TM 10-4930-351-14
0007 00
DEFUELING PROCEDURE (Continued)
d.
Connect suction hose (17) removed from fuel transfer pump (1) inlet to the defueling unisex coupling (18) and the
unisex coupling (19) on the flow side of the auxiliary pump (20). Open unisex coupling valves.
e.
Connect discharge hose (10) to auxiliary pump (20) and open unisex coupling valves.
f.
Connect auxiliary power cable to auxiliary pump (20).
g.
Open liquid fuel filter-separator (14) manual vent valve.
h.
Turn on auxiliary pump (20) to pump down liquid fuel filter-separator (14) and 3 in. x 6 ft discharge hose (21) from
fuel transfer pump (1).
i.
Close liquid fuel filter-separator (14) inlet valve and manual vent valve when air is seen in the sight gauge.
j.
Turn off auxiliary pump (20), and close auxiliary pump unisex inlet and outlet valves.
k.
Remove the recirculation manifold (16) from the filter-separator and place flat on ground.
l.
Disconnect discharge hose (10) from auxiliary pump (20) and connect to recirculation manifold full flow unisex
coupling (11).
m. Disconnect suction hose (17) from auxiliary pump (20) and liquid fuel filter-separator (14).
5.
Defuel system fuel hoses. (Refer to figure 11.)
NOTE
Auxiliary pump must be physically supported in the following steps.
a.
Select a fuel drum (2) to defuel into.
b.
At selected fuel drum (2), close inlet elbow valve (3) and unisex coupling valve on discharge hose (4), disconnect
discharge hose (4) from inlet elbow valve (3), connect the discharge hose (4) to the flow side (5) of auxiliary pump
(1), and open unisex coupling valves on flow side (5) of auxiliary pump and discharge hose (4).
c.
Connect auxiliary pump (1) unisex coupling to inlet elbow valve (3) unisex coupling, and open unisex coupling
valve and inlet elbow valve (3).
d.
Close the fuel drum inlet elbow valve couplings (6) on the remaining drums (7).
WARNING
The AAFARS suction and recirculation hoses are connected to the fuel drums via elbow
valves with integral camlock couplers. When the elbow valve coupling is closed, the valve
stem is extended; when open, it is retracted. The stem travel is opposite that of conventional
valves and requires the operator to double check valve position during system set up and
tear down, since observation can be misleading. Failure to heed this warning could result in
death or serious injury.
e.
Turn on auxiliary pump (1).
0007 00-30
