PREVOST X3-45 2011, Operator'S Manual

Page: 163 / 214

Care and Maintenance 157
If a tire reads +4 PSI and above , deflate by the
marked amount.
Relying on the TPMS system is better than
relying on a hand gage since the TPMS is
temperature compensated and remain accurate
no matter if the tires are cold or hot.
Tires take up to 3 hours to get down to ambient
temperature after a ride. A common mistake
consist of checking pressure while the tires have
not fully cooled down which leads into under-
inflated tires. Relying on the TPMS eliminate this
mistake.
Running tires at optimal pressure reduce tire
wear, improve safety and fuel economy.
NOTE
It is more accurate to use the TPMS display to
set the tire pressures than a pressure gauge.
WHEEL BEARINGS
Check wheel bearing cover for overheating
(especially after using the service brakes) during
fuel stops by touching the wheel bearing cover.
WARNING
If replacement tires are different from those
described on the certification plate, pressure
must be adjusted as requested in the Tire and
Rim Association Manual.
SERVICE BRAKE TEST
Check for correct pressure build-up. Stop
engine and check pressure gauge Pressure loss
should be imperceptible with engine stopped
and without brake pedal applied. Air loss should
not exceed 3 psi/minute (21 kPa/minute) with
engine stopped and brake pedal fully applied.
PARKING BRAKE TEST
Release parking/emergency brake. Pump
service brake pedal until air pressure drops to
65 psi (448 kPa). Make sure the warning buzzer
operates and that the emergency brakes apply
(the control valve knob lifts up). Allow air
pressure to reach 95 psi (655 kPa) before
releasing parking brake.
Driving the vehicle while the parking brake is
applied should not be possible.
EXTERIOR LIGHTING VERIFICATION
Exterior Lighting Test Mode
This useful function allows quick verification of
the vehicle exterior lights.
•
Activating the test mode:
When the vehicle is stationary (parking brake
applied), pull up the multi-function lever 3 times
within 3 seconds to activate the test mode. This
test can be done when the engine is not running
providing that the battery charge is sufficient
(above 24.0 volts).
The telltale panel alarm emits a sound each
second to remind that the test mode is in
progress.
•
Stopping the test mode:
To stop the test mode, pull up the multi-function
lever once or turn the ignition OFF or remove
the parking brake.
IMPORTANT NOTE
The test mode is useful to check the
functioning of the multiplex outputs and the
exterior lights. It doesn't test the functionality
of the commands related to the exterior
lighting. For a complete testing, the directional
signal commands, the headlights commands
and the brake pedal have to be checked
before. Once these commands tested,
activate the test mode to check the exterior
lighting.
•
Using the test mode:
First, test the functionality of the commands
related to the exterior lighting:
•
Activate the right directional signal and
check that the corresponding telltale
light illuminates.
•
Activate the left directional signal and
check that the corresponding telltale
light illuminates.
•
Press on the brake pedal and check that
the STOP telltale light illuminates.
Once these commands tested, activate the test
mode to check the exterior lighting by pulling up
the multi-function lever 3 times within 3 seconds.