operators_manual

damage, do not let the pointer exceed
maximum governed speed. (See your
Engine Operation and Maintenance
Manual for rpm recommendations.)
Optimal RPM Indicator
Information about the optimal fuel economy
indicator.
The tachometer will illuminate a small
green light just below the numbers of the
gauge. This is to indicate the engine speed
for optimal fuel economy.
Engine - Coolant Temperature
The water temperature gauge shows the
temperature of the engine coolant.
Under normal operating conditions the
water temperature gauge should register
between 165° and 205°F (74° and 90°C).
Under certain conditions, somewhat higher
temperatures may be acceptable. But the
maximum allowable temperature is 210°F
(99°C), except for certain special engines.
Check your engine manual to be sure.
Related tasks
Fuel Level
The Fuel gauge indicates the total
(approximate) amount of fuel in the fuel
tank.
In addition to indicating empty and full, the
gauge(s) also indicate the fuel level in
graduated increments. When the fuel level
for the tank is below 1/4 full, a red warning
light in the gauge will come on.
WARNING
Do not carry additional fuel containers
in your vehicle. Fuel containers, either
full or empty, may leak, explode, and
cause or feed a fire. Do not carry extra
fuel containers. Even empty ones are
dangerous. Failure to comply may re-
sult in death or personal injury.
WARNING
Diesel fuel in the presence of an igni-
tion source could cause an explosion.
A mixture of gasoline or alcohol with
diesel fuel increases this risk of explo-
sion. Do not remove a fuel tank cap
near an open flame. Use only the fuel
and/or additives recommended for
your engine. Failure to comply may re-
sult in death, personal injury, equip-
ment or property damage.
CAUTION
Use only Ultra Low Sulfur Diesel
(ULSD) Fuel, as recommended by en-
gine manufacturers. If you need further
information on fuel specifications, con-
sult the Engine Operation and Mainte-
nance Manual.
CONTROLS - Instrument Cluster
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