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pressure refuel that tank unless the fuel
cap is removed to prevent possible fuel
cell over-pressurization. If both switches
are inoperative, do not pressure refuel the
helicopter. In addition, if both float
switches are inoperative for either main
tank, the system must be repaired before
flight to prevent fuel cell over-pressure.
(6) Open the flow control valve on the nozzle.
Check that fuel flow stops within 4 seconds. A small
amount of fuel will continue to flow through the open
secondary ports.
(7) Set the ALL TEST switch to SEC OFF.
Check that fuel flow stops within 4 seconds. A small
amount of fuel will continue to flow through the open
primary ports.
f. If all tanks are to be filled, set the ALL TEST
switch to FLOW. All tanks will now fill independently.
Rotate the FUEL QUANTITY selector switch, checking
each tank for proper fill and quantity. Shutoff valves in
each tank will close and stop fuel flow as each tank fills.
g. When refueling is completer, close the flow control
valve.
h. If tanks are to be partially or selectively filled, be
sure to perform steps e. (6) and e. (7), then proceed as
follows:
(1) Set the six FUEL CELL SHUT OFF VALVE
TEST switches to PRI OFF.
(2) Set the ALL TEST switch to FLOW.
(3) Rotate the FUEL QUANTITY selector
switch to the tank to be filled. The indicator pointer will
indicate tank fuel quantity.
(4) Set the FUEL CELL SHUTOFF VALVE
TEST switch of the tank to be filled to FLOW.
(5) Open the flow control valve.
(6) When the desired fuel level is reached, set
the FUEL CELL SHUTOFF VALVE TEST switch to PRI
OFF.
(7) Repeat steps (3), (4), AND (6) on each tank
until the desired amount of fuel is in each tank.
(8) Close the flow control valve and disconnect
the nozzle and ground cable.
i. Set the PWR switch to OFF. Check that the REFUEL
VALVE POSN lights momentarily illuminate, then
extinguish. If either light does not illuminate on, then
extinguish, the fuel in that aft auxiliary tank is unusable.
Notify maintenance.
j. Close the landing gear access door.
TM 1-1520-240-10
2-15-3
k. Remove ground cables from the helicopter.
l. Set the REFUEL STA switch on the FUEL
CONTR overhead panel to OFF.
CAUTION
Perform steps m., n., and o. if helicopter
will not be operated immediately. Failure
to do so could result in refuel manifold
seepage caused by fuel expansion.
m. APU — Start (refer to Chapter 8). Place APU
GEN switch to ON or apply AC external power.
n. Operate the forward boost pump on either main
tank for about two minutes.
o. Place APU GEN switch to OFF, APU switch to
OFF, or disconnect the external power.
TM 1-1520-240-10
2-15-4
Figure 2-15-1. No Step, No Handhold, and Walkway Areas
TM 1-1520-240-10
2-15-5
Figure 2-15-2. Servicing Diagram (Sheet 1 of 4)
TM 1-1520-240-10
2-15-6
Figure 2-15-2. Servicing Diagram (Sheet 2 of 4)
TM 1-1520-240-10
2-15-7
Figure 2-15-2. Servicing Diagram (Sheet 3 of 4)
TM 1-1520-240-10
2-15-8
Figure 2-15-2. Servicing Diagram (Sheet 4 of 4)
TM 1-1520-240-10
2-15-9
Table 2-15-1. Servicing
SERVICEABLE ITEM MATERIAL SPECIFICATION CAPACITY
(SEE NOTE A)
L Main Tank JP-4, JP-5 MIL-T-5624 278 Gallons
R Main Tank or JP-8 MIL-T-83133 274 Gallons
L Fwd Aux Tank JP-4, JP-5 MIL-T-5624 122 Gallons
R Fwd Aux Tank or JP-8 MIL-T-83133 119 Gallons
L Aft Aux Tank JP-4, JP-5 MIL-T-5624 118 Gallons
R Aft Aux Tank or JP-8 MIL-T-83133 117 Gallons
ERFS II Tank 1,
2, or 3
JP-4, JP-5
or JP-8
MIL-T-5624
MIL-T-83133
825.5 Gallons
825.5 Gallons
Each Engine Oil TAnk Lubrication Oil MIL-L-23699 or MIL-L-7808
(See note C)
12 Quarts
APU Engine Oil Lubrication Oil MIL-L-23699 or MIL-L-7808
(See note C)
3 Quarts
Forward Transmission Lubrication Oil DOD-L-85734 or MIL-L-23699
(See note C)
26 Quarts
Aft Transmission Lubrication Oil DOD-L-85734 or MIL-L-23699
(See note C)
41 Quarts
Combining Transmission Lubrication Oil DOD-L-85734 or MIL-L-23699
(See note C)
20 Quarts
Engine Transmission (each) Lubrication Oil DOD-L-85734 or MIL-L-23699
(See note C)
10 Quarts
Each Flight Control System Reservoir
Hydraulic Fluid MIL-H-83282 (See note B) 2 Quarts
Utility Hydraulic System Reservoir Hydraulic Fluid MIL-H-83282 (See note B) 6 Quarts
Rotor Head Oil Tanks Lubrication Oil MIL-L-7808 As Required
Shock Absorbers and Landing
Gear Shock Struts
Hydraulic Fluid MIL-5606 As Required
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