Dongfeng GX truck part First level step left connection bracket 8406161-C6200

To withstand prolonged road vibration and minor under-vehicle impacts, the 8406161-C6200 bracket features an optimized triangular structure—refined via finite element analysis (FEA) to distribute stress evenly across the chassis and step. The bracket’s chassis-connection section integrates two 4mm-thick diagonal ribs (thicker than prior models) that reduce bending stress by 45% during step use, while the step-connection surface is milled to a smooth finish (surface roughness: Ra 3.2μm) for a tight, stable fit with the step plate. An upgraded rubber anti-vibration gasket (shore hardness: 60±5A) is included between the bracket and chassis, absorbing 82% of road vibration (frequency range: 10-2600 Hz)—a 5% improvement over previous versions—to prevent bracket loosening or weld fatigue during long-haul driving. Additionally, the bracket’s edges are rounded (5mm radius) to avoid sharp protrusions that could damage nearby components or pose safety risks during maintenance

Exposed to road salt, rain, mud, and humidity—common in under-vehicle environments—the 8406161-C6200 bracket undergoes an advanced four-step anti-corrosion process to extend service life. First, a zinc phosphate pretreatment (15-17μm thick) creates a porous base for enhanced coating adhesion. Second, an electrophoretic primer (22-25μm thick) provides uniform coverage, even in hard-to-reach weld joints, forming a robust barrier against rust. Third, an epoxy mid-coat (18-20μm thick) adds an extra layer of protection against chemicals. Finally, a matte-black polyester powder coating (85-95μm thick) meets ISO 10289 standards, passing 1500-hour neutral salt spray tests without red rust formation—30% longer than previous anti-corrosion treatments. This protection ensures the bracket resists degradation in coastal (saltwater), snowy (road salt), or industrial (chemical debris) areas, maintaining structural integrity for over 10 years

Exclusively tailored for Dongfeng GX heavy-duty trucks (including 2022+ cargo, long-haul, and dump variants), the 8406161-C6200 bracket adheres to updated original equipment (OE) specifications. Manufactured using 3D laser scanning of the GX’s left-side chassis and revised first-level step mounting points, it achieves dimensional accuracy within ±0.1mm—matching every hole position, contour, and connection feature of the truck’s latest factory design. The bracket includes 6 pre-drilled mounting holes (M10 threaded, 15mm depth)—one more than prior models—for enhanced stability, aligning perfectly with the GX’s chassis rails and updated step assembly. It eliminates gaps that could cause rattling, misalignment, or premature wear, and requires no drilling, grinding, or modification to the vehicle’s factory-mounted components, ensuring compatibility with all 2022+ Dongfeng GX models

The 8406161-C6200 bracket is designed for efficient, error-free installation, ideal for fleet maintenance teams or repair shops. It comes with an upgraded OE-spec hardware kit: 6 grade 12.9 high-strength hexagon bolts (stronger than the previous grade 10.9) with anti-loosening nylon washers, 6 lock nuts, and 2 rubber anti-vibration gaskets (one spare for convenience). Installation requires only standard hand tools (13mm socket wrench) and can be completed by two technicians in 20-25 minutes—5 minutes faster than prior models—thanks to clear alignment marks on the bracket. The process involves aligning the bracket with the chassis and step mounting points, securing with bolts, and torquing to 48±4 N·m (per Dongfeng’s updated safety specifications). The kit includes a color-coded installation guide with torque values and step-by-step diagrams, reducing errors. The bracket’s lightweight design (3.8kg) simplifies handling, while its powder-coated surface resists scratches during installation—maintaining a professional appearance for fleet vehicles