Dongfeng KL truck parts Clock spring assembly 3774150-C3302

Engineered to maintain uninterrupted electrical connection between the fixed steering column and rotating steering wheel, the assembly uses a high-quality flat ribbon cable (24 AWG tinned copper conductors) with 12 circuits. The cable is wrapped around a precision-machined plastic rotor, designed to unwind and rewind smoothly during steering rotation without tangling or stretching. Each circuit features gold-plated contacts (50μm thickness) that ensure low contact resistance (≤ 10mΩ) and corrosion resistance, guaranteeing stable signal transmission for critical functions: horn, airbag deployment, steering wheel controls (audio, cruise, phone), and steering angle sensor data. Unlike low-quality clock springs with copper-plated contacts that oxidize, this design maintains signal integrity through 100,000+ steering cycles, preventing function failures (e.g., unresponsive horn or airbag warning lights)

Built to withstand the vibrations, temperature fluctuations, and mechanical stress of truck steering systems, the clock spring features a robust structure. The outer housing is made of impact-resistant ABS plastic (UL94 V-0 flame-retardant rating) that resists cracks from road vibrations or accidental impacts during maintenance. The internal rotor and stator are reinforced with glass-filled nylon (PA66-GF30) that maintains dimensional stability under extreme temperatures (-40°C to 85°C), avoiding binding during steering rotation. The flat ribbon cable is coated with a heat-resistant polyimide layer that resists wear from repeated winding, extending cable life by 300% compared to standard PVC-coated cables. Unlike plastic components that warp in high heat, this rugged construction ensures reliable operation for 150,000+ km of truck use

Designed to prevent damage from incorrect installation or over-rotation, the assembly includes multiple safety mechanisms. It features a pre-installed rotation stop pin that limits steering movement to the OEM-specified 3.5 turns, preventing the ribbon cable from overstretching (a common cause of cable breakage). The electrical connector is keyed and color-coded to match the Dongfeng KL’s wiring harness, eliminating reverse insertion that could short-circuit the airbag system or steering controls. Additionally, the housing has alignment marks that align with the steering column’s reference points, ensuring technicians install the clock spring in the correct neutral position—critical for accurate steering angle sensor calibration. Unlike unprotected clock springs that fail due to misinstallation, these features reduce installation errors by 90% and protect the assembly from mechanical damage

The clock spring assembly complies with global automotive safety standards, including ISO 61508 (functional safety for electrical systems) and FMVSS 208 (airbag system requirements), ensuring it meets the strict safety criteria for Dongfeng KL’s airbag deployment system. It undergoes rigorous testing: electrical continuity checks (100% circuit verification), rotation durability testing (150,000 cycles), vibration testing (200,000 cycles at 10–2,000 Hz), and temperature cycling (-40°C to 85°C for 1,000 cycles). The assembly also includes a built-in diagnostic resistor that communicates with the truck’s ECU, enabling real-time monitoring of clock spring health (triggering a warning light if a fault is detected). Backed by a 24-month warranty against manufacturing defects (e.g., cable breakage, contact corrosion, or rotation stop failure), it provides Dongfeng KL truck owners with reliable steering wheel function and critical safety system performance