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H4 mag serial numbers

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SKK - Big Red F

01-27-2007 09:25:31

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Anyone know exactly what serial number scheme and starting point IH used. The Blue ribbon service manual gives the h4 xxx,xxx but dosen't show any ranges.

Obviously the 300,000 & 400,000 numbered mags don't correspond to physical tractors, but maybe only the last five digits really mean anything.

Any information helpful, thx.

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gene bender

01-27-2007 13:04:52

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Re: H4 mag serial numbers in reply to SKK - Big Red Fan, 01-27-2007 09:25:31

When you consider that all models of A,B,H,M,W4,W6,W9 pluss all the engines that were on combines,balers,power units and then add the numbers would be over probably a million.

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SKK - Big Red Fan

01-27-2007 15:10:04

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Re: H4 mag serial numbers in reply to gene bender, 01-27-2007 13:04:52

Yes but the others (W) etc. have their own prefix & suffix designations, and I've run across a 1941 H4 mag in the 389,xxx range which seems like a lot that early, even taking possible engines in account at that time. Unless they continued the numbering from the F20, F30s etc. but I doubt it.

I can't remember when they bought out the OEM supplier and started making the units under their own name.

Just a feeling that something eles going on in this serial assignment.

But been wrong more than once.

skk

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Guy Fay

01-27-2007 16:11:48

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Re: H4 mag serial numbers in reply to SKK - Big Red Fan, 01-27-2007 15:10:04

IH bought out Accurate Engineering around 1919, well before the H-4 entered into production in 1939. H-4s were used on all Letter sereis tractors on up except for Cubs- Magnetos used on Super W-6s were H-4s.

I suspect the H-4 serials start quite low and work up. I know the archives in Madison has some of the later H-4 monthly serial numbers, but I've never seen the earlier ones, never looked for them either.

By the end of 1941, IH had alread produced around 200,000 letter series tractors.

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