Aux Fuel Tank

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  • kevkon
    3rd Gear
    • Aug 2009
    • 364

    Aux Fuel Tank

    Anyone out there using an aux fuel tank under the drivers seat on a swb ? Did Lr ever offer this on a swb?
    Also, anyone using the LR aux fuel valve?
    94 D-90 tdi
    72 Series III
  • siiirhd88
    3rd Gear
    • Oct 2006
    • 360

    #2
    I have an aux underseat tank in the wife's 109, using a military style tank. I use individual electric fuel pumps for each of its three fuel tanks. My 109 has an underseat tank in addition to its rear tank. I use a marine fuel tank selector valve to select between tanks, and have a fuel gauge for each tank. The Series fuel selector valve that I used previously was always a slow leaker, dueto its cork wafer seal getting old and brittle.

    Bob

    Comment

    • TJR
      2nd Gear
      • Dec 2006
      • 279

      #3
      I'm still arranging mmy 88 ser 3 to have dual tanks, though I never liked the military under seat filler arrangment. The thought of spilt gas inside the cab was enough to push me to using a stock tank with an added external filler basically mimicking the other side.



      My old ford bronco had dual tanks and I loved that feature, though at least the fillers were on the same side.

      some good info and pics here..





      ..TJR

      Comment

      • kevkon
        3rd Gear
        • Aug 2009
        • 364

        #4
        Yeah, I have the military underseat filler and fuel tank selector valve. Was this a common option?
        94 D-90 tdi
        72 Series III

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        • gregh
          Low Range
          • Jan 2007
          • 3

          #5
          second fuel tank

          I installed mine using Terriann's instructions.
          Worked great!! The fuel lever I got from a boating supply store and I just installed a switch to move between the two fuel sending units.

          Comment

          • kevkon
            3rd Gear
            • Aug 2009
            • 364

            #6
            Did Lr dealers ever install these as optional equipment?
            94 D-90 tdi
            72 Series III

            Comment

            • kevkon
              3rd Gear
              • Aug 2009
              • 364

              #7
              Has anyone using the ex MOD aux tank added a vent to the exterior? Wondering if the lack of has caused vapor lock or worse.
              94 D-90 tdi
              72 Series III

              Comment

              • greenmeanie
                Overdrive
                • Oct 2006
                • 1358

                #8
                Originally posted by kevkon
                Has anyone using the ex MOD aux tank added a vent to the exterior? Wondering if the lack of has caused vapor lock or worse.
                The vent should be part of the cap on a military truck.

                Comment

                • kevkon
                  3rd Gear
                  • Aug 2009
                  • 364

                  #9
                  I know. That's what bothers me.
                  94 D-90 tdi
                  72 Series III

                  Comment

                  • scott
                    Overdrive
                    • Oct 2006
                    • 1226

                    #10
                    i put in a regular tank under my seat. plan is to have a custom muffle guy weld a reducer on the end of a filler tube so that i can get some flexable gas tank fill hose from the local auto parts store and the cut the tub and install all those parts. but mean while i put a "T" in the primary tank vent tube and plumbed the aux vent tube into the "T". i found a black rubber pipe cap at the hardware store that fits so tight that it's a bear to get off. fumes aren't too bad but i've got the doors off and the sides of my canvas rolled up
                    '64 Series IIA 88 Canvas Tilt
                    '68 Series IIA RHD Ambulance
                    '76 Spitfire 1500
                    '07 LR3 (Series Recovery Vehicle)

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