Dongfeng VL Right joint assembly drag link 3412160-K74M0

Unlike separate drag link rods and joints that require on-site assembly, this component comes as a fully pre-assembled unit, including the main drag link rod, two high-precision ball joints (one at each end), dust boots, and locking nuts. The ball joints are pre-lubricated with high-temperature grease (resistant to up to 120°C) to reduce friction and prevent premature wear, ensuring smooth rotational movement during steering. The integrated design not only simplifies installation (cutting down assembly time by 50% compared to separate parts) but also ensures all components are calibrated to OE tolerances—critical for maintaining stable steering response and preventing play in the steering system

To withstand the high torque, lateral forces, and constant stress of heavy-duty truck steering, key components are crafted from premium materials. The main drag link rod is made of 40Cr alloy steel (heat-treated for enhanced hardness, with a Rockwell hardness of HRC 28-32), providing exceptional tensile strength (minimum yield strength of 785MPa) and impact resistance—capable of supporting the weight and load of Dongfeng VL trucks (up to [add specific data if available, e.g., "49 tons GVW"]) without bending or breaking. The ball joint housings are made of forged steel (higher density than cast steel) to resist deformation, while the ball studs are chrome-plated to reduce corrosion and improve wear resistance, extending the assembly’s service life to 150,000+ km under normal use

Each ball joint is equipped with a double-lip rubber dust boot (made of nitrile rubber, resistant to oil, ozone, and aging) that forms a tight seal around the joint. This seal effectively blocks dust, mud, water, and road debris from entering the ball joint cavity—preventing grease contamination and metal-on-metal wear, which are major causes of premature joint failure. The dust boot is secured with stainless steel clamps at both ends, ensuring it stays in place even during extreme steering angles or rough road conditions. Additionally, the boot’s flexible design allows for full articulation of the ball joint without cracking, maintaining protection throughout the assembly’s lifespan

Every component of this right joint assembly undergoes CNC precision machining to achieve tight dimensional tolerances (±0.05mm for key mating surfaces). This ensures the ball joints rotate smoothly with minimal play (less than 0.5mm axial movement), a critical factor for maintaining precise steering control—especially during high-speed driving or when navigating narrow roads. The drag link rod’s threads are rolled (not cut) to improve thread strength and ensure secure locking with the steering knuckle, preventing thread stripping under heavy loads. Furthermore, the assembly undergoes a 100% end-of-line testing (including torque testing, play measurement, and visual inspection) to ensure it meets Dongfeng’s strict quality standards, guaranteeing reliable steering performance and reducing the risk of steering-related accidents