Hi, Just dismantled mine for front bearing failure, I used a pencil type blowtorch. If you put a little flux on the solder it will help the solder flow as you melt it. My stator had shorted to earth so knackered, however here in Brunei they will rewind it! Just as well as a new alternator here is over 350 quid!!! To test the stator check between all three wires to the case there should be no continuity, then test between each pair, there should be very low resistance a couple of ohms or less. To test the rotor check between the slip rings and the center shaft and there should be no continuity, then test between the slip rings and there should be low resistance about 2 -3 ohms. Recommend change the brushes whilst at it.