Bleeding brakes can sometimes be an afterthought after replacing the brake pads and rotors. However, it is a necessity whenever any part of the hydraulic system is disconnected. So when the hydraulic and brake system is worked on, there is a good chance that air will get into the system’s lines, causing the pushing down of the brake pedal to have a spongy feel.
In a nutshell, this process is done by bleeding the hydraulic system. Once it has been correctly connected, that spongy pedal feel will go away. The spongy feel goes away because the air has been pushed out of the systems. More specifically the brake cylinders and lines. However, there is a step by step process to achieving brake bleeding success. Let’s start with a few tips.
First, take these into account prior to starting the process:
So let’s begin with the process of bleeding the brakes:
Step 1: Start with the master cylinder fill cap by cleaning around it and removing it. Now fill it until the brake fluid is a 1/4 inch from the top of the reservoir.
Step 2: Now move to cleaning the bleeder screws for each wheel. The screws are positioned at the inside of the brake backing plate, on the front brake calipers and on the back of the wheel cylinders.
Step 3: Go to one of the rear wheels and start the bleeding. A usable length of rubber hose should be attached to the bleeder screw and the other end put into a clear container. Note: Keep in mind to maintain fluid in the master reservoir brake fluid is toxic and a health hazard.
Step 4: Carefully open the screw valve by turning it by 1/2 or 3/4 twist.
Step 5: Now get your helper to gently press the brake pedal down. Then close the valve and have the brake pedal slowly return to the starting position. Repeat the opening, depressing of the pedal, and closing the valve until no more air bubbles appear in the tubing end.
Step 6: Once the bubbles are gone you can then remove the hose and close the valve.
Step 7: Make sure to refill the master cylinder each time a wheel is completed.
Step 8: Repeat the following on each wheel and end with the one closest to the master cylinder. Note: End the entire process by giving the master reservoir a final fill up.
Brake bleeding takes patience. Follow the process correctly until the air has been fully expelled from the system. It is not a difficult process, but it is important to do in order for the hydraulic and brake system to work correctly.