Winterfronts - Peterbilt 348 2017 Operator's Manual

OPERATING THE ENGINE
WARNING!
Do not work on or near the fan with
the engine running. Anyone near the
engine fan when it turns on could be
injured. If it is set at MANUAL, the
fan will turn on any time the ignition
key switch is turned to the ON posi-
tion. In AUTO, it could engage sud-
denly without warning. Before turn-
ing on the ignition or switching from
AUTO to MANUAL, be sure no work-
ers are near the fan.
4
CAUTION
The fan or equipment near it could
be damaged if the fan turns on sud-
denly when you do not expect it.
Keep all tools and equipment away
from the fan.
4-12
NOTE
Do not operate the engine fan in
the MANUAL position for extended
periods of time. The fan hub was
designed for intermittent operation.
Sustained operation will shorten the
fan hub's service life as well as re-
duce fuel economy.
Y53-6060-1C1

Winterfronts

A winterfront or other air flow 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 cool-
ing module components. Remove
winterfront as soon as the ambi-
ent 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.
(03/17)