Thank you for this response. I am hopeful of getting it fix.

I was able to figure out how to get to the elevation shaft. There is a brass bushing on the shaft that appears to go up as the crank is turned. I imagine the bushing raises the saw blade. However, the bushing does not go up when the crank is turned. If I put pressure on the bushing as the crank is turned the bushing goes up. It looks like the bushing is supposed to seat in the bottom of the shaft. The bushing has two indents on the top. There are two screws or set screws on the shaft housing. The indents seem to fit the circumference of the screws. Maybe there is a flange/was a flange on the bushing to which the screw covered flange on the bushing causing the saw blade to raise. There are two gears which cause the shaft to turn. It looks like the gear on the elevation shaft has to come off in order to get the shaft out. there is another gear on the crank which engages the gear on the elevator shaft. I can't get to the set screws holding either gear. The bushing that goes up and down on the elevator shaft is not on the blowout schematic for the parts on the parts list.