How to Bleed Car Brakes

Video Transcript

In this clip, we're going to talk about the proper way to remove and replace worn front brake hoses on a 1991 Ford Explorer. In this step, we're going to talk about the proper way to bleed your brakes after you replace your hydraulic hose. Bleeding the brakes requires two people unless you own special tools. I have somebody in the vehicle who is going to help me bleeding the brakes. The method that you use is you want to apply pressure, have the person assisting you hold the pedal, open the bleeder, and close it, then instruct them to come up and down. Then you open it and close it. I'll demonstrate that for you now. Okay, what I'm going to do is instruct my assistant in the car to go ahead and pump the brake pedal. Okay, go ahead and pump the pedal up. Give it about four good pumps. Okay, hold it. Now, you're going to want to keep your face clear because we will get some air and some hydraulic fluid spurting out, right there. Go ahead and close it. Go ahead and come up. Come down and hold it. Come up. Come down and hold it. You can see all the air bubbles we're getting out there. The reason why you have to bleed your brakes is that air is compressible, and hydraulic fluid or liquid is not. If you were to go and step on your brakes with the system full of air, what it will do is compress that air instead of actually applying the caliper. You won't have any brakes. So, you've got to go ahead and get all the air out. The new hose you put on is full of air working with the bleeder and the caliper, you've probably got some air inside of it as well. Go ahead and down and hold it. Once you've got good, solid fluid like that, there's no bubbles coming out, you're done. Go ahead and snug your bleeder up. That is the proper way to bleed your brakes. You're going to go ahead and repeat that procedure for all the other wheels on the vehicle, and make sure to check your master cylinder periodically so you don't pump it empty before you're done.

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