

The Sitrak Chassis Electrical Components kit is an essential assembly of high-quality electrical and pneumatic control parts designed to ensure the reliable and safe operation of your heavy-duty truck’s chassis systems. As a meticulously curated part of the comprehensive Sinotruk Sitrak parts range, this collection includes critical items such as solenoid valves, sensors, switches, and the iconic warning horn. These components work in unison to manage air pressure, provide audible signals, and secure wiring, forming the nervous system of the vehicle’s undercarriage. The reliability of these Sitrak Chassis Electrical Components directly impacts vehicle safety, compliance, and operational uptime.
This assembly is a focused collection of vital Sitrak Chassis Electrical Components and electro-pneumatic components mounted on the truck’s chassis frame. Its primary role is to control and monitor the vehicle’s pneumatic (air) systems, which are crucial for functions like braking and suspension. Key elements include solenoid valves that act as electronically controlled switches for air lines, and electronic pressure sensors that provide real-time data to the vehicle’s control units. These components ensure that air pressure is accurately managed and distributed for safe operation.
A central auditory component is the disc-type electric horn, a dual-wire device that provides a loud, clear warning signal. The kit also includes pneumatic warning light switches that illuminate dashboard indicators when air pressure in a specific circuit drops below a safe threshold. These switches are critical safety devices, alerting the driver to potential brake system failures. The assembly emphasizes both control (via valves) and feedback (via sensors and switches), creating a closed-loop system for chassis pneumatics.
Completing the kit is a selection of hardware and sealing elements essential for proper installation and leak-free operation. This includes a wiring harness bracket for secure routing, specialized flange bolts and nuts with locking features for vibration resistance, and various O-rings and sealing washers. Transition nuts allow for connection between different thread sizes in the air system. Lead seals and wire are also provided for tamper-proofing certain connections, which is often required for regulatory compliance, especially in components related to braking systems.
Designed as a cohesive package, these Sitrak Chassis Electrical Components are engineered to work together seamlessly on Sinotruk vehicle platforms. They are built to withstand the harsh environment under the chassis, including exposure to moisture, road debris, temperature extremes, and constant vibration. Using this complete set of genuine components ensures system integrity, simplifies the sourcing process for repairs or assembly line production, and guarantees that all parts meet the original equipment manufacturer’s specifications for performance and durability.
| No. | Part Number | Part Name English | Quantity |
|---|---|---|---|
| 1 | 752W25441-0007 | Right Side Wiring Harness Fixing Bracket | 1 |
| 2 | 811W52160-6115 | Solenoid Valve | 2 |
| 3 | 811W52160-6117 | Solenoid Valve | 1 |
| 4 | WG9925710001 | Disc Type Electric Horn (Dual Wire) | 1 |
| 5 | WG9727710002 | Electronic Pneumatic Pressure Sensor | 2 |
| 6 | Q1811435TF2 | Hex Flange Face Serrated Bolt | 2 |
| 7 | MQ6112512005 | Flange Hex Nut with Mechanical Locking | 2 |
| 8 | Q150B08175 | Hex Head Bolt (Thread Effective Length >35mm) | 2 |
| 9 | ZQ340B08 | Type 1 Hex Nut M8 | 2 |
| 10 | 1406 070015 | Sealing Ring / O-ring | 2 |
| 11 | WG9000360292 | Sealing Ring / O-ring | 2 |
| 12 | WG9000361028 | Transition Nut M22X1.5/M16X1.5 | 2 |
| 13 | WG9100710004 | Pneumatic Warning Light Switch | 2 |
| 14 | WG9725580086 | Lead Seal | 1 |
| 15 | 190000810930 | Lead Seal Wire | 40 |
Our chassis components are critical for vehicle safety. The pneumatic warning switches provide immediate alerts for brake circuit failures. The inclusion of lead seals allows for official tamper-proofing, which is often mandatory for braking system components to pass rigorous annual inspections and comply with transport regulations. Using genuine, reliable parts in these safety-critical circuits minimizes the risk of undetected faults that could lead to accidents, protecting your drivers, cargo, and public safety.
