How to Replace the Brake Pads in the Car?(3)

Method 3: extract the brake fluid from the brake

 

Remove the cover of the brake master cylinder.

 

The brake fluid will be full of dust and some impurities from the air and car parts. It also absorbs moisture in the air, which is dangerous to reduce its boiling point. Therefore, you need to drain the brake fluid from the car before replacing the brake pads and calipers, but you should also make sure that the brake fluid cover is open before pumping. Find the filling line and draw more if necessary. Make sure the cover is open during the pumping of brake fluid.

 

The reason for increasing the brake fluid is that you draw the brake fluid from the caliper. The amount of brake fluid should be below the filling line, and you also need to supply the master cylinder continuously.

 

 

Decide the sequence of extracting brake fluid.

 

Generally speaking, you want to draw the brake fluid at the farthest place from the master cylinder first, so you need to find out the instructions before this step. All models of cars are more or less different in this regard. If you don't have instructions, you can also go to the auto parts store to ask.

 

Select a suitable plastic hose and insert it into the outlet of the brake fluid.

 

A cheap aquarium hose is very suitable. Put the other end of the hose into a vial or basin to draw out the liquid. To prevent the liquid from flowing back into the car, you should lift the bottle higher than the caliper and maintain your center of gravity.

 

Get a helper to help you step on the brake.

 

Turn off the engine and ask your friend to help you step on the brake until you feel resistance in the brake. When they tell you loudly that they feel resistance, you should gently loosen the air screw and then tell them to release the brake.

 

At this time, the brake fluid should be drained into the bottle or basin along with the hose. Screw back the bleed screw when your helper gets off the car.

 

Repeat this process until there are no bubbles in the hose.

 

Double-check to make sure there are no bubbles.

 

If the brake fluid flows in the master cylinder when the brake pedal is pressed, there are still bubbles in the system. Draw the brake fluid before you proceed to the next step.

 

Tips

 

If the wheel is worn or uneven, be sure to check it. These two conditions may cause brake noise. When such a situation is about to happen, the tire can be reground and leveled as long as the thickness of the wheel is greater than the minimum thickness.

 

If you put the rear brake in the parking brake system, take it out and adjust its position.

 

Turn the steering wheel of the car to ensure that the front wheels are facing outward after removing the front tires, which will make it easier to adjust the front wheel calipers. In this process, we must ensure that the support of the jack is not in the way.

 

Warning

 

Don't take the brake line out of the caliper, because it will make a mess by allowing air to enter the brake line.

 

Be sure to use the support and support of the jack to support the wheel to prevent the wheel from sliding. Don't rely entirely on jacks.

 

Do not apply lubricant to the brake pads. If this happens, the brake pads will have no friction, and the brake pads will be scrapped.

 

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