Parking Brake Control Valve; Tag Axle Control Valve - PREVOST H3-45 VIP Owner's Manual

level above the axles, indifferent of road conditions
or vehicle weight.
NOTE
Prevost vehicles are designed to operate within
specific weight load/ranges for each axle (GAW)
and for total vehicle weight (GVW). If the coach is
heavier than the design limits, Level Low System
(LLS) components damage and problems can
occur..
When parked, and ONLY when parked, the level of
the vehicle can be manually adjusted within the
range of travel of the air springs. Thus, if the vehicle
is parked on uneven ground, the manual override
leveling system can be used to level the chassis of
the vehicle.
With the engine running, turn the selector switch
located on L.H. side control panel to the area of the
vehicle requiring leveling, then press the rocker
switch accordingly (up or down) to inflate or deflate
the selected set of air springs.
The front position raises or lowers the front only and
does not tilt the vehicle to its sides. Each rear
position raises or lowers its respective side,
therefore, the rear positions can be used to tilt the
vehicle to one side or the other, or they can be used
to raise or lower the rear of the vehicle. When
leveling, it is often necessary to run the engine in
order to get an adequate air supply.
NOTE
For maximum ease of ingress and egress as well
as for maximum leveling range, lower the vehicle
completely before leveling.
NOTE
It is always better to first level the rear of the
vehicle (right to left) before raising or lowering the
front. After adjusting the rear, watch the level
indicator as you adjust the front. If the level
indicator shows that the vehicle is starting to tilt to
either side, stop adjusting the front as one of the air
springs has come to the end of its travel range.
After manual leveling, turn OFF the engine. The
vehicle will stay in the leveled position (the air is
"locked" in the air springs) as long as there are no air
leaks. The vehicle will hold this position for several
days. When engine is restarted, with the level
selector switch in the OFF position and air pressure
is adequate, the vehicle will automatically level itself
for driving conditions.
Do not drive the vehicle with the level low selector
switch in any position other than OFF, as this may
render the vehicle unsafe and uncontrollable.
If this is the case, the Level Low warning telltale
light in the dashboard will flash, reminding you that
the selector is not in the OFF position.
NOTE
If, for any reason, you wish to start the engine
without moving the vehicle (to warm up the engine
for instance) while keeping the vehicle in the manu-
ally leveled position, place selector switch in any
position except OFF. When ignition switch is
turned to the OFF position, reset the selector
switch to the OFF position.

PARKING BRAKE CONTROL VALVE

Spring-loaded parking brakes are applied by lifting
the safety cover (if present) and pulling up the control
valve knob. Push down to release brakes. Refer to
"EMERGENCY AND PARKING BRAKES" on
page 8

PARKING BRAKE CONTROL VALVE

TAG AXLE CONTROL VALVE

Lift the tag axle by pushing the lever forward. Pulling
the lever rearward will lower and load the tag axle.
Refer
Section 5 Other Features for additional information.
PA-1638 Owner's Manual X3-45 VIP
Controls and Instruments 4-13
DANGER
in Section 7 Safety Features and Equipment.
to"RETRACTABLE TAG AXLE" on page 29 in