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Freightliner FLD brakes feel mushy

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by golfnut34, Oct 30, 2019.

  1. Oct 30, 2019 #1
    golfnut34

    golfnut34 Bobtail Member

    10
    3
    Oct 25, 2019
    0
    The brakes on my 2003 FLD have started feeling very mushy and don't engage until the pedal is depressed a long ways. I know that is a very scientific description! Also, my engine brake is set to come on with the brakes and it seems I really have to press hard for it to engage. My dealer adjusted the brakes before harvest. Is this signs of bad brakes or a bad foot valve?
     
    golfnut34, Oct 30, 2019
    golfnut34, Oct 30, 2019
    #1
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  3. Oct 30, 2019 #2
    Ridgeline

    Ridgeline Road Train Member

    22,649
    120,842
    Dec 18, 2011
    Michigan
    0
    Change your treadle valve.
     
    Ridgeline, Oct 30, 2019
    Ridgeline, Oct 30, 2019
    #2
  4. Oct 30, 2019 #3
    golfnut34

    golfnut34 Bobtail Member

    10
    3
    Oct 25, 2019
    0
    I removed the treadle valve yesterday to see how it worked. The "needle" that goes through the firewall from the pedal into the valve is loose. Is it supposed to be that way?
     
    golfnut34, Oct 30, 2019
    golfnut34, Oct 30, 2019
    #3
  5. Oct 31, 2019 #4
    Working2party

    Working2party Medium Load Member

    608
    729
    Feb 10, 2018
    Kansas
    0
    I’ve ran into this before once where the drums swelled and the brake pads looked good from the outside, but when you looked into the drum down the edge of the pad, you’ll see the taper in the pad. When you remove the drum you’ll find the pad is riding on the rivets.

    I of course replaced almost every valve on the truck before I figured it out. So it might not hurt for you to take a good close look at your brakes shoes, before you start buying parts or paying a Mechanic lots of times to keep over looking them... sometimes, it takes a very close look to find it without removing the tires and drums, which makes it often overlooked..
     
    Working2party, Oct 31, 2019
    Working2party, Oct 31, 2019
    #4
    Goodysnap Thanks this.
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