Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
6-4
Changing Fuel Filters (Cartridge Type)
When handling fuel, make sure there are no flames or heat source in the area.
Wipe any spilled fuel completely. Spilled fuel can ignite and cause fire.
This fuel filter (cartridge type) uses a paper element. It cannot be cleaned for reuse.
The fuel filter cartridges must be installed by hand, and caution should be exercised to prevent denting or
scratching the cartridge surfaces. Do not use a filter wrench for installation.
Check the threaded sections of the air vent plugs, bracket and sealing washers. If the threads are damaged,
replace the damaged part.
Changing Fuel Filters with Engine Stop
1 Close the fuel supply valve to the engine.
2 Clean the area around the fuel filters.
3 Place a fuel receiving tray under the fuel filters.
4 Set the filter handle to the “Left-Close, Right-
Open”.
5 Using the filter wrench, remove 2 fuel filters from
left side.
6 Apply clean fuel to the gasket on the new fuel fil-
ters.
7 Install the fuel filters. When the gasket contacts
the mounting surface on filter bracket, further
rotate 3/4 to a full turn.
8 Set the fuel filter handle to the “Left-Close,
Right-Open”, then take same measures stated in
5 to 7 and replace 2 fuel filters from right side.
9 After replacing the filters, open the fuel feed
valve to the engine, then bleed air from the fuel
system.
Note: Regarding bleeding of the fuel system, refer
to "Bleeding Fuel System" (3-2).
10 Start the engine and let it idle for several min-
utes.
11 Check each fuel filter for fuel leaks. If fuel leaks
from a filter, remove the filter and check the gas-
ket for scratches or other abnormalities, then
reinstall the filter.
fig.6-6 Fuel filter switchover handle
fig.6-7 Changing fuel filters (cartridge type)
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