Komatsu Galeo PC138US-8 Shop Manual page 379

30 Testing and adjusting
3) While running the engine at high idle, per-
form step 2).
4) While running the engine at low idle, move
the piston rod to the stroke end and
relieve the oil.
5) Bleed air from the arm cylinder and bucket
cylinder according to steps 2) – 4).
4. Bleeding air from swing motor
1) Turn the swing lock switch "ON" and run
the engine at low idle for 5 minutes.
a Bleed air from the swing motor by
applying the S-port pressure.
2) Remove the swing motor top cover, dis-
connect hose (1) from the swing motor,
and block the hose with a plug.
a Use the following plug to block the
hose.
07379-70628 (Plug #06)
3) Run the engine at low idle and check that
oil flows out of elbow (2).
a If no oil flows out of the elbow, per-
form step 1) again.
4) Connect hose (1) under its normal condi-
tion.
5. Bleeding air from travel motor
1) Remove the travel motor cover and dis-
connect motor drain hose (2).
2) Run the engine at low idle and check that
oil flows out of nipple (3).
PC138US, USLC-8
6. Checking oil level and starting work
1) Run the engine, retract the arm cylinder
and bucket cylinder to the stroke ends,
lower the work equipment to the ground,
and stop the engine.
2) Check the oil level by sight gauge (3) on
the rear side of the hydraulic tank.
a If the oil level is below line L, it is
insufficient. Add oil.
a The oil level changes according to the
oil temperature. Add oil when the oil
level is out of the following standard
ranges.
When oil temperature is 10 – 30°C:
q
When oil temperature is 50 – 80°C:
q
SEN02458-01
Between line H and line L
Near line H
51