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09-06-2013, 07:42 PM
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#1 |
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Senior Member
 
Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Weak Brake Pedal
I am having trouble with the brakes on my brother's 1969 GMC C15. The truck stops but the brake pedal soft and under hard braking the wheels don't lock up. I have replaced the master cylinder and the rear left wheel cylinder (busted bleeder valve). I also swapped out the portioning valve with an old one I had lying around. The rear shoes and drums looked good. I believe the rear brakes are not getting the correct amount of pressure. When I bled the brakes the front cylinders shot out a stream of fluid but the rear cylinders only dribbled out. Is there something that could be causing this?
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1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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09-06-2013, 07:48 PM
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#2 |
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Senior Member
Join Date: Jan 2003
Location: daytonabeach
Posts: 22,956
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Re: Weak Brake Pedal
that truck should not have a proportioning valve// it had a distribution block from the factory which is completely different
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71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY |
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09-06-2013, 08:40 PM
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#3 |
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Senior Member
Join Date: Jul 2012
Location: Knoxville, TN
Posts: 499
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Re: Weak Brake Pedal
That explains a lot. I was wondering why a drum/drum truck would need a portioning valve.
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__________________
1971 Chevy C10 Cheyenne (sold for Mazda) 1963 Chevy Corvair Pro-Touring Project 2012 Mazda 3 i Sport sedan http://www.dracoautodesigns.com/ |
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