freightliner BUSINESS CLASS M2, Руководство пользователя

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Coolant Temperature Gauge
NOTICE
A sudden increase in coolant temperature may
indicate engine or cooling system failure. Bring
the vehicle to a safe stop and investigate the
cause to prevent further damage. Do not operate
the engine until the cause has been determined
and corrected.
During normal engine operation, the coolant tem-
perature gauge, as shown in
Fig. 3.9 , should read
175 to 195°F (79 to 91°C). If the temperature re-
mains below 160°F (71°C), inspect the cooling sys-
tem to determine the cause.
If coolant temperature rises above the maximum
temperature listed in
Table 3.3 , the CHECK engine
lamp will illuminate. If the condition does not im-
prove, the STOP engine lamp will also illuminate and
an audible warning will sound. The engine will then
derate or shut down, depending on the type of en-
gine protection system installed.
Maximum Coolant Temperature
Engine Make Temperature: °F (°C)
Caterpillar 230 (110)
Cummins 225 (107)
Detroit 215 (101)
Mercedes-Benz 222 (105)
Table 3.3, Maximum Coolant Temperature
Engine Oil Pressure Gauge
NOTICE
A sudden decrease or absence of oil pressure
may indicate mechanical failure. Bring the vehicle
to a safe stop and investigate the cause to pre-
vent further damage. Do not operate the engine
until the cause has been determined and cor-
rected.
The engine oil pressure gauge, as shown in
Fig. 3.10 , displays the current engine oil pressure. If
engine oil pressure falls below the minimum levels
shown in
Table 3.4 , the CHECK engine lamp will illu-
minate. If the condition does not improve, the STOP
engine lamp will also illuminate and an audible warn-
ing will sound. The engine will then derate or shut
down, depending on the type of engine protection
system installed.
Minimum Oil Pressure *
Engine Model
At Idle Speed:
psi (kPa)
At Rated RPM:
psi (kPa)
Caterpillar 10–20 (69–138) 30–45 (207–310)
Cummins 15 (103) 35 (241)
Detroit 14 (97) 55 (350)
Mercedes-Benz 7 (50) 36 (250)
*
Oil pressures are given with the engine at operating temperature. With
the engine cold, oil pressure may be higher. Individual engines may vary
from the listed pressures; observe and record pressures when the engine
is new to create a guide for checking engine condition.
Table 3.4, Minimum Oil Pressure
10/09/2001 f610565
WATER
100
150 200
250
F°
Fig. 3.9, Coolant Temperature Gauge
10/09/2001
0 100
50
PSI
OIL
f610528
Fig. 3.10, Engine Oil Pressure Gauge
Instruments
3.11