Dongfeng VL truck parts Right lower foot pedal bracket welding assembly 8405350-C4100

Built to withstand repeated pedal forces (up to 600N during emergency braking) and long-term structural stress, the bracket’s base material uses Q355B low-alloy high-strength steel—ideal for load-bearing automotive components. This steel delivers a minimum yield strength of 355 MPa, tensile strength of 470–630 MPa, and impact toughness of ≥34 J at -40°C, enabling the assembly to bear a maximum static load of 20kN without deformation. Critical weld joints (e.g., between the bracket body and pivot mount) are formed via robotized MIG welding (metal inert gas welding) with a weld bead size of 6mm×4mm, ensuring 100% penetration and weld strength ≥90% of the base material. Each weld undergoes ultrasonic flaw detection (UT) to eliminate internal defects (porosity, cracks), meeting ISO 15614-1 welding standards. Compared to manual-welded brackets, this robotized process reduces weld failure risk by 75% under frequent pedal use

Engineered to minimize stress concentration and improve force transfer, the bracket features a triangular reinforcement structure at the pedal pivot area—spreading forces (from the driver’s foot) evenly across the cab floor and chassis. It integrates 5mm-thick reinforcing plates at the chassis mounting points, increasing local load-bearing capacity by 40% and preventing bracket deformation under long-term use. The bracket body adopts a U-shaped cross-section (120mm×80mm×5mm wall thickness), enhancing torsional stiffness by 35% and reducing vibration-induced fatigue cracks during road driving (e.g., unpaved mining roads). Unlike flat-plate brackets that bend easily, this optimized design maintains pedal stability even after 300,000+ pedal cycles, matching the VL’s service life

Designed to resist corrosion from road salt, mud, and moisture (common in undercarriage and cab floor environments), the assembly undergoes a four-stage protective process. First, a chemical degreasing and derusting treatment removes surface contaminants. Next, a zinc phosphate conversion coating (60μm thickness) creates a porous base for coating adhesion. Then, an electrophoretic primer (80μm) forms a uniform moisture barrier, preventing rust from forming on steel surfaces. Finally, a high-gloss epoxy powder coating (70μm) is baked on (180–200°C curing) to resist chipping, chemical damage (diesel, brake fluid), and UV degradation. This coating system passes 1,200 hours of neutral salt spray testing without rust or peeling, ensuring durability in snowy, coastal, or mining regions—where corrosion is a major threat to bracket integrity

Designed for efficient replacement by fleet technicians, the assembly simplifies installation with user-friendly details. All mounting holes (pedal pivot and chassis) are drilled to H8 tolerance, ensuring perfect alignment with the VL’s M18 chassis bolts and M12 pedal shaft—avoiding cross-threading during assembly. The weld joints are ground smooth to eliminate sharp edges that could damage adjacent components (e.g., wiring harnesses, brake lines). The package includes 4 grade 10.9 high-tensile bolts (M18×60mm for chassis, M12×30mm for pedal pivot) and lock washers, pre-lubricated with molybdenum disulfide to prevent thread galling. Installation takes 45–60 minutes: remove the old bracket by detaching the pedal and chassis bolts, align the new bracket’s reference marks with the cab floor and chassis, torque the bolts to 220 N·m (chassis) and 120 N·m (pivot) per OEM specs, and verify pedal movement. Each unit undergoes dimensional inspection via CMM, load-bearing testing, and weld quality checks, backed by a 24-month warranty against defects (weld cracking, coating peeling, dimensional inaccuracies)