Builds 1997 FZJ80 to HDJ80 1HD-FTE + H152F (1 Viewer)

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Oh yeah, most of the parts are NLA so we just made them to make it work as Toyota intended.

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Cheers
 
What is the extended knob?
There's an LRA auxiliary tank installed on this Cruiser. Instead of using the Y-pipe filler that LRA provides with the tank, @SNLC used the OEM filler neck and valve that comes equipped on Land Cruisers with OEM sub-tank. The extended knob is to select the oem tank or auxiliary tank while fueling. To be clear, the knob selects which tank you are filling, not which tank the engine is getting fuel from.

As I understand, the pull knob works a flapper valve in the filler neck to either send fuel to the main tank or aux tank.
 
Correct, it's a diversion door. You pull the knob upward to fuel the sub. Down for the main. The door does not completely block the main when the sub is selected. If using the sub you need to fill it first, then the main. If you fill the main first it is a struggle to fill the sub.

When filling a factory sub (~13 gallon capacity) it will bleed roughly 2 gallons into the main during that process.
 
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There's an LRA auxiliary tank installed on this Cruiser. Instead of using the Y-pipe filler that LRA provides with the tank, @SNLC used the OEM filler neck and valve that comes equipped on Land Cruisers with OEM sub-tank. The extended knob is to select the oem tank or auxiliary tank while fueling. To be clear, the knob selects which tank you are filling, not which tank the engine is getting fuel from.

As I understand, the pull knob works a flapper valve in the filler neck to either send fuel to the main tank or aux tank.
Thank you; great explanation.
Correct, it's a diversion door. You pull the knob upward to fuel the sub. Down for the main. The door does not completely block the main when the sub is selected. If using the sub you need to fill it first, then the main. If you fill the main first it is a struggle to fill the sub.

When filling a factory sub (~13 gallon capacity) it will bleed roughly 2 gallons into the main during that process.
This is great info. “Ticks of the trade”, if you will.
 
Here is an NOS fuel door information label:
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