I can't recall for sure if I had an allen screw to remove first. I used a small drill bite and drilled into the center of the motor shaft. Stepped up the drill bite size and continued to increase the hole size. Before I got close to the plastic, I created enough heat and the drilled metal motor shaft slipped out of the plastic fan with no fan damage.
Replaced motor for about $85.
87' 300SDL 293,000
blower fan repair around 260,000