Dongfeng KR truck parts lifting switch spiral wire Bracket 3750131-C5101

Built to fix and protect the lifting switch spiral wire, this bracket features a robust structure crafted from Q235 carbon steel with a 3mm-thick base and integrated reinforcing ribs. The tensile strength of Q235 steel reaches 375-500MPa, enabling the bracket to withstand a static load of 50kg (the maximum tension of the spiral wire during full extension) without deformation. The spiral wire clamping area adopts a semi-circular groove design with a rubber liner, increasing the contact area by 60% compared to flat clamps and preventing the wire from slipping during vehicle vibration. Finite element analysis confirms the bracket maintains structural integrity under 20g vibration loads (5-2000Hz, ISO 16750-3), ensuring the spiral wire stays securely fastened even in off-road or bumpy road conditions

Beyond fixation, the bracket is optimized to protect the spiral wire from abrasion and damage. The semi-circular clamping groove is lined with a 2mm-thick EPDM rubber pad that has a Shore hardness of 55±5, creating a buffer between the metal bracket and the spiral wire’s insulation layer. This rubber pad reduces friction by 75% during the spiral wire’s extension and retraction, preventing insulation wear that causes short circuits. The bracket’s edges are fully deburred and rounded (radius 2mm) to avoid cutting the wire’s surface, while the 35mm clamping diameter provides sufficient space for the wire to move freely without squeezing. These protective features extend the spiral wire’s service life by 40% compared to un-bracketed or poorly fitted alternatives

Designed for the diverse operating environments of Dongfeng KR trucks—from coastal high-salt areas to dusty construction sites—the bracket exhibits exceptional corrosion resistance. It undergoes a three-layer anti-corrosion treatment: zinc phosphate pretreatment, electrophoretic coating (80μm thickness), and powder coating (60μm thickness). This coating system passes 1500-hour neutral salt spray testing (ASTM B117) with no red rust, ensuring durability in coastal regions. The EPDM rubber pad resists oil, diesel, and cleaning agents, with no swelling or degradation after 72-hour immersion. The bracket operates stably at temperatures ranging from -40℃ (northeast China winters) to 85℃ (engine compartment heat), maintaining performance without material brittleness or softening

Optimized for efficient fleet maintenance, the bracket features a user-friendly design that simplifies installation and reduces downtime. It comes with 4 pre-matched M6×12 stainless steel bolts and lock washers, which align perfectly with the dashboard’s original mounting holes. Installation requires only a Phillips screwdriver, with a torque of 8-10N·m to secure the bolts—one technician can complete installation in 15 minutes, 60% faster than non-OE brackets. The semi-circular clamping groove allows tool-free spiral wire installation: simply place the wire in the groove and fasten the plastic buckle. Clear laser markings (“UP”/“WIRE IN”) prevent installation errors. With a service life of ≥200,000km and no regular maintenance required, it minimizes replacement frequency and reduces long-term operational costs for fleet operators