Mallory Ignition ACCEL Digital Fuel Injection Engine Management System 74030 - Manual (Page 19)

17
ACCEL/DFI
SENDING UNIT MODIFICATIONS
To install a return line in your tank, remove the sender
assembly from the fuel tank and drill a 5/16” hole through
the top of the flange. Be sure to give yourself enough room
to weld the tube into place, welding procedures are
discussed later in this section. ACCEL DFI jumper line kit,
part number 74731, will supply you with this line as well as
other lines that you may need. Pre-bend a piece of 5/16”
fuel line so that the in-tank portion end is 2” from the
bottom of the tank and away from existing outlet tubes (See
figure at the end of this section). Ensure that the installation
of this tube does not interfere with any other components
on the tank unit. Clean the unit with soap and water prior
to the next step. Seal and secure the return line to the flange
by welding or brazing with low heat so that flange warpage
does not occur. Also make sure that applied heat does not
damage the sending unit wires or wire seals. Clean the
welded area and check for cracks or holes in the flange,
tubes or welded area.
Check the condition of the filter sock on the pick-up tube.
If the sock is torn or contaminated, replace it. Again, if you
are not using a filter sock in your application then install a
filter between the fuel tank supply line and the inlet side of
your fuel pump.