What is the Brake Master Cylinder about?
The brake master cylinder has brake fluid and is connected to the brakes via the brake pipes and hoses. When you depress the brake pedal, brake fluid flows through the master cylinder to the braking unit at each wheel, generating enough friction to slow down and/or halt the car. The brake master cylinder has internal and external seals that could wear out over time.
If the external seals have worn out, they will start to leak brake fluid, reducing the amount of fluid in the vehicle and causing the brakes to misbehave. Worn external seals can also leak the fluid into the brake booster and spoil it. The brake booster is vital for the proper operation of the brakes, so if brake fluid has leaked into it, replacement is needed.
when the internal seals have worn out, the brake fluid will keep to circulating inside, instead of being directed to the brakes. This will weaken the brake performance. The brake pedal will thus feel soft. When you apply the brakes, the pedal will go all the way to the floor without significant slowing down or stopping of the car.
After chnging the brake master cylinder, the mechanic should be sure to flush the old brake fluid out and chnage it with new brake fluid.
Bear in mind:
- A leaking brake master cylinder can atimes result in a broken brake booster; in this case, both elements will require replacement.
- Brake systems are completely sensitive to debris, so they have to be cleaned thoroughly before and during the change of a master cylinder.
- The air will require being bled out of the system before the new master cylinder is mounted.
How it is done:
- Check the brake master cylinder for leaks.
- Check brake booster.
- Remove and change the brake master cylinder if faulty.
- Repalce the brake fluid.
- Bleed complete brake system of air.
- Wash brake fluids from all the wheels.
- Carry out brake safety inspection.
Your mechanic should inspect the amount of brake fluid every time the vehicle is serviced. If you feel a change in the way your brake pedal feels (a softer pedal), you should have a mechanic check the master cylinder and brake hoses. In most vehicle, the brake warning light should come on when the amount of brake fluid is lower than the manufacturer’s recommended quantity.
What common signs indicate you may have to replace the Brake Master Cylinder?
- Brake warning light comes on.
- Brake fluid leak (clear fluid on the ground or under the brake pedal inside the vehicle.)
- Soft brake pedal (pedal goes all the way to the floor when depressed).
How vital is this?
All services associated with proper operation of your brakes are vital. In addition to safety issues, ignoring small repairs can quickly result in more serious (and more expensive) issues.
SEE ALSO:HOW TO REPAIR A BRAKE CYLINDER