Hydraulic operation and maintenance

First, Y1: solenoid valve: control rod.

Y2: solenoid valve: control 80 cartridge valve open.

Y3: solenoid valve: control 50 cartridge valve open.

Y4: solenoid valve: control 80 cartridge valve closed.

Y5: solenoid valve: control rod cavity pressure relief.

Y6: solenoid valve: control rod cavity pressure relief.

Two, (1) fast lift stick: Y1.Y3.Y4.Y6 motor at the same time get electricity, receive the last high limit Y1, Y3, Y4, Y6 motor and power loss.

(2) weight drop stick: Y5.Y6 at the same time get electricity.

(3) Drop Stick: Y4.Y5 motor at the same time, when there is a rod cavity to set the pressure of Y4.Y5 motor at the same time lost power, Y2 power loss after 3 seconds, the side of the normal work.

(4) voltage compensation: motor power, to set the power loss.

(5) decompression: Y6 power, to set the pressure loss.

Three, can not press: 1, the main pressure is greater than the given pressure.

2, Y5 spool is stuck.

3, a rod cavity pressure relief valve is closed.

4, Y6 spool is stuck

Can not lift stick: 1, Y1.Y6 whether the spool is stuck.

2, Y5 valve is stuck.

3, Y4 whether the electricity 3 seconds 80 cartridge valve is stuck. Pilot pressure must be greater than 3MPa to work properly

Pilot pressure does not maintain pressure: check the pilot oil above the check valve is stuck

How to guide the pressure of the press: first, there is the exit of the ball 50 ball valve closed, and then start the motor, pilot pressure can be achieved

Before and after the cavity channeling pressure: check whether the Y3 power loss, 50 plug valve is stuck. You can close the middle of the ball valve, the ball valve for testing

Four, in front of the boot to ensure that the oil pump in front of the main oil circuit. The pilot back to the oil circuit.80 plug valve after the ball valve is open, before the boot

Editor: Qin Jiangtao