Monitoring Systems and Cab Features
Engine Coolant Heater Switch
NOTE: The engine coolant heater switch is always
installed on the machine. If the machine is equipped
with the optional arctic starting system, the engine
coolant heater switch is functional. If the machine is
not equipped with the optional arctic starting system,
the engine coolant heater switch is not functional.
Do not operate the engine coolant heater in an
enclosed area. The heater produces combustion
gases which may be harmful to your health.
Always start and operate the heater in a well-
ventilated area and, if in an enclosed area, vent the
exhaust to the outside.
Improper use of the engine coolant heater can
create a fire or cause an explosion. Do not operate
the engine coolant heater while the machine is
being refueled. Do not place combustible materials
within 50.8 mm (2 in) of the coolant exhaust system
located just inside the left track under the Main
Disconnect Switch Box.
Press switch (6) down to turn the engine heater ON.
Press the switch again to raise the switch and turn the
engine heater OFF. An internal light in the switch will
illuminate to indicate that the heater is functioning.
After the switch has been turned off, the light will
continue to illuminate until the coolant heater has
completed a three-minute shut-down procedure.
Do not start the engine while the light in the engine
coolant heater switch is on. The engine coolant heater
requires three minutes to purge itself of diesel fumes.
Damage to the engine coolant heater may result if the
engine is started too soon after use.
Do not operate the engine coolant heater if the coolant
Lift switch cover (7) to access the switch.
Start-Aid Switch (8)--Move the switch up and
hold it for three or more seconds, and then
release it. Depending on the temperature of
the intake air and engine coolant, a
amount of ether is injected into the engine air intake
manifold. When the start-aid system is functioning and
the blackout light switch is in STOP LIGHT or
SERVICE DRIVE, the start-aid indicator will turn on.
Use the ether sparingly. Excessive ether can cause
piston and ring damage.
Do not inject ether unless the engine is rotating.
NOTE: The electronic control module (ECM) will allow
the manual injection of ether if the intake air
temperature is below 00C (320F), the engine coolant
temperature is below 400C (1040F), and the engine
speed is below 1000 rpm.
NOTE: The ECM automatically turns on the engine
intake air heater to assist in starting the engine,
depending on the air temperature and the engine
coolant temperature. It is permissible to manually
inject ether using the start-aid switch when the intake
air heater is turned on.