Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
Regional Haul Model Operator's Manual - Peterbilt Motors Company
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PREVENTIVE MAINTENANCE<br />
Air System<br />
Introduction<br />
WARNING! Prior to the removal of any air system<br />
component, always block and hold the<br />
vehicle by a secure means other than the<br />
vehicle's own brakes. Depleting air system<br />
pressure may cause the vehicle to roll unexpectedly<br />
resulting in an accident causing<br />
death or injuries. Keep hands away from<br />
chamber push rods and slack adjusters, they<br />
may apply as system pressure drops.<br />
• Never connect or disconnect a hose or line<br />
containing air pressure. It may whip as air<br />
escapes. Never remove a component or pipe<br />
plug unless you are certain all system pressure<br />
has been depleted.<br />
• Never exceed recommended air pressure<br />
and always wear safety glasses when working<br />
with air pressure. Never look into air jets<br />
or direct them at anyone.<br />
• Never attempt to disassemble a component<br />
until you have read and understood recommended<br />
procedures. Some components<br />
contain powerful springs and injury or death<br />
AIR SYSTEM<br />
can result if not properly disassembled. Use<br />
only proper tools and observe all precautions<br />
pertaining to the use of those tools.<br />
• Completely bypassing a Bendix AD-IS air<br />
dryer will bypass the system’s pressure protection<br />
valves. This could lead to loss of air<br />
pressure or damage to the vehicle’s air system,<br />
which could cause an accident involving<br />
death or personal injury. Always adhere<br />
to the manufacturer’s procedure if it is necessary<br />
in an emergency to temporarily<br />
bypass an AD-IS-series air dryer.<br />
WARNING! Do not release the parking brake<br />
or attempt to move the vehicle until air pressure<br />
in both circuits is at least 100 psi (690<br />
kPa), the level required for normal brake operation.<br />
• Do not use the trailer hand brake control to<br />
hold vehicle while parked. This control utilizes<br />
air pressure for brake application.<br />
Because acceptable air leakage levels cause<br />
all truck air systems to gradually lose pressure,<br />
vehicle rollaway could occur, resulting<br />
in an accident and death or injuries.<br />
<strong>Regional</strong> <strong>Haul</strong> (R05/10) Y53-6033 – 189 –