The Main Drive Shaft is a critical driveline component that transmits engine torque from the transmission to the rear axle, ensuring smooth and reliable power delivery in the Sitrak C7H heavy-duty truck. This precision-engineered shaft is designed to withstand extreme torsional loads and provide long-lasting performance.
This complete Main Drive Shaft kit includes the Drive Shaft, Hexagon Head Bolts M14*1.5, and Type 2 Hexagon Nuts M14*1.5. Every component of this Main Drive Shaft assembly is manufactured to OEM specifications, guaranteeing a perfect fit and reliable operation under the most demanding conditions.
The Main Drive Shaft is constructed from high-strength alloy steel tubing with precision-machined yokes and splined ends. It features dynamic balancing to minimize vibration and is coated with a durable anti-corrosion finish to resist rust and wear. This Main Drive Shaft is designed to handle the high torque output of the C7H engine while maintaining excellent durability.
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 Main Drive Shaft.
Whether you are performing a full driveline overhaul or replacing a worn shaft, this Main Drive Shaft delivers factory-quality performance and reliability. This Main Drive Shaft kit includes all necessary fasteners for a straightforward, professional installation.
The central component of the Main Drive Shaft assembly, this precision-manufactured tube is made from high-strength DOM steel with a wall thickness of 4.5mm. It features induction-hardened bearing journals and internally splined yokes that accommodate up to 2,500 Nm of torque. The shaft is dynamically balanced to ISO 1940 standards, ensuring vibration-free operation at speeds up to 4,500 rpm. A protective zinc-nickel coating provides excellent corrosion resistance, making this Main Drive Shaft suitable for use in all climates and road conditions. The shaft is also equipped with a greaseable center bearing for extended service intervals.
These high-strength bolts are used to secure the universal joint flanges to the Main Drive Shaft. Manufactured from chromium-vanadium steel and heat-treated to grade 10.9, each bolt has a tensile strength of 1040 MPa. The M14*1.5 fine-pitch thread provides excellent clamping force and resistance to loosening under high torque loads. The bolts feature a zinc-flake coating for superior corrosion protection and are supplied with a pre-applied thread locker to ensure a secure, leak-free connection. In the Main Drive Shaft assembly, these bolts are critical for maintaining driveline integrity and preventing flange separation.
These all-metal locknuts are paired with the hexagon head bolts to secure the driveline flange. The Type 2 nut features a deformed thread that provides prevailing torque, effectively preventing loosening due to driveline vibrations. Made from quenched and tempered steel with a tensile strength of 1000 MPa, these nuts are zinc-flake coated for durability. In the Main Drive Shaft system, they ensure a permanent, vibration-resistant joint that maintains the correct preload over the service life of the vehicle. The nuts are reusable up to three times and meet international fastening standards.
The Main Drive Shaft is manufactured from high-grade DOM steel tubing with a precisely controlled wall thickness. The yokes are forged and machined to exact tolerances, ensuring perfect alignment and minimal runout. This results in a shaft that delivers smooth, vibration-free power transmission and extended service life.
Each Main Drive Shaft undergoes precision dynamic balancing using state-of-the-art equipment. This process eliminates residual imbalance, ensuring that the shaft operates silently and smoothly at all speeds, reducing wear on universal joints, bearings, and the transmission.
This Main Drive Shaft kit includes all the required grade 10.9 bolts and self-locking nuts, pre-coated with thread locker for secure assembly. The correct fasteners eliminate guesswork and ensure that the driveline is properly torqued, reducing the risk of failure.
The Main Drive Shaft is manufactured to the exact OEM dimensions, guaranteeing a direct fit on the Sitrak C7H without modifications. The advanced zinc-nickel coating provides superior protection against road salt, moisture, and chemicals, ensuring long-term reliability.
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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