Window Motor will not lift ball anymore. It did, but it wont any more.

[Al Skierkiewicz]

To remind everyone, the locking pins in these motors are really only an issue when driven by Jaguars. There is a lot of discussion about this in the files. It was first brought to our attention by John Novak from Team 16.
I like Todd's suggestion, so you can check if the motor is defective or just being asked to do too much (which we all suspect now that we have seen the assembly). The motor does have a thermal cutout (a PTC as I remember) but that is usually backed up by a hot motor casing.