freightliner M2 Plus 2023 Manual page 44

Instruments
01/02/2020
Fig. 3.43, Analog Tachometer - ICUC
Transmission Fluid Temperature
Gauge
The transmission fluid temperature gauge, measures
the transmission lubricant operating temperature.
See Fig. 3.44. Temperatures vary by application, but
the transmission fluid temperature gauge reading
should not exceed 250°F (121°C).
10/31/2016
Fig. 3.44, Transmission Fluid Temperature Gauge
NOTICE
A sudden increase in transmission fluid
temperature that is not caused by a load increase
may indicate mechanical failure. Bring the vehicle
to a safe stop and investigate the cause to
3.23
prevent further damage. Do not operate the
vehicle until the cause has been determined and
corrected.
Under heavy loads, such as when climbing steep
grades, temperatures that exceed the normal oil
temperature range for a short period are not unusual.
If the temperature returns to normal when the load
decreases, there is no problem.
Turbocharger Boost Pressure Gauge
A turbocharger boost pressure gauge indicates the
pressure in the intake manifold, in excess of
atmospheric pressure, being created by the
turbocharger. See
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10/31/2016
Fig. 3.45, Turbocharger Boost Pressure Gauge
Voltmeter
The voltmeter indicates the vehicle charging system
voltage when the engine is running and the battery
voltage when the engine is off. By monitoring the
voltmeter, the driver can stay aware of potential
battery charging problems and have them fixed
before the batteries discharge enough to create
starting difficulties.
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The voltmeter will normally show approximately 13.7
to 14.1 volts when the engine is running. The voltage
of a fully charged battery is 12.7 to 12.8 volts when
the engine is off. Battery voltage under 12.0 volts is
considered a low battery, and a completely
discharged battery will produce only about 11.0 volts.
If the voltmeter shows an undercharged or
overcharged condition for an extended period, have
Fig. 3.45.
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