Press the brake pedal directly to the bottom. Continue to press a few times, and the brake pedal will feel a little stiff. There is some sinking phenomenon. Continue to press the brake and start the
New Car engine, and the pedal will sink a little. This is the result of the power vacuum booster, which is a normal phenomenon. The oil quality is poor and deteriorated.
There is air in the pipeline. The distance between the brake shoe and the brake drum is too large. The master brake pump is deflated; the vacuum booster is damaged or the vacuum source of the vacuum booster is blocked. I carefully check and work on these aspects. The normal color of the brake fluid of a New Car should be a light yellow transparent liquid.
So I decided to replace all the brake fluid first, and then check the pipeline leakage after replacement. After confirmation, the feeling of stepping on the brake pedal is much better than before.
There is also an empty gear to release the handbrake, and the
Fuel Car can turn the rear wheel, and the tire can turn more than ten times. The brake clearance is too large, remove the tire brake drum, and the clearance between the brake shoes and the brake drum on both sides jumps to the standard technical conditions. It is normal to have a little force when turning the brake drum by hand. Install the brake drum.
It is better to step on the brake pedal of a Fuel Car. The pedal height has reached the requirement. However, the test drive found that the braking force was insufficient and there were no brake marks on the floor.
At this time, I began to suspect that the master brake cylinder had a slight leak. When I braked again continuously and checked it with the compression method, the pedal with signs of leakage did not sink.
