Why is the brake of the SouEast DX7 so hard?
2 Answers
The reasons for the hard brake in the SouEast DX7 include stepping on the brake before turning off the engine and brake booster pump failure. Stepping on the brake before turning off the engine: The car's braking system functions at its best when the engine is running, and the brake booster pump is the key component that amplifies the force applied to the brake pedal. When the engine is off, the brake booster pump loses its function. Typically, stepping on the brake pedal three times will deplete the remaining vacuum force, making the brake feel hard due to the lack of assistance from the brake booster pump. Solution: In this case, simply restart the engine and try pressing the brake pedal firmly again. Once the engine is running, the brake booster pump will resume functioning, and the brake pedal will return to normal. Brake booster pump failure: If the car's brake booster pump is leaking or malfunctioning, and you haven't stepped on the brake pedal after turning off the engine, or if you find the brake pedal hard to press while driving, it is likely due to a faulty brake booster pump, a vacuum tube leak, or blockage. Solution: If this issue is noticed before driving, it is advisable not to proceed and to have the car inspected at a repair shop immediately. If the problem arises while driving, remain calm, reduce speed, and come to a stop. Try pressing the brake pedal multiple times to see if braking can be restored. Applying more force usually helps generate braking power.
My Soueast DX7's brake pedal has become extremely stiff recently, requiring a lot of force to press down. After checking some information, I found there could be several reasons: The most common issue is air leakage or failure in the vacuum booster pump, which is responsible for making the brake pedal easy to press - if it's broken, the entire assembly needs replacement. Another possibility is if the vacuum hose in the engine compartment connecting to the intake manifold is cracked or if its sealing ring has aged, causing air leakage and loss of power assistance. Additionally, if the brake fluid has deteriorated or air has entered the pipelines, the hydraulic system will become stiff. A more troublesome issue could be the brake master cylinder piston sticking, which requires disassembly for inspection. Honestly, such brake problems shouldn't be delayed. I recommend going to a repair shop immediately to check the vacuum pressure with a diagnostic computer - don't wait until something serious happens to regret it.
