What Are the Symptoms of Air Leakage in the Brake Air Pump?

1 Answers
VonHeidi
07/30/25 3:49am
Symptoms of air leakage in the brake air pump: poor braking performance or no braking effect; visible oil leakage at the external connections of the vacuum pump from the exterior; slow or non-returning brake pedal. Below is an introduction to brake air pressure: 1. Influencing factors: Insufficient compressed air storage in the vehicle's air reservoir leads to inadequate air supply from the brake valve; air leakage in the brake valve pipeline or blockage in the air circuit can result in insufficient compressed air pressure generated by the braking system during braking. 2. Air pressure principle: During air pressure braking, the driver presses the brake pedal, opening the brake control valve and connecting the passage from the air reservoir to the brake chamber. This allows the compressed air in the air reservoir to pass through the brake control valve into the brake chamber. Sufficient air pressure pushes the brake chamber push rod outward, driving the brake adjustment arm to rotate the cam. The rotation of the cam causes the brake shoes to expand and press against the brake drum, thereby braking the wheel.
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