PREVOST H3-41 - Page 46

CONTROLS AND INSTRUMENTS
“STOP Engine” telltale light, in this chapter.
An audible alert signal also informs the driver of
low oil pressure. Refer to Safety Features and
Equipment chapter for table of audible alerts.
Caution: Loss of oil pressure may cause
severe engine damage. If low oil pressure LED
illuminates, park the vehicle safely and stop the
engine immediately. Request service
assistance.
Engine Coolant Temperature
06231
Indicates the operating
temperature of the engine
coolant.
The normal reading
should be between 190°F and
222°F (88°C to 106°C).
A high coolant temperature
indicator LED
(bottom right corner of gauge) illuminates when
the coolant temperature rises above 223
o
F
(106
o
C). An audible alert signal also informs the
driver of this condition.
The engine protection system will start power
down Refer to Safety Features and Equipment
chapter for table of audible alerts.
Turbo Boost Pressure
06230
Indicates turbo boost pressure in
psi. Reading depends on engine
rpm and load conditions.
Tachometer
06221
Indicates the operating
speed of the engine in
hundreds of revolutions per
minute (rpm x 100). The
tachometer
serves as a
guide for gear shifting and
helps to prevent engine over-
speeding when
driving downhill with the JACOBS engine brake
operating. The maximum allowed engine speed
is 2,450 rpm.
Speedometer
06222
Indicates the vehicle speed
in miles per hour (mph) and
kilometers per hour (km/h).
The digital odometer records
the distance
traveled in miles or in kilometers (units are
driver selectable).
Voltmeter (24-Volt System)
06224
Indicates the condition of
the 24-
volt electrical
system. With the engine
running, the normal reading
should be between 26.5
and 28.0 volts.
Fuel Level
06225
Indicates the amount of fuel
remaining in the fuel tank.
A telltale light illuminates
when about 12 US gallons
(45 liters) of fuel remain in
the fuel tank.
Caution:
Operating the vehicle when the
reading is below 1/8 full is not recommended.
Accessories Air Pressure
06226
Indicates the accessories
air system pressure
. The
normal operating pressure
is from 95 to 125 psi (655 to
860 kPa).
Primary System Air Pressure (Rear)
06228
Indicates the primary air
system pressure. The
normal operating pressure
is from 95 to 125 psi (655 to
860 kPa).
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