[Farmall] Early Cub light switch (was Re: Farmall Cub Engine seal replacement

[Mike Sloane]

The problem is that the early (1947-48) Cubs didn't use a voltage 
regulator in the charging circuit (there was just a cutout relay), so 
that there was an extra set of contacts in the light switch used to 
increase the charging rate (and was also activated when the lights were 
turned on). So trying to use the switch from the later Cubs won't work. 
I believe that the old style switch *may* still be available (it was 
also used on other IH tractors of the period - the early A/B/C/H/M 
tractors). The other choice would be to replace the earlier generator 
and cutout relay with the later generator and regulator.

On 4/28/2011 8:04 PM, WALTER AVERY wrote:
> not the same subject but,
>
> has anyone replaced the 4 pos light switch (mine was rectangular on
> the back side) with one with round back such as #593 from OEM?  i
> tried to wire it per their diagram but it doesnt seem to be working
> correctly. with engine running and turning the lights on they flicker
> and the new amp gauge needle flickers on discharge. it does not
> flicker with engine off.  i will check wiring again.
>
> 48 cub with magneto
>
> my next rebuild will be the generator with regulator replacement
>
> thanks guys, appreciate any guidance Walter Avery