1.
Open the engine
side cover on the right side of the ma-
chine.
2.
Open engine oil filler (F).
3.
Place an oil container right under drain plug (P) to catch
the drained oil.
4.
Remove drain plug (P) and drain the oil.
Check the drained oil. If it contains much metallic powder
or foreign material, contact your Komatsu distributor.
5.
Tighten drain plug (P).
6.
Open the engine side cover on the left side of the ma-
chine.
7.
Turn filter cartridge (1) counterclockwise by using the filter
wrench, and remove it.
If this operation
is performed immediately after stopping
the engine, a large amount of oil will come out, so wait for
10 minutes before starting the work.
8.
Clean filter holder (2), fill the new filter cartridge with clean
engine oil, coat the seal and thread of the new filter car-
tridge with engine oil (or apply thin film of grease), then in-
stall it.
REMARK
Check that there is no old packing stuck to filter head (2). If there is any old packing stuck to the holder, it
will cause leakage of oil.
9.
When installing the cartridge, tighten it until the sealing surface contacts filter head (2), then tighten it 3/4
turn.
10.
After replacing the filter cartridge, refill with engine oil
through oil filler
port (F) until the oil level is between H and
L marks on dipstick (G).
11.
Run the engine at low idle for a time, then stop the engine
and check that the oil level is between H and L marks on
the dipstick. For details, see “METHOD FOR CHECKING
OIL LEVEL IN ENGINE OIL PAN, ADDING OIL (3-164)”.
REMARK
When the ambient temperature is low, water or emulsified matter may stick to the dipstick, oil filler cap, etc. or
the drained oil may be milky white because of water vapor in the blowby gas. However, if the coolant level is
normal, it is not a problem.
There is no problem even if the emulsified matter cannot be removed completely after changing oil.
MAINTENANCE MAINTENANCE PROCEDURE
4-49
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