Brake booster issue - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Suspension - Brakes - Steering
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 11-02-2010, 10:56 AM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: Albuquerque, NM
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Brake booster issue

I just put a new brake booster on my 64 Chevy II. I had switched to disc brakes a year ago, and the booster went bad, so since it was still under warranty, Stainless Steel Brake Company sent me a new one. I installed it, and then took it for a test drive yesterday. The disc brakes in the front kept clamping down as vaccumm built up in the booster, as if the booster is putting way to much pressure into the system. How do I fix this problem? Is there some way to adjust the booster? I tried to adjust it in the front of the booster, where it bolts to the master cylinder, but it didnt seem to do much, if any good. Help!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 11-02-2010, 11:31 AM
adantessr's Avatar
'23 T-Bucket Pickup
 
Last wiki edit: Troubleshooting ignition Last photo:
Join Date: Jun 2010
Location: South Charleston , WV
Age: 62
Posts: 1,549
Wiki Edits: 3

Thanks: 43
Thanked 17 Times in 15 Posts
You need to adjust where the brake pedal linkage goes into the booster . You have to have a little free pedal as well as making sure that there is clearance between the booster and master cylinder . Both of these areas MUST have a little free travel. Not much mind you . 1/16" to 1/8" is plenty .
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 11-02-2010, 01:06 PM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
Although adantessr is correct about some play it needs to be between the peddle and the booster.

Do you remember how many turns you moved that adjustment, just go back that amount. The distance from the booster too the MC should just be not touching.

You describe a situation as if you were ridding the brake peddle, so that is where you need the play.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 11-02-2010, 03:54 PM
adantessr's Avatar
'23 T-Bucket Pickup
 
Last wiki edit: Troubleshooting ignition Last photo:
Join Date: Jun 2010
Location: South Charleston , WV
Age: 62
Posts: 1,549
Wiki Edits: 3

Thanks: 43
Thanked 17 Times in 15 Posts
Quote:
Originally Posted by pepi
Although adantessr is correct about some play it needs to be between the peddle and the booster.

Do you remember how many turns you moved that adjustment, just go back that amount. The distance from the booster too the MC should just be not touching.

You describe a situation as if you were ridding the brake peddle, so that is where you need the play.
That's what I was trying to say , but I guess I didn't articulate it correctly. QUOTE : You need to adjust where the brake pedal linkage goes into the booster . You have to have a little free pedal .
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 11-02-2010, 04:22 PM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: Albuquerque, NM
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I did adjust between the pedal and the booster, and I still had the same problem a few blocks down the road. My brakes were smokin! I pulled over and made more adjustment, and pulled the vaccumm out of the booster, replaced it, and made it home - a little better, but the car doesnt roll like it should , and it still feels as though im riding the brakes when I am not. I will adjust it some more and test it out again.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 11-02-2010, 04:31 PM
adantessr's Avatar
'23 T-Bucket Pickup
 
Last wiki edit: Troubleshooting ignition Last photo:
Join Date: Jun 2010
Location: South Charleston , WV
Age: 62
Posts: 1,549
Wiki Edits: 3

Thanks: 43
Thanked 17 Times in 15 Posts
I'd verify that you do have a little clearance between the booster and the master cylinder and if all checks out you may very well have a bad booster . Did the brakes release when you disconnected the vaccuum hose ? You might take it just around the block with the hose disconnected and plugged . Don't go too fast 'cause you will have to stand on the brakes to stop .
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 11-03-2010, 08:05 AM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by adantessr
That's what I was trying to say , but I guess I didn't articulate it correctly. .

very astute thank you.

I would think that the rear brakes would be affected also.

Here is a references that can help you solve the problem; talks about dragging brakes.
http://www.mpbrakes.com/technical-su...ng-disc-04.cfm
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 11-03-2010, 11:32 AM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: Albuquerque, NM
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thank you everyone. It was the booster pin. I shimmed the master cylinder awy from the booster, and the car rolled much better, so I turned in the booster pin, and the brakes are working just like they should now!
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 11-03-2010, 11:47 AM
pepi's Avatar
How’s that hopey-changey thing
 
Last wiki edit: Determining top dead center
Last journal entry: Quicky frame dolly
Last photo:
Join Date: Mar 2005
Location: Georgia ... USA
Posts: 1,835
Wiki Edits: 8

Thanks: 0
Thanked 0 Times in 0 Posts
Killer .... did the MP link help you on that?
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 11-03-2010, 12:28 PM
adantessr's Avatar
'23 T-Bucket Pickup
 
Last wiki edit: Troubleshooting ignition Last photo:
Join Date: Jun 2010
Location: South Charleston , WV
Age: 62
Posts: 1,549
Wiki Edits: 3

Thanks: 43
Thanked 17 Times in 15 Posts
Quote:
Originally Posted by hcmill66ss
Thank you everyone. It was the booster pin. I shimmed the master cylinder awy from the booster, and the car rolled much better, so I turned in the booster pin, and the brakes are working just like they should now!
I am glad you got it taken care of. I'll bet that the next time you replace a booster or a master cyl for that matter you'll think to check before bolting it up . The reason it showed up in the front more than the rear is because the disc brakes don't have any free travel . Back to post #2 .
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 11-03-2010, 07:57 PM
Registered User
 
Last photo:
Join Date: Nov 2010
Location: Albuquerque, NM
Posts: 14
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I had already figured it out by the time the link was posted, but that link confirmed that I had the problem I thought I had. Thank you.
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Settle a Brake Issue Doubleclutch Suspension - Brakes - Steering 6 07-31-2014 09:12 AM
Brake Booster vs. 351W - HELP!!! Fairlane351 Engine 19 04-19-2010 10:48 AM
Questions about master cylinder and brake booster mike69 Suspension - Brakes - Steering 1 08-15-2009 09:42 AM
Brake Booster F150fatman Suspension - Brakes - Steering 2 07-21-2007 04:32 PM
Brake Booster - Hard to change? RapidRoy Suspension - Brakes - Steering 2 09-15-2004 08:19 AM


All times are GMT -6. The time now is 05:26 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.