Starter / Generator throwing black dust
 

I'm pretty sure this is an issue with the belt?

Black, soot all over the front...

Is there a sharp edge on either of the pulleys, or did they have rust pits on them? I have had both of those issues turn a belt into dust before.

Well, replacement S/G on the way.. I discovered the issue.. well, from the outside.. I'll tear into the S/G soon... the pulley would sit static while the shaft would spin like crazy.. I'm not sure exactly where the dust is coming from but the S/G was making one heck of a racket when I ran her for 5 min tonight... we'll see what she looks like on the inside... the S/G had enough umph to turn it over once or twice if you pulled (the belt by hand) one compression stroke and got it positioned to turn on the down-stroke.. but the next time it got to the upstroke there wasn't enough torque in the starter to turn over and the shaft would just spin...

good times...

My 71 was doing that too. It has allready been rebuilt.....must have been the belt because it dont make the black dust no more.

So, how in the heck do you get the nut that holds the pulley off? Any tricks? My pulley stays put as the shaft spins, looks like it needs a couple of washers to tighten against the pulley. Quite a gap.

Take it apart and put a rubber strap wrench on the armature? just a guess. Take it to a reputable starter shop.

Gotta use an impact.

Tried the strap wrench.

Dag nab it! That's what I suspected.

I managed to break the nut free.. by wrapping the internals in rubber, and using a pipe wrench on the armature (wrapped in rubber) I was able to finally remove the nut. To find, as I suspected, that the pulley key was absent.. from what I can see it appears the previous user (of the S/G, not tractor) may have stacked some washers and tightened it down against the pulley to make it work! The inside washer was worn down significantly from rubbing against the pulley shaft... until there was enough room for the pulley and both washers to just spin freely.. IE not move when the armature shaft moved... good grief... and this was sold as NOS! NOT!