Excavator solenoid valve 25-105200 hydraulic pump proportional solenoid valve

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.

3, check the brake signal oil feed, break speed of r-622 and r-825 drilling RIGS produced by the Geotechnical company, the flow of signal oil is adjustable, that is, the time of the main winding to release the brake can be adjusted. Therefore, for both types of drilling RIGS, the flow of signal oil can be adjusted through its regulating valve, and if the working condition of the machine is still not normal, it is necessary to check whether the oil pipe of the brake signal oil is blocked.

4. If these inspection parts are normal, you can only continue to check the brake to see if the brake piston moves smoothly within the working stroke, and repair or replace the cause of the failure