Dongfeng VR truck parts Rear Mount Spring Shock Absorber Assembly 5001150-C1100

Designed to work in tandem to reduce vibration and(bump) during driving, the assembly combines a high-performance coil spring and hydraulic shock absorber. The coil spring is made of 50CrVA alloy steel (heat-treated to HRC 45–48) with 8 active coils, delivering a spring rate of 35 N/mm—effectively absorbing large impacts from potholes or rough roads. The hydraulic shock absorber uses a twin-tube design with multi-stage damping valves that adjust oil flow based on vibration intensity: soft damping for small road vibrations (e.g., gravel) and firm damping for sudden impacts (e.g., curbs). This synergy reduces cab vibration by 55% compared to worn assemblies, improving driver comfort during long-haul trips and protecting fragile cargo (e.g., electronics, perishables). Unlike single-component suspension parts that fail to balance comfort and stability, this integrated design ensures smooth driving without compromising handling

Built to withstand the high loads and constant stress of truck suspension systems, the assembly uses premium materials for all critical components. The shock absorber cylinder is made of 2.5mm-thick seamless steel tubing (20# steel) with a chrome-plated piston rod (10μm thickness) that resists wear and corrosion—enduring 100,000+ stroke cycles (equivalent to 6 years of heavy use) without leakage. The coil spring undergoes shot peening treatment to increase fatigue resistance by 30%, preventing spring breakage under repeated loading. The mounting brackets are 8mm-thick Q345B steel with welded reinforcements at stress points, capable of withstanding 5,000N of lateral force without bending. Unlike lightweight suspension assemblies that deform under heavy loads, this heavy-duty design maintains structural integrity even when the truck is fully loaded (up to the VR’s maximum payload of 15 tons)

Engineered to resist corrosion from road salt, rain, and mud—critical for rear suspension components exposed to underbody contaminants—the assembly features comprehensive anti-corrosion treatment. The shock absorber cylinder and piston rod receive a triple-layer coating: zinc phosphate primer (60μm), electrophoretic paint (80μm), and a clear topcoat (30μm) that passes 1,000 hours of neutral salt spray testing. The coil spring is coated with epoxy powder (120μm thickness) that adheres tightly to the steel surface, preventing rust even in high-humidity environments. The mounting brackets are hot-dip galvanized (zinc coating ≥90μm) to resist chipping and peeling. Unlike uncoated or single-layer protected parts that rust within 1–2 years, this multi-layer design ensures the assembly remains corrosion-free for 8+ years of use

Designed for hassle-free replacement by fleet technicians or DIY owners, the assembly simplifies installation with precision-aligned features and complete hardware. It includes all necessary components: 4 M12×40mm stainless steel bolts, lock nuts, rubber bushings (for vibration damping), and a torque wrench guide (specifying 85 N·m for secure mounting). Installation takes 30–40 minutes: support the rear cab with a jack, remove the old assembly’s bolts, align the new assembly’s mounting holes with the frame brackets, secure the bolts to the specified torque, and lower the cab. No post-installation adjustment is needed—the pre-set spring tension and shock absorber damping match the VR’s factory specifications. Each unit undergoes compression testing (verifying spring rate), leak testing (checking shock absorber oil tightness), and dimensional verification via CMM, backed by a 24-month warranty against defects (e.g., spring breakage, shock absorber leakage, bracket bending)