Komatsu PC300LC-8 Operation & Maintenance Manual page 330

MAINTENANCE MAINTENANCE
NOTICE
Do not fill the new filter cartridge with fuel.
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).
10. Insert the key in the starting switch and turn the key to the ON
position (B).
The electric priming pump is actuated.
11. Hold the key at the ON position (B) for 30 seconds, then return
it to OFF position (A) and wait for 10 seconds.
12. Repeat Steps 10 and 11 four times.
13. After replacing the filter cartridge, start the engine and run it at low idling for 10 minutes.
Check for leakage of oil from the filter seal surface. If any oil is leaking, check the tightening of the filter cartridge.
If there is still oil leakage, repeat Steps 1 - 4 to remove the filter cartridge, and if any damage or embedded
foreign material in the packing surface is found, replace it with a new cartridge and repeat Steps 5 - 13 to install
it.
MAINTENANCE PROCEDURE MAINTENANCE PROCEDURE
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