Komatsu D155A-6 Operation & Maintenance Manual page 302

MAINTENANCE MAINTENANCE
4. Remove seal (4) from transparent cap (3), then clean the cap.
If transparent cap (3) is damaged, replace it with a new part.
5. Coat new seal (4) with clean fuel or oil, then install it to
transparent cap (3).
6. Install transparent cap (3) to new filter cartridge (2).
Tightening torque for transparent cap:
10.0 Nm (1.0 kgm, 7.2 lbft)
7. Check that the drain plug at the bottom of transparent cap (3)
is tightened securely.
Tightening torque: 0.2 - 0.45Nm ( 0.02 -0.046 kgm, 0.1 - 0.3
lbft)
8. 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
When adding fuel, do not remove cap (B). Always add fuel from the 8
small holes (A) on the dirty side.
After adding fuel, remove cap (B) and install the fuel filter.
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.
9. 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.
When tightening with a filter wrench, be extremely careful not to dent or damage the filter.
10. 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 - 5 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 6 - 13 to install
it.
SERVICE PROCEDURE SERVICE PROCEDURE
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