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The WEICHAI WP12 Fan And Hub Group is a precision-engineered cooling assembly that includes the fan bracket, viscous clutch, fan hub, and fan blades, forming the complete front cooling system for WP12 heavy-duty diesel engines. As genuine WEICHAI Engine Parts, this fan and hub group is part of an automatic tensioning front wheel train that achieves a belt service life of 10,000 hours under normal operating conditions. The WEICHAI WP12 Fan And Hub Group ensures optimal engine cooling performance across all WP12 variants from 336 HP to 550 HP.
The WEICHAI WP12 Fan And Hub Group is a complete cooling assembly that includes the fan bracket, viscous clutch unit, fan hub, and hyperboloid fan blades. The fan bracket (Part No. 612630060238) serves as the structural backbone, securing the entire assembly to the engine block while supporting the weight of the fan and viscous clutch. The bracket is manufactured from high-strength cast iron using precision sand-casting techniques, providing excellent rigidity and dimensional stability under continuous thermal cycling from -35°C to 50°C.
The viscous clutch unit in the WEICHAI WP12 Fan And Hub Group (Part No. 612630060538) is a temperature-regulated coupling that dynamically adjusts fan speed based on engine operating temperature. When the engine is cold, the clutch disengages, allowing the fan to rotate at a lower speed (400-600 RPM), reducing parasitic drag and improving fuel efficiency. As coolant temperature rises, the visco-elastic coupling engages, increasing fan speed to draw more air through the radiator, providing maximum cooling when needed most. This electro-viscous clutch design achieves approximately 20% improved energy efficiency compared to conventional fixed-speed fans.
The fan hub is the rotating interface that connects the viscous clutch to the fan blades. Precision-machined from high-grade aluminum alloy, the hub incorporates a sealed bearing that requires no maintenance and provides thousands of hours of trouble-free service. The hyperboloid fan blades are engineered with an advanced aerodynamic profile that delivers large air volume while minimizing power consumption and noise. This hyperboloid fan design features low noise characteristics and meets the ambient temperature limit of 46°C for vehicle cooling applications, making it ideal for both highway trucks and off-highway equipment.
Applications for the WEICHAI WP12 Fan And Hub Group include Shacman X3000/F3000/X5000, Sinotruk HOWO A7/T7H, Beiben trucks, Oman trucks, Hongyan vehicles, JAC trucks, CAMC vehicles, Yutong buses, Kinglong buses, and SDLG wheel loaders. The group is compatible with WP12 power outputs from 336 HP to 550 HP across Euro III, Euro IV, Euro V, and China VI emission standards. The WP12 engine platform features an automatic tensioning front wheel train, with an optional 272mm height bracket fan configuration for specific cooling system requirements. Every genuine WEICHAI WP12 Fan And Hub Group carries OEM part numbers including 612630060238 (fan bracket), 612630060538 (viscous clutch fan assembly), 1000986905, and 1000713056 for full traceability.
Counterfeit fan and hub groups often use inferior cast iron with porosity defects, inadequate heat treatment, and substandard bearing quality, leading to premature cracking, fan wobble, belt misalignment, and catastrophic cooling system failure. Always source genuine WEICHAI WP12 Fan And Hub Group components from authorized distributors to ensure proper fitment, reliable cooling performance, and long-term durability in the harsh engine environment. The WP12 engine platform has undergone over 45,000 hours of cumulative bench testing and over 50 million kilometers of road testing, proving the reliability of every cooling system component.
