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Fuel Tank Selector?

Discussion in 'Freightliner Forum' started by Johnsf, Mar 11, 2013.

  1. Mar 11, 2013 #1
    Johnsf

    Johnsf Bobtail Member

    7
    0
    Apr 5, 2012
    San Francisco, CA
    0
    Hello,

    1999 Freightliner FL70 box truck with 3126B Cat engine. Has two 30 gal fuel tanks. Only one tank has a fuel sender for a single gauge in dash. Tank selector looks like just two brass tees. No mechanical or electrical valves. Each tee has one line to each tank and one to the engine. I assume one tee assembly is for fuel feed and the other is for fuel return. How is this system supose to work?

    SDC10047 sml.jpg SDC10289 sml.JPG
     
    Johnsf, Mar 11, 2013
    Johnsf, Mar 11, 2013
    #1
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  3. Mar 11, 2013 #2
    GrapeApe

    GrapeApe Road Train Member

    2,215
    2,211
    Jan 7, 2013
    0
    There is no selector, that is a dual draw system. It siphons from both tanks and returns to both tanks. The suction line should have a regular tee fitting. The return line should have a splitter valve, which is also a tee fitting, but has reed valves in it. It's aluminum and looks similar to a tee, but has 4 screws holding a cover on it.

    Here is some info on the dual draw system:
    http://www.gtdev.com/products/trouble_returnsplit.pdf
     
    GrapeApe, Mar 11, 2013
    GrapeApe, Mar 11, 2013
    #2
    Johnsf and scottied67 Thank this.
  4. Mar 11, 2013 #3
    Johnsf

    Johnsf Bobtail Member

    7
    0
    Apr 5, 2012
    San Francisco, CA
    0
    Thanks GrapeApe, all is clear to me now.
     
    Johnsf, Mar 11, 2013
    Johnsf, Mar 11, 2013
    #3
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