Excavator solenoid valve 144-1644 hydraulic pump proportional solenoid valve

   Solenoid valve
 

     Solenoid power, through the (electromagnet) fixed core adsorption movable core left rotation, movable core press the push rod, switch the valve core, the solenoid valve is similar to a switch, can not adjust the size.

    Proportional solenoid valve

      The solenoid proportional valve uses a proportional solenoid to generate an electromagnetic force proportional to the current, through which the movable core is absorbed; When controlling the current of the proportional solenoid, it is necessary to set the output current amplifier in accordance with the command voltage, and the proportional valve can be adjusted.

    Solenoid valve fault alarm troubleshooting method

      When the Kobelco excavator appears D prefix and E prefix alarm code, such as D012, E013, it is a solenoid valve problem; When the alarm code beginning with the letter D is encountered, it is the relevant solenoid valve fault, and later friends can inquire about the fault, according to the specific location of the following instructions to find the relevant parts and solve the fault in time. (Take Kobelco SK-8 series models as an example) Find the location of the solenoid valve and switch with the interchangeable solenoid valve next to it. If the alarm disappears and other alarms are generated, it should be the fault of the solenoid valve.

    In addition to the fault of the solenoid valve itself, there may be a line problem, and there is a adapter between the line and the computer board, which requires service personnel to check the wiring harness.

Excavator proportional solenoid valve how to determine good or bad

1, determine whether the solenoid valve y2 close strictly remove the motor to the solenoid valve y2 two oil pipes, and use two plugs to block the motor end of the two oil ports, and then operate the main hoist, if it works normally, indicating that the fault from the solenoid valve y2 closed loosely; If it is still abnormal, it is necessary to check its parts.

2, determine whether there is a problem with the hydraulic lock first adjust its two lock cores, if it does not work, and then remove the lock for careful inspection, if you can not find the reason, you can use the ready-made lock to do the installation test to find out the cause of the failure. Because the hydraulic lock of the secondary winch is the same as that of the main winch, the lock of the secondary winch can also be borrowed to identify the quality of the main winch lock by replacing it one by one. If both locks are OK, proceed to the next step.