Chapter 1
Understanding the Operation of the Trax-UFS Fuel Tank System
Q — What is included in the Transfer Flow auxiliary fuel system kit?
A — e Transfer Flow system includes an auxiliary fuel tank, an auxiliary fuel pump,
all mounting hardware, and all necessary fuel lines for a complete installation. e
Transfer Flow system also includes a computer control module and a Liquid Crystal
Display (LCD).
Q — How does the auxiliary system operate?
A — e operation of the Transfer Flow fuel system is actually quite simple. For example,
say you have two tanks on your vehicle (the OEM tank and the Transfer Flow auxiliary
tank). e Transfer Flow system essentially feeds fuel into the vent tube of the OEM
tank by way of the Transfer Flow fuel pump. As the vehicle uses fuel from the OEM
tank, the Transfer Flow system pumps fuel into the OEM tank to keep both tanks at the
same level.
Q — How often does the Transfer Flow tank fill the OEM tank?
A — e Transfer Flow computer module monitors the fuel level in both fuel tanks. e
control module basically keeps the tanks at the same level by transferring several gallons at
a time. Typically, the transfer occurs after 3 to 5 gallons have been used out of the main
tank. For more detailed transfer information for your specific vehicle, call Transfer Flow
at 1-800-442-0056 or (530) 893-5209.
Q — I typically keep trucks for one or two years and then get a new one. Do I need
to buy a new Transfer Flow auxiliary fuel system each time?
A — It depends on the truck you are buying. If you had a diesel pickup and bought a
new diesel pickup (or from a gas pickup to another gas pickup), we would just reprogram
your module for a small fee. If you change from a diesel to a gas or a gas to a diesel, there
may be other components, plus reprogramming the module, that would be required.
Q — What if the Transfer Flow system develops a problem? Does that mean my
vehicle cannot be driven until it is fixed?
A — No! If a problem develops with the Transfer Flow auxiliary fuel system, simply
locate the fuse holder on the Transfer Flow computer module (this black box should be
located against the cowling or firewall). Remove the fuse from the module. e system
will now operate from the OEM tank only, just as though the Transfer Flow system was
never installed. e OEM fuel gauge will read only the OEM tank. Fuel will not transfer
from the auxiliary tank to the OEM tank if the fuse is removed.
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