Author Topic: hard brake pedal  (Read 2863 times)

Offline newowner1

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hard brake pedal
« 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.

Offline Lt.Del

  • Andy aka:SgtDel
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Re: hard brake pedal
« Reply #1 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.

aka "Andy"

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

Offline Mr Diesel

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« Reply #2 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

1976 C20 Crewcab, 6.2L/SM465
1982 K30 Crewcab , 427TD/TH400
1983 C30, 6.2L/TH400
1983 K30 Crewcab 454/700R4
1986 K10 350/400. 1989 K30 cab/chassis 454/SM465

Offline cruppert77

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Re: booster
« Reply #3 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?

Offline newowner1

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hard brake pedal
« Reply #4 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.

Offline newowner1

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  • Posts: 14
hard brake pedal
« Reply #5 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.

Offline 123 pugsy

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Brake lights
« Reply #6 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.

76 C10 LWB
TPI 350