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Re: A vs. Super A
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Posted by Hugh MacKay on November 25, 2004 at 05:48:56 from (209.226.247.132):
In Reply to: Re: A vs. Super A posted by Martin on November 25, 2004 at 05:01:36:
Martin: Actually all Super A's with the exception of the last 1,957 built had the same bore from factory as the A did, 3". From serial number 356001 to 357958 they had the C-123 engine with 3-1/8" bore, those tractors were called Super A1, not to be confused with Super AI or (Industrial). From serial number 310000 on they used the C-123 block, with thicker sleeves giving them still 113 cubic inches. That block part number used after 310000 was 354898 R1. Since manufacture all A and Super A can be converted to 3-1/8 bore sleeves and pistons. On the tractors having block with part number 354898 R1 you can actually install 3-1/4 bore sleeves and pistons, same as used in C-135 engine. You will not however have a 135 cu in engine as that one used longer stroke as well. It only took 45 years for me to learn this much about these. I posed the question a few months back, can a C-135 engine be fitted with C-135 crank and rods as well as 3-1/4 bore sleeves and pistons, and giving full 135 cu in. I am not satisfied I have good answer on this yet.
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