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Discussion Forum
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Sleeves for Super A

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Brian

09-23-2001 10:41:34




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I was having a discussion with a mechanic who told me that super A's had two different bores, or sleeves. He referred to a big bore, and a non big bore. The serial number on the block of my tractor is 251069R1, can anyone tell me which sleeve I should have ? And also, where is the size diffence between the big bore and non big bore ? Are they not all 3" bore ?

thanks
Brian




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gene b

09-23-2001 19:42:17




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 Re: Sleeves for Super A in reply to Brian, 09-23-2001 10:41:34  
maybe the only way you will know what you really have would be to take off the head if you have the right block you can go from 3-1/8 to 3-1/4 by turning the dia of the sleeve at the bottom so it will fit in the area of the o-rings some sleeve kits have different dia sleeves in this area best way would be a teardown and go from there better talk to some one who has done it



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Haas

09-23-2001 12:24:03




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 Re: Sleeves for Super A in reply to Brian, 09-23-2001 10:41:34  
Almost all Super As had a 3 inch bore which was the C113 engine. Some of the last built Super As may have the C123 engine which has a 3 1/8 inch bore. When the 100 came out, was when the official switch was made to the C123 engine. It is common practice when rebuilding the C113 engine to use over bore sleeve and convert it to 3 1/8 bore. That makes it a 123 cu in engine, but it is still not the same as the as a C123 engine which has a different sleeve than the C113 engine. Youar block number indicates you have a C 113 engine. If rebuilding your engine with new sleeves and pistons, use the overbore sleeves and pistons to go to 3 1/8 inch. If your tractor was ever overhauled with new sleeves, it likely that it already has the 3 1/8 inch sleeves.

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