Take off the blade cover.

Take off the blades and take out the blade holder clip.

Take out the screw at the bottom.

Gently pry open the case while paying attention not to break the plastic latches connecting the top and the bottom halves of the case.

carefully separate the metallic looking grip covers

Disconnect the switch from the circuit (white lever)

Take off the wheel and the connection to the blade cover.

unscrew the motor cover and take it off