[harley92]

Hi Ron,
I am doing a 37-620 which is about the same for the RF unit.
I have found an easier way to remove the RF chassis without removing the band switch shaft assembly.
After you remove the tuning dial mechanism as you have described and disconnected all wires going to the RF chassis, Just remove the eight 1/4 inch screws holding the front chassis plate and remove it with the volume control shaft attached (keeping track of the shaft clip on the volume control). Then remove the rear tuning chassis screw and rubber washers. The RF chassis will now tilt upward as you describe and slide forward without messing with the band switch shaft removal. This leaves a nice wide opening for filter rebuild and parts replacement.
Hope this helps.