9.
After replacing the filter cartridge, refill with engine oil
through oil filler port (F) until the oil level is between the H
and L marks on dipstick (G).
10.
Run the engine at low idle for a while and then stop it.
11.
Check the oil level in the engine oil pan.
Check that the oil level is between H and L marks on the
dipstick.
For the oil level check procedure, see “METHOD FOR
CHECKING OIL LEVEL IN ENGINE OIL PAN, ADDING
OIL (3-134)”.
12.
Install undercover (1).
METHOD FOR REPLACING FUEL PREFILTER CARTRIDGE
• Immediately after the engine stops, all parts are still very hot, so do not replace the filter immediate-
ly. 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 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.
NOTICE
• Komatsu genuine fuel filter cartridges use a special filter that has highly efficient filtering ability.
When replacing 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 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 receive the oil
1.
Open the fuel inspection cover on the right side of the machine.
2.
Turn the valve (1) to CLOSE position (S).
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