SECTION 3
LYCOMING OPERATOR’S MANUAL
OPERATING INSTRUCTIONS
IO-320 SERIES
ALL MODELS
*Recommended Grade Oil
Average
MIL-L-6082
Ashless Dispersant
Ambient Air
Grades
Grades
Above 80°F (26.66°C)
SAE 60
SAE 60
Above 60°F (15.55°C)
SAE 50
SAE 40 or SAE 50
30°F to 90°F (-1.11°C to 32.22°C)
SAE 40
SAE 40
0°F to 70°F (-17.77°C to 21.11°C)
SAE 20
SAE 30 or SAE 40
Below 10°F (-12.22°C)
SAE 20
SAE 30
* - Refer to the latest edition of Service Instruction No. 1014.
Oil Sump Capacity.........................................................................................................................8 U.S. Quarts
Minimum Safe Quantity in Sump ..................................................................................................2 U.S. Quarts
OPERATING CONDITIONS
Average
Oil Inlet Temperature
Ambient Air
Desired
Maximum
Above 80°F (26.66°C)
180°F (82°C)
245°F (118°C)
Above 60°F (15.55°C)
180°F (82°C)
245°F (118°C)
30°F to 90°F (-1.11°C to 32.22°C)
180°F (82°C)
245°F (118°C)
0°F to 70°F (-17.77°C to 21.11°C)
170°F (77°C)
225°F (107°C)
Below 10°F (-12.22°C)
160°F (71°C)
210°F ( 99°C)
Oil Pressure, psi
Maximum
Minimum
Idling
Normal Operating
90
60
25
Start and Warm-Up
100
Fuel Pressure, psi
Maximum
Desired
Min.
IO-320-B, -D, -E Series;
AIO-320; LIO-320-B
Inlet to fuel pump
35
-----
-2
Inlet to fuel injector
45
-----
12
Inlet to fuel pump with
injector in idle cut-off
55
-----
----
IO-320-C Series; LIO-320-C
Inlet to fuel pump
45
-----
-2
Inlet to fuel injector
45
-----
14
Inlet to fuel pump with
injector in idle cut-off
55
-----
----
3-6
Summary of Contents for AIO-320
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