On mine air would enter the line through the threads so there was not a closed system between vacuum and brake caliper. Vacuum pumps dont work well when you dont have a good seal around slave cylinder bleeder nipple when loosened.
The Diy 20 Brake Bleeder
Homemade vacuum brake bleeder. As brake fluid bleeds out regularly check the master cylinder to make sure it doesnt bleed dry. Connect a bleeder bottle to one wheel at a time and open the bleeder screw. Unplug one of the cylinder ports and plug in the vacuum pump to it. Open the bleeder valve with a brake bleeder wrench then use the vacuum pump to pump out the old brake fluid. How to bleed brakes using the one person method. Pump the cylinder until you see brake fluid free of bubbles entering the pumps reservoir jar.
Continue to add new brake fluid to the master cylinder. Connect the pressure bleeder to the brake fluid reservoir and pressurize it according to the bleeder manufacturers instructions. Dispose of old brake fluid in a plastic reservoir. Learn how to make your own one person brake bleeder using a plastic bottle and a clear hose for under 5. Any air leak between the master cylinder vacuum will negate the effectiveness of this system. After youre done loosen main sprayer cap slowly to relieve pressure.
Vacuum bleeding is using a vacuum source at individual bleeder screws so that atmospheric pressure on top of the master cylinder reservoir forces brake fluid through to that lower pressure vacuum. Parts needed a vacuum pump old fridge motor a container to hold expelled brake fluid prevents the vacuum pump from sucking up the old brake fluid. When the fluids flow with no bubbles present bleeding is complete. One of the vaf posts suggested a homemade pvc pipe pressure bleeder so i came up with whats pictured. A 3 inch pvc clean out adapter an end cap and the adapter screw in cap. Pour in 1 to 2 liters of super blue or type 200 ate brake fluid and after sucking old brake fluid out of master cylinder with your wifes best turkey baster refill and screw the cap on.
Drill and tap the end cap at its center for 18 inch pipe thread and install a hardware store 18 inch pipe male to 18 inch barbed brass fitting. Repeat the procedure for the remaining wheels. Repeat the bleeding procedure in the other port s. Disconnect the pump from the outlet port and tightly plug the port. Pump it up to pressurize and start bleeding brakes.
Gallery of Homemade Vacuum Brake Bleeder
