METAL BODY REPAIR - OD1653 - LESSON 2/TASK 3
FIGURE 39. PRESSURETYPE FUEL TANK FILLER CAP.
(b) The reverse of this (paragraph 3b(3)(a)) occurs when the tank and
fuel cool. Air must be brought in from the outside to replace the area left
by the shrinking fuel. Atmospheric pressure, which is greater than the
pressure within the tank, forces the inlet vent open, allowing air to rush
into the tank. When the tank pressure equals atmospheric pressure, the air
vent closes.
(4) Fuel Pickup Connection Plate. The connection plate is manufactured
from low carbon steel, coated with lead, and soldered to the tank body. The
plate has holes drilled into it and tapped to receive the fuel line pickup
assembly which is secured in place with screws.
(5) Fuel Gage Connection Plate. Construction and method of attachment
is the same as the pickup plate.
(6) Drain Plug. The drain plug is a steel plug with pipe threads. The
drain plug fitting is manufactured from low carbon steel coated with
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