PREVOST X3-45 VIP 2017, Owner'S Manual

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Controls and Instruments 4-29
ANALOG INDICATORS
Tachometer (rpm x 100)
06728
Indicates the operating speed of the engine in hundreds of
revolutions per minute. The tachometer serves as a guide for
gear shifting and helps to
prevent
engine over-speeding when
driving downhill with the engine brake operating. Use the
green field for normal driving (1000 to 1600 rpm).
CAUTION
Never allow the engine to go into the red field. This could
lead to severe engine damage.
Speedometer (mph, km/h)
06729
Indicates the vehicle speed in miles per hour (mph) and
kilometers per hour (km/h). The LEDs above the instrument
work in conjunction with AWARE Adaptive Cruise Braking
(ACB) system. Refer to “Prevost AWARE Adaptive Cruise
Braking” paragraph.
Turbo Boost Pressure (PSI)
06730
Indicates the turbo boost pressure in psi. This pressure should
be the same at a given engine temperature, speed, and load.
An unusual reading could indicate an engine failure.
Engine Coolant Temperature (°F)
06731
Indicates the operating temperature of the engine coolant in °f.
The normal reading should be between 170°f and 222°f (80°c
to 106°c).
The temperature limit is dependent on the electronic program
for the engine model. When coolant temperature is excessive,
the stop telltale light turns on, an audible alarm sounds and a
pop-up message appears on the DID. The engine protection
system will automatically derate and stop the engine in 30
seconds. Stop at the first safe place where the problem can be