nostep
Bronze Member
Go to Messicks.com. Look up parts for your B7100. In the electrical group, you can see the panel group. In the panel group there is an item #20 which is the regulator. See if you can find that behind the dash panel.
Apperently some b7100 tractors have a regulator behind the dash and some have a recitifer behind the dash. On the Messicks site if you look at a B7100D-P part #20 is listed 2 times once as a regulator and once as a recitifier. I would guess that it depends on the age of the tractor. I know what is behind the dash on my B7100 (1977 gear drive-old style) is a recitifier that changes the alternating current produced in the dynamo into dc current for the battery and lights. The voltage regulation on this type of system is built into the light switch. It is a manual type of voltage regulation. When the lights are off it is a low charge rate and when the lights are on it is a high charge rate. Kind of similar to the old Farmall tractors. My Dads Super A has a switch that I think had 3 positions low charge, high charge and lights.Go to Messicks.com. Look up parts for your B7100. In the electrical group, you can see the panel group. In the panel group there is an item #20 which is the regulator. See if you can find that behind the dash panel.