TM 10-3930-653-14&P PARKING BRAKE The parking brake is the mechanical, internal expansion type and built in the wheel brake.  The brake shoes and brake  drum  are  commonly  used  with  the  wheel  brake  system.    As  the  parking  brake  lever  is  pulled.    the  parking  brake lever pushes the strut to the right with the pin (E) as a fulcrum, forcing the secondary shoe against the brake drum 4-226