IT IS NOT POSSIBLE TO REDUCE THE MOTOR SMOOTHLY IT IS NOT POSSIBLE TO REDUCE THE MOTOR SMOOTHLY 5) 5) EXTRAORDINARY NOISE IS HEARD WHEN SUDDENLY REDUCING THE SPEED FROM EXTRAORDINARY NOISE IS HEARD WHEN SUDDENLY REDUCING THE SPEED FROM THE HIGH-SPEED MODE THE HIGH-SPEED MODE 6) 6) 5-16 It is not possible to reduce the motor smoothly Cause Remedy The orifice for closing the counterbalance is clogged. The opening of the neutral position of the spool is clogged. Wrong setting of pressure of the relief valve. Remove the foreign matter by disassembling and cleaning. Adjust at the correct value. If the relief valve turns out to be out of order, the new one should be used.
It takes time to accelerate the motor Cause Remedy The anti-cavitation valve does not not work properly. Screw the fitting bolts one more time with correct tightening torque. If the valve turns out to be damaged, is should be repaired.