Central rotary catch rock machine operating procedures: Rotary bodies universal joint cross ball joints rotation is flexible, pin is broken, with or without loosening. Turbocharger movement is flexible, with the oil control valve and valve action is sensitive, with or without leakage leakage phenomenon. Sheave rotation is flexible central rotary catch rock Factory, sheave shaft liner wear is serious. Central rotary catch rock machine: grab rock machine lifting mechanism is installed, it should first upgrade pneumatic winch placed at the center of the disc rotating crane grab rock machine manufacturer, and replace it on the rack rotation around the center beam rotation grab rock machine , find the right position, tighten the bolts. Grab install grasping rock grab rock machine sales center rotation should be put under the Face grab, but pay attention to the connection plate and cylinder tied to prevent the decentralization process in the rod drop, claw automatically open.