Komatsu PC450-8 Operation & Maintenance Manual page 334

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MAINTENANCE PROCEDURE
2. Open the front engine hood.
3. Set the container to catch the fuel under the filter cartridge
(2).
4. Using a filter wrench, turn filter cartridge (2) counterclock-
wise to remove it.
5. Clean the filter holder, coat the packing surface of the new filter cartridge thinly with oil, then install the filter
cartridge to the filter holder.
NOTICE
q
Do not fill the new filter cartridge with fuel.
q
Remove cap (B) and install the filter cartridge.
6. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then tighten it 3/
4 of a turn.
If the filter cartridge is tightened too far, the packing will be damaged and this will lead to leakage of fuel. If the
filter cartridge is too loose, fuel will also leak from the packing, so always tighten the correct amount.
7. Turn the valve (1) at the bottom of the fuel tank to the
OPEN position (O).
8. After completing the replacement of filter cartridge (2), bleed the air.
Bleed the air as follows:
9. Add fuel to the fuel tank until full (to FULL mark on the fuel gauge).
4-68
MAINTENANCE

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