i fished a peice of #12 solid wire in the one hole on the face, around the shaft, and out the other hole, made a about a 2 foot loop, and twisted it together, pull hard on it, while hitting a peice of wood against the shaft to keep from buggering it up, and it came off, i did mine with the motor out, lifted it by the wire, and the weight of the motor was enuf to do it, while smacking the wood/shaft. but you may be able to sit down and put both feet against the frame, pull hard while someone smacks the shaft, or flip it on its side and partially hang it from something to apply the weight to it???
but it can be done