What is the reason for brake pressure loss even after replacing the master cylinder?
1 Answers
Replacing the master cylinder but still experiencing brake pressure loss is due to air remaining in the brake system, which needs to be bled again to restore normal operation. Below are the fault symptoms that may occur when a vehicle's brake master cylinder is damaged: 1. Oil leakage symptoms: Oil leakage may occur at the connection between the brake master cylinder and the vacuum booster or at the limit screws. 2. Incomplete brake pedal travel: The brake pedal is pressed to the floor, but braking performance remains poor or fails; the brake pedal feels soft when pressed. 3. Brake failure or non-return: The vehicle pulls to one side after braking; sudden brake failure occurs; or the brake pedal does not return or returns slowly.