Not sure why you would want to empty your master cylinder...but if you are going to be bleeding your brakes and don't want to force old brake fluid through the lines before new fluid reaches them, you can start by sucking out the old brake fluid from your master cylinder by using a turkey baster (just don't let your wife know...or better yet, buy one at the dollar store just for this purpose.)
OR, if you have a mity-mite hand vacuum pump to help bleed your brakes, use THAT to suck out the old fluid from the master cylinder.
Just be careful once you've sucked out what you can (if flushing system w/new fluid) to immediately put fresh fluid in before the brake pedal is touched...otherwise you risk getting air bubbles in your brake lines, that will mean a lot more pumping and bleeding until all the air is forced all the way through the brake lines and out past your wheel cylinders.
If you want to drain it because you have to replace it, just suck out all you can, put an old towel under it before loosening the brake lines that lead from it, and any residual fluid will leak onto the towel as you disconnect the lines and master cylinder itself.
BEWARE: Brake fluid is death to car paint! Drape accordingly, and if any fluid DOES leak onto a painted surface do not pass go, go directly to clean-up mode.
After you have located the clutch slave cylinder, have someone depress the clutch pedal. You should see the piston of the slave cylinder extend somewhat. If it does not, either the slave cylinder is bad, or the master cylinder, or, there is not enough brake fluid in the system for it to operate properly. Check the level in the master cylinder. If the slave cylinder is leaking profusely, it is probably bad.
Answer: Normally located down by clutch arm (that sticks out between the engine and transmission). How do you locate it? The clutch pedal depresses a clutch master cylinder on the firewall (driver side). Follow the hose line down to the where the clutch arm is located. NOTE: don't get the brake master cylinder and clutch master cylinder confused, its easy if you do not work on cars regularly.
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A brake master cylinder? If you are losing brakes or brake fluid.
Brake master cylinder repair is where someone or some body fixes the master cylinder on your brakes. It is the main line to your brake apparatus. Also the master cylinder is the container for the fluid and the piston, forming part of a device such as a hydraulic brake or clutch.
Master cylinder empty (no brake fluid) Leak in brake line or wheel cylinder Defective master cylinder
Drain the brake fluid from the brake master cylinder reservoir. Remove the wiring harness from the brake cylinder. Remove the brake lines. Remove the brake cylinder retaining nuts. Reverse the process to install the new master brake cylinder.
The master brake cylinder is under the dash beside the steering colum
The brake valve is located next to the master brake cylinder. The valve can be found just below the master brake cylinder.
The clutch master cylinder and the brake master cylinder are part of the same system . Both can be filled at the brake master cylinder using brake fluid
Look to see where you fill the brake fluid and where your filling the brake fluid that is the master cylinder.
Master Brake cylinder replaced and lines bled-how long?