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Re: NAA/Golden Jubilee serial number

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Tim PloughNman Daley

11-01-2019 03:28:32

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FWIW & FYI: You need to understand that Ford hand stamped the engine block serial number on every vehicle, not just the tractors. Engine blocks were cast at the Rouge foundry (note no s/n stamped) and when cooled, were moved to a hold area to cure for 30 days. Standard practice for cast iron is to allow a 'green period' to cure as the material is too brittle to machine until then and will break tooling and material. It is similar to seasoning firewood. You don't use fresh cut trees for firewood as it won't burn. It needs to be seasoned to cure so it does burn. Serial numbers were only stamped once the assembled engine blocks were tested and passed QC Inspection. Blocks were then moved to a hold area at random and as the assembly line demanded, pulled AT RANDOM to meet up and be mated with a vehicle. Serial numbers were meant to also ID the vehicle s/n but many engines were swapped out to replace blown or rebuilt engines. The term 'mutt' is used often to describe a model with a swapped out engine. An engine could have been built and ID'd in one month and not pulled for assembly until the next month or two. Understand? So it's kind of a moot point trying to pinpoint a date when your tractor/vehicle was built. Unless one has positive proof your tractor was assembled on a particular day, improbable and highly unlikely, don't worry. No records exist to verify what was built and when it and, it is only the parts YOU have on YOUR tractor that matter. One example is 6V/POS GRN or 12V/NEG GRN.


... note date of this Service Bulletin

Tim *PloughNman* Daley(MI)

*9N653I* & *8NI55I3*

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11-01-2019 05:40:17

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 Re: NAA/Golden Jubilee serial number in reply to Tim PloughNman Daley, 11-01-2019 03:28:32  
I'm not worried about an exact date.
One guy commenting on the thread insisted that only NAA's with the s/n stamped on the block were Golden Jubilees; any with a bellhousing stamp were '54's or "fake" Golden Jubilees. The s/n on mine is well below the last of the '53 models.

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