Air System Emergency Fill Valve; Combined Emergency And Parking Brakes - PREVOST H3-41 Manual

AIR SYSTEM
EMERGENCY FILL VALVE
The coach is equipped with two air system
emergency fill valves to supplement the air
system when air pressure is low and the engine
cannot be operated. One valve is located inside
the engine compartment near the R.H. access
door hinge. The other valve is located inside the
front service compartment.
FILL VALVE IN ENGINE COMPARTMENT
FILL VALVE IN FRONT SERVICE COMPARTMENT
Both air system emergency fill valves are fitted
with standard tire valve stems. The air systems
can be filled using any standard external air
supply line. The fill valve located in the engine
compartment supplies air
(brakes, suspension and accessories). The fill
valve located in the service compartment
supplies air for accessories only.
OEH3B614
OEH3B616
for all systems
6-4
EMERGENCY SAFETY FEATURES
CAUTION: AIR FILLED THROUGH THE
TWO EMERGENCY FILL VALVES WILL PASS
THROUGH THE STANDARD AIR FILTERING
SYSTEM. DO NOT FILL AIR AT ANY OTHER
LOCATION. DO NOT EXCEED 120 PSI (827
KPA).
COMBINED EMERGENCY AND
PARKING BRAKES
During normal operation, if air pressure in both
brake circuits drops below 40 psi (276 kPa),
spring-loaded emergency parking brakes will be
immediately applied at full capacity to the drive
axle wheels to stop the coach.
Spring-loaded parking brakes are applied by
pulling up the control valve knob located on the
R.H. lateral console.
Parking brakes are not designed to be used as
service brakes. For normal driving conditions,
the control valve knob must remain in the down
position.
NOTE: Only use the parking brakes
supplement the service brakes to stop the coach
in emergency conditions. The stopping distance
will be considerably longer than when using
normal service brakes.
NOTE: Before releasing the parking brakes by
pushing down the control valve knob, check the
pressure gauges to make sure that the brake
system air pressure is greater than or equal to
95 psi (655 kpa).
WARNING: ALWAYS APPLY THE PARKING
BRAKE BEFORE LEAVING THE DRIVER'S
SEAT.
A beep will sound if the ignition switch
NOTE:
has been turned off without applying the parking
brake. The same beep will sound if pressure is
still applied to the service brake pedal.
NOTE: The stoplights will automatically turn on
when the parking brake is applied and the
ignition key is turned to the ON position.
to