No Rear Brakes.... - 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 03-17-2009, 12:54 AM
Datsun SBC/BBC/LSx Guru
 
Last photo:
Join Date: Mar 2007
Location: Bakersfield, Ca.
Age: 34
Posts: 48
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No Rear Brakes....

Hey guys, I am just wrapping up my '69 C10 truck after being apart after swapping to front disc brakes, drop spindles, power booster/master cylinder, and 4 corner air-ride conversion. The rear drums were untouched (for the moment).

Anyway, I had the truck in the air to bleed the brakes and after I was finished I started the truck and put it in drive to test everything while still off the ground. Well as my luck would have it, I have ZERO rear brakes, not even enough to stop the axle while off the ground. The front brakes work fine. I know I have fluid making it back there because I had plenty of brake fluid coming out of the bleeders when I was bleeding them.

Now I know the first question you guys would ask is if they were working BEFORE the swap, well to be honest, I don't know. I haven't really driven the truck since buying it and since it was a manual drum setup all the way around I can't be sure either way. I can tell you the braking was piss-poor compared to my '74 K5.

I've pulled both rear drums, the shoes and drums are great shape, and neither wheel cylinders are leaking, and just be sure I've adjusted both sides shoes to drag lightly on the drums.

My guess would of been the wheel cylinders, but I've never heard of them going bad without leaking, plus what's the odds that both would be bad at the same time?

So guys, I am eager to hear your ideas.

Thanks!!

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 03-17-2009, 05:27 AM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: NJ
Posts: 306
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
did u bleed the rear ones too? maybe someone blocked those off with a small nail in each line so they could spin the tires easier. u said the shoes where like new, and the masters' weren't leaking.. so they must have not been used in a while.. check each fitting and the center brass connector... just my idea..ok u did bleed the rear ones the wheel cylinders could be frozen if u r getting plenty of fluid then its probably bypassing the guts of the thing

Last edited by smrat; 03-17-2009 at 05:34 AM.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 03-17-2009, 05:41 AM
Registered User
 

Last journal entry: 50 Ply wagon
Last photo:
Join Date: Oct 2008
Location: Pottstown,Pa
Posts: 615
Wiki Edits: 0

Thanks: 0
Thanked 28 Times in 27 Posts
You said you put a new master cylinder on. Did you bench bleed the master cylinder before you put in on? If you didn't, that may be the culprit.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 03-17-2009, 09:13 AM
Datsun SBC/BBC/LSx Guru
 
Last photo:
Join Date: Mar 2007
Location: Bakersfield, Ca.
Age: 34
Posts: 48
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by sunsetdart
You said you put a new master cylinder on. Did you bench bleed the master cylinder before you put in on? If you didn't, that may be the culprit.
Yup, bench bled.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 03-17-2009, 09:27 AM
Big Don's Avatar
Registered User
 
Join Date: Dec 2007
Location: Mississippi
Posts: 156
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Brake problem

If all is correct at the rear wheels then the only thing I can come up with is air trapped in the MC. To check for this problem remove MC cover and stroke the pedal SLOWLY and watch for a bubble as the fluid moves. If you see even a small bubble, then thats the trouble. Make sure the MC is level to the earth. Some GMs mount the MC to the firewall and sit out of level and are very difficult, no, impossible to bleed the lines to the rear until the MC is level to the earth. Try it. It won't cost anything but a little time.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 03-17-2009, 09:21 PM
S10 Racer's Avatar
http://www.warsprints.com
 

Last journal entry: W.A.R. (Wingless Auto Racing) Sprint Car Racing
Last photo:
Join Date: Nov 2007
Location: At The Dirt Tracks
Age: 55
Posts: 1,860
Wiki Edits: 0

Thanks: 3
Thanked 57 Times in 52 Posts
The wheel cylinder pistons may be froze up (rusted) inside and not really working. Even a froze up cylinder will appear to be bleeding when you open the bleeder valve but it's not working the pistons. Wheel cylinders are cheap and not worth rebuilding unless you have something rare. I would change the wheel cylinders and then re-bleed them and then they should work.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
this is a saver.... GM build codes TooMany2count General Rodding Tech 24 11-23-2009 09:36 AM
1979 F250 Rear Brakes MrCoolDale Suspension - Brakes - Steering 1 07-14-2007 06:11 PM
Ford Explorer Rear Disc Brakes Lloyd Topping Jr Transmission - Rearend 4 11-10-2002 02:06 PM
rear drum brakes oldcarguy85 Suspension - Brakes - Steering 3 01-08-2002 09:41 PM


All times are GMT -6. The time now is 04:14 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.