Product Introduction

The Rock Arm 371 is a heavy-duty engine rocker arm assembly designed for SINOTRUK HOWO 371 trucks equipped with WD615 series diesel engines. The rocker arm is an essential component of the engine valve train system, responsible for transferring camshaft movement to the intake and exhaust valves for accurate engine valve operation.

During engine operation, the rocker arm converts the rotational motion of the camshaft into linear movement required to open and close the valves at precise timing intervals. Proper rocker arm performance is critical for maintaining engine combustion efficiency, fuel economy, power output, and overall engine stability.

Manufactured from high-strength alloy steel with precision heat treatment processing, the rocker arm provides excellent resistance to wear, fatigue, and high-temperature operating conditions commonly found in heavy-duty diesel engines.

This component is widely used in HOWO dump trucks, tractor trucks, and construction vehicles operating under demanding transport and mining conditions. OEM-standard machining ensures accurate installation dimensions and reliable compatibility with original engine systems.

Each rocker arm undergoes hardness testing, dimensional inspection, and fatigue durability testing before shipment to ensure stable long-term performance and dependable engine operation.

Technical Specifications

Vehicle Fitment

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Engine Parts System

Transmission & Drivetrain Parts

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