1965 4 wheel disc brakes
I wanna see if you guys have ever heard anything like the situation I am currently having. Ill try and sum it up. My truck has front and rear disc brakes with new master/booster and disc/disc prop valve. I have no brake fluid leaks! My truck has a perfect brake pedal until I hook up my vacuum to my brake booster. When I plug in my vacuum my pedal goes all the way to the floor with slight resistance. However Ive been driving the truck with it unhooked and it does fine. It all started after i replaced booster/master and installed rear disc. Anyone ever seen such??
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Re: 1965 4 wheel disc brakes
Likely a bad booster. My buddy has done his '72 Nova and '68 C10 with CPP boosters and in both cases, they were bad right out of the box. Had them replaced under warranty and the replacements worked perfect.
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Re: 1965 4 wheel disc brakes
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Re: 1965 4 wheel disc brakes
I would say there is still some air. The added brake line pressure from the booster is able to better compress it over the manual brakes.
Jimmy |
Re: 1965 4 wheel disc brakes
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Re: 1965 4 wheel disc brakes
So there are two ways a master cylinder will go to the floor, air or its bad.
Jimmy |
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Re: 1965 4 wheel disc brakes
Have you tried adjusting the push rod on your booster?
Here's a link to the CPP trouble shooting guide. There's a tool they recommend for checking the length http://www.classicperform.com/TechBo...ot.htm#pushrod |
Re: 1965 4 wheel disc brakes
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Re: 1965 4 wheel disc brakes
Does brake booster size have any affect? My old booster was HUGE compared to this 8 or 9" I have now..
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Re: 1965 4 wheel disc brakes
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Here's a helpful article about Booster/Master cylinder combos: http://www.mpbrakes.com/techtalk/boo...ur-classic-car |
Re: 1965 4 wheel disc brakes
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Re: 1965 4 wheel disc brakes
I would just go to your local parts store and buy a master cylinder for a late 60s or early 70s Corvette with power brakes. Those years of Corvette have 4 wheel disc and a 1 1/8 master. Only about $35 but I think they are shallow so your booster pin may need to be changed
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Re: 1965 4 wheel disc brakes
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Re: 1965 4 wheel disc brakes
Don't forget to bench bleed the master before installing.
I hope this helps, good luck. |
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