Dongfeng Kinland truck Rear suspension spring shock absorber assembly 5001150-C0302

A key advantage of the 5001150-C0302 assembly is its dual-stage damping system and high-tensile coil spring, optimized for Kinland’s heavy-duty operations. The hydraulic shock absorber uses a velocity-sensitive valve: it delivers soft damping for minor bumps (enhancing driver comfort) and increases force during high-speed impacts or potholes to prevent “bottoming out.” The 60Si2Mn steel spring offers 3,500kg load-bearing capacity per unit, supporting Kinland’s 20-ton max cargo weight while maintaining road contact. Its progressive winding (tighter top coils, looser bottom) adapts to variable loads, keeping ride height stable whether hauling light packages or heavy materials. This design reduces tire bounce, improves traction on wet/icy roads, and cuts driver fatigue during long routes—critical for maintaining control and protecting cargo in rough terrain

Built to withstand rigorous truck operations, the 5001150-C0302 assembly uses industrial-grade materials. The shock absorber’s 3mm-thick ST52-3 steel cylinder resists deformation under 30MPa pressure and road debris impact. Its chrome-plated piston rod (0.05mm coating, DIN 50961 standard) boosts corrosion resistance and reduces seal friction, extending service life to 200,000+ km. The coil spring undergoes 850°C quenching and 450°C tempering, achieving 1,800MPa tensile strength to avoid permanent deformation under heavy loads. Mounting brackets and spring seats have a 12-15μm zinc-nickel coating (1,000-hour salt spray resistance) to fight rust from road salt or mud. FKM rubber seals handle -40°C to 120°C temperatures, preventing oil leaks. Tested to 500,000+ suspension cycles and 500-hour load tests, it delivers 5+ years of reliable use, lowering fleet maintenance costs

The 5001150-C0302 assembly adapts to Kinland’s diverse cargo requirements, ideal for fleets with variable loads. Optional shims (included) let technicians adjust spring preload—adding a 2mm shim increases capacity by 500kg for heavy cargo, while removing shims softens the ride for light loads. A accessible valve on the shock absorber enables switching between “heavy-load” and “light-load” damping modes in 5 minutes, no disassembly needed. A load-indicating mark on the spring seat helps verify proper adjustment, preventing overloading/underloading that risks damage or safety issues. For Kinland trucks used in urban delivery and long-haul freight alike, this versatility eliminates the need for multiple suspension setups, saving time and money for operators

Safety is central to the 5001150-C0302 assembly’s design. A pressure relief valve limits damping pressure to 35MPa, preventing cylinder rupture during extreme impacts and avoiding sudden suspension failure. The spring’s ground, heat-treated ends prevent “spring creep” (slow deformation) that disrupts braking/steering alignment. The upper mounting bracket’s rubber bushing absorbs frame vibrations, reducing cargo damage—vital for fragile goods like electronics. Anti-foaming, anti-oxidation shock oil ensures consistent performance during 10+ hour shifts, preventing control loss from oil breakdown. In rare spring breakage cases, the lower spring seat catches the broken part, avoiding road hazards. Aligned with ISO 18797 and Dongfeng’s safety standards, it provides peace of mind for Kinland operators in high-risk environments