Komatsu HB365LC-3 Operation & Maintenance Manual page 413

MAINTENANCE
NOTICE
If the machine is equipped with a hydraulic breaker, the hydraulic oil deteriorates faster than in the nor-
mal bucket digging operation. Accordingly, perform the maintenance by referring to "MAINTENANCE IN-
TERVAL FOR HYDRAULIC BREAKER (4-14)".
Items to be prepared
Container to catch the drained oil
1.
Park the machine on a level and firm ground, lower the
work equipment to the ground in the posture shown in the
figure, and stop the engine.
2.
Remove the cap of hydraulic tank oil filler port (F), and re-
lease the internal pressure.
3.
Loosen the bolts (6 pieces) and remove the cover (1).
The cover may be jumped out by spring (2). While pressing down the cover, remove the bolts.
REMARK
If cover (1) is left approximately 5 minutes with the mount-
ing bolts loosened, the internal pressure of the case is re-
leased and the oil in the element is drained, and accord-
ingly less oil drips when the element is removed.
4.
After removing the spring (2), valve (3) and strainer (4),
take out the element (5).
5.
Check the bottom of the filter case for dirt or other materi-
al, and remove any if found.
Take extreme care that the dirt does not fall into the hy-
draulic tank.
6.
Clean the removed parts by using flushing oil.
7.
Install the new element in the place where old element (5) was installed.
8.
Place the strainer (4), valve (3) and spring (2) onto the element.
9.
Set the cover (1) in position, press it down by hand, and install the cover with the mounting bolts.
10. Install the oil filler cap.
For details, see "METHOD FOR INSTALLING HYDRAULIC TANK OIL FILLER CAP (3-153)".
11. Start the engine and run it at low idle for 10 minutes to bleed air by referring to "METHOD FOR STARTING
ENGINE (3-177)".
12. Stop the engine.
MAINTENANCE PROCEDURE
4-65