Dongfeng KC Right lower foot pedal bracket welding assembly 8405350-C4106

The assembly adopts an integrated welded structure composed of three key components: a main support plate (4mm-thick Q235 carbon steel), a triangular reinforcement rib (3mm-thick Q345 low-alloy steel), and a pedal mounting plate (5mm-thick Q235 steel). All welding joints are processed via semi-automatic CO₂ gas shielded welding (weld leg height: 6mm), with no porosity, slag inclusion, or incomplete fusion—each joint undergoes ultrasonic flaw detection (UT) to ensure structural integrity. After welding, the entire assembly undergoes stress relief heat treatment (600-650℃ for 2 hours) to eliminate internal welding stress, preventing deformation under long-term pedal pressure or road vibration

Base Material Performance: The Q235 and Q345 steel components offer a minimum tensile strength of 440MPa and yield strength of 235MPa, enabling the bracket to withstand up to 800N of continuous pedal pressure (meeting the maximum foot force of heavy-duty truck drivers during braking or acceleration).

Anti-Corrosion Surface Treatment: The assembly undergoes a three-step coating process for long-term durability: Degreasing and pickling to remove surface oil and rust; Zinc phosphate conversion coating (film thickness: 8-12μm) to enhance paint adhesion; High-temperature electrostatic spray painting (epoxy polyester powder, film thickness: 60-80μm) with a pencil hardness of ≥2H and glossiness of 60±5%

Designed to meet Dongfeng’s heavy-duty truck pedal system safety standards (DFM-S-007-2022), the assembly undergoes rigorous performance testing:

Static Load Test: Withstands a 1,200N static load (1.5 times the maximum design load) for 12 hours without permanent deformation or weld cracking.

Fatigue Test: Undergoes 100,000 cycles of dynamic load (300-600N) simulating repeated pedal operation (e.g., frequent braking in urban traffic), with no structural damage or functional failure—ensuring reliability for high-frequency use in long-haul or construction scenarios.Impact Test: Resists a 50J impact load (simulating accidental heavy foot contact) without cracking, protecting the pedal linkage from damage and maintaining normal pedal travel

Simplified Mounting Design: The assembly features pre-threaded mounting holes (M10×1.5, depth: 15mm) that align perfectly with the original chassis bolts. It includes 4 high-strength 8.8-grade zinc-plated hexagon head bolts, and installation only requires a torque wrench (recommended torque: 45-50N·m)—professional technicians can complete replacement in 25-30 minutes.

Component Compatibility: Fully compatible with Dongfeng KC’s original right lower foot pedal (Part No. 8405351-C4100) and pedal bushing, ensuring seamless integration with the existing pedal control mechanism—no modifications to the linkage or hydraulic/pneumatic systems are needed