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taking a fuel sample, allow the fuel to settle the b. Oils (Table 2-3).
prescribed time after refueling. Settling time is one hour
per foot of tank depth for jet (JP) fuels. c. Fluids (Table 2-4).
WARNING NOTE
Color is not to be used as a discriminator
Servicing personnel shall comply with all when determining the type of fuel, oil, or
safety precautions and procedures fluid used when servicing the helicopter.
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2-92. TYPES AND USE OF FUELS. (3) Emergency Fuels. None approved.
a. Fuel Types. Refer to TB 55-9150-200-24 Engine b. Use of Fuels.
and Transmission Oils, Fuels, and Additives for Army
Aircraft. (1) When mixing fuels in helicopter fuel cells, or
changing from one type of authorized fuel to another,
(1) Army Standard Fuels. JP-8 and JET B MIL- for example, JP-8 to JP-5, it is not necessary to drain
T-5624 are the Army designated primary fuels. the helicopter fuel system before adding the new fuel.
(2) Alternate Fuels. JP-5, JET A, and JET A1 (2) Fuels having the same NATO code number
are designated as the alternate fuels to be used in this are interchangeable. Jet fuels conforming to ASTM-D-
helicopter. JP-5 and JET-A1 contain icing inhibitor 1655 specification may be used when MIL-T-5624 fuels
blended at the refinery. JET A does not contain icing are not available. Engine will operate satisfactorily on
inhibitor. either JP-8 or JP-5 type fuels.
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Figure 2-26. Servicing Diagram
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Table 2-1. Fuel, Oils, Fluids, Specification, and Capacities
SYSTEM SPECIFICATION NOTE CAPACITY
Fuel MIL-T-83133 (JP-8) 1 112 U.S. Gals. Total
110 U.S. Gals. Usable
Engine Oil *MIL-L-7808 2,5 1.5 U.S. Gals.
MIL-L-23699 3,5
Transmission *MIL-L-7808 2,6 7 U.S. Qts.
Oil DOD-L-85734 4,6
Tail Rotor *MIL-L-7808 2,6 0.38 U.S. Pt.
Gearbox Oil DOD-L-85734 4,6
Hydraulic MIL-H-5606 7,9 1.3 U.S. Pts.
Fluid Reservoir MIL-H-83282 8,9
WARNING
Contact with hydraulic fluid (MIL-H-83282) liquid or
mist can irritate eyes and skin. After any contact with
skin, wash contacted area with soap and water. If
liquid is swallowed, do not induce vomiting; get
immediate medical attention. Wear rubber gloves
when handling liquid. If prolonged contact with mist is
likely, wear an appropriate respirator. When fluid is
decomposed by heating, toxic gases are released.
CAUTION
*Lubrication oil made to MIL-L-7808 by Shell Oil
Company under their part number 307, qualification
number 7D-1, shall not be used in OH-58 engine or
aircraft systems. It contains additives which are
harmful to seals in the systems.
NOTE
If DOD-L-85734 is mixed with MIL-L-23699, the engine/
gearbox shall be drained and refilled with the proper
lubricant when it becomes available.
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NOTE:
1. MIL-T-83133 (JP-8) NATO code is F-34. Alternate fuel is MIL-T-5624 (JP-5), JET A or JET A1, F-44 or F-
34 (high flash point).
2. MIL-L-7808 NATO code is O-148.
For use in ambient temperatures below -18 °C/0 °F.
CAUTION
Under no circumstances shall MIL-L-23699 or
D O D - L - 8 5 7 3 4 o i l b e u s e d i n a m b i e n t
temperatures below -40 °C/-40 °F.
3. MIL-L-23699 NATO code is O-156.
For use in ambient temperatures above -40 °C/-40 °F.
4. DOD-L-85734 for use in ambient temperatures above -40 °C/-40 °F.
DOD-L-85734 oil is a direct replacement for MIL-L-23699, but not for MIL-L-7808.
5. Do not mix MIL-L-7808 and MIL-L-23699 oils, except during an emergency. The engine shall be replaced
after 5 hours of operation with mixed oils. An entry on DA Form 2408-13-1 and 2408-13-1-E is required
when the oils are mixed.
6. Do not mix MIL-L-7808 and DOD-L-85734 oils, except during an emergency. If oils are mixed, oil shall be
drained and system serviced with approved oil within 5 hours of operation.
7. MIL-H-5606 NATO code is H-515.
For use in ambient temperatures below -40 °C/-40 °F.
8. For use in ambient temperatures above -40 °C/-40 °F.
9. It is not advisable to mix MIL-H-5606 and MIL-H-83282 fluids, except during an emergency. An entry on DA
Form 2408-13-1 and 2408-13-1E is required when the fluids are mixed.
(TABLE I.D. 911322)
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Table 2-2. Approved Fuels
PRIMARY OR STANDARD FUEL ALTERNATE FUEL
US MILITARY FUEL NATO JP-8 JP-4 (MIL-T-5624) or JP-5 (MIL-T-5624),
CODE NO. MIL-T-83133 (F-34) JET A or JET B F-40 or F-44
COMMERCIAL FUEL JET A-1 JET B JET A
(ASTM-D-1655) NATO F-34
Atlantic Richfield Arcojet A-1 Arcojet B Arcojet A
Richfield Div Richfield A-1 Richfield A
　
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