TM 55-1520-240-23-8
10-74
INSTALL FORWARD FUEL TANK VENT VALVE
(Continued)
10-74
Do not puncture or scratch lining
of fuel tank. If lining is broken, fuel
penetrates and activates self-sealing
layers. Activated layers swell and trap
fuel. Activated green spongy material
also contaminates fuel system. This
makes it necessary to replace fuel
tank and flush fuel system.
NOTE
Four different types of forward fuel
cells are used on the helicopter. Each
is interchangeable, but has a different
assembly between valve adapter
and cell. Goodyear cells have four
bushings, FPT cells have an adapter
plate and Uniroyal cells have nothing
between adapter and cell.
2.
Working through forward access hole (1),
position shim plate (3), or four bushings (4) as
required, adapter (5) and valve (6) with port (7)
down, over drain valve (8), on floor of tank (2).
3.
Install four washers (9) and bolts (10).
4.
Connect tube (11) to port (7) of valve (6).
5.
Remove plug from hose (12). Connect hose to
valve (6).
INSPECT
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