Bleeding Air From Each Part - Komatsu Galeo PC800-8 Shop Manual

SEN00912-02

Bleeding air from each part

Air bleeding item
Contents of work
• Replacement of hydraulic oil
• Cleaning of strainer
• Replacement of return filter ele-
ment
• Replacement or repair of
hydraulic pump
• Removal of suction piping
• Replacement or repair of control
valve
• Removal of control valve piping
• Replacement or repair of cylin-
der
• Removal of cylinder piping
• Replacement or repair of swing
motor
• Removal of swing motor piping
• Replacement or repair of travel
motor
• Removal of travel motor piping
• Replacement or repair of swivel
joint
• Removal of swivel joint piping
Note: Bleed air from the swing motor and travel motor only when the oil was drained from the motor cases.
1. Bleeding air from work equipment pump and
fan pump
1) Loosen work equipment pump bleeder (1)
and fan pump bleeder (2) by 4 turns and
remove the oil filler cap of the hydraulic
tank.
a Leave the machine under the above
condition for 10 minutes or more.
2) After oil flows out of bleeders (1) and (2),
run the engine at low idle.
a If the engine coolant temperature is low
and the automatic warm-up operation is
started, stop the engine temporarily and
reset the automatic warm-up operation
with the fuel control dial (Set the starting
switch in the ON position and hold the
fuel control dial in the MAX position for 3
seconds, and the automatic warm-up
operation is reset).
a Set the lock lever in the LOCK position
so that you will not operate a lever by
mistake.
22
1 2
Bleeding
air from Starting
hydraulic engine
pump
q q
q
q q
q
q
q
q
q
3) After clear oil flows out of bleeders (1) and
Air bleeding procedure
3 4
Bleeding
Bleeding
air from
air from
swing
cylinder
motor
q
q
(See note)
q
q
q
q
3 Bleeder:
(2), tighten the bleeders.
7.8 – 9.8 Nm {0.8 – 1.0 kgm}
30 Testing and adjusting
5 6
Bleeding Checking
air from oil level
travel and start-
motor ing work
q
q
(See note)
q
q
q
q
q
q q
q
PC800, 850-8