Cummins Hydroboost question...need serious help?! - Diesel Forum -
General Diesel Discussion about diesels in general. All brands are welcome, please refrain from brand wars. Discussions about types of diesel fuel also go here.

LinkBack Thread Tools Display Modes
post #1 of 3 (permalink) Old 09-09-2006, 04:01 AM Thread Starter
Join Date: Jun 2004
Location: Stephenville Texas
Posts: 85
My Photos: (0)
Feedback Score: 0 reviews
Cummins Hydroboost question...need serious help?!

Alright...My buddy has 00 Dodge 3500, automatic, Cummins, 4x4. His brakes went out like he had no assist at all and it would barely took several hundred feet to stop from 70 and the pedal went all the way to the floor and didn't come back. So I put a new brake booster (hyrdroboost assembly) and a new master cylinder on it and brakes, pedal goes to the floor. I did the whole fill it with fluid turn wheels back and forth turn it off pump pedals a few times and start it...repeat...Well I repeated til I can't repeat any more and brakes. ABS light is on, BRAKE light is on (one in the gauges)...the pedals goes to the floor (making a hissing sound) and then comes back real slow. It is not leaking fluid from anywhere and we bled the brakes. Still nada. I worked on it for several hours AFTER the new parts were installed to no avail...if someone could please help me out or send me in the direction of someone that knows please let me know...hell you can even call my cell phone....I would appreciate any help ya'll can provide.


(Late)99 F-250 XL-Work Truck Special -Super Cab-4x4-6 spd-LWB-Homemade cold air-Edge Evolution-straight pipe-3inch lift-280k miles

SOLD-89 F-350 Single Cab-SRW-Banks Wastegated Sidewinder-Straight piped-5 spd-LUK clutch-Single Mass Flywheel-Isspro gauges
nostroke is offline  
Sponsored Links
post #2 of 3 (permalink) Old 09-09-2006, 12:04 PM
Senior Member
Join Date: Apr 2006
Location: Winchester,Va
Posts: 196
My Photos: (0)
Feedback Score: 0 reviews
Re: Cummins Hydroboost question...need serious help?!

Is your vacumm hoses hooked up or is it that cummins has some kind of pump I think that works off of pressure. Cant remember had a 01. Just a thought.

2006 Ford 250 4x4 crew cab short bed auto
front windows 20% and back factory with 35%
auto meter gauges
4inch exhaust
JasonBarhorst is offline  
post #3 of 3 (permalink) Old 09-09-2006, 02:19 PM
Senior Member
Join Date: Sep 2006
Posts: 139
My Photos: (0)
Feedback Score: 0 reviews
Re: Cummins Hydroboost question...need serious help?!

Uh I think you have to love these new computor controled vehicles.
Best my pea brain can remember you have to take it to the dealer for some kind of special bleeding proceedure to get the abs and proportioning vales set back to there preferd settings.
I say this because the Grand Cherokee"s were like this.
Alot did there own brake work like you did then had them towed in to get bled.
amunderdog is offline  
Sponsored Links

  Diesel Forum - > Other Topics > General Diesel

Quick Reply

Register Now

In order to be able to post messages on the 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:
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:


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
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