To remove brake fluid from your vehicle's braking system, you typically need to drain it, often as part of a brake fluid replacement procedure.
Removing brake fluid from your car's braking system involves a process of bleeding the brakes, which drains the old fluid out. This is commonly done when replacing old, contaminated, or worn-out brake fluid with new fluid.
Step-by-Step Guide to Removing/Draining Brake Fluid
The core method for removing brake fluid from the system involves accessing the bleed nipples located on each brake caliper or wheel cylinder.
Here's a breakdown of the process based on the provided reference:
- Locate the Bleed Nipple: Find the bleed nipple at the back of each brake caliper (for disc brakes) or wheel cylinder (for drum brakes) on each wheel.
- Prepare for Draining: Place a suitable container (like a clear bottle) under the bleed nipple to catch the old brake fluid. You might also attach a clear tube to the nipple to direct the fluid into the container.
- Open the Bleed Nipple: Using the correct size wrench, release the bleed nipple at the back of each brake caliper/wheel cylinder. Opening the nipple allows the fluid to flow out.
- Drain the Fluid: Go to each caliper/wheel cylinder in turn. With the nipple open, allow the old brake fluid to drain out. This can be assisted by having someone slowly pump the brake pedal (while ensuring the master cylinder reservoir doesn't run dry) or by using a vacuum pump or pressure bleeder.
- Observe the Fluid: Continue draining until the old fluid is removed. As you add new fluid to the master cylinder (if replacing), you will see the fluid color change as the new fluid comes through. Also, watch for and eliminate any air bubbles.
- Close the Nipple: Once the old fluid is drained and new fluid is coming through (and air bubbles are gone), tighten the bleed nipple firmly (but do not overtighten).
- Repeat for All Wheels: Perform this draining process at each wheel station (usually starting with the wheel farthest from the master cylinder and working your way closer).
Important Considerations:
- Safety First: Brake fluid is corrosive and can damage paint. Wear appropriate safety glasses and gloves.
- Proper Disposal: Dispose of old brake fluid responsibly according to local regulations.
- Keep Reservoir Full: If you are replacing the fluid, always ensure the master cylinder reservoir has enough new fluid to prevent air from entering the system during the process.
- Consult Service Manual: Always refer to your vehicle's specific service manual for the correct bleeding sequence and procedure.
This process effectively removes the old brake fluid from the lines and components by pushing or pulling it out through the lowest points in the system (the bleed nipples).
