Jaw crushers are essential primary crushing machines in mining, quarrying, and construction industries. Their reliability directly affects plant productivity and operating costs. However, continuous exposure to abrasive materials and heavy loads inevitably leads to component wear and mechanical failures.
This guide provides a structured approach to diagnosing and resolving common jaw crusher problems while establishing effective preventive maintenance practices.
Common Failures of Core Wear Parts
Jaw plates, toggle plates, eccentric shafts, and bearings experience the highest stress during operation.
Jaw Plate Wear or Fracture
Symptoms include reduced throughput, oversized product, and abnormal impact sounds. Root causes often involve excessive material hardness, uneven feed distribution, or loose mounting hardware. Using high-quality wear-resistant plates and maintaining even feed can significantly extend service life.
Toggle Plate Breakage
Although designed as a protective component, frequent toggle plate failure may indicate overload, discharge blockage, or improper adjustment of the discharge opening. Immediate shutdown and system inspection are required when this occurs.
Eccentric Shaft Damage
Severe vibration, abnormal noise, or complete shutdown can signal shaft wear or bending. Causes typically include chronic overloading or lubrication failure. Prompt repair or replacement is essential to prevent further structural damage.
Importance of Lubrication and Alignment
Proper lubrication ensures smooth operation of bearings and moving components. Incorrect lubricant type, insufficient quantity, or contamination can quickly lead to overheating and premature wear. Regular alignment checks of belts, pulleys, and drive systems also help maintain stable performance.
Establishing a Preventive Maintenance Strategy
Transitioning from reactive repair to proactive maintenance reduces unexpected downtime. Routine inspections, accurate maintenance records, and timely replacement of worn parts improve overall equipment effectiveness and extend machine lifespan.
Contact Information
Annie Lu | Huatao Group
Email: annie.lu@huataogroup.com
Mobile: +86 18032422676
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