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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: newowner1 on September 18, 2006, 09:46:00 PM

Title: hard brake pedal
Post by: newowner1 on September 18, 2006, 09:46:00 PM

i just bought this truck from a guy that left it in a field for 2 years. whe i got it the front brake res was tatally empty. and when you started the truck and pushed the brake pedal you could hear air leaking like a bad booster. So i went to the junkyard and got another booster and now the pedal is hard as @#%$ to push and the brakes dont stop well.and the leaking noise is much louder. i am lost.

Title: Re: hard brake pedal
Post by: Lt.Del on September 18, 2006, 09:31:00 PM

I would take each wheel cylinder and caliper apart.  Two years is a  long time to sit.  Get some rebuild kits and go to town redoing your cylinders.  Ensure you bleed the line completely, get a few bottles of brake fluid.  

If after all that is done and still same problem, go back to the parts truck and get a proportioning valve and replace your old one.  Re bleed all your brake lines again.

Do you have power brakes?  Is your booster working correctly when motor is running?

just a few thoughts.

SgtDel
aka "Andy"

www.delbridge.net

1979 Big 10 383 stroker
1991 Blu 'Burb 3/4 ton 4x4

Title: booster
Post by: Mr Diesel on September 19, 2006, 02:48:00 AM

Sounds like the booster you put on is worse than the one you replaced. They don't cost much new. I think I paid about $100 for the booster AND new master cylinder from Autozone.

- Mr Diesel
'76 C30 Crew 6.2

Title: Re: booster
Post by: cruppert77 on September 19, 2006, 05:27:00 PM

if it sits too long, water will condinsate in the line and rust solid. I've seen it completely fill the lines and calipers. When we tried to bleed the lines, nothing. I don't know if two years is long enough?

Title: hard brake pedal
Post by: newowner1 on September 22, 2006, 04:19:00 PM

So why did the noise get louder and the pedal is rock solid now? and im losing fluid all of a sudden.

Title: hard brake pedal
Post by: newowner1 on September 22, 2006, 07:10:00 PM

OK, and now my brake lights are always on......any ideas?
also, i put the old booster back in and im back to squishy brakes(will try bleeding tomorrow). But at least the leaking noise is gone. but what is up with the lights now?Thanks for any help.

Title: Brake lights
Post by: 123 pugsy on September 22, 2006, 07:37:00 PM

The brake light switch is in front of the brake pedal.It probably got knocked when you were changing parts.Its adjustable with a nut on it.