Every component in this kit is engineered for the harsh under-chassis environment. Solenoid valves feature robust coils and seals resistant to temperature cycling and moisture. Electronic pressure sensors provide accurate, long-term data without drift. The hardware, including serrated flange bolts and locking nuts, is specifically chosen to resist vibration-induced loosening. This focus on durability translates to fewer roadside failures, reduced maintenance intervals, and higher overall vehicle availability for your fleet.
Sourcing individual Sitrak Chassis Electrical Components parts can be time-consuming and risky. Our kit provides a complete solution with guaranteed compatibility. Every part number matches the original Sinotruk specifications, ensuring correct thread sizes, Sitrak Chassis Electrical Components connectors, voltage ratings, and mounting points. The inclusion of often-overlooked but vital items like sealing rings, transition nuts, and ample lead seal wire means you have everything needed for a complete, professional repair or assembly in one package, saving valuable time and eliminating guesswork.
By choosing genuine Sitrak Chassis Electrical Components, you invest in OEM quality that is tested and validated on Sinotruk vehicles. This protects your vehicle’s warranty and ensures optimal performance of integrated systems like ABS or EBS, which rely on accurate sensor signals. Furthermore, you gain access to accurate technical data and support channels. This is invaluable for correct installation and troubleshooting, ensuring the job is done right the first time and maximizing the lifespan of the components.
Solenoid Valves (811W52160-6115 & 6117): These are electromechanical devices that control the flow of compressed air in the chassis system. When an Sitrak Chassis Electrical Components current is applied to the coil, it creates a magnetic field that moves a plunger, opening or closing a port. They are used to actuate components like air-operated differential locks, suspension leveling valves, or exhaust brakes. The different part numbers indicate variations in orifice size, voltage (12V/24V), or function (normally open/closed).
Electronic Pneumatic Pressure Sensor (WG9727710002): This is a transducer that converts air pressure in a reservoir or line into a proportional Sitrak Chassis Electrical Components signal (usually voltage or PWM). This signal is fed to the dashboard gauge or a central ECU for monitoring. Modern electronic sensors are far more accurate and reliable than old mechanical diaphragm switches, providing precise data for vehicle management systems.
Pneumatic Warning Light Switch (WG9100710004): This is a simple but vital safety device. It contains a diaphragm exposed to air pressure. If the pressure drops below a preset threshold (e.g., 65 psi), the diaphragm moves, closing an electrical circuit that illuminates a red warning light on the dashboard. This gives the driver an immediate visual alert of a potential brake system air leak or compressor failure.
These components are typically replaced during routine maintenance or after a fault diagnosis. Signs for replacement include: inoperative or weak electric horn; dashboard air pressure warning light stuck on or off; diagnosed faulty solenoid valve causing non-engagement of a differential lock or exhaust brake; inaccurate air pressure gauge readings pointing to a faulty sensor; or visible air leaks from switch/valve seals. The wiring harness bracket may need replacement if damaged due to impact or corrosion. Using this complete kit is ideal for refurbishing a vehicle after an accident or during a major service.
Installation: Always depressurize the air system before replacing any component. Use thread sealant (where specified, not on O-ring fittings) and ensure all connections are tight to prevent leaks. Route wiring securely using the provided bracket to avoid chafing. Connect electrical plugs firmly, ensuring they are locked. Maintenance: Periodically inspect all chassis electrical components for physical damage, corrosion on connectors, and signs of air leaks. Check the horn’s sound output. During routine brake system checks, verify the function of the warning light switches by bleeding air from a reservoir to trigger the light. Clean electrical connectors with contact cleaner to ensure good conductivity.
Every item in the Sitrak Chassis Electrical Components kit is sourced directly from approved Sinotruk suppliers or manufactured to original blueprints. They undergo the same quality control procedures as parts used on the assembly line. This ensures material integrity, dimensional accuracy, and performance specification compliance. When you purchase this kit, you are not just buying a collection of parts; you are investing in the verified quality, system compatibility, and peace of mind that comes with genuine OEM components. This commitment to quality helps safeguard the performance, safety, and resale value of your Sinotruk vehicle.
This product catalog provides detailed information on the genuine Sitrak Chassis Electrical Components kit. Part numbers, specifications, and kit composition are subject to change based on continuous product improvement and specific vehicle model requirements. For the most current and model-specific information, please consult the latest Sinotruk parts database or contact an authorized parts distributor.
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