Pressure Brake Bleeding
Perfect for the one-man operation, when manual bleeding is not an option, pressure bleeding can be one of the most efficient ways to bleed your brake system. A great option in this case is our Motive Power Bleeder under Speedway part number 91083892.
First, be sure to pressure test the cap before adding fluid to insure there are no air leaks. Pressurize the tank to 10psi and check for leaks at the master cylinder and at the Power Bleeder. Never remove the reservoir cap before depressurizing the Power Bleeder tank. To relieve pressure, just slowly remove the pump cap.
Then fill the pressure bleeder with up to 2 quarts of brake fluid and pressurize it to approximately 15psi, be sure not to exceed 20 psi. Higher pressures may damage your hydraulic system. As the pressure increases, it’s normal to see some air pockets in the tube.
On a typical street rod application you will start by loosening the caliper or wheel cylinder farthest from the master cylinder, the passenger rear, then the left rear, passenger front, and left front. It’s helpful to attach clear tubing onto the bleeder valve to route the fluid away from the wheel and observe any air bubbles coming out. On other applications, you may consider referring to the manufacture’s recommendation
Loosen the bleeder valve and bleed until the fluid runs clear and is free of bubbles, then re-tighten. Repeat this step at each wheel and keep in mind you may need to pump additional pressure into Power Bleeder.
When you’re completed, release pressure by slowly loosening pump cap. Be sure to check the fluid level in the master cylinder and firmness of the pedal before test-driving.