Komatsu PC450-8, Operation & Maintenance Manual

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MAINTENANCE PROCEDURE
MAINTENANCE
4-56
1. Turn the valve (1) at the bottom of the fuel tank to the
CLOSE position (S).
2. Open the front engine hood.
3. Set the container to catch the fuel under the filter cartridge
(2).
4. Loosen drain valve (3), then drain all the water and sedi-
ment in the transparent cap (4) and also the fuel accumu-
lated in filter cartridge (2).
5. Using a filter wrench, turn transparent cap (4) to the left to
remove it. (This cap is used again.)
6. Using a filter wrench, turn filter cartridge (2) counterclock-
wise to remove it.
7. Remove seal (5) from transparent cap (4), then clean the
cap. If transparent cap (4) is damaged, replace it with a
new part.
8. Coat new seal (5) with clean fuel or oil, then install it to
transparent cap (4).
9. Install transparent cap (3) to new filter cartridge (2).
q
Tightening torque for transparent cap:
10.0 Nm)
10. Check that the drain valve (3) at the bottom of transparent
cap (4) is tightened securely.
Tightening torque: 0.2 - 0.45 Nm ( 0.02 -0.046 kgm)
11. Clean the filter holder, fill the new filter cartridge with clean fuel, coat the packing surface thinly with oil, then
install to the filter holder.