Parking Brakes Control Valve (7); Tag Axle Control Valve (8) - PREVOST X3-45 VIP 2015 Owner's Manual

4-8 Controls and Instruments
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.
DANGER
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 manually 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 BRAKES CONTROL VALVE (7)

Spring-loaded parking brakes are applied by
pulling up the control valve knob and protector
assembly. Lift the safety cover and push down
to release brakes. Refer to "Emergency and
Parking Brakes" in
Features and Safety Equipment".

TAG AXLE CONTROL VALVE (8)

Lift the tag axle by pushing the lever forward.
Pulling the lever back will lower the tag axle.
Refer to "Other Features" chapter for additional
information.
CONTROL VALVES
"Chapter: Emergency
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