Power bleeder operation
 

I just recently changed the brake fluid in my 1977S. I bought the power bleeder to do the job because I can never find someone to help push the brake pedal down for me when I need it. In any event, I pumped it up to about 15 pounds pressure and prodeded to go around to the right rear and get started in the bleeding process. I notice fluid in the front of the car. Its the new brake fluid that I just put in the reservoir coming out the air tube. I loose the fluid. I try again with less pressure. Same thing. I was'nt loosing any fluid before the project, haven't lost any since finishing the project the old fashion way. What did I do wrong? Pedal now strong, stops on a dime.

Power Bleeder Blues
 

Don't feel too bad! I did the same thing the first time I used my power bleeder. If you take a look at the fluid resevoir on the master cylinder, you will find an overflow vent on the left (drivers) side of the resevoir. Pull the hose, make a plug using a short piece of vacuum line with a small screw in the end, put the newly made plug on the resevoir and you will be good to go.

Good Luck!

Fred Cook
'80 911SC

Many of us just use a pair of needle nose vise grips and pinch the overflow hose to eliminate the problem. Does this risk damage to the hose. I notice that it has a braided cover but what material is used under the cover?

All you need to do is lightly crimp the overflow hose.
I bend to hose over itself, and hold it bent between the jaws of a cresent wrench - just enough to keep it crimped, which is not very tight.

Next time, hook up the unit without putting the fluid in... pump the pressure up & make sure it holds the indicated pressure for a couple of minutes to show it won't leak fluid later. If the guage shows no pressure drop, then you won't have any leaks later when you add fluid & do the job. It took me a few tries with the "dry run" before I had the overflow tube sealed to my satisfaction.
regards,
jlex.

Bleeder question
 

Thanks guys. A simple problem with good answers. I should have realized that that would solve my problem. Got lost in the forest because of the trees.