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TM 10-4930-247-13&P
2-12. OPERATING PROCEDURES -cont.
c.
CCR Nozzle Operation. For operation of the CCR nozzle, refer to TM10-4930-248-13&P.
d.
Recirculation Nozzle Operation. The recirculation nozzle must be connected to the CCR nozzle prior to
operation. The CCR nozzle acts to prevent over-pressurizing of the HEMTT tanker by reducing system fuel
pressure.
CAUTION
Immediately drain a substantial portion of the fuel from the nozzle whenever the
valve on the hose attached to it is turned to off or the nozzle is removed from the
system. The trapped fuel can create large internal pressure that can damage the
nozzle when the temperature rises.
Recirculation Nozzle Connection. Refer to figure 2-14.
(1)
Set control handle (1) on ball valve (2) to close position.
(2)
Remove dust cover (3) from end of nozzle body (4).
(3)
Grasp handles (5) and hold end of nozzle body (4) in alinement with aircraft refueling adapter (6).
NOTE
Press nozzle body against adapter while slightly rotating the nozzle to aline the
nozzle index pins with the adapter slots.
(4)
Press nozzle body (4) against aircraft refueling adapter (6). Turn handles (5) to the right until end of nozzle
mates with aircraft refueling adapter. Continue to turn handles to the right until nozzle body locks firmly
onto aircraft adapter and contacts mechanical stops.
WARNING
Setting control lever to less than full OPEN position is unsafe and can result in a
flowing fuel disconnect and dangerous fuel spill. Make sure handle is in the full
OPEN position.
CAUTION
If control lever is not in the full OPEN position (over center), recirculation time will
increase and premature failure of nozzle and/or tanker adapter may result.
(5)
Rotate control lever (7) to full OPEN (over center) position against the internal mechanical stop.
Fuel Sampling. Refer to figure 2-14.
(6)
Verify that base of control lever (7) prevents rotation of nozzle body (4) by attempting to disengage nozzle
from aircraft refueling adapter (6).
(7)
Set CCR Nozzle (8) to OPEN. Refer to TM10-4930-248-13&P.
Change 5 2-35
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