How to Bleed a Slave Cylinder on a Vehicle

Automotive Blog

If the brakes on your vehicle feel spongy, or the clutch doesn't work at all, it commonly means the slave cylinder needs bleeding. Sometimes, air gets into the system after you change something in the hydraulic brake system. Bleeding the slave cylinder ensure all air gets out of the system.

A novice can bleed the slave cylinder with the right tools. Here are tips to bleed a slave cylinder.

Prepare to Work

For this project, you need:

  • latex or neoprane work gloves
  • safety glasses
  • floor jack and jack stands
  • plastic drip pan or soda bottle
  • penetrating oil
  • wrench set
  • a helper
  • brake fluid

Park the vehicle in a lighted area and on a flat surface. Let the motor cool, if the vehicle has been running. Next, prop the hood open, and locate the battery. The battery is commonly a black box under the hood or trunk. Find the negative battery wire, and disconnect it. Close the hood.

Secure the vehicle on a floor jack below one of the front jack points. If you don't know where the jack points are, consult your manual.

Disconnect the Hydraulic Brake Line

Locate the slave cylinder. The slave cylinder is a long, tubular component on the driver's side with steel lines running through it.

Set plastic drip pan or soda bottle under the slave cylinder. Coat the brake line nut with penetrating spray. Let it set several minutes, then use the wrench to remove the nut. Set the brake line aside.

Perform an Initial Bleed

Ensure you buy the right kind of brake fluid, or you may damage the brake system. Check your owner's manual, or it could be printed on the master cylinder reservoir.

Reattach the hydraulic brake line. Remove the fill cap, and pour in fresh brake fluid to the fill line. Locate the bleeder valve, which is a small screw that has a hole in the middle.

Then, open the bleeder valve by turning the screw to the right with an open-ended wrench, but not all the way. Open it enough until fluid seeps out, and you hear air.

Bleed the Slave Cylinder Again

Connect the bleeder tube to the bleed valve. Get a helper to push down on the brake, and hold it. Tell them to keep it down until you close the valve, or more air will get in the system. Fluid should start pouring in the container.

Close the valve when the brake fully releases, and tell the assistant to pump the brake several times, and release it. Refill the slave cylinder with fluid. Open the valve, and repeat the proceeds, except for the brake pumping. Close the bleeder valve.

Add more brake fluid to the cylinder, then attach the cap. Bleeding the slave cylinder regularly keeps it free of air. If you don't trust your skill, or the brakes still don't work, take it to an auto mechanic through shops like Wolfe's Foreign Auto.

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8 March 2017

Keeping Your Vehicles Squeaky Clean

My loving parents surprised me with a new car when I was sixteen-years-old. At first, I couldn’t believe my parents had bought me this new, red sports car. I often spent hours cleaning my vehicle. I wanted to keep it looking like brand new as long as I could. Do you desperately desire to keep your automobiles squeaky clean? Consider investing in some state-of-the-art, vehicle washing equipment. For instance, you might wish to purchase a liquid car cleaner, wax, brushes, a bucket, and a car vacuum. On this blog, I hope you will discover ingenious ways to keep your vehicles looking amazing. Enjoy!