Under heavy loads, such as when climbing steep
grades, temperatures that exceed the normal oil tem-
perature range for a short period are not unusual. If
the temperature returns to normal when the load de-
creases, there is no problem.
Turbocharger Boost Pressure Gauge
The turbocharger boost pressure gauge (Fig. 3.23)
indicates the pressure in the intake manifold, in ex-
cess of atmospheric pressure, being created by the
turbocharger.
Transmission Oil Temperature Gauge
The transmission oil temperature gauge, (Fig. 3.23)
measures the transmission lubricant operating tem-
perature. Temperatures vary by application, but the
transmission fluid temperature gauge reading should
not exceed 250°F (121°C).
NOTICE
A sudden increase in transmission fluid tempera-
ture that is not caused by a load increase may
indicate mechanical failure. Bring the vehicle to a
safe stop and investigate the cause to 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 tem-
perature range for a short period are not unusual. If
the temperature returns to normal when the load de-
creases, there is no problem.
Drive Axle Oil Temperature Gauges
NOTICE
A sudden increase in oil temperature that is not
caused by a load increase may indicate mechani-
cal failure. Bring the vehicle to a safe stop and
investigate the cause to prevent further damage.
Do not operate the vehicle until the cause has
been determined and corrected.
During normal operation, drive axle oil temperature
gauges (see
Fig. 3.24) should read as follows:
•
160 to 220°F (71 to 104°C) for Detroit
™
and
Meritor
™
drive axles
f61161504/30/2019
1
2 3
1. Engine Oil
Temperature
2. Turbo Boost Pressure
3. Transmission Oil
Temperature
Fig. 3.23, Digital Oil and Pressure Gauges - ICUC
f61161604/25/2019
1
2 3
1. Front Axle Oil
Temperature
2. Rear Axle Oil
Temperature
3. Application Air
Pressure
Fig. 3.24, Digital Oil and Pressure Gauges - ICUC
Instruments
3.13
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