Komatsu PC500LC-10R Shop Manual page 467

30 TESTING AND ADJUSTING
6.
Remove the cap from the bleeder (3) for arm cylinder and
bucket cylinder.
NOTICE
• Do not stand in front of the bleeder (3) for arm cyl-
inder and bucket cylinder during this work. Oil may
spurt out due to the remaining pressure in the pipe
when loosening the bleeder (3) for arm cylinder
and bucket cylinder.
7.
Install the hose (A) to the bleeder (3) for arm cylinder and
bucket cylinder. Insert the opposite end of the hose A into
the oil container B. The oil is drained from the hose (A) to the oil container.
8.
Gradually loosen the bleeder (3)for arm cylinder and buck-
et cylinder a half turn.
NOTICE
• Do not loosen the bleeder (3) for arm cylinder and
bucket cylinder more than a half turn.
• Bleeders (4) for boom cylinder are at the positions
shown in the figure. Release the remaining pres-
sure from the boom cylinder circuit according to
the procedure described above.
9.
When oil starts to flow out from the hose (A), tighten the
bleeder (3) for arm cylinder and bucket cylinder.
3
Bleeder (3) for arm cylinder and bucket cylinder:
11 to 15 Nm {1.1 to 1.5 kgm}
10. Disconnect the hose (A), and put the cap on the bleeder (3) for arm cylinder and bucket cylinder.
Method for releasing remaining pressure in hydraulic cylinder circuit when con-
necting the pipe
Perform the same work as that of "Method for releasing re-
maining pressure in hydraulic cylinder circuit when disconnect-
ing the pipe" for releasing the remaining pressure.
• However, use the bleeder (5) which is attached to the plug
for releasing the remaining pressure in the arm cylinder
circuit, bucket cylinder circuit, and each cylinder.
PC500LC-10R
RELEASE REMAINING PRESSURE FROM HYDRAULIC SYSTEM
30-61