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Broward fuel return

Discussion in 'Technical Discussion' started by libertyac, Jun 18, 2009.

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  1. libertyac, Jun 18, 2009
    #1
    libertyac

    libertyac New Member

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    Can anyone with experience of older Browards shed some light on how the fuel return system operates. On this 1982 106(stretched 96), the generator systems become pressurised when the mains are run, and since the supplies to both gensets are off, it would appear that the pressure build up is through the return.. The Stanadyne filter doesn't need much excuse to leak, but when thye gen has been running or the mains are shut down, the high pressure inn the system causes a flood of diesel. Tried Broward but it seems they have become a victim of present circumstances and Dave Gill, the original engineer on this boat, has moved on.
  2. K1W1, Jun 18, 2009
    #2
    K1W1

    K1W1 Senior Member

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    Hi,

    What engines are you running on there?
  3. libertyac, Jun 18, 2009
    #3
    libertyac

    libertyac New Member

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    Broward Return fuel lines

    We have 3412's. The returns for gens and mains are common, solid and seem to feed back into the fill system at the base of some vertical plumbing in the aft cn rs of the engine compartment, which then appears to direct upward to the fill valve manifold.We recently ran Freeport -W Palm with no issues and fill and stripping valves closed, so where the &^$3 is it going......or not
    Thanks
  4. kelpy, Jun 19, 2009
    #4
    kelpy

    kelpy New Member

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    Here is one possibility based on a Broward and a Hargrave designed Cheoy Lee.

    All of the fuel return lines are attached to a unvalved manifold that dumps into the deck side of the Fuel Fill Manifold. The fill valve on the Fuel Fill Manifold for the tank in use MUST be open to allow the fuel to return to the supply tank.
    If all of the fill valves are closed, the fill manifold will pressurize between the valve and the deck fiting and will most likely burst a hose or damage the injector pump
    If the wrong valve is open, the fuel will feed form one tank and retun to another, eventually overfilling that tank and dumping over the side through the vent.

    In other words, if you are using the center tank as your fuel supply source, the center tank fill valve on the Fuel Fill Manifold must be open as well.

    Hope this helps.
  5. libertyac, Jun 19, 2009
    #5
    libertyac

    libertyac New Member

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    Thanks Kelpy
    Makes sense as you've described it with check valves preventing fuel going the wrong way etc.
    Hopefully I won't be treated to another Diesel shower again , when I take off a fuel hose.
    Pete
    Esprit
  6. Capt Bill11, Jun 20, 2009
    #6
    Capt Bill11

    Capt Bill11 Senior Member

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    FWIW, on the one I was just running, all the returns just went back to the fwd tank individually.