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07-19-2007, 09:36 PM
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#1 |
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Registered User
Join Date: Jul 2004
Location: tn
Posts: 149
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brake problem
i have a 72 chevy truck with power brakes and sometimes the pedal goes to the floor and then i can pump it once and it has a good pedal and then it will work good but every once in a while about every 8-10 pumps it will go to the floor again does anyone know why this is happening i think it is the master cylinder but wanted to see what yall thought befor i bought one
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07-19-2007, 09:38 PM
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#2 |
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Registered User
Join Date: Feb 2006
Location: Oklahoma City
Posts: 588
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Re: brake problem
I would guess the master cylinder
__________________
1970 Chevy C10 "Under Construction"  2002 Chevy S10 V6 
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07-19-2007, 09:54 PM
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#3 |
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Registered User
 Join Date: Apr 2006
Location: hopeless in Washington
Posts: 105
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Re: brake problem
also check the booster, if its not getting enough vacuum it'll act that way.
__________________
'69 Chevy CST#'s 396/TH400, A/C |
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07-19-2007, 10:22 PM
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#4 |
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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 problem
I've had that happen on my 69 Chevy and my Tahoe. On mine, both times it was the master cylinder.
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07-20-2007, 12:04 AM
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#5 |
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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 problem
if the booster isn't gettin enough vac.. it'll use the reserve vac in that huge booster... and if that runs out, it'll get hard.
Master for 99% sure. |
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