Troubleshooting
Troubleshooting 6-
6
Hydraulic Pump
Trouble Cause Measures
Unsmooth oil supply Low hydraulic oil l evel Refill oil
Under pressure Oil leakage from hydraulic pump Replace pump
Air trapped in pump Refill oil or inspect oil hose
Low pressure in main overflow
valve
Adjust pressure
Abnormal sound from hydraulic
pump
Air trapped in system due to
vacuum caused by low oil level
Addoilandtightennozzle
Vacuum due to high viscosity of
oil
Replace oil
Faulty linkage between pump and
engine
Adjust linkage
Air trapped in hydraulic oil Discharge
Oil leakage from pump Bad sealing ring for hydraulic
pump
Replace the sealing ring
Rotating System
Trouble Cause Measures
Underpowered rotation Low performance of hydraulic
motor
Replace hydraulic motor
Resistance in turntable support Apply grease or replace turntable
support
Low performan ce of blade Low pressure in blade Adjust pressure
Foreign matter in b lade valve or
overflow outlet
Clean the valve
Bad braking for turntable Low pressure in overflow outlet
or blade valve
Adjust pressure
Foreign matter enters sh o veling
valve or overflow port
Clean the valve
Abnormal sound Air trapped in system Refill oil
Insufficient lubrication on
turntable support
Apply grease
Themachinedoesnotmoveeven
when it is rotated
Locked by ro tary locking pin
Liftthehandlethatrotatesthelock
pin to release the lock
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