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06-14-2006, 03:34 PM
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#1 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Brakes Hard as a Rock
Don't have any problems stopping, but they are hard as hell. Just manual brakes, but I do have the big 20's. Just thought I'd ask why they would be hard as rock. New pads, new shoes, and got plenty of fluid.
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Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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06-14-2006, 03:42 PM
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#2 |
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Truck junkie
 
Join Date: May 2006
Location: Reno NV
Posts: 697
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Re: Brakes Hard as a Rock
There are a couple of things that can cause a rock hard pedal depending on whats been done to the system. If the brakes seem to work well my guess would be the master cylinder bore being too big for the system. Power brake setups use a 1" or larger bore in most cases and manual brakes generally use a 7/8" bore or less depending on the system. the larger bore means more volume of fluid but less overall pressure (the volume being the reason the pedal travels less) and a smaller bore means more overall pressure but less volume meaning the pedal travels further to move the amount of fluid it takes to apply the brakes. (this is just one cause) you also can't rule out a tight pivot for the pedal arm, blockage in the system, a faulty residual pressure valve in the master cylinder or combination valve etc. Hope this helps.
Last edited by Oldtruckfanatic; 06-14-2006 at 03:45 PM. |
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06-14-2006, 05:07 PM
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#3 |
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Senior Member
 
Join Date: Sep 2005
Location: Lewisville, Nc
Posts: 10,238
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Re: Brakes Hard as a Rock
my manual brakes are hard just tought tthat was they way they were
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David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube |
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06-14-2006, 07:50 PM
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#4 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Re: Brakes Hard as a Rock
on these trucks, the master cylinder is the same regardless of power brakes or non power brakes.
If they stop the truck fine, you are able to lock them up, and you can do all this with one fiit... then it sounds about right to me. Remember, these were built when men were men. Last edited by Longhorn Man; 06-14-2006 at 07:51 PM. |
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06-14-2006, 08:31 PM
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#5 |
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C10 Club Tennessee
Join Date: Mar 2003
Location: White House, TN 37188
Posts: 8,281
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Re: Brakes Hard as a Rock
like I said I stop, now if I didn't then I'd be complaining. Just wanted to know why they were so hard.
__________________
Bryan www.gmtruckshow.com Project "Andes"-Halen's First Truck Project: Patina Burb for he is God’s servant for your good. But if you do wrong, be afraid, for he does not bear the sword in vain. For he is the servant of God, an avenger who carries out God’s wrath on the wrongdoer. Romans 13:4 |
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06-14-2006, 11:32 PM
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#6 |
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Registered User
Join Date: May 2003
Location: Shreveport LA
Posts: 3,170
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Re: Brakes Hard as a Rock
You might just be used to having some air in the hydraulics, which will make the pedal spongy.
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06-15-2006, 02:34 AM
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#7 |
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Registered User
Join Date: Jun 2002
Location: Knoxville Tenn.
Posts: 3,058
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Re: Brakes Hard as a Rock
Also the 20's act as a longer lever making it harder to stop the wheel from turning.
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56 Chevy Bel-Air 2dr. HT (purchased new) 71 Chevy Cheyenne SWB PU (502HO) 65 GMC short bed step--work in progress and my gofer |
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