Mechanical braking is to press the brake plunger by a number of springs in a circle, so that the friction sheet connected with the motor cylinder through the spline and the metal plate connected with the motor shell through the spline are pressed together to produce friction force. Block motor cylinder block and motor shell relative motion, achieve braking. The release of rotary motor brake depends on hydraulic working oil to push the brake plunger upward to compress the spring, so that the friction plate and metal plate are no longer close, the friction force is eliminated, and the brake is lifted.
The delay valve plunger moves back and forth frequently. Because of the fine cooperation between the plunger and the shell, the small metal chip can make the plunger jam. When the plunger is stuck, the brake can not be lifted or brake smoothly, and the failure of turning or braking is not working, abnormal noise and so on. We can remove the delay valve and clean the gasoline and hydraulic oil one by one. We must keep the plunger running flexibly.
Good hydraulic working oil is the basic condition to ensure the normal operation of high precision parts. Users are required to pay attention to the daily maintenance and timely maintenance of excavators, using qualified and high-quality hydraulic oil return filter and pilot oil filter.