Brakes on Toro - Hot Rod Forum : Hotrodders Bulletin Board -- 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
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 09-17-2002, 08:59 PM
NAIRB's Avatar Moderator
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Post Brakes on Toro

This is an ongoing problem for me. I am working on an 83 Olds Toronado. The rear brakes were not working well, and the emergency brake didn't work at all. This car has rear disc brakes with the emergency brake lever built into the caliper. This car has had the master cylinder replaced, and the rear calipers, but now I can't get any decent fluid pressure to the rear brakes. I've deducted that the proportioning valve is stuck. I've used suction to pull fluid to the calipers, and manually bled the brakes until I'm blue in the face. The master cylinder was bench bled properly and even returned and replaced with another unit, but the same problem persists, I get a dribble of fluid to the back, but not any good hydraulic pressure. Any ideas? Is this the proportioning valve giving me fits, I almost think it has to be, but I suppose there could be another restriction somewhere, but I don't think so.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 09-17-2002, 11:06 PM
4 Jaw Chuck's Avatar Moderator
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 49
Posts: 6,181
Wiki Edits: 0

Thanks: 121
Thanked 451 Times in 326 Posts

Are you holding down the brake pedal when you are bleeding?
“She may not look like much, but she's got it where it counts, kid. I've made a lot of special modifications myself.”

— Han Solo
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-18-2002, 12:23 AM
aka Duke of URL
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts

Did you replace the rear flexible brake hose?

You might also want to remove the inlet line at the valve and see if flow is available there. If it is, it is a bad valve.

From Master Power Brakes Website;

A tripped combination valve.

If you lose half your braking system and the combination shuttle valve cuts off half the system this can give you a hard pedal. This type of combination valve can be tripped during the bleeding process. To center the valve open a bleeder screw on the half of the system that still has pressure. Depress the brake pedal and tighten the bleeder screw. This should center the valve.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-22-2002, 07:09 PM
NAIRB's Avatar Moderator
Last photo:
Join Date: Sep 2002
Location: cimarron, ks
Posts: 1,658
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post

I finally figured this deal out. I ended up replacing the rear calipers, but I couldn't get them to "pump up" after I put them in. The brake light was on, and would flicker if I stabbed the brake pedal hard, so I replaced the proportioning valve with a high quality used unit, and that cured my fluid flow problem. I bled this baby until I was blue in the face, but the pedal would always be soft, and the rear calipers would retract after I let off the pedal. Once I had the calipers relatively full of brake fluid and free from air, I had to remove the emergency brake levers and tighten the nut up until the brake pads were loaded against the rotors, then I reinstalled the levers, so that the emergency brake levers kept the brakes loaded and VOILA!!!!!! I had a tight pedal, sometimes the obvious eludes us, doesn't it? I messed around with this car on and off for four days, and my customer was mad as a wet hen, but alls well that ends well.
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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

All times are GMT -6. The time now is 03:13 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999 - 2012. All Rights Reserved.