[rotorwrench]

The field pole shoes can be polarized the same as any coil will magnetize a piece of iron or steel on a DC current shot. If it has already been polarized then disregard.

The powerhouse has an unusual armature. Have all possible tests been done? Is this a 3 brush or a 5 brush generator? Ok I went back and saw that it's a 5 brush P3.

I'm not a big fan of motoring them but is a rudimentary test. Starter motors draw more current due to the heavy windings they have and that's what gives them the torque they need. Generators have relatively fine windings by comparison and the brushes are lighter duty. I've used a buffer wheel to turn generators with a test light to see if it will generate enough power to light up a bulb. If it will then it will bring the cut out on line.