Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors

DASH- AND DOOR-MOUNTED FEATURES
(2) Trailer Air Supply
Control (Red)
(1) Parking Brake Control
(Yellow)
Combination (Tractor/Trailer) Parking Brake Control Valves
02394
2. Shift the transmission into its PARK position. (See
Pages 100 and 146 for transmission shifting and parking
brake information.)
3. Turn the key to OFF.
4. Remove the key.
WARNING! Do not pull out the parking brake
valve while the vehicle is moving. Stopping
with the parking brake controls can cause a
sudden wheel lock-up, loss of control, or
over-take by following vehicles possibly
resulting in an accident involving death or
personal injury
CONTROLS AND DISPLAY
WARNING! Before operating your vehicle after
it has been parked, do not forget to push in
the parking brake valve to release the parking
brakes. Failure to release your parking brakes
before putting the vehicle into motion can
cause fire or loss of control of the vehicle,
which can result in death or personal injury.
See “Using the Brake System” on page 104 for more information.
- for vehicles with hydraulic brakes:
The parking brake consists of a driveline drum brake actuated
by a lever and cable. The hand lever, mounted on the
vehicle's cab floor, pulls or releases the cable controlling
the brake. Pulling upward on the parking brake lever pulls
the cable and expands the driveline brake shoes outward
against the driveline brake drum.
The driveline brake is disengaged by pushing the handle
downward to its lowest position.
NOTE: Failure to fully release the parking brake
can cause the brakes to overheat.
– 64 – Y53-6027 Medium Duty (R05/09)