When the engine is started, the warning light and
audible warning remain on until air pressure in both
systems exceeds minimum pressure.
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. 3.11
, 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 3.2
, 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.
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. 3.12
, displays the current engine oil pressure. If
engine oil pressure falls below the minimum levels
shown in
Table 3.1
, 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.
Fuel Gauge, Pre-EPA10
Pre-EPA10-compliant vehicles have a fuel level
gauge indicating the level of diesel in the fuel tank(s).
See
Fig. 3.13
. A single fuel gauge is standard. If
equipped with an optional second fuel gauge, each
fuel tank level is indicated on a separate gauge.
05/14/2001
f610556
Fig. 3.10, Air Pressure Gauge (reservoir A shown)
10/09/2001
f610565
WATER
100
150
200
250
F°
Fig. 3.11, Coolant Temperature Gauge
10/09/2001
0
100
50
PSI
OIL
f610528
Fig. 3.12, Engine Oil Pressure Gauge
Instruments
3.10