D1400 Brake Pads

The reason why the front wheel brake pads wear faster

Braking is something that every car owner will do when driving. Generally, we will find that the front brake pads of the vehicle wear faster than the rear brake pads. What is the reason for this? In fact, the speed of wear of the brake pads and the frequency of its use and The size of the brake pads is related to the force.

The front and rear brake pads of a car are used at almost the same frequency, but the front and rear brake pads are different or the braking force applied to the wheels is different, because the braking force is proportional to the axle weight. Most of the current cars are front-mounted front-wheel vehicles. The front brake pads are worn more quickly because the brake force is greater than that of the rear brake pads because the front bearing weight is much larger than the rear bearing. Generally, the service life of front wheel brake pads is 30,000-50,000 kilometers.

Brake pad test method

The importance of the brake pads of a car to the vehicle is self-evident. When it comes to the test of the brake pads of a car, the first thing to say is the mechanical equipment and standards for the test. At present, the national standard for the detection of the friction coefficient of the brake pad is realized by a constant speed test machine. The constant speed test machine detects the friction coefficient of the brake pad instead of taking a complete brake pad for inspection. Instead, it cuts two 25m*25mm small squares from the brake pad friction block, then smoothes it and puts it on the testing machine. The specified location.

The rotational speed of the tester disk is constant, the ambient temperature is constant, the pressure applied to the friction block is constant, and the sample is a small friction block rather than a complete brake pad. When testing for temperature rise, the disk rotates at a constant speed of 5000 rpm at each temperature point. The test opportunity records the average friction coefficient at each temperature point. When the temperature is detected, the test machine disc rotates at a constant speed of 7500 rpm, and the test machine also records each The average coefficient of friction at a temperature point.

Brake pad replacement needs attention

The brake pads of the car are consumables, and we need to replace them after using a certain amount of time or mileage. If it is a disc brake, we can directly observe the thickness of the brake pad, and the drum brake is more troublesome. The brake shoe needs to be removed to see the brake pad. Regardless of the type of brake, it needs to be replaced in time when it is worn to a very thin condition.

When replacing the brake pads, we must first distinguish the inner and outer pieces of the brake pads, and make the discs fit properly when installing; then attach the accessories to tighten the caliper body; then reset the replaced tires. In addition, we also check whether the tread and edge wear is normal. The correct way is to use the left and right wheels regularly, which will help to extend the service life of the tire. Secondly, it is necessary to check the brake fluid. The brake fluid should be replaced and added regularly. At the same time, it should be ensured that the grade of the brake fluid used is the same as the grade of the original brake fluid. This will help to remove the sludge dirt in the brake line. The brakes are more sensitive.