The rear wheel hub oil seal (185*210*22), with factory codes 61021991 and 610219912, is a vital component of the SANY concrete mixer truck's rear wheel hub assembly. Its main functions include:

1. Sealing Lubricants:
   The oil seal ensures that lubricants, such as oil or grease, remain inside the wheel hub assembly. This helps to reduce friction and wear on the wheel bearings, ensuring smooth and efficient operation.

2. Preventing Contaminant Ingress:
   It prevents external contaminants such as dirt, dust, water, and mud from entering the wheel hub, which could otherwise cause damage to the bearings and other internal components.

3. Maintaining Wheel Hub Integrity:
   By providing a reliable seal, the oil seal protects the wheel hub assembly, ensuring its proper functionality and performance under various working conditions.

4. Extending Component Lifespan:
   The oil seal reduces wear and tear on the wheel hub and bearings, prolonging their service life and minimizing the risk of premature failures.

5. Reducing Maintenance Costs:
   By maintaining proper sealing and protection, the oil seal lowers the frequency of maintenance and repair needs, contributing to cost savings in vehicle operation.

Changsha Tongchuang Mechanical Co., Ltd. is located in Changsha, Hunan, the capital of China's construction machinery. It is a service-oriented company integrating production, whole machine maintenance and remanufacturing, second-hand equipment, spare parts sales, new material application and export service. It is a member unit of China Construction Machinery Industry Association. Adhering to the business philosophy of "quality for survival, service first", the company has more than 20 years of professional service personnel to provide perfect solutions for customers at home and abroad. In order to achieve efficient and convenient service, the company adopts online and offline operation mode, online communication and offline service. Building the whole life cycle service industry chain of construction machinery, effectively solve the idle equipment of customers, and reduce the use cost of equipment. Checking second-hand equipment service , remanufacturing service and equipment export service have been well received by domestic and foreign users. From the initial parts supplier company to the comprehensive concrete machinery service provider, it is inseparable from the support and help of customers, friends and partners in the industry. At present, the company has Changsha production base, Changsha maintenance and remanufacturing base, Changsha parts storage center and Beijing Doudian parts storage center. We insist on "providing value for customers with products, creating value for customers with services, and sharing value with customers with solutions". We are willing to hand in hand with you to build a dream and create a better future!Company Profile product atlas.pdf