Hi all, need some Hydrovac help. Saturday I started the 62 Hawk and billows of blue smoke poured out of the exhaust. I had no idea what was happening but after a couple minutes it started to stop smoking. I got in the car and stepped on the brakes and the peddal went down to the floor. At that moment I realized what had happened so I shut the engine off and checked my master cylinder and found it bone dry. I disconnected the Hydrovac vacuum hose, plugged the carb fitting and fired the engine, no more smoke.
I then blead the brakes, including the hydrovac unit. Brake peddal was now firm,BUT, I noticed fluid seaping from the control unit on the Hydrovac
I've been reading and studying the hdrovac drawings and I think what happened was that the diaphragm in the contol unit ruptured and allowed the brake fluid to be sucked into the carb. I have disassembled some of the control unit and found the poppet valve spring broken, but have not taken the diaphragm out.
Well guys, what do you think??? Is it the diaphragm or something else?? Thanks for your help. Rudy
I then blead the brakes, including the hydrovac unit. Brake peddal was now firm,BUT, I noticed fluid seaping from the control unit on the Hydrovac
I've been reading and studying the hdrovac drawings and I think what happened was that the diaphragm in the contol unit ruptured and allowed the brake fluid to be sucked into the carb. I have disassembled some of the control unit and found the poppet valve spring broken, but have not taken the diaphragm out.
Well guys, what do you think??? Is it the diaphragm or something else?? Thanks for your help. Rudy

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