Dongfeng VL truck parts Front suspension lower left bracket process assembly 5001955-C4302

Built to withstand the high compressive, tensile, and torsional forces of front suspension operations, the bracket is crafted from 20Mn2 low-alloy structural steel—ideal for heavy-duty automotive components. This material delivers a minimum yield strength of 345 MPa and tensile strength of 490–630 MPa, enabling the bracket to bear a maximum dynamic load of 12,000 N without deformation (exceeding the VL’s front suspension design load by 25%). The steel undergoes normalizing heat treatment (920–960°C heating, air cooling) to refine its microstructure, enhancing impact toughness (≥40 J at -40°C) and resistance to fatigue failure. Compared to ordinary Q345 steel brackets, this 20Mn2 design extends service life by 60% under frequent load cycles (e.g., highway driving, off-road mining operations)

Engineered to improve suspension stability and reduce stress concentration, the bracket features a box-type closed structure at the axle mounting area—distributing vertical impact forces (from potholes or rough roads) evenly across the front axle. It integrates 6mm-thick reinforcing ribs (spaced 30mm apart) along the bracket’s length, increasing torsional stiffness by 45% and minimizing twist during sudden braking or sharp cornering. The stabilizer bar mounting slot is machined with a 1.6μm surface finish, ensuring tight fitting with the stabilizer bar bushing and reducing lateral play to ≤0.4mm (critical for preventing body roll). Unlike open-frame brackets that lack load-bearing capacity, this optimized design maintains suspension alignment accuracy even when the truck operates with full cargo loads, improving driving safety and reducing maintenance costs

Designed to resist corrosion from road salt, mud, and moisture (common in undercarriage environments), the bracket undergoes a five-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. A high-build epoxy mid-coat (70μm) fills minor surface defects, followed by a UV-stabilized polyurethane topcoat (50μm) that resists chipping, chemical damage (e.g., diesel, road deicers), and UV degradation. This coating system passes 1,500 hours of neutral salt spray testing without rust or peeling, ensuring durability in snowy, coastal, or industrial regions

Designed for efficient replacement by fleet technicians, the bracket simplifies installation with user-friendly details. All mounting holes are drilled to H8 tolerance (ensuring perfect alignment with the VL’s suspension bolts) and chamfered to avoid damaging bolt threads during assembly. The package includes 5 grade 10.9 high-tensile bolts (M18×60mm) and lock washers, pre-lubricated with anti-seize compound to prevent thread galling in high-temperature environments. Installation takes 40–50 minutes: remove the old bracket by detaching the lower control arm, stabilizer bar, and axle beam bolts, align the new bracket’s reference marks with the axle beam, torque the bolts to 220 N·m (per OEM specifications), and verify suspension movement. Each unit undergoes dimensional inspection via CMM (Coordinate Measuring Machine), load-bearing testing, and coating adhesion checks, backed by a 24-month warranty against defects (e.g., cracking, coating peeling, dimensional inaccuracies)