Replace Fuel Prefilter Cartridge - Komatsu ecot3 GALEO HM300-2 Operation And Maintenance Manual

SERVICE PROCEDURE

REPLACE FUEL PREFILTER CARTRIDGE

After the engine has been operated, all parts are at high temperature, so do not replace the filter immediately. Wait for all parts
to cool down before starting the operation.
High pressure is generated inside the engine fuel piping system when the engine is running.
When replacing the filter, wait for at least 30 seconds after stopping the engine to let the internal pressure go down before
replacing the filter.
Do not bring any fire or flame close.
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.
Container to catch the oil
Prepare a filter wrench
1. Set an oil receiving container under the fuel prefilter cartridge.
2. Turn water separator cup (2) installed to the bottom of filter
cartridge (1) to the left and remove it. (Use this cup again.)
3. Using a filter wrench, turn filter cartridge (1) counterclockwise
to remove it.
4. Install cup (2) removed before to the underside of the new fuel
prefilter cartridge. (At this time, be sure to replace the O-ring
with new one.)
Tightening torque of cup: 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.
8. Remove filter cartridge cap (A) and install to the filter holder.
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WARNING
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