When braking, there will be various situations in the brake, such as steering wheel deflection, brake shaking, brake hardening and softening, etc. Today Master Huang talks about the maintenance of the brake.
1. Failure phenomenon: step on the brake pedal, the pedal does not rise, no resistance
Judgment reason: Check whether the brake fluid is missing; whether there is oil leakage at the brake cylinder, pipeline and joint Whether the parts of the pump and pump are damaged;
2. Failure phenomenon: the brake pedal is depressed to the end, the braking effect is not good; continuous braking, the effect is not improved, and the pedal is gradually increased
Judgment reason: gas is mixed in the brake system;
3. Failure phenomenon: Continuously stepping on the brake, the pedal return increases, the braking effect is improved
Judgment reason: the gap between the friction plate and brake drum is too large;
4. Failure phenomenon: Continuously step on the brake, the position of the pedal rises, and there is a sense of sinking
Judgment reason: oil leakage;
5. Failure phenomenon: the position of the pedal is very low; when you step on it again, the position cannot be raised, and it feels hard
Judgment reason: master cylinder is blocked;
6. Failure phenomenon: the pedal height is normal, not soft and not sinking, but the braking effect is not good
Judgment reason: the gap between the friction plate and the brake drum is too large or oily;
7. Failure phenomenon: brake deviation
Judgment reason: if the car is skewed to the left, the right wheel is not braking properly, and vice versa;
8. Failure phenomenon: the car travels for a certain distance, the brake drum (disk) becomes hot
Judge the reason: check the brake master cylinder, brake cylinder or pipeline.
10. Fault phenomenon: the brake fluid level rises slowly
Reason for judgment: Loosen the bleed screw and observe the return of the brake shoe. If the brake shoe returns, the oil pipe should be cleared; if the brake shoe does not return, the brake cylinder should be disassembled and checked.
With the above 10 common failure phenomena, you can pay attention to it when using the car. Treat the symptoms and repair in time. In addition, the master will come and talk to you about how to maintain the brakes?
1. Regularly check and replace brake fluid
The purity of the brake fluid is relatively high. If it is contaminated by impurities or mixed with air, it will seriously affect the braking effect. If the brake fluid is found to be contaminated, the remaining fluid should be emptied and the entire system flushed, and then fill the main cylinder with new fluid. The color of the brake fluid also warns. If the brake fluid is too dark, a malfunction may occur.
2. Check the brake pads and brake discs when stepping on the brake and shaking
Vehicles, especially new cars, shake their bodies when they step on the brakes, often due to deformation of the brake pads or brake discs. If the fault is temporarily eliminated after replacing the brake pads and brake discs; after a month or two, the fault phenomenon reappears, the side hub should be checked, and the deformation of the hub can also cause jitter during braking.
3. Carefully pull the handbrake after washing the car in winter
The principle of the handbrake is to use the force of pulling the handbrake lever to transmit its force to the rear wheel brake system through the brake cable. After washing the car in winter, water may enter the brake line, pull down the handbrake in the state of water intake, and the water will freeze after a long period of parking. At this time, even if the brake lever is pulled back, the brake line will not move . Therefore, after washing the car in winter, the car should be driven for a certain distance, and then parked to pull the handbrake.
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