(Or GU with no sub tank
)I stumbled across an aussie thread where they mention connecting the main tank’s breather(inlet?) pipe to the sub tank. This creates a vucume inturn sucks the fuel from the sub tank to the main.
I have no idea how the mechanics of the main tank work with regards to piping and breathers etc, so find this quite interesting.
From patrol4x4:
“I have a long ranger ta35 , 70 litre sub tank that is still available from them .
It sits along the tailshaft on the drivers side.
It simply uses the vacuum in the main tank to draw it from the tank into the original
It uses a normal cap but is filled with epoxy to seal it.At the fill point you fill the tanks seperately .
stay with me on this, sounds not simple but it is ,kinda
You have only 1 normal fuel gauge, two fillers , no pump,no valves.
.Say you have a full tank in your normal 95 litre tank and you add 50 litres to your sub. as you draw the first 50 off your normal tank its replaced with the 50 from the sub. So your fuel gauge just reads full untill it starts to feed off the original 95 litres tank.if your sub is empty everything acts normal, gauge matchs 95 litre tank etc
if sub is full and 95 litre full i can drive for about 600 kms before gauge moves and i still have about 600 safely left, with a margin left to get more.
see i told you it sounds not simple but is! haha”
Am my correct by saying that the fuel cap allows air to be sucked in for this setup to work the fuel cap must be airtight?
Or is there other breathers involved?
