re: I need help to identify a component on speed control circuit board

Robert and Klaus, thanks for naming the part.

Robert, tomorrow my husband is going to talk to the motor shop that tested it to be certain that is the part requiring replacement. (They don’t actually work on little motors.) He didn’t charge for testing it, so we didn’t want to take up his time. The only marking on the part is MS14 PB 36. I can’t find any part listed exactly that way. The DC motor is 180 volts, 36 amps, 1/17 HP. I’m still not certain of exactly which rectifier is the correct one.

L/W