Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
Peterbilt Medium Duty Trucks Operator's Manual after 1-07
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Preventive Maintenance<br />
BRAKE SYSTEM<br />
If your truck has an air brake system, see the pages below.<br />
Brake System<br />
All of the following areas are interrelated and must conform<br />
to original specifications:<br />
If your truck has a hydraulic brake system, please go to<br />
“Hydraulic Brake System” on page 153.<br />
Introduction<br />
• tire size<br />
• wedge angle<br />
• brake linings<br />
• slack adjusters<br />
• cam radius<br />
• drum radius<br />
• brake chambers<br />
To operate your vehicle safely, you need some understanding<br />
of its brake systems. Brake adjustment and brake balance<br />
must be set carefully to allow equal stopping forces at all<br />
wheels. Tires are also a very important part of the whole system.<br />
How fast you can stop depends on how much friction<br />
there is between the road and your tires.<br />
CAUTION: The air brake system of this vehicle<br />
was configured for ONE of the following operations:<br />
tractor or truck, and complies with the<br />
respective portions of FMVSS 121. A tractor<br />
shall not be operated or configured as a truck,<br />
nor shall a truck be operated or configured as a<br />
tractor, without significant modifications to the<br />
air brake system in order to retain compliance<br />
with FMVSS 121. Contact your <strong>Peterbilt</strong> dealer<br />
for instructions.<br />
Once a brake system is set to specifications, changing any<br />
one of its components or any combination of components<br />
may degrade the system. All parts have to work together to<br />
perform as they should.<br />
Because your brake system is air operated, see the following<br />
section “Air System” on page 160 for more information on<br />
checking your brakes.<br />
Any replacement components in the brake system should be<br />
the same or better than the original components. Any<br />
changes from the original specifications can affect the performance<br />
of the entire system.<br />
<strong>Medium</strong> <strong>Duty</strong> (R10/06) Y53-6008 – 149 –