Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors
Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors
USING THE BRAKE SYSTEM 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. 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. STARTING AND OPERATING 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. 4. Repeat steps 1, 2, and 3 above until a total of 10 stops have been completed. 5. Adjust the parking brake lever. See the Medium Duty Maintenance Manual. – 126 – Y53-6027 Medium Duty (R05/09)
STARTING AND OPERATING THE VEHICLE OPERATING THE REAR/DRIVE AXLE Operating the Rear/Drive Axle Introduction This section covers the operation of your Rear/Drive Axle. These instructions apply to the most common features of drive axles. Refer to the manufacturer’s instructions for further information on the operation of your axle. If your vehicle is equipped with a Rockwell Tractech Nospin single rear axle, the wheel differential lock feature automatically engages and disengages. When one wheel starts to spin on a slippery surface, this rear axle feature engages to improve traction. Interaxle Differential Lock On vehicles with tandem rear axles, the interaxle differential allows each axle to turn independently. Differential action between the tandems relieves stress on the rear axles and reduces tire wear. The interaxle differential lock switch allows the operator to LOCK or UNLOCK the differential, depending on road surface conditions. When operating normally on paved, dry surfaces, keep your truck's interaxle differential in the UNLOCK position. SHIFT AT ANY SPEED EXCEPT IF A WHEEL IS SPINNING In the LOCK position, an air operated clutch positively locks both sets of axles together, providing greater traction on slippery road surfaces; however, steering around corners and on dry pavement is more difficult. Continuous operation on a paved, dry surface stresses the tandem axles, possibly causing internal damage. Use this feature only when driving on surfaces with poor traction, such as wet slippery roads, heavy mud or snow, or loose gravel. And do not use it when going downhill or at speeds greater than 25 mph (40 km/h). Lock the inter-axle differential when you encounter road conditions such as these: • Ice or snow — with or without tire chains. Medium Duty (R05/09) Y53-6027 – 127 –
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USING THE BRAKE SYSTEM<br />
WARNING! No indication will be given via the<br />
dashboard warning lights or buzzer if tires of<br />
the wrong size are installed on your vehicle.<br />
The Anti-Lock Brake System (ABS) is calibrated<br />
for the specific tire revolutions per<br />
mile. Use of a tire and/or wheel size different<br />
from that originally installed on your vehicle<br />
may cause the ABS system to not function<br />
during a hard braking event. This could cause<br />
an accident, resulting in death or personal<br />
injury. Consult with your <strong>Peterbilt</strong> dealer<br />
before using a different tire and/or wheel size<br />
than was originally installed on your vehicle.<br />
Parking Brake Burnishing<br />
WARNING! If a new drum or new brake shoes<br />
are installed, the driveline brake must be burnished.<br />
Failure to properly burnish the parking<br />
brake before putting it in service could<br />
result in an inoperative parking brake, possible<br />
vehicle rollaway, and death, personal<br />
injury or damage to the vehicle.<br />
STARTING AND OPERATING THE VEHICLE<br />
This procedure is recommended for new vehicles where<br />
less lever actuation force is required. This procedure is<br />
mandatory whenever the driveline brake shoes or brake<br />
drum are replaced.<br />
1. Drive the vehicle at 15 mph (24 km/h) in a low gear<br />
(first or second) on a dry, hard road surface.<br />
2. Apply the parking brake lever with a moderate force<br />
(approximately 40 pounds) until the vehicle is<br />
brought to a stop. Do not allow the wheels to lock up.<br />
3. After stopping, release the parking brake lever and<br />
drive the vehicle at 20 mph (32 km/h) in a low gear<br />
for approximately 2.5 miles, to allow the brake drum<br />
to cool.<br />
4. Repeat steps 1, 2, and 3 above until a total of 10<br />
stops have been completed.<br />
5. Adjust the parking brake lever. See the <strong>Medium</strong> <strong>Duty</strong><br />
Maintenance <strong>Manual</strong>.<br />
– 126 – Y53-6027 <strong>Medium</strong> <strong>Duty</strong> (R05/09)