Here is how I replaced my motor.
Using sundance solar's motor
, and the cap from a bottle of Absolute vodka (or any good cap that is 1 3/8" dia).
Cut 3/8" off the top edge of motor housing with dremel cutting attachment:
Cut wires between battery and motor housing. Remove motor by grabbing the exposed edge with vicegrip pulling with a slight twist back and forth:
Cut grey and white wires close to soldered connection on motor:
Grind away most of plastic inside cap with dremel tool. Cut 1/4" hole in center. Seat motor in cap with silicone:
Solder battery and panel wires to motor:
Seat cap with motor inside motor housing with silicone:
...Bob's yer uncle