Komatsu PC490-11, Инструкция по установке и эксплуатации

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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 for oil filler (F), and release the internal
pressure.
3.
Loosen the bolts (4 pieces) to remove 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 spring (2), valve (3) and strainer (4), take
out 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 cleaning oil.
7.
Install the new element in the place where old element (5) was installed.
8.
Place strainer (4), valve (3) and spring (2) onto the element.
9.
Set 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 (3-150)”.
11. Start the engine and run it at low idle for 10 minutes to bleed air. For details, see “METHOD FOR START-
ING ENGINE (3-173)”.
12. Stop the engine.
REMARK
Operate the machine after halting for more than 5 minutes. This will remove the air bubbles in the oil inside
the tank.
13. Check that there is no leakage of oil and wipe off any oil that is spilled.
MAINTENANCE MAINTENANCE PROCEDURE
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