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Ford Tractors Discussion Forum

Ford 850 serial number

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03-31-2020 07:16:44

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Hey guys new here....just bought the family tractor...I believe a 1956 ford 850...serial is very clearly 89I83..I as in indiana....I cannot seem to find any ref to the 9 or the Capitol i...anybody have any ideas..

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Tim PloughNman Daley

04-01-2020 04:42:27

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
No mystery. Heres how it worked: Engine blocks were cast at the Rouge Plant without any serial numbers stamped; those came later. Blocks were set aside in a hold area to cure for 30 days. Its just the nature of the beast. Cast Iron requires a 30 day green period of which to cure otherwise it is too brittle to machine. It is similar to seasoning wood. If you cut green wood, it wont burn. It must be seasoned for a period before it will burn. The next step is to pull engine blocks that have cured at random from the hold area to the machining area. Engine blocks get fully machined, cleaned, and then set in another hold area, still unmarked. Next, blocks get pulled at random to the engine assembly area where they are fully assembled and sent to yet another hold area. Once assembled, engines get pulled at random to the QC Test Area where they are put on special machines to be fully tested for function and gone through a break-in period. If and only when the engine passes QC Inspection/Testing is it then given a hand stamped serial number and gone to another hold area at random, to then wait to be pulled for final assembly on the line. Serial numbers are stamped in sequential order, BUT they are not maintained in any particular sequential order. A functional, assembled QC approved engine was of no concern to staying in any particular order. If at QC Testing an engine failed, it was either sent to a repair shop and retested or if unusable, would be scrapped out. Its only purpose was to ID the engine block whose serial numbers were technically meant to ID the vehicle serial number. Since many blocks were swapped out, a 1956 s/n engine block could have been switched out to a 1958 tractor. Go by the manuals and what your model has. Note the date on this Service Bulletin. S/Ns were used on all Ford engines, not just tractors. Also, the capital letter I was used for the numeral 1; the lower case letter b was sued for the numeral 6 and the inverted b was used for the numeral 9. Before April, 1950 cylinder liners were made of steel and thus stamped with a STAR (*) prefix and suffix. Post 1950 Ford changed to cast iron sleeves and then changed to a DIAMOND (<>) symbol.





Tim Daley(MI)

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Sean in PA

03-31-2020 13:14:49

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
Quoting Removed, click Modern View to see

On an 850 you don't even have live PTO, so yes, at normal engine rpms required for 540 rpm PTO speed even first gear is going to be too fast.

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Sean in PA

03-31-2020 13:13:10

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
Wow, what a brain f@rt there... I meant Ford, not IBM... I was multi-tasking and working on a computer issue at the same time.

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03-31-2020 13:11:41

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
thank you..I am really excited about getting this ole girl running... anyone run a rototiller with a 5 speed?.I have been told it's still to fast.

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Sean in PA

03-31-2020 11:06:37

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
IBM changed their stamping dies a few times over the years, and they did use a capital I as a 1 for a period of time.

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03-31-2020 07:39:13

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 Re: Ford 850 serial number in reply to Rwfarrell, 03-31-2020 07:16:44  
"any ideas?" Yes. The I is probably a 1, thus the serial number would be 89183, which fits the tractor year of 1956,of which you say it is!

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