Hi Del
Check nothing is jamming the belts or the belt is not over loaded
If that is ok then the motor will be a TEFC try to remove the fan cover
if you can remove the screws and the fan cover gently turn the plastic
fan clock wise or anti clock wise (difficult to turn) stop
sometimes the screws on the fan cover are very difficult if so leave them and go for
splitting the motor and gearbox 3 or 4 hex headed screws
with the motor and gearbox split see the motor turns free
if so power the motor if it runs the gearbox or belt spindle is the problem
if the motor does not run then the motor is u/s