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Brake discs are made of very hard steel. Their pads are made of friction materials.
Hardness in the brake pedal can because by low brake fluid. Air in the brake lines can also cause the pedal to push hard.
Brake discs are made of very hard steel. Their pads are made of friction materials.
Usually when a brake pedal feels more stiff than usual, there is a vacuum leak. The brake lines probably should be bled.
A hard brake pedal can be caused by several different factors. It can be as simple as the brake pedal getting caught on something to the power brake booster being bad. You could also have a brake pad or shoe that is sticking, causing the brake fluid to boil. When brake fluid boils, it expands and can cause the hard brake pedal that you feel. A brake pedal that is hard to press can also be caused by a build-up of water in the brake line. The water in the brake line lowers the boiling point of the brake fluid. A hard brake pedal can also be the result of a restriction in the brake line, such as a bent brake line or foreign material in the brake fluid. The most common cause of a hard brake pedal is the sticking brake pad or shoe, causing the brake fluid to boil. Tracking down what is causing the hard brake pedal can be frustrating, to say the least. Take the vehicle for a drive and when you come back, feel your brake lines near the wheels. Caution: The line may be very hot! If one is extremely hot, you may have just found the culprit causing the hard brake pedal.
Air in a brake line or a bad master cylinder could cause this. Bleed the brake lines if you have been working on any brake cylinder. If this happened without any warning, the master brake cylinder is probably the cause and should be replaced.
sounds like you have a leak in your Brake Boost Controler, you should also check to see if there is any leaks in the vacuum lines that connect the engine to the brake booster.
To find where a brake line is leaking, have a friend push the brake pedal and look for the dripping fluid. Hard brake lines are not "repairable". They must be replaced. To replace one, you must obtain from the parts store an appropriately sized steel line (nothing other than steel). Using the proper tools, it must be bent to shape and flared on the ends. Sadly, no one makes pre-fab brake lines for modern cars (affordably). If you want to tackle this project, talk to your local parts professional about the tools and measurements you'll need --before you start the job--. If you're lucky, the rubber hoses are where you'll find your leak.. simple to replace. Either way, don't forget to bleed the system of air before attempting to drive it again.
Brake fluid could be low. Check for leaky brake lines under the car also. Quite often older cars have rusty brake lines that leak fluid sometimes just a little bit but these should be repaired as they can blow apart when you hit the brakes hard and cause an accident. Check your emergency brake and make sure it as pulled all the way off also.
use steel.
Cold hard steel
hard