CONTROLS AND INSTRUMENTS
Engine Oil Pressure Gauge
06229
Indicates engine oil pressure.
The normal reading should be
between 50 and 70 psi (345 -
480 kPa) at 55 mph (90 km/h). A
low oil pressure indicator LED
(bottom right corner
) illuminates
when the oil pressure drops
below 50 psi (345 kPa).
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 Gauge
Indicates the operating
temperature of the engine
coolant. The normal reading
should be between 190°F and
215°F (88°C to 102°C).
Turbo Boost Pressure Gauge
Indicates turbo boost pressure in
psi. Reading depends on engine
rpm and load conditions.
Tachometer
Indicates the operating
speed of the engine in
hundreds of revolutions per
minute (rpm x 100).
The tachome
ter 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
Indicates the
in miles per hour (mph) and
kilometers per hour (km/h).
The digital odometer registers the distance
traveled in miles or in kilometers (units are
driver selectable).
Voltmeter (24-Volt System)
Indicat
the 24-
volt electrical
system. With the engine
running, the normal reading
and 28.0 volts.
Fuel Gauge
Indicates the amount of fuel
remaining in the fuel tank.
Caution: Op
erating the vehicle when the
reading is below 1/8 full is not recommended.
Air Pressure Gauge (Accessories)
Indicates the accessories
air system pressure. The
normal operating pressure
is from 95 to 125 psi (655 to
860 kPa).
Air Pressure Gauge (Primary System)
Indicates the primary air
system pressure. The
normal operating pressure
is from 95 to 125 psi (655 to
860 kPa).
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