2.
Turn the cap of oil filler port (F) gradually to release the in-
ternal pressure, and removing the cap.
3.
Remove hydraulic tank cover (1) to take oil drain hose (2)
out from inside.
4.
Remove drain plug (P) to install oil drain hose (2).
5.
Place the container to receive the drained oil.
6.
Loosen drain valve (3) and drain the oil.
7.
After draining the oil, tighten drain valve (3).
8.
Remove oil drain hose (2) and install drain plug (P).
9.
Stow oil drain hose (2) and install hydraulic tank cover (1).
10.
Add the specified amount of oil through oil filler port (F).
11.
After adding oil, check that the hydraulic oil is at the speci-
fied level.
For the method to check the oil level in the hydraulic tank,
see “METHOD FOR CHECKING OIL LEVEL IN HY-
DRAULIC TANK, ADDING OIL (3-154)”.
12.
Bleed air from the hydraulic circuit.
For the air bleeding procedure of hydraulic circuit, see
“METHOD FOR BLEEDING AIR FROM HYDRAULIC CIR-
CUIT (4-30)”.
METHOD FOR CHECKING WATER PUMP
Check around the water pump for water leakage.
If any part is leaking, ask your Komatsu distributor for inspection/repair.
METHOD FOR CHECKING STARTING MOTOR
The brush may be worn and the grease in the bearings may have dried out.
Ask your Komatsu distributor for inspection and repair.
If the engine is started frequently, have this inspection performed every 1000 hours.
MAINTENANCE PROCEDURE MAINTENANCE
4-82
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