Re: 8N serial number

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Posted by Tim Daley(MI) on November 01, 2017 at 06:08:22 [URL] [DELETE] :

In Reply to: 8N serial number posted by Ward on October 30, 2017 at 22:38:24:

In addition to what I stated below, the early 8N's had a casting date code on a boss tag attached to the starter pocket -SEE PICTURE below. The date code is defined alpha-numerically as: 1st = Letter A-L, for month block was cast, 'A' being January. 2nd = 2-digit numeral for day of month; 3rd = single digit for year, i.e. '7' equals 1947. Thus my early 8N casting code tag has "I167" defined as cast on September 16, 1947. Know this too, that engine block serial numbers do not define an exact date tractor was manufactured.` It's the casting date code tag that identifies when the block was cast, not machined and tractor assembled. Cast iron needs 30 days to cure before machining. Blocks were cast, put in a hold area at random, then pulled at least 30 days later at random, and sent to the machine shop. Next they were pulled, at random, to an assembly area where the engines were assembled, not the entire tractor, just the engine. No serial number had yet been assigned at this point. Serial numbers were hand stamped on the blocks AFTER they wee assembled and passed QC testing. Only then was a serial number stamped. Thus, if your s/n is as you say, "*8N-II6I68* then it falls into the 1948 category. What does your engine casting code date tag have? Again, the important fact to consider is whether a front mount or side mount, 6-volt or 12-volt.

Tim Daley(MI)


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