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Air Leak out the service glad hand

Discussion in 'Freightliner Forum' started by Charles13, Oct 11, 2011.

  1. Oct 11, 2011 #1
    Charles13

    Charles13 Bobtail Member

    3
    0
    Oct 11, 2011
    0
    Hello everyone' I have this FreightLiner 2004 FL70.

    My problem is when ever brakes are apply' air leaks out the service glad hand dumping alot of air out fassst.I was thinking maybe is my Tractor Protection Valve, but im not sure? Can any one here help me, any help i will apreciate thanks in advance.
     
    Charles13, Oct 11, 2011
    Charles13, Oct 11, 2011
    #1
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  3. Oct 11, 2011 #2
    notarps4me

    notarps4me Road Train Member

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    Have you checked the rubber grommet?
     
    notarps4me, Oct 11, 2011
    notarps4me, Oct 11, 2011
    #2
  4. Oct 11, 2011 #3
    dibstr

    dibstr Road Train Member

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    Sep 10, 2010
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    Need more info, but if your trailer air supply is closed (Usually red button out) and you apply service brakes to the tractor (With park brake released) and air escapes through the service line then the tractor protection valve is a good bet.
     
    dibstr, Oct 11, 2011
    dibstr, Oct 11, 2011
    #3
  5. Oct 11, 2011 #4
    dirtyrabbit

    dirtyrabbit Medium Load Member

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    Jun 19, 2011
    KS
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    My yellow button gave way right there in the cab. Yea, that will make you come off the seat. The bad part of that situation was the red one gave out 40 miles down the road after that. Two service calls in one morning was expensive and a pain in my arse.

    If your rubber seals are good, don't wait for it to really go bad. Get it checked out ASAP.
     
    dirtyrabbit, Oct 11, 2011
    dirtyrabbit, Oct 11, 2011
    #4
  7. Oct 12, 2011 #5
    Charles13

    Charles13 Bobtail Member

    3
    0
    Oct 11, 2011
    0


    Its not my glad hand rubber grammet thanks anyways.

    But with the truck stopped and trailer disconnected from tractor.
    And i step on the brake pedal air excapes out the service glad hand wich is in back of the truck on the frame. Causing air loss. Wher is the location to the Tractor Protection Valve?

    Thanks guys i really appreciate all of the help.:yes2557:
     
    Charles13, Oct 12, 2011
    Charles13, Oct 12, 2011
    #5
  8. Oct 12, 2011 #6
    dibstr

    dibstr Road Train Member

    1,308
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    Sep 10, 2010
    Mississippi
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    Depends on the truck, but just follow the air lines back. The airlines usually (But not always) connect directly to the T/P valve.
     
    dibstr, Oct 12, 2011
    dibstr, Oct 12, 2011
    #6
  9. Oct 12, 2011 #7
    Pablo-UA

    Pablo-UA Road Train Member

    7,604
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    Oct 11, 2010
    Borispol, Ukraine
    0
    FL70 Trailer valve may be in rear end of truck if it is truck + draw bar trailer and under cabin on left if it is fifth wheel trucktor, like on Century class ore Columbia.
     
    Pablo-UA, Oct 12, 2011
    Pablo-UA, Oct 12, 2011
    #7
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