PART 8: MAINTENANCE AND SERVICE
YOUR VEHICLE’S AIR SYSTEM
(R05/10)
Y53-6032
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truck and trailer brakes. That is why, when you push down
on your brake pedal, you don’t feel the same amount of
pressure on the pedal that you do when you apply the
brakes on your car. All you are doing on your truck is
opening an air valve to allow air to flow into the brake
chambers.
Air Supply System
WARNING! Do not operate the vehicle if leak-
age in the air system is detected. Conduct the
following procedure and contact an autho-
rized Peterbilt Dealer (or any other properly
equipped service center) if a leak is detected.
Failure to check the brakes or follow these
procedures could cause a system failure,
increasing the risk of an accident involving
death or personal injury.
Contamination of the air supply system is the major cause
of problems in air-operated components such as brake
valves, wiper motors, and suspension height control
valves. To keep contaminants to the lowest possible level,
follow these maintenance procedures.
WARNING!
If the supply and service tanks are
not drained at the recommended frequency,
water could be sent to all air lines and valves.
This could cause corrosion, which could com-
promise the brake system safety and potentially
cause an accident involving death or personal
injury.
Daily
• Drain moisture from the supply and service air tanks.
• Operate air devices to circulate lubricants within the
unit.
Periodically
• Clean filter screens ahead of the valves by removing
the screens and soaking them in solvent. Blow them
dry with pressurized air before reinstalling them.
Twice a Year
• Add approximately 1/4 oz. (7.5 ml) of light viscosity
lubricant to the air line leading to the wiper motor.
Acceptable lubricants are Dow Corning 200 fluid, 200
CS viscosity, and Sprague Wiper Lube. If you have
alcohol dryers installed in the air system, the alcohol
can wash away lubricants from the wiper motors.
Y53-6032.book Page 189 Monday, May 24, 2010 3:37 PM
Summary of Contents for Peterbilt 587
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