Komatsu H70051 Series Operation & Maintenance Manual page 370

MAINTENANCE PROCEDURE
1.
Open the engine side cover (1) on the right side of the ma-
chine.
2.
Place a container under the filter cartridge to catch the
fuel.
3.
Turn filter cartridge (2) counterclockwise by using the filter
wrench, and remove it.
4.
Clean the filter head.
Replace inner seal (3) with a new one.
5.
Thinly apply oil to the packing surface of the new filter cartridge, then install the filter cartridge to the filter
head.
NOTICE
• Do not fill the new filter cartridge with fuel.
• Remove cap (A) at center and install the filter car-
tridge.
6.
When installing the cartridge, tighten it until the packing
surface contacts the sealing surface of the filter head, then
tighten it 3/4 turn.
REMARK
If the filter cartridge is fastened too much, the packing will
be damaged and this leads to leakage of fuel. If the filter
cartridge is too loose, fuel will also leak from the packing
clearance. Be sure to observe the tightening angle.
When tightening with a filter wrench, be extremely careful
not to dent or damage the filter.
7.
After completing the replacement of filter cartridge (2), bleed air from the circuit.
Bleed the air as follows:
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MAINTENANCE