Looking For 1940 Origanel A,B,H,M

Tue Feb 13, 2007 7:11 am

Does any one have an origanel 1940 A,B, H, M.
Lokking for serial # matches from mags.

Tue Feb 13, 2007 2:13 pm

I can try to look at my dads 1940 very early 1940 A. I am sure it is the orignal mag since he has had the tractor over 40 years.
where is the s/n located?

Tue Feb 13, 2007 4:44 pm

That would be good, I would like to know what the serial # on the mag is like H4 ###### And if it has a cable shut off or push pull switch.
I really appreatiate it ,

Tue Feb 13, 2007 4:56 pm

Hey Mag Man ,

I have a H4 mag on the shelf I took it off a tractor that got scraped. Do you want the mag ser # any way?? Ido know the tractor was a H and had a push pull switch.

Tue Feb 13, 2007 9:04 pm

Sure, How abou the mag you got a home for it? lol.

Tue Feb 13, 2007 9:59 pm

I have an aunt that has a 45 H with H4 mag. I'll get the number next tiME i AM THERE, BUT i CAN TELL YOU IT HAS A GROUND TYPE SWITCH, NOT CABLE.

Wed Feb 14, 2007 6:40 am

yes my dads A has no electrical on it so it has the cable on the mag to shut it off.

Wed Feb 14, 2007 10:56 am

I didn't get the number from the magneto, but H serial #533 was at the 2004 RPRU.


you can see more pictures of the tractor at

Thu Feb 15, 2007 8:34 am

Thanks John That Helps,

Fri Feb 16, 2007 8:26 am

magman you still the numbers off my mag? I can try to get them this weekend

Fri Feb 16, 2007 10:20 am

Yes I would if you can get them.

Sun Feb 18, 2007 5:47 pm

IH Mag. H4 503660. Came off a 1937 WC Allis Chalmers. Original tractor model and year unknown.


Mon Feb 19, 2007 7:20 am

mag man sorry I didn't make it down to my dads but I hope to do it this week.

Mon Feb 19, 2007 8:48 am

No big Hurry just a little rearsearch I am trying to do,

Fri Mar 09, 2007 4:49 am

Mags were not matched to tractor serial numbers. Magnetos were numbered as they came off the assembly line. I located a H4 mag S/N 71X (cant remember the last number) a few years ago to use on my S/N FBH700 Farmall H....

The pic shown in this post of the early magneto kill assembly also shows part of the EARLY wiring harness arrangement used on the early Hs & Ms...