Driving safely is one of the major concerns of every driver on the road. To promote safety, most modern vehicles have a hydraulic pressure-operated brake master cylinder. Your Merkur Xr4ti master cylinder, for example, converts the mechanical force received by the brake pedal into hydraulic pressure. This pressure aids in stopping or slowing down the vehicle. Like any other car parts, the master cylinder may wear and get damaged over time. So here are a few tips on identifying if your master cylinder needs repair or replacement:
When you have a bad master cylinder, the first thing you'll notice is that the pedal goes all the way down to the floor upon braking. Step on the brake and observe if the pedal continues to sink after you have released the brake. If it does, then there might be a hydraulic fluid leak in your master cylinder.
This is the most noticeable sign of brake master cylinder damage. Test drive your car and try to step on the brake until it almost touches the floor. If the brake pedal doesn't return to its normal position, then this may indicate the need for a master cylinder replacement.
A broken master cylinder leads to a reduced stopping power. This is because the pressure between the two cylinders is decreased, leading to an immense decrease in the pressure needed to stop the car. Moreover, you may find it unusual that your brakes take longer distance before they stop your vehicle completely. Once these symptoms start showing up, check your master cylinder immediately.
Crawl under your car. Check for signs of leaks directly underneath the master cylinder. A puddle or drops of brake fluid under your car can indicate a leaking master cylinder. To verify if the brake fluid puddle came from your master cylinder, inspect your master cylinder for any cracks or holes. You can also try removing the whole master cylinder from the brake system and checking for wear and damage. If you have confirmed that your master cylinder has gone bad, it's highly recommended that you repair or replace it immediately to prevent damaging the whole braking system.