About the end of March I asked this group about the brakes on my 1970
350 cu in. 350 hp. convertible. The consensus was new callipers.I got new back callipers and all the parking brake bits and that is all OK, but before bleeding the rear and replacing the front, I decided to blow out all the old fluid from the master cylinder and the pipes. I took off the master cylinder, cleaned and re-sealed it and assembled it with new 4 dot fluid.
I tried to blow out the pipe to the rear with the rear callipers disconnected, but the pipe seemed blocked. The brakes were working OK before. I tried sucking with a vacuum supply, but that did not work either. So I filled up the master cylinder reservoirs with new fluid and tried to pump it through. Apart from a couple of tiny bubbles coming out, the fluid did not seem to be going into the cylinder. The brake pedal was not building up pressure. So why is this, I have left it for the night and maybe it needs some fluid to seep through to allow the pumping action to take place?
Has anyone got any ideas as to why this should be. I also would like to know what the small (broken) switch is that sits between the two vacuum overrides for the headlights and the wiper flap, under the steering column. Where do the vac. pipes from these two vac. taps go to in the engine compartment? I need to trace out where I am losing the vac to these two circuits.
Thanks for any comments; they will be most welcome, if anyone knows.
Regards George.