Question 93
How should you check that the spring brakes come on when the air pressure in the system
drops below a certain level?
Park on a slight incline, drain off air pressure, set parking brakes and check for
movement.
Park on level ground, chock the wheels, release the parking brake when you
have enough air pressure, shut the engine off, and repeatedly press and release
the brake pedal.
Park on level ground, wait for normal air pressure, release tbe parking brake,
move the truck forward slowly, and apply the brakes firmly using the brake
pedal.