2003 Ford F350 Diesel Supplement 2nd Printing - Page 6

2003 Ford F350 Manual

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Diesel information Air filter restriction gauge The restriction gauge, located on the upper housing of the air cleaner assembly, monitors the condition of the air filter element in two ways: First, the colored indictor inside the gauge highlights the percentage that the air filter element is clogged with dust or contaminants. Refer to Engine Compartment in Service Points chapter. Second, the gauge contains an electrical switch which illuminates a warning light on the instrument cluster when the air filter element is 100% clogged. Refer to the Warning lights chapter. Check the air filter restriction gauge whenever the hood is raised to perform general engine maintenance at least every 12,000 km (7,500 miles). If the vehicle is operated in extremely dusty conditions, check the gauge at least every 800 km (500 miles), or two weeks, whichever comes first. The air filter element must be replaced when the colored band on the gauge reaches the CHANGE FILTER mark. Engine performance and fuel economy are adversely affected when the maximum restriction is reached. Blowing-out the air filter element with compressed air is not recommended as the compressed air may damage the filter paper. Note: It is not possible to determine the level of filter clogging by visual appearance alone. A filter which appears to be dirty may actually have several thousand kilometers (miles) of life remaining. 6

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Air filter restriction gauge
The restriction gauge, located on
the upper housing of the air cleaner
assembly, monitors the condition of
the air filter element in two ways:
First, the colored indictor inside the gauge highlights the percentage that
the air filter element is clogged with dust or contaminants. Refer to
Engine Compartment
in
Service Points
chapter.
Second, the gauge contains an electrical switch which illuminates a
warning light on the instrument cluster when the air filter element is
100% clogged. Refer to the
Warning lights
chapter.
Check the air filter restriction gauge whenever the hood is raised to perform
general engine maintenance at least every 12,000 km (7,500 miles). If the
vehicle is operated in extremely dusty conditions, check the gauge at least
every 800 km (500 miles), or two weeks, whichever comes first.
The air filter element must be
replaced when the colored band on
the gauge reaches the CHANGE
FILTER mark. Engine performance
and fuel economy are adversely
affected when the maximum
restriction is reached.
Blowing-out the air filter element with compressed air is not
recommended as the compressed air may damage the filter paper.
Note:
It is not possible to determine the level of filter clogging by visual
appearance alone. A filter which appears to be dirty may actually have
several thousand kilometers (miles) of life remaining.
Diesel information
6