Blue Bird M380 2003, Owner'S Manual

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4-15 – Interior and Exterior Systems Operation – Air Pressure System_______________________M380 Owner’s Manual
4-15-2 Rev. “F”
4-15.1.4 Anti-Lock Brakes
In addition to the above, a four-channel anti-lock brake system for the steer and drives axles are
installed. In the event one of the wheels begins to lock up under severe braking conditions, the anti-
lock system will detect this situation and gradually remove air pressure from the brake chamber until
the wheel begins to turn. This will help assure smooth braking action and minimize wheel lockup.
4-15.1.5 Air Suspension System
Air suspension bags cushion the front and rear axles. Ride height is automatically maintained by
height control valves. Dumping these air bags when the vehicle is parked allows the rubber bumpers
to come together and eliminate vehicle springiness. A switch, located on the lower left side of the
LOWER DASH PANEL, controls dumping and filling of air bags. The SUSP. DUMP switch controls
the front and rear suspension.
NOTE: The accessory air tank must contain at least 65 psi pressure for the DUMP switch to
function. The accessory air tank pressure does not register on the dash air pressure gauges.
Moving the SUSP. DUMP switch away from the UP position applies air pressure to air pilot-operated
valves on the suspension system. The pilot air shifts the valves, cutting off the air supply to the air
bags and allows the air in the bags to escape. After the suspension system has been dumped and
the ignition is turned on, a buzzer and a warning pilot light is illuminated on the dash to warn the
driver that the system is dumped and not to drive the vehicle until the SUSP. DUMP switch is set to
the UP position.
Refer to the manual in your owner’s kit for additional information and maintenance instructions.
4-15.1.6 Additional Air-Operated Equipment
Besides providing the compressed air supply for the motor home braking and suspension systems,
the compressor also provides the air supply for the stepwell cover and entrance door lock, all via
separately controlled solenoid switches operated from the dash, or at other locations throughout the
motor home. (This compressed air source is furnished from the front right side reservoir.) A
compressed air outlet fitting and air gun are contained in a rear storage compartment on the road side
of the motor home, convenient for inflating tires, and so on. A Schrader valve (air connection) is
available in the engine compartment to allow the air system to be pressurized from a “shop” source
without the necessity of starting the engine.