METHOD FOR REPLACING FUEL MAIN FILTER CARTRIDGE
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WARNING
• After the engine stops, all parts are still very hot, so do not replace the filter immediately. Wait for all
parts to cool down before starting the work.
• While the engine is running, high-pressure is generated in the engine fuel piping.
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 open flame close.
• When using the fuel feed pump, do not loosen the air bleeding plug of the fuel circuit.
The fuel circuit is pressurized while the fuel feed pump is operated. If the air bleeding plug is loos-
ened at this time, fuel may spurt out and it is dangerous.
NOTICE
• Komatsu genuine fuel filter cartridges use a special filter that has highly efficient filtering ability.
When replacing the parts, Komatsu recommends using Komatsu genuine parts.
• The common rail fuel injection system used on this machine consists of more precise parts than
those in the conventional injection pump and nozzles. If any cartridge other than a Komatsu genu-
ine filter cartridge is used, dust or dirt may get in and cause problems with the injection system.
Never use a substitute.
• When performing inspection and maintenance of the fuel system, be careful not to let any foreign
material get in, more than ever before. If dust sticks to the fuel system, wash it off thoroughly with
fuel.
• After removing the filter cartridge, fuel drops from the filter head.
In order to prevent the fuel from flowing out, be sure not to leave the machine without the filter car-
tridge.
Items to be prepared
• Container to catch the fuel
• Filter wrench
1.
Close the fuel supply valve (1) of the fuel tank.
2.
Place a container under the filter cartridge (2) to catch the
fuel.
3.
Turn the filter cartridge (2) counterclockwise by using the
filter wrench, and remove it.
4.
Clean the filter head.
5.
Coat the packing surface of the new filter cartridge with oil.
6.
Install the new filter cartridge to the filter head.
MAINTENANCE PROCEDURE
MAINTENANCE
4-56
Summary of Contents for HD465-8
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Page 19: ...LOCATION OF SAFETY LABELS SAFETY SAFETY LABELS 2 3 ...
Page 20: ...SAFETY LABELS SAFETY 2 4 ...
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Page 393: ...SPECIFICATIONS 5 1 ...
Page 397: ...ATTACHMENTS AND OP TIONS Before reading this chapter read and understand the SAFETY 6 1 ...
Page 403: ...REPLACEMENT PARTS 7 1 ...
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