Brake Pedal Goes To Floor After New Master Cylinder

The first thing to check when your brake pedal goes to floor is to raise the hood and check the brake master cylinder s reservoir.

Brake pedal goes to floor after new master cylinder.

The brake pedal will go to the floor and subsequent efforts to get a satisfactory brake pedal will fail. A no brake pedal condition can be encountered after a new master cylinder is installed leading the technician to believe that the master cylinder is defective. Brought vehicle into shop and checked over pedal is soft if you pump it several times it holds breifly and then fades away the rear brakes were junk there were chunks out of the rotors replaced rear brakes there are no lines leaking on vehicle replaced the master cylinder. The condition can be caused by the piston sticking in the bore of the master cylinder during the bleeding process when the brake system is manually bled.

A good indication of this condition is lack of fluid flow from the brake bleeders. Brake lines don t appear to be damaged one was replaced after wear but still no change. The air prevents brake fluid from efficient flow inside the brake lines damaging the brake lines and giving the. Brake pedal goes to floor troubleshoot fix in under 45 minutes check for brake fluid leak.

The second action you can take is to check the brake master cylinder as it has two sets of seals which can wear in time and cause leaks. Follow the vehicle s manufacturer specified bleeding procedure. 2 check the brake master cylinder. If the reservoir is empty or the brake fluid level is low there is most likely a leak somewhere in the brake system.

Brake pedal has been going to the floor barely slowing the car. Anytime you have a brake pedal that goes to the floor raise the hood and locate the brake master cylinder s reservoir using a flashlight check the level of the fluid or just remove the lid of the reservoir and look inside. Any idea on what might be causing this. This happens mainly if no air bleeding was done after installing a new master cylinder and thus there is air in the brake lines.

Many drivers have reported that brake pedal goes to the floor after new master cylinder replacement. Mechanic said brakes are fine but don t know if i should trust that. This is likely not the case. If this is indeed the issue the brake master cylinder must be replaced with a new one.

Often the culprit is a leaking caliper or wheel cylinder seal. Ensure master cylinder is bench bled prior to installation. Customer has been driving vehicle with soft pedal for a couple of months he has been pumping the brakes to stop.