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TM 10-4930-250-13&P
4
12
Gee
3
6
9
8
7
10
Figure 1-5. Accessory Module
1.9.4.1
Fuel Hoses.
AAFARS employs two different types of fuel hoses. collapsible and non-collapsible,
figure 1-6. The only other distinction
between hoses is their size: some are two-inch, some are three-inch. All AAFARS fuel hoses are light weight, elastomer
hoses with an imbedded static wire which contacts the coupling at each end to provide electrical continuity from end to end.
All the fuel hoses are terminated in valved unisex couplings which allow isolation of any hose length in case of emergency or
failure. The unisex couplings are provided with dust caps to prevent entry of dirt or debris when any hose end is not coupled
to another hose or fitting.
The suction hoses are two-inch diameter non-collapsible hoses. Non-collapsible hoses are used to ensure a free flow of fuel
from the drums to the pump. Since the non-collapsible hoses are semi-rigid and cannot be rolled, their length is restricted to
six feet to facilitate handling, transportation and storage. Two of the non-collapsible hoses also are used for fuel
recirculation.
The fuel discharge hoses are three-inch diameter hoses to handle the volume of fuel required for four fueling points. Hose
size is reduced to two-inch diameter at the tee that supplies the fuel discharge hoses. This reduction is accomplished by
fitting a three-inch fifty-foot discharge hose with a three-inch unisex coupling at one end and a two-inch unisex coupling at
the other end. This is the only hose in the system that can be connected only one way; all others have the same termination
on either end.
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