A while ago I got one of the 332's up and running but found it wasn't charging. I had went thru everything and came to the conclusion that the external regulator must be bad. While I was searching around the Web for a replacement Reg, I realized that these regulators don't wire the same as the regs. on the Onan and Kohlers do. I switched the wires around and now I have 13.7v coming from the reg. going to the battery.
That saved me some $$ as those regulators that JD used with the Yammar Diesel aren't cheap.