Dongfeng KL truck parts Rear suspension right bracket with rubber sleeve assembly 5001120-C3302

The assembly features a pre-installed high-performance rubber sleeve (made of EPDM rubber with 60±5 Shore A hardness) that acts as a buffer between the metal bracket and suspension linkage. The rubber sleeve’s internal structure includes a hollowed center with radial ribs, which absorbs 70% of road vibrations (up to 2000 Hz) and reduces noise transmission to the cab—critical for improving driver comfort during long hauls. It also allows for slight angular movement (±5°) of the suspension linkage, accommodating the dynamic motion of the rear axle during cornering or uneven road conditions. Unlike separate rubber bushings that require press-fitting during installation, this integrated design ensures proper rubber-sleeve alignment, prevents premature wear from misinstallation, and extends the sleeve’s service life to 80,000+ km

Crafted from Q355ND low-alloy weathering steel—a material optimized for heavy-duty truck structural components—the bracket delivers exceptional load-bearing capacity. It has a tensile strength of 510–650 MPa and a yield strength of ≥355 MPa, enabling it to withstand the maximum static load of Dongfeng KL’s rear suspension (up to 120 kN) and dynamic loads from sudden braking or road impacts. The bracket’s structure is reinforced with triangular ribbing at stress concentration points (e.g., mounting hole edges, linkage connection area), which reduces deformation by 45% compared to non-ribbed brackets. Unlike ordinary carbon steel brackets that bend under heavy loads, this high-strength design maintains structural integrity through 150,000+ km of operation, ensuring reliable support for the rear suspension system

Engineered to resist corrosion from road salt, moisture, and mud—common in truck undercarriage environments—the bracket undergoes a multi-step surface treatment process. First, it is pickled and phosphatized to remove rust and create a corrosion-resistant base layer. Then, it is coated with a zinc-rich epoxy primer (80μm thickness) and a topcoat of polyurethane paint (60μm thickness), passing 1,200 hours of neutral salt spray testing without red rust. The rubber sleeve is treated with a UV-resistant coating that prevents hardening or cracking from prolonged sun exposure, maintaining flexibility in temperatures ranging from -40°C to 80°C. Unlike uncoated brackets that corrode within 2–3 years, this treatment ensures the assembly operates reliably in coastal, snowy, or off-road environments for 6+ years

The assembly features precision-machined mounting holes and rubber-sleeve housing to ensure accurate installation and long-term stability. All mounting holes are drilled using CNC machining centers with a tolerance of H8, ensuring a tight fit with OEM-grade bolts (M18×50mm for frame mounting) and eliminating looseness from oversized holes. The rubber-sleeve housing is bored to a precision of H7, ensuring the integrated sleeve is held securely without excessive compression (which would reduce vibration-damping performance). Installation takes 30–40 minutes with standard hand tools, as the bracket aligns with the truck’s factory mounting marks and requires no additional adjustments. Each unit undergoes strict testing: load-bearing trials (150% of rated load for 1 hour), rubber-sleeve vibration testing, and dimensional verification via coordinate measuring machine (CMM). Backed by a 24-month warranty against manufacturing defects (e.g., bracket cracking, rubber-sleeve wear, or corrosion), it provides Dongfeng KL truck owners with reliable rear suspension support and enhanced driving comfort