Komatsu PC800-8 Operation & Maintenance Manual page 270

Hydraulic excavator
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MAINTENANCE PROCEDURE
2. Open the engine hood.
3. Set the container to catch the fuel under the filter cartridge
(2).
4. Using a filter wrench, turn transparent cap (3) to the left to
remove it. (This cap is used again.)
5. Using a filter wrench, turn filter cartridge (2) counterclock-
wise to remove it.
6. Remove seal (4) from transparent cap (3), then clean the
cap. If transparent cap (3) is damaged, replace it with a
new part.
7. Coat new seal (4) with clean fuel or oil, then install it to
transparent cap (3).
8. Install transparent cap (3) to new filter cartridge (2).
q Tightening torque for transparent cap: 10.0 N·m (1.0
kgf·m)
9. Check that the drain plug at the bottom of transparent cap
(3) is tightened securely.
Tightening torque: 0.2 - 0.45N·m ( 0.02 -0.046 kgf·m)
10. 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.
NOTICE
q When adding fuel, do not remove cap (B). Always add
fuel from the 8 small holes (A) on the dirty side.
q After adding fuel, remove cap (B) and install the fuel fil-
ter.
q Always fill with clean fuel. Be careful not to let any dirt
or dust get into the fuel. In particular, center portion is
the clean side, so do not remove cap (B) when adding
fuel. Be careful not to let dirt or dust get into center
portion on the clean side.
11. 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.
q When tightening with a filter wrench, be extremely careful not to dent or damage the filter.
4-50
MAINTENANCE

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