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#1 |
Registered User
Join Date: Oct 2007
Location: Sherwood Oregon
Posts: 1,908
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Brake Troubles
I have a '68 LWB, and it came with manual drum brakes all around. I converted the front to disc and rebuilt the rear drums. I am using the original master cylinder, and want to know if I need to change that or do something different. I have bled the brake system several times, but the pedal is still soft or gives way. What am I doing wrong?
Thanks, Steven |
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#2 |
I am a Referee of life.
Join Date: Jun 2000
Location: Greensboro N.C.
Posts: 13,993
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Re: Brake Troubles
Disc brakes require a disc brake MC.You probably want to go to a power booster also.You also need to use a proportioning valve for a disc/drum set-up.There will be lots of info in the FAQ's section that will help you pinpoint the problem.
I think you will find that you still need the same pedal pressure to stop without the booster.The residual valves for drums are (IIRC) 10 # and disc use a 2 #. All that said I know some members claim to be running drum MC's on disc equipted trucks but I doubt they have as much improvement in braking as they could have. Just some random thoughts about what may be causing your problem.
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#3 |
Registered User
Join Date: Oct 2007
Location: Sherwood Oregon
Posts: 1,908
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Re: Brake Troubles
Thanks for the reply, I have heard from different people that you can use the same MC, but I don't know what to believe. I guess if it's not working then its time to change something
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Brake Troubles
"mine worked like that" is NOT the same as "was designed to work"
The fluid amount delivered, the pressure delivered, the front to rear differance, all of it is crutial to proper brake operation. |
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