Medium Duty Operator's Manual - Peterbilt Motors Company

STARTING AND OPERATING THE VEHICLE
Shut–Down
Introduction
After you have parked in a safe place, check your vehicle
to make sure it will be ready for the next trip. To make sure
your vehicle is ready to go after a long stop (such as overnight),
please follow the suggestions below. Your vehicle
will be easier to get going when you are ready, and it will
be safer for everyone who might be around it.
Please remember, too, that in some states it is illegal to
leave the engine running and the vehicle unattended.
SHUT–DOWN
WARNING! Do not use the trailer hand brake
or service brakes to park and hold an unattended
vehicle—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.
2. If you must park on a steep grade, always block the
wheels.
Final Stopping Procedures
1. Set the parking brake before leaving the driver's seat.
To hold your vehicle while it is parked, DO NOT rely on
the following:
• air brakes
• hand control valve for trailer brakes
• engine compression
Always use your parking brakes!
Blocked Wheels
02440
Medium Duty (R05/09) Y53-6008A – 143 –