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MAINTENANCE
SERVICE PROCEDURE
REPLACE EXTRA FUEL FILTER CARTRIDGE (WHEN EQUIPPED)
WARNING
After the engine has been operated, all parts are at high temperature, so do not replace the filter immediately. Wait for all parts
to cool down before starting the operation.
High pressure is generated inside the engine fuel piping system when the engine is running.
When replacing the filter, wait for at least 30 seconds after stopping the engine to let the internal pressure go down before
replacing the filter.
Do not bring any fire or flame close.
NOTICE
Genuine Komatsu fuel filter cartridges use a special filter that has highly efficient filtering ability. When replacing the filter
cartridge, always use a genuine Komatsu part.
The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection
pump and nozzle.
If any part other than a genuine Komatsu filter cartridge is used, dust or dirt may get in and cause problems with the injection
system. Always avoid using substitute parts.
When carrying out inspection or maintenance of the fuel system, pay more attention than normal to the entry of dirt. If dirt is
stuck to any part, use fuel to wash it off completely.
Container to catch the oil
Filter wrench
1.
Set the container to catch the fuel under the additional fuel filter
cartridge.
2.
Using a filter wrench, turn filter cartridge (1) counterclockwise
to remove it.
3. After removing the cartridge, turn cup (2) of the water separator
installed to the bottom of the cartridge counterclockwise. (This
cup is used again.)
4. Install cup (2) to the bottom of the new additional fuel filter
cartridge. (When doing this, always replace the O-ring with a
new part.)
Cup tightening torque: 10 N·m (1.0 kgf·m, 7.2 lbft)
5.
Clean the filter holder, fill the new filter cartridge with clean fuel,
coat the packing surface thinly with engine oil, then install to
the filter holder.
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