Specifications

DASH- AND DOOR-MOUNTED FEATURES CONTROLS AND DISPLAY
– 62 – Y53-6008A
Medium Duty (R05/09)
2. Shift the transmission into its PARK position. (See
Pages 98 and 143 for transmission shifting and park-
ing 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. You could be
severely injured.
See “Using the Brake System” on page 101 for more infor-
mation.
- for vehicles with hydraulic brakes:
The parking brake consists of a driveline drum brake actu-
ated 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.
CAUTION: Unless it is an emergency, do not pull
upward on the parking brake lever while the
vehicle is moving. Attempting to stop with the
parking brake could cause damage to the drive-
line, transmission, or the parking brake mecha-
nism itself.
Using the Parking Brake
1. Come to a complete stop.
Combination (Tractor/Trailer) Parking Brake Control Valves
(2) Trailer Air Supply
Control (Red)
(1) Parking Brake Control
(Yellow)
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