in the flywheel too. It's a lot cheaper than replacing a flywheel and crankshaft if it gets loose and wears out the splines. It really irritates me to see a nicely painted and decalled tractor at a show with the flywheel about to come off because some one didn't know how to put it on right. Good Luck, Paul

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Clooney

09-19-2001 03:31:22




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 Re: Re: 1943 B Crankshaft End Play, Hand crank in reply to Paul from MI, 09-18-2001 20:58:23  
Paul, the slinger will follow the flywheel out & will stay engaged, the play he is seeing is between the slinger & main bearing & not between the flywheel & slinger. If the slinger stayed tight to the main bearing as the flywheel moved out he wouldn't be able to feel any end play in the crank as the actual thrust surface is the slinger to L/H main bearing housing.



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Dave K

09-18-2001 14:25:18




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  
My 1948 A has a large threaded nut on the crankshaft on the outside of the flywheel. I can loosen the flywhell clamp bolts and then tap the flywheel in a little, draw up the big nut which holds it in position, try the end play and work that till I get it tight. This appears to be an original JD set-up. Don't have the parts book right in front of me to look.

Dave



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Brad Brooks

09-18-2001 11:39:16




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  
I had a John Deere A several years ago that had about a 1/4" of end play on the crank shaft. According to the sevice manual the location of the flywheel on the crankshaft controls end play.
You must loosen up the flywheel by loosening the two bolts behind it and push it farther onto the crankshaft to get the desired endplay (1/32").Retighten the bolts and start the engine up and check again. GOOD LUCK!!

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Prune Picker

09-18-2001 10:02:39




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  
Ben, my '44 BN had the same condition. I took a block of wood 2" x 6", layed it flat across the clutch cover, and cinched it down with a come along strung between the the rear axle and front frame support. I then removed the tapered flywheel fastener and gently struck the flywheel with a hammer and block of wood until it was snug. I couldn't move the flywheel any other way. There are no leaks and the thing works fine. Just make sure you don't overtighten when snugging the flywheel up against the seal.

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Clooney

09-18-2001 07:55:55




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  
Ben, all you have to do is loosen then slide the flywheel in towards the case until you get .005"-.010" end play. You will have to wedge a block of wood between the R/H rear tire & the crankshaft end (remove clutch cover first) or have someone hold the crankshaft towards the flywheel side to keep the crank from moving with the flywheel.



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lynn

09-18-2001 05:30:00




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 Re: 1943 B Crankshaft End Play, Hand crank in reply to Ben., 09-18-2001 04:17:40  
ben flywheel side check the clutch side for main bearing clearance lynn



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