Komatsu Galeo HD405-7R, Operation & Maintenance Manual

Page: 258 / 361

.
MAINTENANCE
SERVICE PROCEDURE
EVERY 1000 HOURS SERVICE
Carry out maintenance for EVERY 250 HOURS and EVERY 500 HOURS SERVICE at the same time.
REPLACE FUEL MAIN FILTER CARTRIDGE
WARNING
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.
Prepare a filter wrench
After replacing the fuel pre-filter cartridge, replace the fuel main filter cartridge.
1. Close supply valve (1) of the fuel tank.
2. Set the container to catch the fuel under the filter cartridge.
3. Using a filter wrench, turn filter cartridge (2) counterclockwise
to remove it.
4. Clean the filter holder, coat the packing surface of the new filter
cartridge thinly with oil, then install the filter cartridge to the filter
holder.
NOTICE
Do not add fuel to fuel main filter cartridge (2).
4 - 67