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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: tbarrii on May 08, 2011, 08:50:14 am

Title: Rear brake problem need help!
Post by: tbarrii 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. 

Title: Re: Rear brake problem need help!
Post by: Irish_Alley 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

Title: Re: Rear brake problem need help!
Post by: tbarrii 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.

Title: Re: Rear brake problem need help!
Post by: VileZambonie 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? 

Title: Re: Rear brake problem need help!
Post by: 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.

Title: Re: Rear brake problem need help!
Post by: topp 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....

Title: Re: Rear brake problem need help!
Post by: jt1200r on May 17, 2011, 10:38:43 am

it could be the rubber hose. the inside deteriorates and clogs up