This will take you to the main site where there is history, technical information and other information on these cars.
This takes you back to the main page of the forums.
This is the control panel to change your password, information and preferences on this message board.
Click here if your lost your password or need to register on this message board. You must be a registered user to post. Registration is free.
Search this board for information you need.
Click here to buy cool Squarebirds mechandise.
Click here to support Squarebirds.org. For $20 annually receive 20mBytes webspace, a Squarebirds e-mail address and member's icon on the message board.
  #151  
Old 08-19-2011, 04:52 PM
ncbird ncbird is offline
Experienced
 
Join Date: Jan 5 2008
Posts: 390
ncbird is on a distinguished road
Default previously loved

Hit a salvage yard that has diesel pickups. My superduty uses a small vacuum pump to supply vacuum since a diesel doesn't. The vacuun pumps don't have a high failure rate so should be reasonably priced. As a praticing rodder of 40 years we look in the weeds before paying retail.
__________________
Grant
NCbird on the Coast of NC
"Dads Bird" for my father
Reply With Quote
  #152  
Old 08-19-2011, 07:24 PM
scumdog's Avatar
scumdog scumdog is offline
Super-Experienced
 
Join Date: May 12 2006
Posts: 1,338
scumdog is on a distinguished road
Default

Quote:
Originally Posted by ncbird View Post
Hit a salvage yard that has diesel pickups. My superduty uses a small vacuum pump to supply vacuum since a diesel doesn't. The vacuun pumps don't have a high failure rate so should be reasonably priced. As a praticing rodder of 40 years we look in the weeds before paying retail.
What I've told guys with the same problem on another site I'm on (460ford.com or similar..).

They were surprised such a thing exists!

And over here we have a combo alternator/vacuum pump on a lot of our smaller diesel 4X4 trucks, the pump sits on th end of the alternator.
__________________
A Thunderbirder from the Land of the Long White Cloud.
Reply With Quote
  #153  
Old 08-20-2011, 11:02 AM
davidmij davidmij is offline
Super-Experienced
 
Join Date: Jan 17 2011
Posts: 660
davidmij is on a distinguished road
Default

Awesome gents, thanks!
I'll see what I can find in the diesel line at some junk yards - this will narrow down my troubleshooting quite a bit. (it might be a while until I do)
regards, Dave
Reply With Quote
  #154  
Old 08-21-2011, 08:18 AM
ncbird ncbird is offline
Experienced
 
Join Date: Jan 5 2008
Posts: 390
ncbird is on a distinguished road
Default residual valve

David, take a look at the MBM typical configuration page they
Recommend a residual valve between the proportioning valve and the rear drums. This might be a help in your/our situations. Since most of our upgrades use MBM parts I would think their advice should be considered. Maybe I missed it but has anyone who did the upgrade said they could lock up the brakes? Its usually the back brakes that lock up isn't it? Can you lock the front disc brakes on a factory produced car with disc/drum ? Grant
__________________
Grant
NCbird on the Coast of NC
"Dads Bird" for my father
Reply With Quote
  #155  
Old 08-21-2011, 04:00 PM
scumdog's Avatar
scumdog scumdog is offline
Super-Experienced
 
Join Date: May 12 2006
Posts: 1,338
scumdog is on a distinguished road
Default

Quote:
Originally Posted by ncbird View Post
Maybe I missed it but has anyone who did the upgrade said they could lock up the brakes? Its usually the back brakes that lock up isn't it? Can you lock the front disc brakes on a factory produced car with disc/drum ? Grant
If I can lock up all four brakes easily (almost TOO easily) on my '66 then davidmij SHOULD have been able to lock up all four brakes with the amount of effort he has put onto the brake-pedal.
__________________
A Thunderbirder from the Land of the Long White Cloud.
Reply With Quote
  #156  
Old 08-22-2011, 09:31 AM
davidmij davidmij is offline
Super-Experienced
 
Join Date: Jan 17 2011
Posts: 660
davidmij is on a distinguished road
Default

Yes, very true. Even my old truck can lock em up with little effort.
thx
Reply With Quote
  #157  
Old 08-29-2011, 06:20 PM
kuusamon's Avatar
kuusamon kuusamon is offline
Experienced
 
