The helicopter must be level to get accu-rate oil tank readings. When the helicop-ter is parked on a slope, the downslope engine will read higher oil level than ac-tual, and the upslope engine will read lower.
NOTE
Do not service the engines with DOD-L-85734 oil. If DOD-L-85734 oil is inadvert-
ently added to the engines, drain the oil and add MIL-L-7808 or MIL-L-23699 oil. Flushing the system before re.lling is not required.
The engine oil tank (Figure 2-24) is within the main frame. When the oil level reaches the ADD mark, oil should be added to bring the level to the full mark on the sight gage. Wait at least 20 minutes after engine shutdown before checking engine oil level. Before adding oil, determine whether system contains MIL-L-7808 oil or MIL-L-23699 oil. If .ights of over 6 hours are made, engine oil level must be at the full line of sight glass before .ight.

Table 2-4. Fuel and Lubricants, Speci.cations, and Capacities
SYSTEM  SPECIFICATION  CAPACITY 
Fuel  Primary: Grade JP-4 (NATO Code F-40) (Note 5) Alternate: Grade JP-5 (NATO Code F-44) (Notes 1 and 6) Grade JP-8 (NATO Code F-34) (Note 1)  Main Tanks usable U. S. Gallons of fuel are: 360 gravity, 359 pressure, and 356 closed circuit. External Tank Gravity Refueling: 230 U. S. Gallons each tank. 

Lubricating oils MIL-L-23699, DOD-L-85734 and MIL-L-7808 contain materials 
hazardous to health. They produce pa-ralysis if swallowed. Prolonged contact may irritate the skin. Wash hands thor-oughly after handling. Oils may burn if exposed to heat or .ames. Use only with proper ventilation. 
Engine oil  MIL-L-23699 (NATO Code 0-156) MIL-L-7808 (NATO Code 0-148) (Notes 2, 3 and 7)  7 U. S. Quarts 
Auxiliary power unit  MIL-L-23699 (NATO Code 0-156) MIL-L-7808 (NATO Code 0-148) (Notes 2, 3 and 7)  3 U. S. Quarts (T-62T-40-1) 2 U. S. Quarts (GTC-P36-150) 
Transmission oil  MIL-L-23699 (NATO Code 0-156) MIL-L-7808 (NATO Code 0-148) DOD-L-85734 (Notes 2, 3, 6, and 8)  7 U. S. Gallons 

Change 2 2-79 Table 2-4. Fuel and Lubricants, Speci.cations, and Capacities (Cont)

SYSTEM SPECIFICATION CAPACITY
Intermediate gear box oil Tail gear box oil First stage hydraulic reservoir Second stage hydraulic reservoBackup hydraulic reservoir  ir  MIL-L-23699 (NATO Code 0-156) MIL-L-7808 (NATO Code 0-148) DOD-L-85734 (Notes 2, 3, 6, and 8) MIL-L-23699 (NATO Code 0-156) MIL-L-7808 (NATO Code 0-148) DOD-L-85734 (Notes 2, 3, 6, and 8) MIL-H-83282 MIL-H-5606 (NATO Code H-515) (Note 4) MIL-H-83282 MIL-H-5606 (NATO Code H-515) (Note 4) MIL-H-83282 MIL-H-5606 (NATO Code H-515) (Note 4)  2.75 U. S. Pints 2.75 U. S. Pints 1 U. S. Quart 1 U. S. Quart 1 U. S. Quart 
SOURCE  PRI OILMARY  ALTERNATE OIL 
APPROVED COMMERCIAL OILS 
NOTE 

Commercial oils listed below are approved alternates for engines and gear boxes except as indicated.
U. S. Military Oil  DOD-L-85734 (Note 7) 
NATO Code No. 
COMMERCIAL OIL 
Castrol Inc. 
Exxon Co.  Turbo Oil 25 
Hatco Corp. 
Mobil Corp. 
Royal Lubricants  Royco 555 

MIL-L-23699 or 0-156
TYPE II
Castrol 5050 Castrol 5000 Aerojet 5
Turbo Oil 2380
HATCO 3211 HATCO 3611 HATCO 1639 HATCO 1680
Mobil Jet Oil II Mobil Jet Oil 254
Royco 500 Royco 560 Royco 899 Royco 899HC
MIL-L-7808 0-148 TYPE I Castrol 399
Turbo Oil 2389 Turbo Oil 2391
HATCO 1278 HATCO 1280
Royco 808

Table 2-4. Fuel and Lubricants, Speci.cations, and Capacities (Cont)
SOURCE PRIMARY OIL  ALTERNATE OIL
Shell Oil Company Aeroshell 555  Aeroshell 500 Aeroshell 308 Aeroshell 560
NOTE
1.  
When starting in ambient temperatures below -34°C (-29°F), do not use JP-5 or JP-8.
　
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