Komatsu Galeo PC800LC-8, Operation & Maintenance Manual

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MAINTENANCE
MAINTENANCE PROCEDURE
4-39
NOTICE
q
If the air is not bled from the swing motor, the motor bearings may be damaged.
q
Use the above procedure also to bleed the air when the swing motor safety valve has been replaced.
5. Bleeding air from attachment (when installed)
If an attachment has been installed, run the engine at low idling and operate the attachment pedal repeatedly
(approx. 10 times) until the air has been bled from the attachment and circuit.
NOTICE
q
If the method of bleeding the air from the attachment itself is specified by the manufacturer, bleed the
air according to the specified procedure.
q
After completing the air bleeding operation, stop the engine, and leave the machine for 5 minutes
before starting operations. This will remove the air bubbles in the oil inside the hydraulic cylinders.
q
Check that there is no leakage of oil and wipe off any oil that has been spilled.
6. Bleeding air from travel motor circuit
If the piping has been removed from the travel motor cir-
cuit, bleed the air after reassembling. To bleed the air, run
the engine at low idling and do as follows.
1) Start the engine and run at low idling.
2) Remove travel motor cover (1), then loosen air bleed plug
(2) one turn.
NOTICE
Do not loosen plug (2) more than one turn.
3) When no more cloudy white oil comes out from air bleed
plug (2), tighten air bleed plug (2).
4) Carry out fine operation of the travel lever and set to FOR-
WARD and REVERSE 4 - 5 times.
5) Install the travel motor cover.
7. Operation
1) After completing the air bleed operation, stop the engine and wait for at least 5 minutes before starting oper-
ations. This will allow the bubbles in the oil inside the tank to escape.
2) Check that there is no leakage of oil, and wipe up any oil that has been spilled.