12 volt conversion

[radioguy41]

That's actually my concern with the 10SI. The number 2000 rpm's to initiate charging appears in a number of posts and with the Cubs gov set at 1800 rpm's I wonder how well it works in the real world.

[Jim Becker]

Don't confuse alternator rpm and engine rpm. Alternator speed will depend on pulley sizes for both the fan belt and generator belt. Also keep in mind that there were 2 generator belt pulley sizes on the fan hub.

[bofahs]

I used Chipmaker's suggestion of the 12180 mini alternator, one wire. I used the front part of the lower generator bracket for the lower mount, and flattened out the upper mount strap - worked perfectly. Easy-peasy wiring - find the old thread for several diagrams. Charges all the time - 14.6 volts at the battery, I recall. Had to use a 20-inch belt to keep it under the hood, but it was a great improvement to the tractor.

[radioguy41]

Excellent, thank you, that's the kind of specific information I'm looking for.

[Drfting1]

Upgraded to 12v last winter when I restored her, used a db single wire 35 amp... Don't really rev her other than normal use and have had zero issues with charging

[Drfting1]

this was the diagram I used to wire her up with.... just minus the resistor.. coil has one built into it

[Drfting1]

Forgot to mention... The one I put on her had a test sheet of 1050 rpm kick in, also made my own wire harness for the complete tractor... Pretty simple to do, proper gauge wire, ends and heatshrink

[rockfarmer]

I used a Hitachi 14255 which is not a one wire alternator. 50 amp. It begins charging around 600-700 engine rpm's.

I am happy with it's performance but next time, I will use Chipmaker's recommendation.