Resistor

[Ron7000]

What is the difference between a A8NN-12250-A and A8NN12250-B resistor?

Sites say both fit a 9N

 

[Bruce (VA)]

The description is wrong.

A is for the 8N, 48-50

B is for the 9/2N, 39 to 47.
75 Tips

 

[JMOR]

(quoted from post at 12:16:54 06/05/23) What is the difference between a A8NN-12250-A and A8NN12250-B resistor?

Sites say both fit a 9N

ounting screw hole size is different.
1 3/16 centers & either 1/4 older or newer 10-24 .

This post was edited by JMOR on 06/05/2023 at 10:18 am.

 

[Tim PloughNman Daley]

With the OEM Ballast Resistor, either one, you can leave the insulated base and just buy the new resistor, p/n 18-12250, $17 at DC, for OEM ceramic style. Replacement style available too for $6.



Tim Daley (MI)
BALLAST RESISTOR ONLY NO BASE

 

[Duner Wi]

Tim PloughNman Daley,,,new resistor, p/n 18-12250
Now we are getting someplace that makes sense.
Part number for 1932 8 cyl passenger car that was used on 9N tractor.
A8NN prefix for a part used only on 9N2N and never used on 8N early or late , makes no sense.

 

[JMOR]

(quoted from post at 11:08:48 06/07/23) Tim PloughNman Daley,,,new resistor, p/n 18-12250
Now we are getting someplace that makes sense.
Part number for 1932 8 cyl passenger car that was used on 9N tractor.
A8NN prefix for a part used only on 9N2N and never used on 8N early or late , makes no sense.

'm sure they "made sense" to those assigning the numbers. If numbers are causing you heart burn, take it up with those who assigned them!

 

[Duner Wi]

JMOR, read up on decoding Ford part numbers. Ford had a system.

 

[Hobo,NC]

(quoted from post at 21:08:48 06/07/23) Tim PloughNman Daley,,,new resistor, p/n 18-12250
Now we are getting someplace that makes sense.
Part number for 1932 8 cyl passenger car that was used on 9N tractor.
A8NN prefix for a part used only on 9N2N and never used on 8N early or late , makes no sense.

Actually it does make sense.

https://www.mafca.com/tqa_partnumbers.html

You have to remember the first letter is the decade and the last number means the part was superseded.

 

[Duner Wi]

A decade 1940s often omitted on 1940s part numbers
8 year in the decade. So 1948
N Tractor
N Designed by tractor division
12250 what part this is resisterThere are 11 resisters in 1948 price catalog.
Letters after 12250 designate revisions.A,B etc

https://www.fordification.com/tech/partnumbers_overview.htm