Warranty: 1 YEARS ,Part name: Water valve assembly with stepper motor 8103036-C5100
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Body system
The water valve assembly with stepper motor (Part No. 8103036-C5100) is tailor-made as an exact OEM replacement for Dongfeng KR series commercial vehicles, including heavy-duty trucks and logistics carriers. It perfectly matches the vehicle’s original cooling system interfaces—with inlet/outlet pipe diameters of 32mm (compatible with standard 1.25-inch hoses) and a mounting bracket that aligns with the chassis’ pre-drilled holes. The electrical connector (4-pin waterproof type) directly plugs into the vehicle’s HVAC (Heating, Ventilation, and Air Conditioning) control unit, eliminating the need for wiring modifications and ensuring seamless communication with the vehicle’s ECU for synchronized temperature regulation
Product Attributes
Warranty: 1 YEARS ,Part name: Water valve assembly with stepper motor 8103036-C5100
PRODUCT DESCRIPTION
Precision Stepper Motor Drive Control
Equipped with a high-torque 24V DC stepper motor (step angle: 1.8°, holding torque: 0.5N·m), the assembly enables micro-adjustable valve opening control (0-100% in 0.5% increments). The motor responds to the HVAC system’s signals within 100ms, allowing real-time adjustment of coolant flow based on the cab’s target temperature. Unlike traditional solenoid valves, the stepper motor ensures stable positioning without drift—even under voltage fluctuations (18-32V), maintaining consistent coolant flow and preventing sudden temperature swings in the cab
High-Efficiency Coolant Flow Regulation
The valve core is precision-machined from brass (H62 material) with a smooth surface finish (Ra ≤ 0.8μm), minimizing flow resistance and ensuring a maximum flow rate of 80L/min (at 0.3MPa system pressure). The full-port design allows unobstructed coolant passage when fully open, supporting the vehicle’s engine cooling and cab heating/cooling demands. When partially closed, the valve maintains linear flow control—e.g., a 50% opening delivers exactly 40L/min—ensuring accurate temperature adjustment and reducing energy consumption of the HVAC system
Durable & Corrosion-Resistant Construction
The valve body is made of high-grade aluminum alloy (ADC12) with a hard anodized surface treatment, providing excellent resistance to corrosion from ethylene glycol-based coolants (common in automotive cooling systems) and passing 500-hour salt spray testing without rust. The stepper motor is enclosed in a IP6K6-rated housing, protecting internal components from dust intrusion and high-pressure water splashes (e.g., during undercarriage washing). Additionally, the valve’s sealing rings (made of nitrile rubber NBR) have a service life of over 5,000 cycles, ensuring leak-free operation even under long-term thermal cycling (-40℃ to 120℃)
Plug-and-Play Installation & Low Maintenance
Designed for hassle-free installation, the assembly comes with pre-assembled mounting hardware (M8 bolts and lock washers) and a flexible rubber gasket for the inlet/outlet connections. The entire installation process takes 20-30 minutes with basic hand tools (wrench and screwdriver), requiring no specialized calibration. For maintenance, the stepper motor is easily detachable via two screws—if the motor fails, it can be replaced independently without removing the entire valve body, reducing repair costs. The valve also features a built-in diagnostic function: if a fault occurs (e.g., motor jamming), it sends a signal to the vehicle’s instrument panel, enabling quick troubleshooting
TECHNICAL SUPPORT
1. Accessories selection consultation
- Provide ** intelligent selection tools ** (such as parts matching query system), input the vehicle model VIN code or engine model to match the corresponding parts number, reducing the selection error rate.
The technical team is available online 7×12 hours to answer technical questions about accessories (such as material compatibility and installation processes).
2. Customized development support
We offer specialized R&D services for special market demands (such as heat dissipation accessories for high-temperature regions in the Middle East and dedicated suspension components for road conditions in Africa), and complete sample delivery within six weeks.
3. Training and Technical materials
Provide remote/on-site training for the customer's after-sales team (such as diagnosis of electrical control accessories and DPF regeneration operation), along with multilingual versions of the "Accessories Installation Manual" and "Troubleshooting Guide".
4. Quality Traceability and Improvement
Through the QR code traceability system (one product, one code), track the production batch of accessories and the source of raw materials, respond quickly to quality complaints and initiate improvement processes.
AFTER-SALES AND LOGISTICS SUPPORT
After-sales service
Quality Assurance Policy
-The warranty period for original factory parts is 12 months (counting from the date of signature for receipt), covering material defects, process issues, and man-made damage.
- Provide "Localized Express repair Service" : Cooperate with third-party repair networks in markets such as Southeast Asia and the Middle East, and deliver emergency parts to designated repair points within 4 hours.
Return and Exchange Process
-The customer is required to submit the test report (such as a third-party appraisal) within the warranty period. After confirmation by Dongfeng, a reissue or refund will be arranged within 5 working days.
Logistics support
Warehouse Layout
-Five major regional accessory centers have been established globally (Southeast Asia, the Middle East, Africa, South America, and Europe) to achieve "next-day delivery" for mainstream accessories (covering customers within the regions).
Emergency Logistics Plan
-Emergency parts can be directly delivered within 48 hours via the "Dongfeng Exclusive Aviation Special Line" (such as engine ECU, brake valves and other key components).
Packaging Optimization
-Use shockproof and moisture-proof packaging (such as honeycomb cartons + pearl cotton), and reinforce fragile parts (such as glass, sensors), keeping the damage rate within 0.5%.
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