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MAINTENANCE
1.
Stop the machine so that drain plug (H) is directly at the
bottom.
2.
Place the oil containers to catch oil under drain plugs (H)
and (1).
3.
Remove an oil level plug and oil filler plug (G).
4.
Remove drain plugs (H) and (1) and drain the oil.
5.
After draining the oil, install drain plugs (H) and (1).
6.
Add the refill capacity of oil through the hole of oil filler plug
(G).
7.
After adding the oil, check that the oil level is proper.
For the check of oil level, see "METHOD FOR CHECKING
OIL LEVEL IN FINAL DRIVE CASE, ADDING OIL (4-43)".
8.
Install an oil level plug and oil filler plug (G).
METHOD FOR REPLACING FUEL MAIN FILTER CARTRIDGE
Prior to this, perform "METHOD FOR REPLACING FUEL PREFILTER CARTRIDGE (4-49)" of EVERY 500
HOURS MAINTENANCE.
•
Just after the engine stops, all parts are still very hot, so do not replace the filter 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 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 the inspection or maintenance of the fuel system, pay more attention than normal
to the entry of dirt. If dirt sticks to any part, use fuel to wash it off completely.
•
After removing the fuel filter cartridge, fuel drops fall down from the filter head. In order to prevent
dropping of the fuel, be sure not to leave the machine the fuel filter cartridge removed.
Prepare a filter wrench and a container to catch the fuel.
1.
Open the inspection cover at the bottom of the fuel tank.
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WARNING
MAINTENANCE PROCEDURE
4-55
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