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Restoration & Repair Tips Board

1020 mcormick deering rod bearing clerance

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hanna

12-31-2006 01:09:33




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could any one tell me about how much clerance is ok i am restoring a 1020 and i have .176 of clearance on my rod bearings and do not know how many shims to remove i dont want to have them to tight or to loose




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Bobcat

12-31-2006 07:17:35




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 Re: 1020 mcormick deering rod bearing clerance in reply to hanna, 12-31-2006 01:09:33  
In a perfect world .oo25 would be nice. But If you mic. the journal you will probably be out of round more than that by now. What I do is keep removeing 1 thin shim at a time until when the nuts are tight you feel drag at some point when turning rod around crank journal. Then I will add until no resistance is felt and when the rod is 90* to the crank no free movement is felt on the bearing when connected to the piston in the bore. If you feel movement then your journal is probably to eggshaped to be using! Also when you put the cotter pins back in the castle nuts you can file the bottom of the nut to get the slots to line up with the hole in the bolt!

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