Dongfeng KR truck parts Left Mounting Bracket Assembly 8406619-C5100

Built to withstand static and dynamic loads of mounted components (e.g., fuel tanks, batteries, or auxiliary equipment), the bracket assembly uses premium Q345B low-alloy structural steel with a minimum yield strength of 345 MPa. The main bracket body is formed via precision stamping and robotic welding, with 8mm-thick reinforced sections at stress points (e.g., mounting hole peripheries and load-bearing edges) to distribute weight evenly. Finite Element Analysis (FEA) testing confirms it can handle a static load of 7,500N (well above the KR’s typical component mounting load of 5,000N) without permanent deformation, and endure 120,000+ cycles of dynamic vibration (simulating road conditions) without fatigue cracking. Unlike low-carbon steel brackets that bend under stress, this high-strength design ensures stable component mounting throughout the truck’s service life

Engineered to serve as a flexible mounting solution for multiple Dongfeng KR components, the assembly features a multi-hole and multi-surface layout. It includes two sets of standardized mounting holes: one set compatible with the KR’s chassis frame (M12 bolts) for secure attachment, and another set (M10 bolts) for mounting auxiliary components like tool boxes, AdBlue tanks, or electrical enclosures. The bracket’s main body has a 120° angled structure (with a 5mm-thick vertical plate and 4mm-thick horizontal plate) that accommodates both vertical and horizontal component installation, while a 20mm-deep recessed area on the contact surface provides space for rubber gaskets (included) to prevent component slippage. Unlike single-purpose brackets that limit application, this multi-functional design reduces the need for multiple bracket types, simplifying inventory management for fleet operators

Designed to resist corrosion from road salt, mud, and moisture (critical for underbody or exterior-mounted brackets), the assembly undergoes a three-stage anti-corrosion treatment. First, a zinc phosphate conversion coating (60μm thickness) creates a porous base to enhance coating adhesion. Next, an electrophoretic primer (80μm) is applied to form a uniform moisture barrier, followed by a thermosetting polyester topcoat (50μm, RAL 9005 black) that resists chipping, fading, and chemical damage from diesel or cleaning agents. This coating system passes 1,200 hours of neutral salt spray testing (equivalent to 10 years of road salt exposure) without rust or coating peeling. The mounting holes are also tapped with precision threads and coated with anti-seize compound to prevent thread corrosion, ensuring easy bolt removal during maintenance or component replacement

Designed for hassle-free replacement by fleet technicians or DIY owners, the bracket assembly arrives fully pre-assembled (including all necessary washers and gaskets) to eliminate on-site assembly time. It includes a complete hardware kit: 4 M12×35mm high-tensile bolts, 4 M10×25mm bolts, lock washers, rubber anti-slip gaskets, and a torque guide (specifying 95 N·m for M12 bolts, 65 N·m for M10 bolts). Two laser-etched alignment marks on the bracket’s surface line up with reference points on the Dongfeng KR’s chassis, reducing installation time by 40% (typically 15–20 minutes). Installation steps are straightforward: clean the mounting surface, align the bracket’s marks with the chassis reference points, secure the bolts to the specified torque, and attach the target component. Each unit undergoes dimensional verification via CMM, load testing, and coating adhesion checks, backed by a 36-month warranty against defects (e.g., bending, cracking, or coating failure)