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| + | When changing hydraulic components of the brake system, the air needs to be bled out of the brake lines. This also needs to be done when replacing the brake fluid per the two-year schedule. Also be sure the bleed the [[brake master cylinder]] if it runs dry. | ||
| + | |||
| + | = Overview = | ||
| # Bleed the master cylinder (sometimes called "bench bleeding" but can be done while installed in the car) | # Bleed the master cylinder (sometimes called "bench bleeding" but can be done while installed in the car) | ||
| # Bleed the front wheel cylinders | # Bleed the front wheel cylinders | ||
| Line 4: | Line 7: | ||
| = Method 1= | = Method 1= | ||
| - | The fluid prevents air from going back up into the cylinder. | + | The fluid prevents air from going back up into the cylinder, and can be done by one person (no assistant needed). |
| # Put about 1" new fluid in a clear glass | # Put about 1" new fluid in a clear glass | ||
| Line 20: | Line 23: | ||
| = Traditional Method = | = Traditional Method = | ||
| + | The traditional method of brake bleeding requires an assistant to work the pedal, while the mechanic tends to the wheel cylinders. | ||
| + | |||
| # loosen bleeder | # loosen bleeder | ||
| # push brake pedal down and hold it down | # push brake pedal down and hold it down | ||
Revision as of 05:49, 13 May 2013
When changing hydraulic components of the brake system, the air needs to be bled out of the brake lines. This also needs to be done when replacing the brake fluid per the two-year schedule. Also be sure the bleed the brake master cylinder if it runs dry.
Contents |
Overview
- Bleed the master cylinder (sometimes called "bench bleeding" but can be done while installed in the car)
- Bleed the front wheel cylinders
- Bleed the rear wheel cylinders
Method 1
The fluid prevents air from going back up into the cylinder, and can be done by one person (no assistant needed).
- Put about 1" new fluid in a clear glass
- put a hose from the bleeder to the bottom of the glass, making sure the new fluid covers end of hose
- Crack the bleeder slightly
- pump the brake pedal while you watch the glass. When air bubbles stop coming out, it's done.
- tighten bleeder
- top-up the master cylinder
- bleed the next wheel cylinder
Method 2
Discussion: Bleeding the brakes.....on your own
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Traditional Method
The traditional method of brake bleeding requires an assistant to work the pedal, while the mechanic tends to the wheel cylinders.
- loosen bleeder
- push brake pedal down and hold it down
- tighten bleeder
- let brake pedal up
- repeat until clean, steady stream fluid comes out