SDLG LG6210E, Maintenance Manual

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Maintenance Manual
──LG6210E
Hydraulic Excavator
467
Lubrication and draining the air
Table25.Notice about lubrication and draining the air
Item Notes
Lubrication Fill the pump with special hydraulic oil through throttle P1, P2.
• When continuing to repair or replace the pump, it is necessary
to lubricate internal parts, bearings and sliding parts to prevent
scratches, wear, stuck, etc.
Draining
the air
• Continue to repair the hydraulic system, drain the air from the
pump circuit, the method is to release the plug on the pump.
Start
• Before connecting to the pump, check and whether there
are impurities in the pipeline and throttle.
• Check direction of rotation, as well as direction of
pumping oil / draining oil.
• Check the liquid level of hydraulic oil tank.
• When starting, let the engine idle to drain the air in the
circuit.
• Check the hydraulic oil leakage of pump assembly.
• Check whether there is abnormal sound or vibration.
• After operation for some time, check for abnormal
increase of temperature.
General Considerations
• Before removing, determine the nature of the normal
phenomenon. What is important to check whether the
problem is within the circuit, or caused by the regulator,
auxiliary valve, pump or motor.
• Read the maintenance manual before removing, operate
carefully according to prescribed procedures.
•When removing any part, be careful not to let impurities
enter the oil pump.
• Because the parts are through precision machining, be