Dongfeng KL truck parts Bracket for lifting switch spiral wire 3750131-C3100

Built as the core fixing component for the lifting system’s electrical connection, this bracket features a precision-engineered structure to stabilize the spiral wire and switch. It integrates a U-shaped wire groove (12mm width, 8mm depth) that securely holds the spiral wire, preventing tangling or kinking during the wire’s extension/retraction (up to 500mm stroke). A raised boss (15mm height) with a Φ12mm hole fixes the lifting switch, ensuring it remains stationary even during cab vibration (10-500Hz). The bracket’s 3mm-thick mounting flange distributes pressure evenly across the control panel, avoiding deformation that could misalign the switch. The overall design maintains a 20mm clearance between the spiral wire and adjacent components, preventing friction-induced wear

Engineered to endure the repeated stress of spiral wire movement and cab vibration, the 3750131-C3100 bracket is constructed from cold-rolled steel (Q235 grade) with post-forming heat treatment. This material achieves a tensile strength of 420MPa and yield strength of 235MPa, capable of withstanding a static load of 50N without bending—far exceeding the dynamic tension of the spiral wire (≤10N). The bracket undergoes a stamping process with dimensional tolerance ±0.3mm, ensuring consistent fit across all Dongfeng KL models. A reinforced rib (5mm height) along the U-shaped groove enhances structural rigidity by 40%, preventing fatigue cracks even after 100,000+ spiral wire extension cycles (equivalent to 300,000km of typical operation)

Optimized to resist corrosion and wear in the truck’s cab interior, the bracket adopts a multi-layer protective coating system. The base layer is a zinc-phosphate conversion coating (10μm thickness) for rust priming, followed by a cathodic electrophoretic coating (30μm thickness) that forms a seamless anti-corrosion barrier. The top layer is a black powder coating (40μm thickness) with excellent adhesion, passing 1500-hour neutral salt spray testing (ASTM B117) with no rust or peeling—ideal for coastal or snowy regions where road salt causes corrosion. The wire groove’s inner surface is polished to a smooth finish (Ra ≤0.8μm), reducing friction between the spiral wire and bracket by 30% and extending the wire’s service life by 50%

This spiral wire bracket is designed for efficient installation and long-term cost savings for Dongfeng KL operators. Its lightweight design (120g) and pre-drilled holes allow a single technician to complete replacement in 15 minutes using only a 4mm hex wrench—no specialized tools needed. The OE-compatible design ensures perfect alignment with the lifting switch and spiral wire, avoiding the misalignment issues of aftermarket brackets that cause switch failure or wire breakage (repair costs up to $200). By stabilizing the spiral wire, it prevents premature wear (average spiral wire replacement cost $80+) and ensures reliable lifting system operation—critical for construction trucks that rely on frequent cargo lifting. Backed by a 2-year/200,000km Dongfeng warranty, it provides predictable maintenance expenses and minimizes downtime