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01-13-2016, 11:42 PM
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#1 |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Brake pressure question
I just replaced 2 wheel cylinders & brakes all around on a 63 non power brakes. We bled all 4 cylinders it builds pressure on ea one, but when I go to step on the brake it slowly go's down once then it builds pressure again. if I let it sit it does the same go's down then builds pressure. any ideas?
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01-14-2016, 12:04 AM
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#2 |
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Registered User
Join Date: Jan 2014
Location: Wasilla Alaska
Posts: 537
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Re: Brake pressure question
Do ya know the master cyl. is good for sure?
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01-14-2016, 12:47 AM
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#3 |
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Hollister, CA.
 
Join Date: Sep 2006
Location: Hollister, Ca.
Posts: 6,147
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Re: Brake pressure question
Sounds like the master is bad.
Did you replace the master as well ? If so, did you bench it first ? Traces of a leak down firewall ?
__________________
John What the Heck is that ?? CURRENT BUILDS: 62 BurbMaster  Other Builds: My '63 C-10,LWB,CC,BBW '06 HD StrAight Axle Swap Father/Son '67 C-20, LQ9,4L80,Bagged,8-Lugger !!Good Friend Richard's Build AMERICAN CUSTOMS & CLASSICS (831) 630-1965 www.ACCHOLLISTER.com ACC on FACEBOOK "Rest in Peace, Mom & Dad ... I will see you again someday!" |
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01-14-2016, 12:53 AM
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#4 |
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Registered User
Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
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Re: Brake pressure question
When you say "it goes down" do you mean it goes close to the floor and you can pump it a few times and the pedal comes up ? or that with pressure on the pedal it slowly goes down to the floor?
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01-14-2016, 12:57 AM
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#5 | |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Re: Brake pressure question
Quote:
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01-14-2016, 12:58 AM
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#6 | |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Re: Brake pressure question
Quote:
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01-14-2016, 01:09 AM
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#7 |
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Registered User
Join Date: Jan 2014
Location: Wasilla Alaska
Posts: 537
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Re: Brake pressure question
How about adjusting the brake shoes back out till they just start to touch? then back a turn maybe
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01-14-2016, 01:20 AM
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#8 | |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Re: Brake pressure question
Quote:
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01-14-2016, 01:21 AM
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#9 |
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Registered User
Join Date: Jun 2013
Location: joshua tree ca.
Posts: 1,484
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Re: Brake pressure question
YEP sounds like brake adj is needed and possibly still some air in the system
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01-14-2016, 02:24 AM
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#10 |
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60-66 Nut
 Join Date: Mar 2007
Location: Coeur d'Alene, Idaho
Posts: 23,247
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Re: Brake pressure question
I agree that it sounds like a bad master. It could have an internal leak. My DD '68 had a similar issue. I replaced all the shoes and one leaky wheel cylinder, hoping that might be it but I still ended up replacing the master. Now I have good brakes.....well as good as manual drum/drum brakes can be.
__________________
Power Steering Box Adapter Plates For Sale HERE Power Brake Booster Adapter Brackets For Sale '63-'66 HERE and '67-'72 HERE and '60-'62 HERE and "60-'62 with clutch HERE Rear Disc Brake Brackets For Sale. Impala SS calipers HERE Camaro Calipers HERE D52 Calipers HERE 6 Lug HERE Hydroboost Mounting Plates HERE |
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01-14-2016, 02:36 AM
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#11 |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Re: Brake pressure question
I'll start with the adjustment & hope that does the trick, If not proceed with the master.
Thanks guys |
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01-14-2016, 07:56 PM
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#12 |
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Registered User
Join Date: Dec 2008
Location: Stockton CA
Posts: 2,364
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Re: Brake pressure question
All it needed was a brake adjustment, Thanks guys
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