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06-22-2008, 03:26 PM
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#1 |
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Registered User
Join Date: Nov 2005
Location: cedar hill tx
Posts: 30
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brake pedal problem
i have a 71 i building i bought new master cyl new booster
the pedal will not come back up all the way by it self i have changed the spring do you think it could be the booster? |
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06-22-2008, 04:08 PM
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#2 |
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Active Member
 
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: brake pedal problem
If your check valve and vacuum source are good, my guess is you have a defective booster. There's internal springs and check valves that my be preventing the pedal from returning to it's normal position.
Here's a site that's somewhat simplistic but best illustrates how the booster works. http://auto.howstuffworks.com/power-brake2.htm p.s. If you do a right mouse click on the pic you can zoom in and then drag the picture with the mouse and see the different functions closer up. If you right mouse click again on the pic you can click on play or zoom back out. |
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06-22-2008, 07:50 PM
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#3 |
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Senior Member
Join Date: Jul 2001
Location: Muskegon,MI,USA
Posts: 6,026
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Re: brake pedal problem
Did you have a booster on the truck before? The pedal will be lower with power brakes.
Jim
__________________
1971 Shortbox step side 4x4, 350 sbc, 3:07 rear end 1965 Impala SS 400 sbc, Muncie rock crusher 1966 Impala SS 396 bbc, TH 400 1969 El Camino, 350 sbc, TH 350 1971 Snowplow built on a Blazer frame 1972 GMC Short bed, stepside, TH 400, 427 BBC |
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06-22-2008, 08:45 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: brake pedal problem
the linkages between the booster and firewall can bind and cause this, as can a bum booster.
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06-22-2008, 09:10 PM
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#5 | |
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Active Member
Join Date: Jul 2007
Location: Centrally located between Houston, Austin and Waco. BCS area.
Posts: 7,947
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Re: brake pedal problem
Quote:
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