The working conditions of jaw crushers are quite bad, and incorrect operation or errors in operation often cause accidents. Practice has proved that strictly following the operating procedures of the equipment is important for the normal operation of the machine and improving the production capacity of the machine. Jaw crushers of different structures and specifications. The operating procedures will be slightly different, but the basic principles are the same. The following introduces the basic wood operation methods of large and medium-sized jaw crushers.     Before starting the jaw crusher, the following preparations should be made:
   (l) Check carefully whether the main parts of the crusher are intact, whether the fastening bolts and other connecting parts are loose, whether the pulley cover is intact, whether the transmission parts collide or have obstacles, etc.
   (2) Check whether auxiliary equipment such as feeder, belt conveyor, electrical equipment and signal equipment are in good condition.
   (3) Check whether there is any material in the crushing cavity. If there is a large piece of ore or debris in the crushing cavity, it be cleaned and the crusher can be started under no load.
   (4) The starting capacity of some crusher motors is less than that of the crusher, and the flywheel can be rotated through the angle with a crane. Make the connecting rod in a position that is conducive to starting, that is, the eccentricity is on the upper part of the eccentric shaft rotation line.
   (5) For large and medium-sized jaw crushers, check the amount of oil in the lubricating oil tank before starting. Replenish lubricating oil when necessary. Then start the oil pump to supply oil to the lubricating parts of each bearing of the crusher, wait until the oil return pipe has oil return (usually 5-10 min), and the oil pressure gauge pointer is after the normal working pressure value. The crusher can be started in winter. If there is no heating equipment in the workshop, the oil preheater switch should be turned on to preheat the oil to 15～20℃ before starting the oil pump.
   (6) The large type crusher with cooling water device connected to lubrication parts such as eccentric bearing should open the circulating cooling water valve in advance.
   (7) After making the above preparations, send out the signal to drive. Only after obtaining the consent of the next process can drive.