Unplug your unit from the power supply 
Remove the service door under the hopper 
Disconnect the wires of the temperature probe, igniter, fan and motor respectively 
Remove the setting screw for the ground wire, and then unplug the power cord from the bracket 
Remove four screws in front and back of hopper, and then remove the hopper completely
Remove the screws and auger motor, then replace with the new
Reinstall and lock the hopper 
Pass the power cord through hole 1 and then lock the ground wire 
Connect the wires and secure them 
Reinstall the service door under the hopper