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Author Topic: Rear brake problem need help!  (Read 4293 times)

Offline tbarrii

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Rear brake problem need help!
« on: May 08, 2011, 08:50:14 am »
My 85 silverado does not have rear brakes.  i removed the line for the rears at the master and got very little, so i replaced the master.  the new one now has the same problem!  what do i check next. 
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85 Chevy Silverado 1/2 ton 4x4 355ci

Offline Irish_Alley

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Re: Rear brake problem need help!
« Reply #1 on: May 08, 2011, 09:10:58 am »
Proportioning valve. did you remove the line before or after the rubber line that goes to the rear
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Offline tbarrii

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Re: Rear brake problem need help!
« Reply #2 on: May 08, 2011, 10:08:36 am »
i took the line off at the master and after the rubber at the rear end, nothing in between.
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85 Chevy Silverado 1/2 ton 4x4 355ci

Offline VileZambonie

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Re: Rear brake problem need help!
« Reply #3 on: May 08, 2011, 11:00:22 am »
Please clarify. Are you saying you have no hydraulic pressure directly out of the master cylinder for the rear channel? If so did you bench bleed the master cylinder prior to installation? Are you using clean new DOT 3 brake fluid? 
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Offline tbarrii

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Re: Rear brake problem need help!
« Reply #4 on: May 08, 2011, 11:54:11 am »
i have no pressure out of the master to the rear at all.  i did not bench bleed the new master.  what does that entail as i have not done that before.
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85 Chevy Silverado 1/2 ton 4x4 355ci

Offline topp

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Re: Rear brake problem need help!
« Reply #5 on: May 08, 2011, 12:13:39 pm »
Quote from: tbarrii on May 08, 2011, 11:54:11 am
i have no pressure out of the master to the rear at all.  i did not bench bleed the new master.  what does that entail as i have not done that before.

That's your problem right there.
The new master should have come with directions to bench bleed....
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Offline jt1200r

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Re: Rear brake problem need help!
« Reply #6 on: May 17, 2011, 10:38:43 am »
it could be the rubber hose. the inside deteriorates and clogs up
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87 R10 4.3
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