Join Date: Feb 14 2009
Posts: 305
kuusamon is on a distinguished road
Default

I do not know if it was already suggested in this thread but did you check the length of your 'Hockey stick' bracket?
I am working on my brakes now and noticed something.
If you changed the (to)power brake system to a different or new system maybe the distances are a bit different. (different size bracket etc. Then you have to check the hockey stick bracket, if it is now too short than you can floor your brake pedal but does not mean that the pushrod into the booster is all the way in.
The hockey stick bracket is the one from your brake pedal to the power booster bracket.
Also the free play in the pedal can be adjusted, the bolt that connects the hockey stick to the pedal is an adjustment bolt too by loosing it and turning the bolt because the bolt is not centric.
regards,
Ron
__________________
Greets,
Ronald
Kuusamo
http://www.tbirdregistry.com/viewdat...tryNumber=1741
Reply With Quote
  #158  
Old 11-03-2012, 10:25 AM
davidmij davidmij is offline
Super-Experienced
 
Join Date: Jan 17 2011
Posts: 660
davidmij is on a distinguished road
Default

I was reviewing my posts this morning and realized I never posted what I found on my brake issue.

The company sent me a 9 inch power brake booster to replace the 8 inch - it didn't help, but now I was getting brake fluid bleeding out of the MC after driving the car and applying the pedal. I googled around and found that a couple of things could cause this. One was a frozen wheel cylinder or caliper. If one of your wheel cylinders are frozen, it can cause extra brake line pressure which can cause your brake fluid to leak around your master cylinder cap. I inspected each brake and found one of the rear drum cylinders wasn't working. This caused brake proportioning valve to cause excess back pressure and favor the front brakes. I had previously checked the fluid pressure at each wheel but that doesn't show you if the wheel cylinder is working or not. After replacing it the MC no longer leaked. The brakes are much better now, but still not as good as I would have thought.

Just thought I would update this in case anyone was using it.

regards, Dave J
Reply With Quote
  #159  
Old 11-03-2012, 02:35 PM
scumdog's Avatar
scumdog scumdog is offline
Super-Experienced
 
Join Date: May 12 2006
Posts: 1,338
scumdog is on a distinguished road
Default

Dave, you mention 'brake fluid bleeding' from you m/c and offered an explanation.
This should not happen for the reason you described, the only way brake fluid should be possible to leak would be if the cylinder was upside-down - and I gather yours isn't!.

So where was it leaking from in your case?
__________________
A Thunderbirder from the Land of the Long White Cloud.
Reply With Quote
  #160  
Old 11-03-2012, 04:28 PM
simplyconnected's Avatar
simplyconnected simplyconnected is offline
Slow Typist
 
Join Date: May 26 2009
Posts: 7,073
simplyconnected is on a distinguished road
Default

I agree with Tom. In the '60s I had a Pontiac Tempest. The right rear brake shoes never wore at all but the driver's side did. I unbolted the OEM wheel cylinder and found, the hydraulics hole was never drilled. The rest of the power brake system worked just fine.

I would suspect, if you had a leaky vacuum booster sucking on the M/C, it could draw brake fluid into the booster and into the intake manifold. But, a blocked wheel cylinder acts the same as when the shoes are hard against the drum.

Can you tell us where on the net you found this info? - Dave
__________________
My latest project:
CLICK HERE to see my custom hydraulic roller 390 FE build.

"We've got to pause and ask ourselves: How much clean air do we need?"
--Lee Iacocca
Reply With Quote
Reply


Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 12:47 AM.

Driving, racing or working on cars can be hazardous. The procedures and advice on this website including the message board are opinion only. Squarebirds.org and its webmasters and contributors do not guarantee the correctness of the advice and procedures. The Squarebirds.org and its webmasters assume no liability for any damage, fines, punishment, injury or death resulting from following these procedures or advice. If you do not have the skills or tools to repair your car, please consult a professional. By using this site you agree to hold harmless the Squarebirds.org, its authors and its webmasters from any resulting claim and costs that may occur from using the information found on this site.

Powered by vBulletin® Version 3.6.8
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Any submissions to this site and any post on this site becomes property of Squarebirds.org . The webmasters reserve the right to edit and modify any submissions to this site. All material on this is site is copyrighted by the Squarebirds.org. Reproduction by any means other than for personal use is strictly prohibited. Permission to use material on this site can be obtained by contacting the webmasters. Copyright 2002-2016 by Squarebirds.org.