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N14 jake brake issue

Discussion in 'Trucks [ Eighteen Wheelers ]' started by MJ1657, Jan 17, 2016.

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  1. Jan 17, 2016 #1
    MJ1657

    MJ1657 Road Train Member

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    Isanti, MN
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    '00 KW W900L N14

    Yesterday my jakes started acting up. Let off the throttle and jakes come on as normal. Get back into the throttle and they stay on but act like they are on medium or low not on high where I have them set. They do not shut off with the dash switch when they do this. Only way to get them to shut off is to press the accelerator and increase the rpms. You can hear them gradually taper off when you do this.
    Any ideas?
     
    MJ1657, Jan 17, 2016
    MJ1657, Jan 17, 2016
    #1
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  3. Jan 17, 2016 #2
    Heavyd

    Heavyd Road Train Member

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    Solenoid are sticking.
     
    Heavyd, Jan 17, 2016
    Heavyd, Jan 17, 2016
    #2
    Aminaz, wore out and MJ1657 Thank this.
  4. Jan 17, 2016 #3
    MJ1657

    MJ1657 Road Train Member

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    Usually need replacement or is it something that can work itself out?
     
    MJ1657, Jan 17, 2016
    MJ1657, Jan 17, 2016
    #3
  5. Jan 17, 2016 #4
    boneebone

    boneebone Road Train Member

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    It's probably a broken Inner Spring, you will need to replace Spring.
     
    boneebone, Jan 17, 2016
    boneebone, Jan 17, 2016
    #4
    MJ1657 Thanks this.
  7. Jan 17, 2016 #5
    Cory wood

    Cory wood Medium Load Member

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    Sounds like it's fine to rebuild jakes and replace the solenoids
     
    Cory wood, Jan 17, 2016
    Cory wood, Jan 17, 2016
    #5
    MJ1657 Thanks this.
  8. Jan 17, 2016 #6
    BoxCarKidd

    BoxCarKidd Road Train Member

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    It's not self correcting. Pull the three wires off the jake housing's and connect a hot wire to them one at a time to isolate which valve cover to take off. Watch oil flow change from top of slave piston housing, when wire is removed or hand is taken off center of solenoid. If one stops dumping oil the other is bad. If both keep dumping oil the solenoid is bad. C-brakes used to have a lot of problems with springs breaking and spools sticking in the slave valve housing. Use emery cloth intell spool will slide up and down with a pocket magnet. do the bore also. Hardest part is don't drop stuff in the engine.
     
    BoxCarKidd, Jan 17, 2016
    BoxCarKidd, Jan 17, 2016
    #6
    MJ1657 and blairandgretchen Thank this.
  9. Jan 17, 2016 #7
    MJ1657

    MJ1657 Road Train Member

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    It's OK to run the truck just leave the jakes off right?
     
    MJ1657, Jan 17, 2016
    MJ1657, Jan 17, 2016
    #7
  10. Jan 17, 2016 #8
    Cory wood

    Cory wood Medium Load Member

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    Yes should be fine
     
    Cory wood, Jan 17, 2016
    Cory wood, Jan 17, 2016
    #8
    MJ1657 Thanks this.
  11. Jan 17, 2016 #9
    MJ1657

    MJ1657 Road Train Member

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    Isanti, MN
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    Thanks alot guys. I'll get it checked out.
     
    MJ1657, Jan 17, 2016
    MJ1657, Jan 17, 2016
    #9
  12. Jan 29, 2016 #10
    MJ1657

    MJ1657 Road Train Member

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    Isanti, MN
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    Just got the truck back. It had a broken spring. They got a Jake kit and fixed it.
     
    MJ1657, Jan 29, 2016
    MJ1657, Jan 29, 2016
    #10
    Heavyd Thanks this.
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