Regional Haul Model Operator's Manual - Peterbilt Motors Company

BRAKE COMPONENTS
ABS Warning Lamp
The ABS warning lamp will come on briefly, then go off,
when the key switch is first turned on. If the lamp remains
ON until a speed of 4 mph (6 km/h) is reached, then goes
OFF, there may be a stored fault code. If the lamp
remains ON when a speed in excess of 4 mph (6 km/h) is
reached, there may be an active fault in the ABS system.
CAUTION: If the ABS warning light does not
illuminate when the ignition is first turned on,
there is a problem with the bulb or wiring. You
should have this checked as soon as possible.
WARNING! No indication will be given via the
dashboard warning lights or buzzer if tires of
the wrong size are installed on your vehicle.
The Anti-Lock Brake System (ABS) is calibrated
for the specific tire revolutions per
mile. Use of a tire and/or wheel size different
from that originally installed on your vehicle
may cause the ABS system to not function
during a hard braking event. This could cause
an accident, resulting in death or personal
injury. Consult with your Peterbilt dealer
before using a different tire and/or wheel size
than was originally installed on your vehicle.
STARTING AND OPERATING THE VEHICLE
Parking Brake Burnishing
WARNING! If a new drum or new brake shoes
are installed, the driveline brake must be burnished.
Failure to properly burnish the parking
brake before putting it in service could
result in an inoperative parking brake, possible
vehicle rollaway, and death, personal
injury or damage to the vehicle.
This procedure is recommended for new vehicles where
less lever actuation force is required. This procedure is
mandatory whenever the driveline brake shoes or brake
drum are replaced.
1. Drive the vehicle at 15 mph (24 km/h) in a low gear
(first or second) on a dry, hard road surface.
2. Apply the parking brake lever with a moderate force
(approximately 40 pounds) until the vehicle is
brought to a stop. Do not allow the wheels to lock
up.
3. After stopping, release the parking brake lever and
drive the vehicle at 20 mph (32 km/h) in a low gear
for approximately 2.5 miles, to allow the brake drum
to cool.
– 118 – Y53-6033 Regional Haul (R05/10)