| NO. | Part NO | Description |
|---|---|---|
| 1 | 612630060238 | Fan Bracket / Fan Support Bracket (WP12/WP13, Cast Iron, 272mm Height) |
| 2 | 612630060538 | Viscous Clutch Fan Assembly / Visco Clutch (WP12, Aluminum Alloy, Electronic Temperature Sensing) |
| 3 | 1000986905 | Fan Bracket Assembly (WP12, Complete with Bearing Housing) |
| 4 | 1000713056 | Fan Bracket Assembly (WP12, Standard Duty, OEM Replacement) |
| 5 | 612600100181 | Fan Bracket Assembly (WP12, with Integrated Belt Tensioner Mount) |
| 6 | 612600062253 | Viscous Fan Clutch Assembly (WP10/WP12/WP13 Heavy Duty) |
| 7 | 612600062440 | Fan Blade / Fan Impeller (WP12, Hyperboloid Profile) |
| 8 | 1000750540 | Fan Drive Shaft / Fan Flange (WP12, Fan Shaft Assembly) |
| 9 | 1002304092 | Fan Connection Plate / Fan Hub (WP12, Rotating Interface) |
| 10 | 612600060123 | Fan Component Assembly (WD615/WP12/WP7/WP10, Fan and Hub Set) |
The table above lists common service parts for the WEICHAI WP12 Fan And Hub Group. When replacing components, the fan bracket (612630060238) and viscous clutch fan assembly (612630060538) are the most frequently ordered items. The hyperboloid fan blades (612600062440) feature large air volume and low noise characteristics. The front wheel train features automatic belt tensioning, achieving a belt life of 10,000 hours under normal operating conditions, and an optional 272mm height bracket fan is available for specific cooling system configurations.
The fan bracket in our WEICHAI WP12 Fan And Hub Group is manufactured from high-strength cast iron using precision sand-casting techniques, providing excellent rigidity, fatigue resistance, and dimensional stability under continuous thermal cycling from -35°C to 50°C. The bracket includes a precision-machined bearing housing that supports the fan hub and viscous clutch.
The viscous clutch unit (612630060538) uses electro-viscous coupling technology with integrated electronic temperature sensing, automatically adjusting fan speed based on real-time engine temperature. This design reduces parasitic drag by up to 20% during cold operation while providing maximum cooling when needed.
The hyperboloid fan blades are engineered with an advanced aerodynamic profile that delivers large air volume while minimizing power consumption and noise. This design meets the ambient temperature limit of 46°C for vehicle cooling applications, ensuring reliable operation even in extreme heat conditions.
No modifications required for WP12 engines in Shacman, Sinotruk, Beiben, Hongyan, JAC, CAMC, Yutong, Kinglong, and SDLG applications. Bolt-on replacement with factory-specified torque values. Available for both standard fan configurations and optional 272mm height bracket fan systems.
Each WEICHAI WP12 Fan And Hub Group component undergoes rigorous quality control including dimensional inspection, casting integrity testing, bearing smoothness verification, and clutch calibration. No porosity defects, casting cracks, or machining errors are tolerated. IATF 16949 certified quality.
Worldwide shipping from regional warehouses. Free fan and hub group installation torque charts (bracket bolts: 24-30 N·m), clutch operation verification procedures, and troubleshooting guides provided with each order. Volume discounts available for fleet customers and engine rebuilders.
Unlike aftermarket fan groups that use inferior cast iron with porosity defects and substandard viscous clutches, our genuine WEICHAI WP12 Fan And Hub Group is manufactured to original equipment specifications with documented quality control. The viscous clutch unit (612630060538) is constructed from corrosion-resistant aluminum alloy, reducing weight by up to 30% compared to traditional cast iron clutches while providing robust performance in harsh automotive environments. The clutch’s electronically controlled visco-elastic coupling ensures precise temperature regulation and reliable performance across diverse operating conditions, from city traffic to long-haul routes.
The hyperboloid fan blades (612600062440) are designed using computational fluid dynamics (CFD) modeling to optimize airflow while minimizing power consumption. The fan’s advanced blade profile generates high static pressure, ensuring adequate cooling airflow even through clogged radiators or intercoolers. The fan hub (1002304092) features a sealed, pre-lubricated bearing that requires no maintenance and is engineered for a service life exceeding 10,000 operating hours. The fan drive shaft (1000750540) is precision-machined from alloy steel with induction- hardened bearing journals for exceptional wear resistance.
Technical support includes fan and hub group installation procedures: clean mounting surfaces on engine block, inspect bracket for casting defects, verify viscous clutch operation (should engage at approximately 85-95°C coolant temperature), align bracket with locating dowels, torque bracket mounting bolts to 24-30 N·m in a symmetrical cross-tightening sequence, install fan hub and blades, and verify fan rotation without interference. Troubleshooting guides for symptoms like fan wobble (worn bearing or loose bolts), inadequate cooling (failed viscous clutch or incorrect fan blade orientation), and unusual noise (bearing wear or blade damage) are provided.
