Dongfeng VL truck parts Front suspension upper left bracket process assembly 5001950-C4105

Built to withstand the vertical and lateral forces of front suspension systems (critical for trucks hauling up to 15-ton front axle loads), the bracket is forged from Q355B low-alloy high-strength steel. This material delivers a minimum yield strength of 355 MPa and tensile strength of 470–630 MPa, enabling it to resist permanent deformation under a maximum static load of 9,000 N. The steel undergoes quenching and tempering (880°C quenching, 550°C tempering) to enhance fatigue resistance—passing 2 million load cycles (equivalent to 800,000 km of road use) without crack formation. Compared to ordinary carbon steel brackets, this Q355B design reduces the risk of bracket failure by 60% in high-stress scenarios (e.g., off-road hauling, sudden braking)

Engineered to optimize load distribution and torsional stiffness, the bracket features a triangular reinforcement structure at the shock absorber mounting area—spreading impact forces from road bumps across the front frame. It integrates 5mm-thick radial ribs (spaced 35mm apart) along the bracket’s edge, increasing torsional stiffness by 40% and minimizing twist during cornering. The control arm pivot interface is machined with a 0.8μm surface finish, ensuring tight fitting with the pivot bushing and reducing play to ≤0.3mm (critical for precise steering response). Unlike flat-plate brackets that lack structural support, this design maintains suspension alignment even when the truck operates on uneven terrain, preventing excessive tire scrub and improving fuel efficiency by 3%

Designed to resist corrosion from road salt, mud, and moisture (common in undercarriage environments), the bracket undergoes a four-stage protective treatment. First, a zinc phosphate conversion coating (50μm thickness) creates a corrosion-resistant base. Next, an electrophoretic primer (70μm) is applied to seal pores and enhance coating adhesion. Then, a high-build epoxy mid-coat (60μm) fills minor surface imperfections, followed by a UV-stabilized polyurethane topcoat (40μm) that resists chipping and chemical damage from diesel or road deicers. This coating system passes 1,200 hours of neutral salt spray testing (equivalent to 10 years of road salt exposure) without rust, ensuring durability in snowy, coastal, or mining 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 M16 suspension bolts) and deburred to avoid damaging bolt threads. The package includes 4 grade 10.9 high-tensile bolts (M16×55mm) and lock washers, pre-lubricated with molybdenum disulfide to prevent thread galling. Installation takes 35–45 minutes: remove the old bracket by detaching the control arm and shock absorber, align the new bracket’s pivot hole with the frame’s reference mark, torque the bolts to 185 N·m (per OEM standards), and verify suspension movement. Each unit undergoes dimensional inspection via CMM, load-bearing testing, and coating adhesion checks, backed by a 24-month warranty against defects (e.g., cracking, coating peeling, dimensional inaccuracies)