Vacuum bleeding can be carried out by one person. Since a good vacuum bleeder will normally move more fluid than a brake pedal stroke, this procedure is preferred. These tools are inexpensive and readily available at auto parts outlets.
- Follow the preparatory steps, above.
- Attach the vacuum bleeder according to the manufacturer's recommendations.
- Pump up the unit until maximum vacuum is reached. Loosen the bleeder screw slightly until bubbles and fluid issue forth. Close the screw before the vacuum is equalized.
- Repeat the procedure until fluid without bubbles issues from the bleeder screw.
Keep a close check on master cylinder fluid level during this procedure as vacuum bleeders move considerable amounts of fluid.