Central rotary catch rock machine rules: Action. Grab rock machine into the well shaft and press provisions of the relevant regulations. Grab rock machine daily maintenance: class conduct a detailed examination of the mechanical center of rotation Inner grab rock machine, identify problems in time. Once for each class oiling oiling. Before the class, Shandong center rotary catch rock machine, once again operating. Central rotary catch rock machine: rock grab Grab installation, should grab onto at the center of rotation Face Shaanxi grab rock machine, but pay attention to the connection plate and the center of rotation of the cylinder tied grasp rock machine, to prevent the decentralization process rod drop, claw automatically open. Grasping rock machine support systems and fixed installation, it should first put under the support system on the lower plate. Mounted fixed and the ring rail grab rock machine is basically the same.