Komatsu PC45MR-30403, Operation And Maintenance Manual, Page: 384 / 475

3.
Turn the rod (4) to LOCK position (L), and fix the cooling
cover (3) with the rod.
4.
Turn the handle (6) of fuel prefilter (5) to CLOSE position
(S).
5.
Place a container under the fuel filter to catch the fuel.
6.
Turn the fuel filter cartridge (7) counterclockwise by using
the filter wrench, and remove it.
After removing the fuel filter cartridge (7), fuel drips down
from the fuel filter head.
In order to prevent flowing out of the fuel, be sure not to
leave the machine with the fuel filter cartridge (7) removed.
7.
Clean the mounting face of the fuel filter cartridge.
8.
Apply thin film of fuel to the packing face.
Do not fill the new fuel filter cartridge with fuel.
9.
Remove the cap (B) at center, and install the fuel filter car-
tridge to the mounting face of fuel filter cartridge.
When installing the fuel filter cartridge, turn it clockwise to
bring the packing surface into contact with the seal surface
of fuel filter cartridge, and then tighten it approximately 1
turn by using filter wrench.
Tightening torque:
19.6 to 23.5 Nm {2.0 to 2.4 kgm, 14.5 to 17.4 lbft}
If the fuel filter cartridge is tightened too far, the packing
will be damaged and this will lead to leakage of fuel. If it is
tightened too loose, fuel will also leak from the packing, so
always tighten to the specified angle.
MAINTENANCE MAINTENANCE PROCEDURE
4-75