operators_manual

2. Slip the belt around the idler pulley
attached to the automatic
tensioner.
3. Release the automatic tensioner.
4. Check the belt alignment on each
pulley. The belt must fall between
the flanges of each pulley.
Engine Fan
General maintenance information and
precautions about the engine fan.
WARNING
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 igni-
tion or switching from AUTO to MAN-
UAL, be sure no workers are near the
fan. Failure to comply may result in
death or personal injury.
Your truck may be equipped with an On/Off
or Viscous Fan Drive. Follow these
guidelines to check your engine fan:
• Check the fan bearings for fan hub
bearing looseness, loss of lubricant
and any abnormal conditions. (For
example, fan belt misaligned or
excessive wear/damage.) Before
starting the engine and with the
engine off, look and feel for
looseness in the fan hub.
• With the engine idling and the hood
open, stand at the front of the
vehicle. Listen for any noises
coming from the fan hub. Bearings
that have lost lubricant, and are
dry, will typically emit a squeal or a
growl when the engine is at
operating temperature and the fan
clutch is engaged. If noise is
detected, have the fan bearings
inspected by an authorized
dealership.
Engine Fan Blade
Verify that there is enough fan blade
clearance with the fan shroud. Around the
fan shroud, the recommended distance is 1
in. (25 mm) from front edge of any fan
blade-to-radiator side member. Minimum
clearance is 3/4 in. (19 mm).
MAINTENANCE - Engine Maintenance
Y53-6047-2HEN (03/18) 241
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