OPERATING THE ENGINE
4
WARNING!
CAUTION
Do not work on or near the fan with the
engine running. Anyone near the en
-
gine fan when it turns on could be in-
jured. If it is set at MANUAL, the fan
will turn on any time the ignition key
switch is turned to the ON position. In
AUTO, it could engage suddenly with
-
out warning. Before turning on the ig-
nition or switching from AUTO to MAN-
UAL, be sure no workers are near the
fan.
The fan or equipment near it could be
damaged if the fan turns on suddenly
when you do not expect it. Keep all
tools and equipment away from the
fan.
NOTE
Do not operate the engine fan in the
MANUAL position for extended peri
-
ods of time. The fan hub was de-
signed for intermittent operation. Sus-
tained operation will shorten the fan
hub's service life as well as reduce fuel
economy.
Winterfronts
A winterfront or other air ow restriction
device may be mounted in front of
the radiator to increase cab heater
temperature in cold climates.
CAUTION
A winterfront should only be used at
temperatures below 40°F (4°C). Use
of a winterfront above 40°F (4°C) can
decrease life of cooling module com
-
ponents. Remove winterfront as soon
as the ambient temp reaches 41°F
(5°C). The use of a winterfront above
40°F (4°C) can result in excessive
engine coolant, oil, and charge air
(intake) temperatures, which can lead
to overheating and possible engine
or coolant module damage and emis
-
sions non-compliance.
4-12 Y53-6047–2C (04/13)
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