There is a spring on the brake mechanism that usually breaks around 500,000 mls or so. You could buy another but, I never bothered as it works fine without it. If you pull the kickplate to adjust the switch you'll probably find the pieces of that spring.
Hello people!
take a look at Service Bulletin Trucks. Date 8'2013 group 524 n. 1 release 2.
Full instructions on how to adjust switch and The Pedal!.
Everything works fine and easy. If you like lying on your back with your feet hang out the door.