What are the reasons for no braking when pressing the air brake hard?
3 Answers
The reasons for no braking when pressing the air brake hard are as follows: 1. Lack of brake fluid: Leakage in the brake wheel cylinder, pipelines, and joints, potential damage to the master cylinder or wheel cylinder. 2. Presence of air in the brake system. 3. Excessive gap between the friction pads and the brake drum. 4. Overheating of the brake disc. Precautions for air pressure are as follows: 1. After starting the vehicle, the onboard air pump must be used. 2. Do not blindly choose to use an inflator pump; replace it immediately if there are issues, and check the tire pressure immediately if abnormal. 3. Avoid prolonged use of the inflator pump to prevent overheating and damage.
When the air brakes don't work even with heavy pressing, I'm really concerned—it might be related to insufficient air pressure. While driving heavy trucks, I've encountered similar issues, usually caused by a faulty air compressor or air leaks in the lines, preventing pressure buildup. The system might also have a clogged brake valve or air reservoir leakage. If there's not enough air in the storage tank, no amount of pressing will help. I'd first check the pressure gauge to see if the reading is normal; if it's below the standard, I'd need to locate the leak. Regular maintenance is crucial, like cleaning the air filter periodically and checking the tightness of connections. If the brakes suddenly fail while parked, slow down gradually and pull over—don't force it. Safety comes first.
From a maintenance perspective, if the air brake doesn't respond when heavily pressed, it's mostly due to air circuit failure. I often encounter such cases in repair shops. Possible causes include malfunctioning air compressors failing to generate sufficient pressure, or brake valve leaks causing air pressure loss. Additionally, check if the brake cylinder is cracked or if there's any blockage in the pipelines. In emergencies, try using the hand brake for auxiliary braking. Preventive measures include weekly inspection of the air reservoir's drain valve and handling accumulated water to prevent component rust.
