Diesel Bombers

12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

My brakes are starting to scare me. Any help?

Thread Tools
 
Search this Thread
 
  #1  
Old 04-12-2010, 11:23 AM
justinb12's Avatar
Diesel Enthusiast
Thread Starter
Join Date: Feb 2010
Location: Willis, Texas
Posts: 178
Likes: 0
Received 4 Likes on 4 Posts
Default My brakes are starting to scare me. Any help?
The problem is that i can pump them up and hold steady pressure and they will eventually fall all the way to the floor. No leaks, fresh pads and decent fluid. So what is happening? I understand how it works just not this.
 
Reply Like
  #2  
Old 04-12-2010, 11:30 AM
diesel pap's Avatar
Site Sponsor - Mighty Diesel
Join Date: Dec 2008
Location: West Virginia
Posts: 4,184
Received 213 Likes on 200 Posts
Default
are you back in wv working yet
 
Reply Like
  #3  
Old 04-12-2010, 11:31 AM
justinb12's Avatar
Diesel Enthusiast
Thread Starter
Join Date: Feb 2010
Location: Willis, Texas
Posts: 178
Likes: 0
Received 4 Likes on 4 Posts
Default
Soon i hope. you know about this brake problem?
 
Reply Like
  #4  
Old 04-12-2010, 11:41 AM
diesel pap's Avatar
Site Sponsor - Mighty Diesel
Join Date: Dec 2008
Location: West Virginia
Posts: 4,184
Received 213 Likes on 200 Posts
Default
brians shop would know.
 
Reply Like
  #5  
Old 04-12-2010, 03:06 PM
monster12valve's Avatar
Diesel Bomber
Join Date: Sep 2009
Location: willowick, ohio
Posts: 1,355
Received 47 Likes on 44 Posts
Default
wheel cylinder

---AutoMerged DoublePost---

pull the rear tires off and pull the drums.... bet u have a leaker
 
Last edited by monster12valve; 04-12-2010 at 03:06 PM. Reason: Automerged Doublepost
Reply Like
  #6  
Old 04-12-2010, 04:00 PM
85_305's Avatar
Being Evaluated
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,905
Received 15 Likes on 14 Posts
Default
ya either a wheel cylinder or maybe there is an issue with your hydroboost? Are the vac lines all good?
 
Reply Like
  #7  
Old 04-12-2010, 05:05 PM
440ctd's Avatar
Diesel Enthusiast
Join Date: Oct 2009
Location: cleveland
Posts: 133
Received 5 Likes on 5 Posts
Default
could be problem with the internals of the master or rear brake cylinders
 
Reply Like
  #8  
Old 04-12-2010, 05:16 PM
DixonPeer's Avatar
Diesel Fan
Join Date: Dec 2009
Location: Summit, New Jersey
Posts: 91
Likes: 0
Received 6 Likes on 5 Posts
Default
What the hell is a "hydroboost"? Hydro would mean water, so I don't get it.

Anyway, sounds like a leak somewhere. Did you bleed the brakes lines (get any air out of lines)?

---AutoMerged DoublePost---

Well, here's an article that explains "hydroboost": Installing A Hydroboost Brake System on a Chevy
 
Last edited by DixonPeer; 04-12-2010 at 05:16 PM. Reason: Automerged Doublepost
Reply Like
  #9  
Old 04-12-2010, 05:17 PM
justinb12's Avatar
Diesel Enthusiast
Thread Starter
Join Date: Feb 2010
Location: Willis, Texas
Posts: 178
Likes: 0
Received 4 Likes on 4 Posts
Default
me and my brother checked lines, mastercylinder, front leaks and rear. Found nothing. must be something internal.
 
Reply Like
  #10  
Old 04-12-2010, 05:24 PM
85_305's Avatar
Being Evaluated
Join Date: Feb 2010
Location: Buffalo, NY
Posts: 1,905
Received 15 Likes on 14 Posts
Default
You sure you checked the master cylinder and not just the brake fillup? I'm pretty sure '96 had hydroboost
 
Reply Like



Advanced Search
Quick Reply: My brakes are starting to scare me. Any help?


Reply Closed Thread Share

All times are GMT -5. The time now is 11:58 AM.