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Bearing clearance

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Ron Sharpe

07-28-2001 13:31:14




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I am changing the main bearings on my 52 model A.How much clearance should I leave?




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Clooney

07-28-2001 19:36:13




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 Re: bearing clearance in reply to Ron Sharpe, 07-28-2001 13:31:14  
Ron, you will want to run about .004" with a max of about .006" clearance. If the crank has any wear on it mike the crank in 4-5 places & set the clearance based on the tightest spots. Those cranks tend to wear egg shaped & it is easy to set the bearing clearance too tight if using only one mike reading. You will probably have to have the bearings precision bored to fit the crank so take the crank to the machine shop so the same measuring devices can be used to measure the crank & bearing bore i.d.

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gary

07-28-2001 14:14:50




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 Re: bearing clearance in reply to Ron Sharpe, 07-28-2001 13:31:14  
.001 per inch of shaft diameter.



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Randolf

07-28-2001 19:18:29




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 Re: Re: bearing clearance in reply to gary, 07-28-2001 14:14:50  
you shouldn't need to worry about that. On your tractor you should sleeve bearings, not the shim type



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