As one of the core components of the vehicle braking system, the installation and construction quality of brake shoes directly affect driving safety. With the continuous growth of global car ownership, the demand for replacement and maintenance of brake shoes is increasing. Whether it is an auto repair shop or an end user, it is crucial to understand and follow the correct construction standards. This article will introduce the construction process and technical points of brake shoes in detail to help practitioners improve the standardization of operations.
1. Preparation before construction
Before replacing the brake shoes, a comprehensive inspection of the vehicle must be carried out. First, confirm whether other components of the brake system (such as brake drums, brake cylinders, brake fluid, etc.) are in normal condition. If the brake drum is found to be excessively worn or cracked, it must be repaired or replaced first. Secondly, use professional tools to return the brake cylinder piston to ensure that the shoe can be installed smoothly. In addition, construction personnel should wear protective gloves and goggles to avoid contact with brake dust or chemicals.
2. Correct installation of brake shoes
During the installation process, the following steps must be strictly followed:
Cleaning the inner wall of the brake drum: Use a special cleaner to remove the dust and oil residue on the old shoe to ensure that the friction surface is clean and free of impurities.
Check the shoe size: The thickness of the new shoe must meet the original factory standard, and the edge must not have burrs or deformation.
Install the locating pin and spring: Correctly embed the shoe into the brake drum to ensure that the locating pin and return spring are firmly installed to avoid abnormal brake noise or failure due to looseness.
Adjust the gap: Control the gap between the shoe and the brake drum by adjusting the nut. The standard value is usually 0.2-0.5 mm. Please refer to the vehicle manual for details.
3. Testing and acceptance after construction
After installation, a braking performance test is required. First, start the vehicle and lightly step on the brake pedal to confirm that there is no abnormal noise or eccentric wear. Then conduct a road test to verify the braking effect under low and medium speed conditions. If the braking distance is found to be too long or the steering wheel shakes, the shoe installation needs to be rechecked. In addition, it is recommended to avoid high-speed driving within 24 hours after construction to ensure that the brake system is fully run-in.
IV. The industry significance of construction standards
Standardized brake shoe construction can not only extend the service life of components, but also significantly reduce the risk of traffic accidents. With the improvement of international market requirements for automobile safety, mastering standardized construction processes has become the basic competitiveness of the maintenance industry. Whether it is export products or local services, strict compliance with technical specifications is the core of winning customer trust.
Through the above steps, the replacement of brake shoes can achieve efficient and safe standards. Practitioners should receive technical training regularly and update their knowledge in a timely manner to adapt to the ever-changing industry requirements.
