Truckers Report Jobs

Find Trucking Jobs

Company Driver Company Driver Dry Van Dry Van Flatbed Flatbed Refrigerated Refrigerated Specialized Specialized Owner Operator Owner Operator
More Trucking Job Searches ⌄ Fewer Trucking Job Searches
⌃

07 International 4300/Durastar Hydraulic brake problems.

Discussion in 'International Forum' started by JMBTOW, Oct 22, 2015.

Page 1 of 2
  1. Oct 22, 2015 #1
    JMBTOW

    JMBTOW Bobtail Member

    4
    3
    Oct 5, 2015
    0
    What creates the hydraulic pressure for the brakes? I read somewhere that it makes pressure through the powersteering pump.So with that logic I assume if I have powersteering that should elminate the brake pressure issue? I know this system has an auxilliary ABS pump 1 and ABS pump 2 that turns on when you hit the pedal even when the truck is off and that does sound off on my truck. My problem is that I am getting a brake warning light and brake pressure light, and the pedal is soft and goes to floor way to easily like theres no pressure. These issues happend after a line cracked and almost all of the brake fluid drained out of the system. I'm thinking its the master cylinder or brake booster. Any help would be appreciated.
     
    JMBTOW, Oct 22, 2015
    JMBTOW, Oct 22, 2015
    #1
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. Oct 22, 2015 #2
    lots of character

    lots of character Road Train Member

    1,031
    1,813
    Aug 12, 2015
    0
    Assuming you bled it, master cylinder is where I'd start
     
    lots of character, Oct 22, 2015
    lots of character, Oct 22, 2015
    #2
    truckon Thanks this.
  4. Oct 23, 2015 #3
    baha

    baha Road Train Member

    4,137
    2,834
    Jul 25, 2013
    ga
    0
    The hydro/brake booster has a holding bottle that will let you have 2 or 3 brake use with eng. off it can be hard to bleed if its bad so a new one not rebuilt one should be instaled if you cant get it bled out?
     
    baha, Oct 23, 2015
    baha, Oct 23, 2015
    #3
    mobilerepairboise Thanks this.
  5. Nov 1, 2015 #4
    JMBTOW

    JMBTOW Bobtail Member

    4
    3
    Oct 5, 2015
    0
    Update, Ended up bleeding it out again and after a while found there was no pressure going to the front brakes. Ended up being air in the master cylinder. After bleeding that for a while I was able to get everything back in order. Thanks.
     
    JMBTOW, Nov 1, 2015
    JMBTOW, Nov 1, 2015
    #4
    lots of character, truckon and Heavyd Thank this.
  6. Nov 12, 2021 #6
    Phxgoodhelptruck

    Phxgoodhelptruck Bobtail Member

    1
    0
    Nov 12, 2021
    0
    I have 2007 international 4300 466

    Hydro breaks

    My break light is on and the Abs light is on and it’s chiming.

    My break peddle feels normal and it breaks just fine. Was told the rear pump is out. But I can hear the pumps when it press the break when the truck is of and the key is in.

    How would I know if the rear pump is off
    Or any suggestions to text them or what should I do?
     
    Phxgoodhelptruck, Nov 12, 2021
    Phxgoodhelptruck, Nov 12, 2021
    #6
  7. Oct 3, 2022 #6
    jhawk419

    jhawk419 Bobtail Member

    5
    0
    Oct 3, 2022
    0
    phxgoodhelptruck, were you ever able to figure out your issue? My 07 4300 is doing the exact thing. Ive replaced front rotors and pads and master cylinder. now im not getting fluid to the rear of the truck
     
    jhawk419, Oct 3, 2022
    jhawk419, Oct 3, 2022
    #6
  8. Oct 3, 2022 #7
    Flint1

    Flint1 Road Train Member

    1,107
    9,466
    Sep 4, 2019
    Alberta
    0
    Sounds like the wabco full power hydraulic brakes....

    Master cylinder is a hydraulic pilot input to the pump valve assembly. The HCU has no servicable parts, has to be serviced as an assembly.
    When bleeding its best to use a pressure bleeder.
    Without having a scan performed, your shooting in the dark.

    The manual is a free download. Here is a link.
    Review the section on bleeding, quite the process.

    https://www.google.ca/url?sa=t&sour...UQFnoECBIQAQ&usg=AOvVaw171S7W3oINbdWS4IH3Ef0j
     
    Flint1, Oct 3, 2022
    Flint1, Oct 3, 2022
    #7
  9. Oct 4, 2022 #8
    jhawk419

    jhawk419 Bobtail Member

    5
    0
    Oct 3, 2022
    0
    thank you, so do i have to have the software in oder to do this?
     
    jhawk419, Oct 4, 2022
    jhawk419, Oct 4, 2022
    #8
  10. Oct 4, 2022 #9
    Flint1

    Flint1 Road Train Member

    1,107
    9,466
    Sep 4, 2019
    Alberta
    0
    I have a bluepoint nexus IQ to scan codes.
    Any scanner that will read abs codes should give you a starting point.
    There is diag charts by code in the manual link I sent.
     
    Flint1, Oct 4, 2022
    Flint1, Oct 4, 2022
    #9
  11. Oct 5, 2022 #10
    jhawk419

    jhawk419 Bobtail Member

    5
    0
    Oct 3, 2022
    0
    thank you
     
    jhawk419, Oct 5, 2022
    jhawk419, Oct 5, 2022
    #10
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

    • Page 1 of 2