PART 4: CONTROLS AND DISPLAYS
DASH-MOUNTED FEATURES
(R05/10)
Y53-6032
– 53 –
Parking Brake Valve and Trailer Air Supply
Valve
Your parking brake valve is a yellow diamond-shaped
knob located below the right instrument panel. It controls
the parking brakes.
To apply all parking brakes, pull the yellow, or parking
brake, knob out. The truck or tractor parking brakes will
set, and the Trailer Air Supply Valve (red octagon knob)
will automatically trip (“pop out”) and set the trailer parking
brakes. To release both truck/tractor and trailer parking
brakes, push in BOTH yellow and red knobs. For full infor-
mation on using parking brakes, see section titled
“Park-
ing Brakes and Their Use” on page 118
for more
information.
WARNING!
• Do not leave the cab without applying the
parking brake. The truck could roll and cause
an accident involving death or personal injury.
Always apply the parking brake before you
leave the cab
• 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
• Do not use the trailer hand brake or service
brakes to park and hold an unattended vehi-
cle—use the parking brakes. Because service
brakes work with air pressure, these brakes could
slowly release. Your vehicle could roll, causing a
serious accident. Someone could be hurt or
killed. Never rely on the service brakes to hold a
parked vehicle.
Y53-6032.book Page 53 Monday, May 24, 2010 3:37 PM
Summary of Contents for Peterbilt 587
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