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stopping the fuel flow into the tank.
2-15-10. Single Point Pressure Refueling.
a. Electrical ground — Connect electrical ground
from refueling aircraft. Check that the ground wire from
each ERFS II tank is connected to an aircraft ground
receptacle.
b. Fuel hose from refueling source — Connect to
aircraft single-point pressure refueling connection.
c. Single-Point Pressure Refueling Hose
Assembly - Unisex valve at the ERFS II tank — OPEN.
d. Manual FUEL/DEFUEL VALVE at each tank assembly
— OPEN.
e. REFUEL STA switch located on the overhead
FUEL CONTR Panel — ON.
f. REFUEL VALVE switch on the ERFS II Fuel Control
Panel OPEN. IN TRANSIT light will briefly illuminate
g. Refuel the ERFS II tanks. Fuel flow will automatically
stop when tanks are full.
h. FUEL QUANTITY switch — Set to 1, 2, 3, and
TOTAL to confirm tanks and system contain desired fuel
quantities.
i. REFUEL VALVE switch. — CLOSE. IN TRANSIT
light will briefly illuminate.
TM 1-1520-240-10
2-15-14
WARNING
The manually operated fuel/defuel valve
must be placed in the closed position following
pressure refueling. Failure to do so
could permit significant fuel leakage in the
event of a crash and the vent self-sealing
breakaway valve fails to actuate.
j. Manual FUEL/VENT VALVE at each tank assembly
— CLOSED.
k. Single-Point Pressure Refueling Hose
Assembly- Unisex valve at the ERFS II tank — CLOSE.
l. Fuel hose from refueling source — Disconnect
from aircraft single-point pressure refueling connection.
m. Electrical ground — Disconnect electrical ground
from refueling source to the aircraft.
2-15-11. Gravity Refueling.
a. Electrical ground — Connect electrical ground
from refueling source to aircraft.
b. Grounding Cable on each ERFS II tank — Check
connection security.
c. Filler cap — Remove.
d. Service tank.
CAUTION
The operator must exercise caution to
avoid ERFS II tank overflow during gravity
refueling. there is no automatic fuel flow
shutoff.
e. FUEL QUANTITY switch — Set to 1, 2, 3, TOTAL
to confirm tanks and system contain desired fuel quantities.
(Will indicate only when aircraft power is applied).
f. Filler Cap — Replace.
g. Electrical ground — Disconnect electrical ground
from refueling source to aircraft.
2-15-12. Fuel Transfer.
Fuel transfer from the ERFS II tanks to the helicopter’s
main tanks is accomplished through the use of dual centrifugal
pumps in each ERFS II tank. During fuel transfer,
the manually operated fuel/defuel valve on each tank
must be closed to prevent fuel circulation inside the tank.
With the fuel/defuel valve closed, fuel is pumped into the
fuel manifold at a rate of approximately 20 gpm. Fuel is
delivered by the fuel manifold to the helicoter main fuel
tanks through the aircraft fuel system quick disconnect
fittings in the left and right side cargo compartment at
STA 380. During transfer, the roll-over vent valve in each
ERFS II tank allows venting and equalization of tank
pressure above 5 psi from thermal expansion, contraction,
and barometric pressure changes in the bladders.
The high level fuel shutoff valves in the tanks prevent
overfilling. The high level fuel shutoff valves in the tanks
prevent overfilling. The metallic float and ball in the rollover
vent valve prevents fuel from escaping should the
tank become inverted in a roll-over and prevents slosh
from uncoordinated flight from leaking to the overboard
vent lines. To transfer fuel from the FARE system, fuel is
pumped from the ERFS II tanks by the FARE pump. The
manually operated fuel/defuel valve must be in the open
position for the FARE transfer.
2-15-13. Engine Oil System.
The engine oil tank and oil quantity indicator are an integral
part of the engine (fig. 2-15-2). Service either engine
oil system as follows:
a. If the engine has not been operated in the preceding
24 hours and the oil level is low, run it and then recheck the
oil level. Otherwise an inaccurate oil level may be indicated.
b. Check oil level by looking through the grilled opening
on the left side of the engine cowling at the 9 o’clock position.
c. If the indicator shows less than full, open the oil filler
access panel on the forward top side of the engine cover.
d. Refer to DA Form 2408-13-1 and table 2-15-1 for
the type of oil to use. Under normal conditions, engines shall
be serviced with one type of oil only. If one type of oil is in
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