Troubleshooting Methods for Abnormal Noises and Moving Jaw Fractures in Jaw Crushers

Fault 1: Vibration or Impact Sounds During Operation of Moving and Fixed Jaw Plates

Cause: Loose or missing fastening bolts on jaw plates; undersized discharge opening causing bottom plates to collide.

Solution: Tighten or replace missing bolts; adjust discharge opening to ensure proper clearance between jaw plates.

Fault 2: Breakage of the movable jaw.

Causes: Severe casting defects such as dense porosity; use of substandard elbow plates or elbow plate pads, preventing self-breaking protection during high-impact crushing; Displacement of the moving jaw within the frame, causing one end to strike the frame side guard plate; failure to replace the tie rod spring promptly after tension loss; discharge opening smaller than specified limits; incorrect feed positioning (skewed toward one end) or excessively steep hopper angle, causing material to strike the moving jaw head directly.

Remedial Measures: Replace the moving jaw, simultaneously installing genuine elbow plates and pads manufactured by the original equipment manufacturer (OEM). Correctly assemble the eccentric shaft, bearings, locking bushings, and moving jaw. Replace damaged components and the tie rod spring. Adjust the discharge opening according to specifications.

Since its establishment, OCP Heavy Industry has specialized in developing and manufacturing complete sets of equipment for crushing, screening, grinding, washing, feeding, conveying, environmental protection, dust removal, as well as steel, metallurgy, and steel slag processing and recycling. Our products are widely applied in the crushing and processing of metals, non-metallic minerals, energy raw materials, and metallurgical waste residues within the steel and metallurgical sectors. We have earned the trust of our customers through superior product quality, high equipment operational efficiency, lower operating costs, and strict adherence to safety and sustainable development standards. Click the website chat icon for immediate free consultation—available 24/7.