Dongfeng VL truck spare parts Direct pull rod sleeve 3412114-K74M0

Built to endure the friction and stress of heavy-duty steering operations, the sleeve features a dual-material construction combining a steel outer shell and a polyurethane (PU) inner lining. The PU lining (Shore hardness 90±5) exhibits exceptional wear resistance, with a friction coefficient of only 0.15—reducing abrasion on the pull rod’s metal surface by 60% compared to rubber sleeves. It resists degradation from road dust, sand, and steering fluid, maintaining performance even in construction or mining environments. The steel outer shell (Q235 steel) provides rigid support, preventing the sleeve from collapsing under the steering system’s maximum axial force (80kN). This composite design extends the sleeve’s service life to ≥180,000km, twice that of traditional rubber sleeves

As a key buffer component in the steering system, the sleeve integrates advanced vibration damping features to improve driving stability and comfort. The PU inner lining’s elastic modulus (15MPa) allows it to absorb 70% of torsional vibration from the steering knuckle (up to 15g vibration loads, ISO 16750-3), reducing vibration transmission to the steering wheel by 40%. This minimizes driver fatigue during long-haul trips and prevents loose steering caused by vibration-induced wear. The sleeve’s tapered ends fit tightly with the pull rod’s mating surfaces, eliminating play (≤0.1mm) in the steering linkage—ensuring precise steering response and reducing tire uneven wear by 30%

Designed to shield the direct pull rod’s connection from environmental damage, the sleeve features a fully sealed structure and anti-corrosion treatment. The PU lining forms a tight seal around the pull rod, preventing water, mud, and road salt from entering the connection point—critical for avoiding rust on the pull rod’s threads and steering knuckle arm. The steel outer shell undergoes zinc plating (10μm thickness) and passivation treatment, passing 1200-hour neutral salt spray testing (ASTM B117) with no red rust. The sleeve also resists chemical corrosion from diesel, engine oil, and road cleaning agents, maintaining structural integrity in temperatures ranging from -40℃ to 85℃—adapting to diverse climatic conditions across China

The direct pull rod sleeve is engineered for efficient installation and long-term cost savings, ideal for fleet operations. Its lightweight design (0.8kg) and smooth inner surface allow easy press-fit installation onto the pull rod using a standard hydraulic press—no specialized tools required. The sleeve’s pre-lubricated PU lining (with molybdenum disulfide grease) eliminates the need for on-site lubrication, reducing installation time by 50% (a single technician can complete replacement in 20 minutes). By preventing steering component wear and rust, it reduces steering system maintenance costs by 45% and avoids unplanned downtime caused by steering failures. Backed by a 1-year/100,000km warranty, it provides reliable support for heavy-duty logistics and construction applications