Excavators and cranes work differently.

The working principle of the excavator is to use the hydraulic principle to transfer the power of the engine to the hydraulic motor, hydraulic cylinder and other executive components through the hydraulic pump, so as to promote the working device to complete various operations.

The working principle of the crane is to use the pulley block and the hoist to lift and move the heavy object, and to achieve the lifting and moving of the heavy object through the rope and the hook and other spreaders.