The Swing Arm Mechanism is a precision-engineered valve actuation system that ensures accurate and reliable control of intake and exhaust valves in the Sitrak C7H engine. This comprehensive assembly includes all necessary components for a complete rocker arm replacement or overhaul.
This high-quality Swing Arm Mechanism kit features the External Circlip for Shaft 32X1.5, Washer, Exhaust Rocker Arm Assembly, Hexagon Nut M10X1, Adjusting Screw, Rocker Arm Pedestal, Rocker Arm Shaft Assembly, Hexagon Socket Head Cap Screw GB/T70.1-M12×60-10.9-MAN183-PHR, and Intake Rocker Arm Assembly. Every component is manufactured to OEM specifications for a perfect fit and reliable operation under extreme operating conditions.
The Swing Arm Mechanism is designed to convert the rotational motion of the camshaft into precise linear motion of the valves, ensuring optimal engine breathing and combustion efficiency. The rocker arms feature roller followers for reduced friction and wear, while the adjustable pushrods allow for precise valve lash setting, contributing to reduced engine noise and extended valve train life.
For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models for the Swing Arm Mechanism.
Whether you are performing a full valve train overhaul or replacing worn rocker arms, this Swing Arm Mechanism delivers factory-quality components and a straightforward installation. This Swing Arm Mechanism is the definitive choice for operators who demand reliable valve actuation, reduced friction, and long engine life.
This external retaining ring secures the rocker arm shaft within the pedestal. In the Swing Arm Mechanism, it is made of spring steel with a corrosion-resistant coating, providing reliable axial retention and preventing shaft movement under high dynamic loads.
These hardened steel washers are used under bolt heads and nuts to distribute clamping load evenly. In the Swing Arm Mechanism, they protect the bearing surfaces and prevent galling, ensuring consistent torque retention and long-term reliability.
This assembly actuates the exhaust valves, transferring motion from the camshaft to the valve bridge. In the Swing Arm Mechanism, it features a roller follower and a hardened steel contact pad, providing smooth operation and reduced friction. The assembly includes a precision-bored bushing and a hydraulic lash adjuster for automatic clearance compensation.
This fine-pitch locknut secures the adjusting screw in position. In the Swing Arm Mechanism, it is made of grade 10 steel with a nylon locking patch, providing a vibration-resistant fastening that maintains the valve lash setting over extended operating periods.
This precision-ground screw allows for accurate valve clearance adjustment. In the Swing Arm Mechanism, it features a hexagon socket drive and a hardened tip that interfaces with the valve bridge, enabling precise setting of valve lash to factory specifications.
This cast iron pedestal supports the rocker arm shaft and provides a mounting interface to the cylinder head. In the Swing Arm Mechanism, it is precision-machined to ensure accurate alignment of the rocker arms, and includes oil galleries for lubrication of the shaft and bushings.
This is the main support shaft for the rocker arms, made of case-hardened steel with precision-ground bearing surfaces. In the Swing Arm Mechanism, it includes integrated oil feed holes that supply lubricant to the rocker arm bushings, ensuring long-term wear resistance.
This high-strength socket head cap screw secures the pedestal to the cylinder head. With a grade of 10.9 and a length of 60mm, it provides the necessary clamping force to withstand the dynamic loads of the valve train. The MAN183-PHR specification ensures compatibility with the Sitrak C7H engine.
This assembly actuates the intake valves, mirroring the design of the exhaust rocker arm. In the Swing Arm Mechanism, it is identical in construction but features a different geometry to match the intake cam lobe profile, ensuring precise valve timing and optimal airflow.
The Swing Arm Mechanism ensures precise valve actuation, optimizing engine breathing and combustion efficiency. This results in improved fuel economy, reduced emissions, and enhanced engine performance, making it an essential component for any engine rebuild.
This Swing Arm Mechanism kit includes every component required for a full rocker arm replacement – from the shaft and pedestal to the rocker arms, adjusting screws, and all fasteners. No need to source individual parts, saving time and ensuring compatibility.
The Swing Arm Mechanism incorporates roller followers on both intake and exhaust rocker arms, significantly reducing friction and wear compared to sliding-type rocker arms. This extends the service life of the camshaft and valve train components, reducing maintenance costs.
The Swing Arm Mechanism is manufactured to the exact OEM specifications, guaranteeing a perfect fit on the Sitrak C7H engine. The high-strength materials and precision machining ensure reliable operation under extreme loads, providing peace of mind for fleet operators.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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