What are the reasons for the failure of the brake pump in an electric four-wheel vehicle?

[WalkerLynn]

The following are the specific reasons for the failure and corresponding measures: Brake master cylinder failure: The main reason is that air entering the brake master cylinder causes the brake slave cylinder to fail to work or work inefficiently. Measures: First, check whether the brake oil pipes (flexible oil pipes and copper oil pipes) have any oil leakage. If there is oil leakage, tighten the leaking connections after inspection. Poor quality of oil-resistant pipes: If there is no oil leakage, the oil pipe connected to the oil reservoir may be of poor quality. It is recommended to replace it with a dedicated oil-resistant pipe. Poor quality of brake fluid: It is possible that the poor quality of the brake fluid corrodes the oil pipes and the brake master cylinder, causing air to enter the brake system. In this case, replace the master cylinder, oil-resistant pipes, and brake fluid (generally DOT3 type) and re-bleed the air. Sealing performance of the master cylinder: Check whether the sealing performance of the master cylinder is good.