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99 Classic Xl Brake Problem

Discussion in 'Trucks [ Eighteen Wheelers ]' started by Puller810, Dec 1, 2011.

Page 1 of 2
  1. Dec 1, 2011 #1
    Puller810

    Puller810 Bobtail Member

    32
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    Jan 17, 2011
    Michigan
    0
    I have a 99 Classic Xl. Brakes started sticking on when pressing the foot pedal, it wouldn't release the air pressure. In the morning the pedal would be really hard to depress then it would break free. I changed the foot valve thinking it was bad and just tried it this morning. Same thing after messing with it you can get the brakes to release and the pedal will come back. Any ideas would be appreciated!
     
    Puller810, Dec 1, 2011
    Puller810, Dec 1, 2011
    #1
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  3. Dec 1, 2011 #2
    heyns57

    heyns57 Road Train Member

    2,209
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    near Kalamazoo Speedway
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    Are your air dryer and spitter valve working? Temps below 30 have arrived in Michigan.
     
    heyns57, Dec 1, 2011
    heyns57, Dec 1, 2011
    #2
  4. Dec 1, 2011 #3
    Pablo-UA

    Pablo-UA Road Train Member

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    check accelerating valve.
     
    Pablo-UA, Dec 1, 2011
    Pablo-UA, Dec 1, 2011
    #3
  5. Dec 1, 2011 #4
    Puller810

    Puller810 Bobtail Member

    32
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    Jan 17, 2011
    Michigan
    0
    Air dryer is working along with the splitter.

    Pablo, where is the valve you are talking about located?

    Thanks for the help!
     
    Puller810, Dec 1, 2011
    Puller810, Dec 1, 2011
    #4
  7. Dec 1, 2011 #5
    bender

    bender Road Train Member

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    Jul 20, 2010
    Don't Kid Yourself
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    Brake pedal pivot or actuator piston froze or packed with dirt and grime.
     
    bender, Dec 1, 2011
    bender, Dec 1, 2011
    #5
    heyns57 Thanks this.
  8. Dec 1, 2011 #6
    Puller810

    Puller810 Bobtail Member

    32
    15
    Jan 17, 2011
    Michigan
    0
    I was hoping I wouldn't have to tear the dash a part but I think it might be that.
     
    Puller810, Dec 1, 2011
    Puller810, Dec 1, 2011
    #6
  9. Dec 1, 2011 #7
    JohnP3

    JohnP3 Road Train Member

    1,594
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    Feb 21, 2010
    Rock Creek B.C. Canada
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    You have to remove the foot pedal. either pull the pin or remove the complete assembly, sand and clean all the parts. I lube with luberplate, and reassemble.
     
    JohnP3, Dec 1, 2011
    JohnP3, Dec 1, 2011
    #7
  10. Dec 1, 2011 #8
    Pablo-UA

    Pablo-UA Road Train Member

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    Oct 11, 2010
    Borispol, Ukraine
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    This valve in on frame x-member. You got the truck with Early Bosch ABS (and Knorr/Bendix brake system). So no accelerating abs valves were used and they used to put one accelerating valve on frame x-member in fifth wheel area.

    It may look differently, but usually like this
    [​IMG]

    But sometimes they do not install it.

    One more hypotesa - pedal pin is rusty and when you release the pedal pins stays stuck.
     
    Pablo-UA, Dec 1, 2011
    Pablo-UA, Dec 1, 2011
    #8
  11. Dec 1, 2011 #9
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
    1,640
    Oct 11, 2010
    Borispol, Ukraine
    0
    Ouh, ATC valve... (ASR valve in Europe). Faulty valve may brake rear wheels.
     
    Pablo-UA, Dec 1, 2011
    Pablo-UA, Dec 1, 2011
    #9
  12. Dec 1, 2011 #10
    Puller810

    Puller810 Bobtail Member

    32
    15
    Jan 17, 2011
    Michigan
    0
    I will look at it tomorrow thanks for the ideas guys.
     
    Puller810, Dec 1, 2011
    Puller810, Dec 1, 2011
    #10
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