crusher Benefits & Advantages 1. Hydraulic adjustment devices. Convenient to adjust discharge opening size. 2. Cone frame is cast steel structure; High pressure points are reinforced by hard steel 3.New special design, simple and reasonable structure, smooth and stable running and low operation cost. 4. Hydraulic release system consists of several hydraulic cylinders. Easy to release jammed materials. 5. Each side of drive-shaft is equipped with roller bearings. Bearing base uses seal ring to prevent lubricating oil leakage. 6."Spring type" over-load protection. This release system allows unbroken materials to pass through without causing damage. 7. A complete lubricating oil circle system, including oil pump, oil reserve tank, oil pipeline, etc. If oil temperature is over high or oil flows slowly, the machine can be shut down automatically. This protection extends crushers service life.