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TM 5-4930-226-12&P
CHAPTER 2
OPERATING INSTRUCTIONS
WARNING
If equipment fails to operate, refer to troubleshooting procedure in Chapter 3.
Section I.
OPERATING PROCEDURES
2-1. General
a. The instructions in this section are for the in-
formation and guidance of personnel responsible for
operation of the nozzle assembly. The operator must
know how to perform every operation of which the
nozzle assembly is capable. Since nearly every job
presents a different problem, the operator may have
to vary given procedures to fit the individual job.
b. The control handle (4, fig. 1-11 is a two-posi-
tion (flow, “up” to no-flow “down”) device which
controls the flow of fuel through the nozzle. In nor-
mal operation, the handle will be in the no-flow
(down) position until the nozzle is attached to the
receiver vehicle. To commence the actual refueling
operation, the control handle latch (16) must be
pulled back allowing the control handle to be ro-
tated up to the FLOW position.
c. The actuating ring cable loop (15, fig. 1-1) is
pulled to disconnect the nozzle from the receiver on
the vehicle being refueled. In normal operation this
procedure would occur upon completion of fueling
operation after the handle (4, fig. 1-1) has been
latched in the no-flow (down) position. Emergency
disconnect during fueling operation with the handle
in flow (up) position may be accomplished in the
same manner as normal operation.
d. The red indicator pin (5) serves as a visual in-
dication of nozzle opening, closing and shutoff.
Complete extension of red indicator pin indicates
vehicle receiver shutoff resulting in a no-flow condi-
tion. Complete pin extension is indicated by end of
pin being flush with rear end of nozzle.
e. The gravity fill adapter trigger (9) operates a
valve in the gravity fill adapter which permits flow
control between full-flow and no-flow positions
when the nozzle flow control handle (4) is in the
FLOW (up) position.
2-2. Operation Of Equipment for Vehi-
cles Equipped With Closed-Cir-
cuit Refueling Receivers
a. Insert ground plug (17, fig. l-l) into vehicle,
and/or attach alligator clip (6) to unpainted metal
on vehicle. Do not attach to propeller or radio anten-
na. Nozzle and vehicle are now bonded and ground-
ed.
Grounding must be accomplished be-
fore making contact of nozzle to vehi-
cle.
b. Remove dust plug (8) from nozzle coupling
end by pulling actuating ring cable loop (15). The
stayback dogs will remain open and the actuating
ring will remain in the backward position.
c. Make certain handle (4) is latched in no-flow
(down) position, If handle is left in flow (up) posi-
tion, it may be difficult to make connection to vehi-
cle receiver due to line pressure in nozzle. It will
also result in immediate fuel flow.
d. Attach nozzle assembly to receiver on vehicle
with a straight push motion. A positive connection
is indicated by the actuating ring moving forward
with an audible “click”.
e. Unlatch handle (4) and rotate up to the flow
position to commence normal fueling procedure.
NOTE
Completion of fill is controlled by shutoff valves in
vehicle. Extension of red indicator pin (5, fig. 1-1)
indicates closure of nozzle regulator valve. The noz-
zle may cut on and off to top off tanks where vehi-
cles use multiple fuel tanks. Return handle (4) to
no-flow (down) and latched position.
f. Disconnect nozzle from receiver by pulling ac-
tuating ring (15) cable loop. Disconnect vehicle
ground cable (6) from vehicle and/or ground plug
(17). Replace dust plug assembly (8) in coupling end
of nozzle assembly.
2-3. Operation of Equipment for Vehi-
cle Not Equipped for Closed-Cir-
cuit Refueling
Grounding must be accomplished be-
2-1
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