Emergency And Parking Brakes; Vehicle Jacking Points; Hydraulic Jack - PREVOST H3-45 2023 Operator's Manual

FIGURE 15: FRONT SERVICE COMPARTMENT AIR-FILL
VALVE
FIGURE 16: ENGINE COMPARTMENT AIR-FILL VALVE

EMERGENCY AND PARKING BRAKES

During normal operation, if air pressure in any
brake circuit drops below 60 psi (414 kPa),
spring- loaded emergency
immediately applied at full capacity to the drive
axle wheels to stop the vehicle.
Spring-loaded parking brake is applied by pulling
up the control valve knob located on the L.H.
lateral console.
Parking brake is not designed to be used as a
service brake. For normal driving conditions, the
control valve knob must remain depressed.
WARNING
Always apply the parking brake before leaving
the driver's seat.
brake will be
PA-1652 Operator's Manual H3-45 Coach
Safety Features and Equipment 7-9
NOTE
Only use the parking brake to supplement the
service brake to stop the vehicle in emergency
conditions. The stopping distance will be
considerably longer than when using normal
service brake.
NOTE
Before releasing the parking brake by pushing
down the control valve knob, check the
pressure gages to make sure that the brake
system air pressure is greater than or equal to
95 psi (655 kPa).
NOTE
The alarm will sound if the ignition switch has
been turned to OFF without applying the
parking brake. The same beep will sound if
pressure is still applied to the service brake
pedal.
NOTE
The stop lights automatically turn on when the
parking brake is applied and the engine is
running.

VEHICLE JACKING POINTS

For detailed instructions, refer to Maintenance
information MI18- 18 , available on the technical
publications website.

HYDRAULIC JACK

To raise : turn release valve clockwise. Insert
handle in socket and raise vehicle by pumping.
To lower: remove handle and turn the release
valve slowly counterclockwise.
Always keep ram and extension screw retracted
when jack is not in use.
Service: Check oil level when jack fails to raise to
full height. Lower ram completely with release
valve open and jack in upright position, remove
filler plug and refill to level of filler hole with
hydraulic jack oil. Never use brake fluid.