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Principle of operation of the rocker arms

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 Structurally, a rocker is a two-arm lever. At the end of the long arm is a hardened cylindrical surface called a brisk? It rests on the end of the valve stem. A bolt is screwed into the end of the rocker's short arm to adjust the depth of the gap between the rocker arms and the valve. A hole is drilled in the body of the short arm, which serves as a lubricant supply. Through the adjustment bolt, the lubricant passes from the rocker axis to the upper tip of the valve pushrod rod. Rockers are made from steel sheets by forming or from steel billets by casting or forging. Both shoulders of the rocker have a T-section. Rockers are made from steel sheets by forming or from a steel blank by casting or forging.  The axle used to fasten the rockers is hollow. A valve rocker, or rocker arm of Ram 4.7 , is used to convert the translational movement of the pushrod rod upwards into the translational motion of the valve rod. From axial movements, the rocker, located in the middle between the t