Komatsu PC138US-11 Operation & Maintenance Manual page 425

ATTACHMENTS AND OPTIONS
9.
Remove the bolts (1) (4 pieces), and open the hydraulic
tank top cover (2).
10. Remove the cap of oil filler port (F) gradually to release the
internal pressure.
11. Remove the cap of oil filler port (F).
12. Check that the hydraulic oil temperature is low.
13. Remove the plugs (2 places) at the outlet and inlet.
Be careful not to get any dirt or mud on the hose fitting.
If O-ring is damaged, replace it with a new one.
14. Connect the hose on the attachment side.
Check the direction of flow of the oil and be careful not to
make any mistake.
15. Set the rotor of the stop valve installed to the piping for the
inlet port and the outlet port on the side face of the arm to
FREE position (a).
(a) FREE: Hydraulic oil flows (direction of arrow is parallel
to longitudinal direction of arm)
(b) LOCK: Hydraulic oil does not flow (direction of arrow is
at right angle to longitudinal direction of arm)
Perform FREE or LOCK setting of the stop valve rotor ac-
cording to the following procedure.
1)
Remove bolt (3).
2)
Invert the plate (4), turn the rotor, and set it to FREE
or LOCK position.
3)
Install the plate (4) with bolt (3).
After installing the attachment, check the oil level in the hydraulic tank.
HANDLE MACHINE READY FOR INSTALLATION OF ATTACHMENT
WENAM00111
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