How to adjust car brake softness
Recently, car brake system issues have become one of the hot topics of discussion among car owners, especially the phenomenon of "soft brakes", which directly affects driving safety. This article will start from four aspects: the causes of soft brakes, detection methods, adjustment steps and precautions. It will also provide you with practical solutions based on hot discussion data from the entire network within 10 days.
1. The main reason for soft brakes
| Cause classification | Specific performance | Proportion (discussion data of the entire network) |
|---|---|---|
| brake fluid problem | Insufficient oil/deterioration/air intake | 42% |
| Brake pad wear | Insufficient thickness or material degradation | 28% |
| Pipeline failure | Oil leakage or expansion and deformation | 18% |
| other reasons | Master cylinder failure/ABS system abnormality | 12% |
2. Rapid detection methods
1.Pedal stroke test: When the car is cold, apply the brakes three times in succession and observe whether the pedal gradually rises (normally it should remain at the same height).
2.Oil check: Open the engine compartment and check the brake fluid bottle. The fluid level should be between MIN and MAX, and the color should be transparent and slightly yellow.
3.Visual inspection of pipelines: Focus on checking whether there are traces of leakage at the connection between the inner side of the wheel hub and the chassis oil pipe.
3. Detailed explanation of adjustment steps
| steps | Operating Instructions | Tool requirements |
|---|---|---|
| Air exhaust operation | Start exhausting from the wheel cylinder farthest from the master cylinder. Two people are required to cooperate. | 8mm wrench/transparent hose |
| Change brake fluid | DOT4 standard oil, the entire vehicle requires 300-500ml | pressure oil drain |
| Brake pad replacement | Pay attention to distinguish between metal/ceramic materials, and the guide pin needs to be lubricated during installation. | C-type clamp/7mm inner hexagon |
4. Recommendations for popular brake fluid brands in 2023
| brand | Model | Average price of e-commerce platform | User praise rate |
|---|---|---|---|
| BOSCH | DOT4 Plus | ¥58/L | 96.2% |
| Castrol | ReactDOT4 | ¥75/L | 94.7% |
| Shell | Helix DOT4 | ¥62/L | 93.8% |
5. Things to note
1. Brake oil is highly corrosive, so you need to wear goggles and rubber gloves when operating.
2. During the air exhaust process, the liquid level of the oil tank must be kept not lower than the MIN line to prevent secondary air intake.
3. After completing the adjustment, it needs to be tested on a safe road section. It is recommended to perform a spot braking test at a speed of 30km/h.
4. If soft braking still exists after adjustment, you need to contact a professional maintenance agency immediately to check the master cylinder or ABS system.
Hot topics related to the entire network (last 10 days)
#New Energy Vehicle Brake Noise Solution# | #Winter Braking Distance Lengthening Warning# | #New Regulations for Annual Inspection of Modified Braking Systems# | #Intelligent Brake Assist System Accidental Touch Case#
Through the above systematic adjustment plan, more than 80% of brake soft problems can be solved by themselves. It is recommended to replace the brake fluid every 2 years or 40,000 kilometers. During daily maintenance, focus on checking the remaining thickness of the brake pads (not less than 3mm). If there is a problem with the electronic braking system, be sure to use professional diagnostic equipment to read the fault code before performing repairs.
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