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30 Testing and adjusting
Bleeding air from each part
Air bleeding item
Contents of work
• Replacing hydraulic oil
• Cleaning strainer
• Replacing return filter element
• Replacing and repairing hydraulic
pump
• Removing suction piping
• Replacing and repairing control
valve
• Removing control valve piping
• Replacing and repairing cylinder
• Removing cylinder piping
• Replacing and repairing swing
motor
• Removing swing motor piping
• Replacing and repairing travel
motor
• Removing travel motor piping
• Replacing and repairing swivel joint
• Removing swivel joint piping
Note: Bleed air from the swing motor and travel motor only when the oil in the motor cases is drained.
1.
Bleeding air from hydraulic pump
1)
Loosen air bleeder (1) and check that oil
oozes out through the air bleeder.
2)
After the oil oozes out, tighten air bleeder
(1).
3
Air bleeder:
7.8 – 9.8 Nm {0.8 – 1.0 kgm}
a Do not use an impact wrench to
tighten the air bleeder.
PC210/230-8
PC210, 230, 240-8
1
1
2
Bleeding air
from
Starting
hydraulic
engine
pump
q
q
q
q
q
q
q
q
q
q
PC240-8
1
Air bleeding procedure
3
4
Bleeding air
Bleeding air
from swing
from cylinder
motor
q
q
(See note)
o
o
q
o
q
o
q
o
o
q
o
o
o
o
UEN00228-04
5
6
Checking oil
Bleeding air
level and
from travel
starting
motor
operation
q
q
(See note)
o
q
o
q
o
q
o
q
o
q
q
q
o
q
55
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Troubleshooting
