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MAINTENANCE
SERVICE PROCEDURE
EVERY 500 HOURS SERVICE
Maintenance for every 50, 100 and 250 hours service should be carried out at the same time.
REPLACE ADDITIONAL FUEL FILTER CARTRIDGE
WARNING
Immediately after the engine is stopped, all parts are at high temperature, so do not replace the filter immediately.
Wait for the engine to cool down before starting the operation.
The inside of fuel piping system of the engine is under high-pressure when the engine is running. When replacing the filter,
wait for at least 30 seconds after the engine stops to let the internal pressure go down before replacing the filter.
Do not bring any fire or spark close.
Be careful when opening the air bleed plug at the fuel filter head and the air bleeder of the supply pump. The system is still
under pressure and fuel may spurt out.
NOTICE
Genuine Komatsu fuel filter cartridges use a special filter that has highly efficient filtering ability. When replacing the filter
cartridge, always use a genuine Komatsu part.
The common rail fuel injection system used on this machine consists of more precise parts than the conventional injection
pump and nozzle.
If any part other than a genuine Komatsu filter cartridge is used, dust or dirt may get in and cause problems with the injection
system. Always avoid using substitute parts.
When carrying out inspection or maintenance of the fuel system, pay more attention than normal to the entry of dirt. If dirt is
stuck to any part, use fuel to wash it off completely.
Prepare a filter wrench
1. Set the container to catch the fuel under the additional fuel filter
cartridge.
2.
Using a filter wrench, turn filter cartridge (1) counterclockwise
to remove it.
3.
After removing the cartridge, turn cup (2) of the water separator
installed to the bottom of the cartridge counterclockwise. (This
cup is used again.)
4.
Install cup (2) to the bottom of the new additional fuel filter
cartridge. (When doing this, always replace the O-ring with a
new part.)
Cup tightening torque: 10 Nm (1.0 kgm , 7.2 lbft)
5.
Clean the filter holder.
NOTICE
When filling the filter cartridge with fuel, carry out the filling operation with
cap (A) fitted.
Cap (A) acts to prevent the entry of dirt or dust into the filter cartridge.
6. Fill the filter cartridge with clean fuel through the 8 small holes
(B) in the new filter cartridge.
7.
Coat the packing surface of the filter cartridge with oil.
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