4-36 CONTROLS AND INSTRUMENTS
PA1628 H3-41, H3-45 Operator’s Manual
ANALOG INDICATORS
06728
Tachometer (rpm x 100)
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.
06729
Speedometer (mph, km/h)
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 for further details.
06730
Turbo boost pressure (psi)
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.
Summary of Contents for H 2018 Series
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