Hello, Charles from American Life 365. In this video, I will share with you on auto brake bleeding. This may be unfamiliar or new to some people. But this is important because it is related to safety.
Before talking about why we need to do it and how to do it, let me first talk about the consequences if we don't do it. If you do not bleed the brake system, your brakes may not be very responsive, resulting in a longer braking distance. In most cases, when you brake, a few inches can make a big difference to avoid accidents.
Why doesn't a brake respond? The main reason is the brake fluid contains air. When air is under hydraulic pressure, air is much more flexible than liquid, just as you can press more air into a wheel. Air has a stronger resilience to pressure. If your brake fluid contains more air, your brakes will become less responsive. You need to get rid of the air contained in the brake fluid.
How does air get into the brake fluid? When brake pads or brake drums are worn or brake service is performed, such as replacing the brake pad or drum or reconnecting the brake pipe. These can result in air intrusion.
The so-called "bleeding" is the process of replacing the brake fluid containing air with fresh pure brake fluid without air.
There are two ways to bleed brakes, one is manual operation by 2 people. One person steps on the brake, and the other open /close the brake piston. This requires leg strength, especially when bleed the last wheel. You also need to know how to brake 80%.
The other way is to use software to trigger the car's bleed operation. Everything is an automatic process. The person only needs to follow the instructions from the software.
What is the order of bleeding? Which wheel is the first to bleed? You want the longest brake pipe to bleed first because the longest pipe has the higher pressure. The shortest brake pipe is the last, because the shortest has the lower pressure. In this order to avoid the air in the brake pipe fluid enter the previous brake pipe which has done bleed already. So the order is RR, RL, FR and FL, assuming you have the driver on the left. Of course, if there are drivers on the right, the order is RL, RR, FL, and FR. The question now is why the brake fluid reservoir is so close to the driver? I leave the answer at the end of the video. Ha ha
Let me show you how to bleed brakes of this car by INPA software.....