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11-12-2006, 12:34 AM
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#1 |
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Spanked once
 
Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Sticking brake pedal
I just finished a brake redo on my new '71 and my pedal doesn't return all the way back.
New power assist and MC, New rear shoes,cyds and springs, plus drums. New front rotors and pads. I believe it had this problem in the first place to cause the severe wear it already had. It has great stopping power but when the pedal is released I can feel the brakes dragging. I can pull the pedal back with my foot and it is fine. I guess my question is could it be the proportional valve. I have heard in the past if you force the calipers back to install new pads with out opening the bleeder screw it will mess up the valve. 2nd question, these trucks didn't have abs did they? If it does I will by-pass it. I think while typing this I have convinced myself it is the proportional valve. Any ideas? Richard |
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11-12-2006, 02:39 AM
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#2 |
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Registered User
Join Date: Nov 2004
Location: Dover, AR
Posts: 120
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Re: Sticking brake pedal
my 67 done that once, after i put a new brake booster on it. turned out it was where i had tightened the rod that comes out of the booster too tight where it connects to the pedal, and it caused the pedal to bind up and the brakes would drag...just an idea, but i would probably check that before i bought a proportioning valve...and they had no ABS, at least that i've never heard of... hope this helps..
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was 67 chevy swb fleet now muticolored 69 step, 350/350, 3.73 posi, converted to 5 lug, torq thrust II 17x8 front 17x9.5 rear, factory air cab, fuel cell. future plans: shaved wiper cowl, shave stake pockets, phantom grille, and silver paint... 68 camaro ss396 project 54 f*rd project truck |
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11-12-2006, 09:26 AM
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#3 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 12,975
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Re: Sticking brake pedal
Richard. If you can pull the pedal back with your foot then something is binding under there. You can look under there and make sure the brake light switch isn't holding it back, it's adjustable. Remove the pedal to booster rod and move the pedal back and forth to make sure it moves freely. If all inside is ok then go under the hood and examine the booster to firewall mount and linkage there to see if it's making contact where it goes through the firewall.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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11-12-2006, 09:48 AM
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#4 |
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Registered User
Join Date: Apr 2006
Location: southern Il
Posts: 335
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Re: Sticking brake pedal
put a big spring on the brake pedal
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11-12-2006, 10:14 AM
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#5 |
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Registered User
Join Date: Aug 2006
Location: Dallas
Posts: 61
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Re: Sticking brake pedal
your brake pedal spring may need replacing. Like jamon8 said put a big spring in it.
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04 Chevy X Cab 67 Chevy SWB (LuLu) 15 GMC Sierra Crew |
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11-12-2006, 11:30 AM
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#6 |
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Spanked once
Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Re: Sticking brake pedal
I'll check again today for a brake spring under the dash, it was getting late last night when I was looking to see "if" there was a spring under there and did not see one. Hmmmm.
Richard |
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11-12-2006, 03:02 PM
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#7 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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Re: Sticking brake pedal
I can't see any possible way that the prop valve could ever do that.
ABS wasn't even dreamed of back then. I agree with either spring or linkage bind. Is there much freeplay at the top of the brake pedal travel? Is your booster new/rebuilt... or is it an old used piece? I've seen boosters do this in the past too.. Pressing the piston back without opening a bleeder won't do any damage. It is possible (not probable though) on a modern ABS car, but not these old things. |
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11-12-2006, 04:13 PM
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#8 |
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Registered User
Join Date: Oct 2006
Location: NC
Posts: 62
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Re: Sticking brake pedal
You said you was having this problem before the brake job. I would check the bolt that goes through the brake pedal might have a worn place on the bushing,need a little white grease or the bolt and nut could be to tight there.
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'07 G6 Wife's car '00 Malibu stock, just a parts getter. '99 Blazer LT Loaded, K&N Filter, Pioneer Super Tuner,Viper '88 K1500 Cheyenne, 5.0, stock, bought new '86 Nissan 720 Trash Truck '69 C/10 step side, 307, all original, second owner, in process of restore. The person who says it cannot be done should not interrurt the person doing it. Share your knowledge. It is a way to achieve immortality. Allen- Paintman Wrenchtwister Broompusher |
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11-12-2006, 06:10 PM
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#9 |
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Spanked once
Join Date: Oct 2006
Location: Intheshop, Indiana
Posts: 969
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Re: Sticking brake pedal
Thanks for the answers, The problem is the linkage and sloppy pins I'm sure after looking at it again today. I had adjusted the booster for a half inch drop in the pedal as per instructions. "Wrong", the free play I was feeling is the slop under the dash. Even had the CEO out helping find all that was wrong, how's the for desperate?
Thanks again, Richard |
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