Here's the internal layout. The motor shaft is on the left, the "idlers" are in the middle, and the actual spindle
drive shaft is on the right. The two gear levers on the (far) side can be seen, and they move two splined collars-
one at the bottom of the idler shaft, and one at the top of the spindle shaft. The gearbox provides four speed
ranges, and the two-speed motor of course doubles that to eight.
Several of the gears are phenolic, to reduce the noise level as it's running. All the gears
and bearings on this example turned out to be in fine shape.
Most of the smaller gears on the ilder shaft are steel. Note the cap with an oil cup at the top of the stack.
A similar cap blocks the bottom of the shaft, in order to help control oil seepage.
And finally, the entire motor rotor assembly comes out. Being a 3-phase motor, there are, of course,
no brushes to worry about, and again, all the bearings were in great shape.
And that gets us down to almost a bare casting. I believe the stator would have to be pressed out if I
wanted to remove it, so I kept it wrapped and covered well, as I worked on it and painted everything.