METHOD FOR REPLACING FUEL MAIN FILTER CARTRIDGE
WARNING
• Immediately
after the engine is stopped, the parts are still very hot. Do not replace the fuel filter car-
tridge immediately.
Wait for all of parts to cool down before starting the work.
• High pressure is generated inside the engine fuel piping system when the engine is running.
When replacing the fuel filter cartridge, 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.
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 genuine 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 dirt or
dust get in, more than ever before.
If dust sticks to the fuel system, wash it off thoroughly with fuel.
Items to be prepared
• Filter wrench
• Container to catch the fuel
• Cloth
1.
Pull the engine rear cover (1) backward to open it.
Open
the engine rear cover (1) fully and it is secured by
rod (2).
2.
Pull the cooling cover (3) backward to open it.
MAINTENANCE PROCEDURE MAINTENANCE
4-74
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