Is there any weakness in the electric hydraulic grab? As an extraction device mainly used to support the crane, the electric hydraulic grab can be divided into two main types, namely, pump controlled and valve controlled. So, are there any weaknesses and defects in these two types of grab?

There are some differences between the two types of grab. First, the pump control grab bucket, its opening and closing is controlled by the hydraulic pump's positive and negative rotation, and the positive and negative rotation is driven by the motor. So, if the equipment is reversed frequently, the motor will be constantly started frequently, when the material is opened, it may be divided several times, and it can easily plug the funnel to a certain extent.

The valve controlled electric hydraulic grab bucket is controlled by the reversing valve in the hydraulic pump station. In operation, motor and hydraulic pump is always rotating in one direction, as long as the start time can be compared across, there is a big advantage.

The pump control grab there are weaknesses: if the motor is started to start with load, because of the large starting current, coupled with frequent starting, easy to burn electrical components, caused by the positioning hole and not with the broken shell cover cast iron motor, resulting in short service life. Pay more attention when using.