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How to Replace
the Fuel Filters
How to Replace the
Fuel Filters - Ops - DD5
Notice: If you have just changed
the engine oil and filter, you MUST start the engine and confirm
proper oil pressure before changing the fuel filters. If no oil pressure
is shown after approximately 10 seconds, stop the engine and determine
the cause. Running the engine with no oil pressure could result in
engine damage. Start the engine with the accelerator pedal in the
idle position. Monitor the oil pressure gauge or indicator lamp. Keep
the engine running at idling speed until the oil pressure reading
is 345 kPa (50 psi) or more.
Notice: Fuel filter elements will turn black
over time.
This is normal for DD5/DD8 only. Do not replace filters solely because
of this condition. Replace filters between normal service intervals
only if required by troubleshooting.
Note: If you
are replacing all fuel filters, it is not necessary to run the engine
and test for leaks after installing each individual fuel filter. However,
if repairing a leak at one filter, complete that repair and test the
system for leaks after priming the fuel system.
Filters are an integral part of the fuel system. Proper filter selection
and maintenance are important to satisfactory engine operation and
service life. Filters should be used to maintain a clean system, not
to clean up a contaminated system. The scheduled maintenance intervals
for the appropriate duty cycles are listed in this manual.
Warning: PERSONAL INJURY
To prevent the escape of high pressure fuel
that can penetrate skin, ensure the engine has been shut down for
a minimum of 10 minutes before servicing any component within the
high pressure circuit. Residual high fuel pressure may be present
within the circuit.
Notice: At cold temperatures
(-40° C or -40° F), DO NOT remove the filter elements from the caps
unless the intent is to replace the filter elements. Repeated removals
at cold temperatures may break the filter element tabs.