For fleets, sample testing is available. Order one WEICHAI WP12 Fan And Hub Group for trial; volume pricing applies. Many customers report over 800,000 km trouble-free cooling system operation after replacing worn or failed original components with our genuine fan and hub groups. We stock both standard bracket configurations and the optional 272mm height bracket fan for specific cooling system requirements, and we provide cross-reference support for part number verification based on your engine serial number and chassis application.
Also monitor the engine temperature gauge during operation. If the engine consistently runs hot, inspect the WEICHAI WP12 Fan And Hub Group for proper viscous clutch operation. A failed clutch that never engages will cause rapid overheating under load. Conversely, if the engine takes too long to warm up or runs cold, the viscous clutch may be seized in the engaged position, causing excessive fan noise and reduced fuel economy.
For severe-duty applications (mining, construction, heavy haul, marine), reduce inspection intervals to every 25,000 km (15,000 miles) or 250 operating hours. High ambient temperatures and frequent stop-start cycles accelerate viscous clutch wear and bearing degradation. Marine applications require additional corrosion checks— saltwater environments can accelerate galvanic corrosion of the fan bracket and hub. Consider applying anti-corrosion coating to bracket exteriors in marine applications.
When installing a new WEICHAI WP12 Fan And Hub Group, ensure that all mounting surfaces on the engine block are clean and free of old gasket material, corrosion, and debris. Align the fan bracket with the locating dowel pins before tightening bolts. Install the viscous clutch with new mounting bolts torqued to factory specifications. After installation, run the engine and inspect for fan wobble, unusual noise, and proper clutch engagement as the engine warms up. Verify that the fan blades do not contact the fan shroud or any other components through the entire range of engine movement.
Maintain a logbook of all cooling system maintenance: dates of fan and hub group inspections, bearing noise observations, viscous clutch engagement verification, bolt torque readings, belt replacements, and any abnormal findings. For fleet operators, tracking fan bearing noise progression and coolant temperature trends is a powerful predictive maintenance tool—bearing noise typically develops gradually over thousands of kilometers, providing ample warning before catastrophic failure occurs.
In summary, the WEICHAI WP12 Fan And Hub Group features high-strength cast iron bracket construction, variable-speed viscous clutch technology, and hyperboloid fan blades with low noise and high airflow. Whether you are rebuilding a Shacman X3000, Sinotruk HOWO, Beiben truck, Yutong bus, SDLG wheel loader, marine vessel, or generator set, choosing a genuine fan and hub group directly impacts cooling system reliability, fan longevity, and engine protection against overheating.
For workshops performing in-frame overhauls, we recommend ordering the WEICHAI WP12 Fan And Hub Group as a complete kit including fan bracket (612630060238), viscous clutch fan assembly (612630060538), fan blades (612600062440), fan hub (1002304092), and fan drive shaft (1000750540). This approach eliminates hidden failures and gives your customer a worry-free warranty period. The fan bracket is pre-inspected for casting integrity and dimensional accuracy, while the viscous clutch is calibrated for proper engagement temperature before shipment.
Our inventory includes both standard fan bracket configurations and the optional 272mm height bracket fan for specific cooling system requirements. The standard WEICHAI WP12 Fan And Hub Group provides excellent service life for long-haul trucking, while the 272mm height bracket fan variant is designed for applications requiring elevated fan positioning. We provide cross-reference support for part number verification — please provide your engine serial number for accurate matching.
We provide after-sales documentation including dimensional inspection reports, casting integrity certifications, material certificates (cast iron and aluminum alloy composition), viscous clutch calibration data, bearing specifications, and installation torque specifications upon request. Every WEICHAI WP12 Fan And Hub Group component is packaged in protective foam-lined boxes to prevent damage during shipping. Bulk orders receive custom palletizing and export documentation assistance.
All specifications based on original WEICHAI WP12 engine data. Cross-check part numbers with engine serial number and cooling system configuration. The WEICHAI WP12 Fan And Hub Group includes OEM references 612630060238 (fan bracket), 612630060538 (viscous clutch fan assembly), 1000986905, 1000713056, and 612600060123. Always torque bracket mounting bolts to 24-30 N·m in a cross-tightening sequence, and verify viscous clutch engagement during engine warm-up.
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If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
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