•
180 to 225°F (82 to 107°C) for Cummins ISB
engines
•
177 to 203°F (81 to 95°C) for Mercedes-Benz
MBE900 engines
NOTE: Under heavy loads, such as when climb-
ing 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. See
Fig. 3.19.
Transmission Fluid Temperature
Gauge
During normal operation, the transmission fluid tem-
perature gauge reading should not exceed 250°F
(121°C) at the sump. See
Fig. 3.20.
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.
NOTE: Under heavy loads, such as when climb-
ing steep grades, temperatures may climb
above those given here for limited periods.
Turbocharger Boost Pressure Gauge
A turbocharger boost pressure gauge measures the
pressure in the intake manifold, in excess of atmos-
pheric pressure, being created by the turbocharger.
See
Fig. 3.21.
10/10/2001
f610569
Fig. 3.19, Engine Oil Temperature Gauge
10/30/2001
f610600
TRANS
125
350
F
275
200
Fig. 3.20, Transmission Fluid Temperature Gauge
10/10/2001
f610574
Fig. 3.21, Turbo Boost Pressure Gauge
Instruments
3.14
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