Operation
Air Dryer
The function of the air dryer is to collect and remove moisture
and contaminants before the compressed air reaches the air
reservoirs.
This protects the air system components from
malfunctioning including blockage, corrosion, and freezing.
For air tank draining requirements, refer to the Maintenance
Instructions section as well as local regulations.
The air dryer is installed in the discharge line between the air
compressor and the air system reservoirs. The air dryer includes
a replaceable desiccant cartridge and oil blocking filter that is
periodically serviced. It also may include a heater to prevent the
discharge valve from freezing in cold weather.
Trailer Brake Hand Control
WARNING
To prevent property damage, personal injury, and
/ or death, the hand control valve should never be
used to apply the trailer brakes when the tractor
and trailer are parked. Air pressure may leak from
the system, and the vehicle could roll away.
The trailer brake hand control is used to apply the trailer service
brakes, independently of the tractor service brakes. The trailer
brake hand control operates a valve that provides gradual control
of air pressure applied to the trailer service brakes. The trailer
service brakes can be fully or partially applied, but when in a
partial position, can be overridden by pressing fully on the brake
pedal.
To apply the trailer service brakes utilizing the hand control,
move the lever clockwise (down). The further the handle is
moved clockwise, the greater the air pressure applied to the
trailer brakes.
The trailer hand brake handle will remain in
place with the desired brake pressure applied until the handle
is manually moved. To release the trailer brakes, move handle
counterclockwise (up) until trailer moves freely.
Trailer Air Supply and Parking Brake Modular Controls
•
TRAILER AIR SUPPLY (RED octagonal knob)
•
PARKING BRAKE (YELLOW diamond knob)
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Summary of Contents for ProStar+
Page 4: ......
Page 24: ...Foreword 12...
Page 38: ...Model Description 26...
Page 74: ...Controls Features Declination Zone Map 62...
Page 98: ...Controls Features Center Dash Panel Wing Panel 86...
Page 118: ...Controls Features 106...
Page 243: ...Maintenance Instructions 231...
Page 286: ...Maintenance Intervals and Specifications 274...