Dongfeng GX truck parts Lower bumper bracket assembly 8406220-C6200

Constructed from 5mm-thick high-strength alloy steel (Q355B grade)—with 7mm-thick welded reinforcement at stress points—the 8406220-C6200 assembly balances rigidity and impact resistance. The steel exhibits a tensile strength of ≥510 MPa, enabling it to withstand minor front-end impacts (e.g., curbs, rocks, or debris) without bending or cracking. Finite element analysis (FEA) optimizes the crossbar and support arm layout, reducing stress concentration by 40% compared to single-piece brackets. Unlike lightweight aluminum alternatives, it resists warping from extreme temperatures: maintaining shape at -35°C (cold climates) and 95°C (engine bay heat). This heavy-duty construction guarantees a service life of over 10 years, outperforming aluminum assemblies by 200% in harsh trucking environments (e.g., construction, mining, or long-haul)

Exclusively tailored for Dongfeng GX heavy-duty trucks (including cargo, dump, and tractor variants), the 8406220-C6200 assembly adheres strictly to original equipment (OE) specifications. Manufactured using 3D laser scanning of the GX’s chassis rails and lower bumper mounting area, it achieves dimensional accuracy within ±0.12mm—matching every hole position, contour, and connection feature of the factory design. The assembly includes eight pre-drilled M10 threaded holes (depth: 16mm) that align perfectly with the truck’s chassis reinforcement points and lower bumper, eliminating gaps that cause rattling, water infiltration, or wind noise. It is fully compatible with all Dongfeng GX models produced since 2022 and works seamlessly with the truck’s original bumper fasteners and adjustment mechanisms—requiring no drilling or modification to the vehicle’s chassis

To combat rust and degradation from road salt, rain, mud, and industrial chemicals, the 8406220-C6200 assembly undergoes a five-step OE-grade anti-corrosion process. First, a zinc phosphate pretreatment (15-17μm thick) creates a porous base for coating adhesion. Second, an electrophoretic primer (22-25μm thick) provides uniform coverage—even in hard-to-reach weld joints—to block moisture. Third, an epoxy mid-coat (18-20μm thick) adds a chemical barrier against road salts. Fourth, a cathodic electrocoat (10-12μm thick) enhances corrosion resistance for high-wear areas. Finally, a matte-black polyester powder coating (85-95μm thick) meets ISO 10289 standards, passing 1800-hour neutral salt spray tests without red rust formation. This protection ensures the assembly maintains structural integrity in coastal (saltwater), snowy (road salt), or industrial (chemical exposure) areas—critical for long-haul trucks operating across diverse climates

The 8406220-C6200 assembly is designed for efficient, error-free installation—ideal for fleet maintenance teams or repair shops. It includes a comprehensive OE-spec hardware kit: eight grade 12.9 high-strength bolts (with anti-loosening nylon washers), eight lock nuts, four rubber anti-vibration gaskets (shore hardness: 60±5A), and two alignment pins for precise positioning. Installation requires only standard hand tools (14mm socket wrench) and can be completed by two technicians in 40-45 minutes: align the assembly with the chassis rails using the included pins, secure bolts to 65±5 N·m (per Dongfeng torque specs), and attach the lower bumper. The kit includes a color-coded installation guide with torque values and step-by-step diagrams, minimizing errors. The assembly’s modular design (split support arms) simplifies handling, while its powder-coated surface resists scratches during installation—preserving a professional fleet appearance