Komatsu PW98MR-10 Operation & Maintenance Manual page 387

MAINTENANCE
14. Loosen the bolts (4 pieces) and remove cover (7).
At this time, cover (7) may jump out under the force of
spring (8). Remove the bolts while pressing the cover (7)
down a.
15. Hold the top of rod (9), pull it up, and remove spring (8)
and strainer (10).
16. Remove all dirt from strainer (10), then wash it in clean
diesel fuel or flushing oil.
If strainer (10) is damaged, replace it with a new one.
17. Insert strainer (10) and set it in protruding part (11) of the
tank.
18. Install cover (7) with the bolts while pressing it with the
hand.
Check O-ring fitted to cover (7). If it is damaged, replace it
with a new one.
19. Add the refill capacity of oil through oil filler port (F).
20. Check that the oil level is between H and L lines on sight
gauge (G).
For the method of checking the oil level, see "METHOD
FOR CHECKING OIL LEVEL IN HYDRAULIC TANK, ADDING OIL (3-129)".
21. Install the cap of oil filler port (F).
22. Start the engine.
23. Swing the boom to the center and fully extend the boom,
arm, and bucket cylinders as shown in the figure.
24. After removing the oil filler cap, install it to pressurize the
tank.
NOTICE
If the hydraulic tank is not pressurized, air is sucked in
the pump and it affects the components badly.
25. Move plate (4) to the center of the cap and fix it with bolt
(3).
26. Remove cover support lever (2) and fix it to the lever lock
securely.
27. Close dirt cover (1).
28. Bleed air from the hydraulic circuit.
For the air bleeding procedure of hydraulic circuit, see "METHOD FOR BLEEDING AIR FROM HYDRAUL-
IC CIRCUIT (4-31)".
WENAM00061
MAINTENANCE PROCEDURE
4-83