brakes - Dodge Cummins Diesel Forum
89-93 Non-Powertrain Discussion of 1st Gen. Topics Not related to the Powertrain...NO ADVERTISING

 
LinkBack Thread Tools Display Modes
post #1 of 10 (permalink) Old 06-19-2014, 06:58 PM Thread Starter
Newbie
 
Join Date: Jun 2014
Posts: 9
Thanks: 4
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
brakes

I got a 89 w250 my abs unit things that sit in the frame rails are shot so I had bypassed both front and rear people say that these trucks stop straighter and faster without them anyway well here's my problem no matter how much I bleed em the pedal is still soft it comes up and the truck stops so its not a big deal but was wondering why I don't have the stopping power I was hoping for any help would be great thanks

1989scummins is offline  
Sponsored Links
Advertisement
 
post #2 of 10 (permalink) Old 06-19-2014, 09:54 PM
Newbie
 
Join Date: Jun 2010
Location: So Cal
Posts: 34
Thanks: 2
Thanked 3 Times in 3 Posts
iTrader Score: 0 reviews
I would suspect the master cylinder

91 350, 4X4, 5.9, Auto Trans, Non IC, HE Radiator, Flow through Exhaust, K&N,
2007 3500 Quad Cab Laramie 4X4 Long Bed
2013 5500 C/C 12' Reefer box on Board 4X4 Pto Opt. Aisin 6 speed
DBS1 is offline  
post #3 of 10 (permalink) Old 06-20-2014, 12:02 AM
Cummins Enthusiast
 
Dodgeboy360's Avatar
 
Join Date: Nov 2012
Location: Ontario Canada
Posts: 273
Thanks: 10
Thanked 26 Times in 18 Posts
iTrader Score: 0 reviews
Rear brake adjustment? I just did my rear and upgraded to 1 ton 3" pads and wheel cylinders.. Bypassed abs and she almost stops on a dime now

1993 w250 RCLB build thread

To view links or images in signatures your post count must be 3 or greater. You currently have 0 posts.
Dodgeboy360 is offline  
Sponsored Links
Advertisement
 
post #4 of 10 (permalink) Old 06-20-2014, 12:10 AM Thread Starter
Newbie
 
Join Date: Jun 2014
Posts: 9
Thanks: 4
Thanked 0 Times in 0 Posts
iTrader Score: 0 reviews
I did all new everything in the rear and up front with all new lines I just can't seem to get the pressure
1989scummins is offline  
post #5 of 10 (permalink) Old 06-22-2014, 08:07 AM
Diesel Head
 
Join Date: May 2011
Location: northeast Ohio
Posts: 2,200
Thanks: 55
Thanked 367 Times in 295 Posts
iTrader Score: 0 reviews
Does the pedal travel a bit then get hard? Im also suspect of incorrect rear adjustment.

If hard right off the bat, the "safety valve" could be stuck, cutting off the rear brakes.

92 d250 le creampuff, rc auto and stone stock.
Ruderunner is offline  
post #6 of 10 (permalink) Old 06-25-2014, 10:35 PM
Cummins Nut
 
Join Date: Jun 2014
Location: Knights valley CA
Posts: 423
Thanks: 132
Thanked 22 Times in 20 Posts
iTrader Score: 0 reviews
I'm having the same problem. I didint bypass the abs but my peddle gets applys down lower than it should. The rear adjustments r good I can tighten them up really tight and I have the same problem. I just replaced all the brakes master cylinder and brake booster. My abs plug is bad so the light is on it in the cab if that makes a difference. Where would I find this safety valve?
Angusbull is offline  
post #7 of 10 (permalink) Old 06-27-2014, 07:33 PM
Diesel Head
 
Join Date: May 2011
Location: northeast Ohio
Posts: 2,200
Thanks: 55
Thanked 367 Times in 295 Posts
iTrader Score: 0 reviews
Depending on year the valve is either in the cahnnel of the frame under he firewall or on top of the frame just under the master cylinder. It has a "safety" valve to cut off the front or rear brae in the event of a blown brake line or leak.

92 d250 le creampuff, rc auto and stone stock.
Ruderunner is offline  
post #8 of 10 (permalink) Old 06-27-2014, 08:41 PM
Rescue Tower
 
Shainer's Avatar
 
Join Date: Jul 2008
Location: Colorado
Posts: 10,827
Thanks: 683
Thanked 1,915 Times in 1,395 Posts
iTrader Score: 0 reviews
Quote:
Originally Posted by 1989scummins View Post
I did all new everything in the rear and up front with all new lines I just can't seem to get the pressure
When you pump the brakes up (you don't have to be moving). Will the pressure maintain or does the pedal slowly sink to the floor? If it sinks you either have a leak, or your master cylinder is failing. If it stays solid, then something is out of adjustment. It is common for guys to ruin master cylinders in older rides when they bleed the brakes. Reason is they use more of the cylinders stroke than is normally used in every day driving. The extended stroke pushes through rough areas in the cylinder tearing up the seals allowing fluid to bypass.

Custom pinstriped Power Wheel. I started out with very little... I still have most of it. Feel free to PM me anytime.
Shainer is offline  
post #9 of 10 (permalink) Old 06-27-2014, 10:10 PM
Cummins Nut
 
Join Date: Jun 2014
Location: Knights valley CA
Posts: 423
Thanks: 132
Thanked 22 Times in 20 Posts
iTrader Score: 0 reviews
Thx guys I will look around and figure try to figure it out.
Angusbull is offline  
post #10 of 10 (permalink) Old 06-28-2014, 03:46 PM
Cummins Nut
 
Join Date: Jun 2014
Location: Knights valley CA
Posts: 423
Thanks: 132
Thanked 22 Times in 20 Posts
iTrader Score: 0 reviews
What fittings should I need 2 bypass the rear abs
Angusbull is offline  
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Dodge Cummins Diesel Forum forums, you must first register.
Please enter your desired user 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome