User Manual - Page 383

For F-450 2020.

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Check the air filter restriction gauge
whenever you open the hood to carry out
general engine maintenance or at least
every 7,500 mi (12,000 km). If you operate
your vehicle in extremely dusty conditions,
check the gauge at least every 500 mi
(800 km) or two weeks, whichever occurs
first. Change the air filter element when
the restriction gauge reads near the
change filter line and the gauge is yellow.
Allowing the restriction gauge to reach
maximum affects engine performance and
fuel economy.
Operating your vehicle in heavy snowfall
or extreme rain conditions may allow
excessive amounts of snow or water into
the air intake system. This could restrict air
flow and cause the engine to lose power
or shut down.
After installing a new air filter element, you
must reset the gauge by pressing the reset
button.
After operating your vehicle during heavy
snowfall or extreme rain, do the following:
Snow: At the earliest opportunity, open
the hood and clear any snow and ice
from the air filter housing inlet and
reset the air filter restriction gauge.
Extreme rain: The air filter element
dries out after approximately 1530
minutes of driving at highway speeds.
At the earliest opportunity, open the
hood and reset the air filter restriction
gauge.
Note: Do not remove the foam filter.
CHANGING THE ENGINE AIR
FILTER - 7.3L
WARNING: To reduce the risk of
vehicle damage and personal burn
injuries, do not start your engine with the
air cleaner removed and do not remove
it while the engine is running.
Note: Operating your vehicle in heavy
snowfall or extreme rain conditions may
allow excessive amounts of snow or water
into the air intake system. This could plug
or soak the air filter that could cause the
engine to lose power or shut down.
When replacing the air filter element, use
a Motorcraft® air filter element. See
Motorcraft Parts (page 439).
Note: Failure to use the correct air filter
element may result in severe engine
damage. Resulting component damage
may not be covered by the vehicle Warranty.
Change the air filter element at the correct
interval. See Scheduled Maintenance
(page 558).
E270820
1. Locate the mass air flow sensor
electrical connector on the air outlet
tube. Disconnect the mass air flow
sensor electrical connector.
380
Super Duty (TFE) Canada/United States of America, enUSA, Edition date: 201909, First-Printing
Maintenance
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