2-16
Radiator Shutters -- Caterpillar
R
(If Equipped)
Radiator shutters aid engine warm-up by blocking the
airflow through the radiator and charge the air cooler to
conserve heat in cold conditions.
The radiator shutters on your vehicle (if equipped)
operate automatically. When the ignition switch is in
ON or START and the engine temperature is below
195
_
F (90
_
C), the shutters will close, blocking the flow
of air through the radiator and charge the air cooler.
When the engine temperature reaches 195
_
F (90
_
C), the
shutters will open to the normal operating position.
Engine Checks Before Operating
When you’ve started your engine, let it run for 20 to
30 seconds before you put a load on the engine. But
don’t leave the vehicle while the engine is running.
During this warm
-up period, check your warning lights
and gages:
D
If oil pressure doesn’t begin to rise within
15 seconds of starting, stop the engine and find
the cause.
D
If the engine coolant temperature gage needle goes
into the hot area on the gage, stop the engine and
find the cause of the overheating.
D
If you have air brakes, the dual
-needle air pressure
gage should read at least 105 psi (720 kPa) for both
service systems before you try to move the vehicle.
When air pressure is below 60 psi (420 kPa), the
LOW AIR light will come on and you will hear a
tone alarm. If the pressure doesn’t build up or
drops during warm
-up, stop the engine and find
the cause before you try to move the vehicle.
Recommended air pressure before actually driving
away is 120 psi (830 kPa).
D
The charging system light should come on when the
ignition key is turned to ON or START and should
go out when the engine is running above idle. If the
light doesn’t go out or comes back on during normal
engine operation, have the charging system checked
right away. (This light tells you if the generator is
not charging; it doesn’t reflect the condition of
the battery.)
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