PART 8: MAINTENANCE AND SERVICE
Air System
Load Distribution:
Be sure any load you carry is dis-
tributed so that no axle has to support more than its load
limit.
Air System
WARNING!
• Prior to the removal of any air system com-
ponent, always block and hold the vehicle by
a secure means other than the vehicle’s own
brakes. Depleting air system pressure may
cause vehicle to roll. Keep hands away from
chamber push rods and slack adjusters, they
may apply as system pressure drops.
• After completing any repairs to the air sys-
tem, always test for air leaks, and check the
brakes for safe operation before putting the
vehicle in service.
• Never connect or disconnect a hose or line
containing air pressure. It may whip as air
escapes. Never remove a component or pipe
plug unless you are certain all system pres-
sure has been depleted.
• Never exceed recommended air pressure
and always wear safety glasses when work-
ing with air pressure. Never look into air jets
or direct them at anyone.
• Never attempt to disassemble a component
until you have read and understood rec-
ommended procedures. Some components
contain powerful springs and injury can re-
sult if not properly disassembled. Use only
proper tools and observe all precautions
pertaining to use of those tools
• Completely bypassing a Bendix AD-IS air
dryer will bypass the system’s pressure
protection valves. This could lead to loss
of air pressure or damage to the vehicle’s
air system, which could cause an accident
or personal injury.
Always adhere to the
manufacturer’s procedure if it is necessary
in an emergency to temporarily bypass an
AD-IS-series air dryer.
The operation of the vehicle’s braking system and many
vehicle accessories depends upon the storage and appli-
cation of a high-pressure air supply.
Your vehicle’s compressor takes outside air and com-
presses it, usually to 100-120 psi. The compressed air
R(08/07)
Y53-6015
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Summary of Contents for Peterbilt 320
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Page 210: ...PART 11 SUBJECT INDEX Windshield Washer Reservoir 29 206 Y53 6015 R 08 07 ...
Page 212: ...Peterbilt Motors Company P O Box 90208 Denton Texas 76202 ...