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Operating procedures for jaw crushers: 1. Comply with the general operating procedures for casting equipment. 2. Check the tightness and wear condition of the V-belt (or flat belt); if it is too tight or too loose, or if it is severely worn, the belt should be adjusted or replaced promptly. 3. Check the wear condition of the protective plates on both sides; if they are severely worn, they should be replaced. 4. Adjust the opening size of the palate plate according to the required particle size per the process specifications. 5. Do not drive if there is no protective cover, or if the protective cover is damaged, to avoid personal injuries. 6. Rotate the flywheel by hand or pull the belt to ensure the equipment moves smoothly before attempting a no-load test run. 7. Feeding and crushing are allowed only after the equipment is running properly under no-load conditions. The material should be added evenly; no other lumps are allowed. 8. Pay regular attention to the discharge situation; if there is a blockage, clear it promptly. 9. Before stopping the machine, all the material blocks between the palate plates must be crushed before it can be stopped. Fault diagnosis and troubleshooting methods for impact crushers: Troubleshooting methods: 1) Check whether the amount of grease is appropriate; the grease should fill 50% of the bearing housing volume ； 2) Clean the bearings and replace the lubricant ； 3) Replace the bearings. Fault symptom: There is a knocking sound inside the machine. Reason: 1) Materials that cannot be crushed enter the machine ； 2) The gasket fasteners are loose, and the hammer hits the gasket ； 3) Breakage of the hammer or other components. Troubleshooting method: 1) Stop the machine and clean the crushing chamber. 2) Check the tightening of the liner plate and the gap between the hammer and the liner plate ； 3) Replace the broken parts. Fault symptom: Excessive discharge. Reason: 1) Excessive wear of the liner and ram has led to an excessive gap ； 2) The sides of the counterattack frame are stuck by stones, preventing it from lowering. Exclusion methods: 1) By adjusting the gap between the front and rear counterattack frames or replacing the liner and ram ； 2) Adjust the position of the counterattack frame so that the gaps between its sides and the frame gaskets are even; replace the gaskets on the frame if they are worn out. Fault symptom: Sudden increase in vibration level. Reason: 1) Unbalanced rotor ； 2) The foundation bolts or bearing seat bolts are loose ； Exclusion method: 1) Reinstall the sledgehammer and perform balance correction on the rotor ； 2) Tighten the foot bolts and bearing block bolts.