Oil Change Procedure - Lycoming IO-390-D Series Maintenance Manual

8. Oil Change Procedure

NOTICE: Refer to Table 1 for the oil servicing schedule for your engine.
An anti-scuffing oil additive can be added to the oil sump during an oil change. Refer to
the latest revision of Service Instruction No. SI-1409 for oil additive information.
On new, rebuilt, or overhauled engines, during the first 50 hours of engine operation,
operate this engine on mineral oil until oil consumption has stabilized.
Per the "Engine Operation" chapter in the IO-390-D Series Engine Installation and Operation
Manual, operate the engine until the oil temperature stabilizes and then shut down the engine
wait at least 15 minutes after engine shutdown and then proceed with the oil change.
NOTICE: If an oil sample is to be taken, within 30 minutes after engine shutdown, complete
the oil change and collect an oil sample from the oil sump. Send the oil sample in
the vial to the same laboratory (that has been used in the past) for spectrographical
analysis to compare past results and identify a wear trend pattern. Refer to the latest
revision of Service Letter No. L171 for spectrographic oil analysis.
CAUTION
A. Drain the oil from the oil sump as follows:
(1) Put a suitable collection container
with a minimum 15-quart (14-liter)
capacity under the drain plug of the
oil sump (Figure 2).
(2) Remove and discard the safety
wire/cable from the oil drain plug.
(3) Remove the oil drain plug from the
oil sump.
(4) Connect an oil drain hose if
available.
(5) For routine oil changes, collect an
oil sample per the laboratory
vendor's sample oil collection
procedure.
(6) Let the remainder of the oil drain
from the engine into the collection
container.
B. Apply one to two drops of Loctite
plug and install the oil sump drain plug in the oil sump. Torque the drain plug in accordance
with the Standard Torque Tables in the latest revision of the Service Table of Limits - SSP-
1776.
12-10
Page 68
THE ENGINE OIL WILL BE VERY HOT AND CAN CAUSE BURNS,
HANDLE WITH CARE.
®
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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Oil Suction Screen and Drain Plug
™
or equivalent to the threads of the oil sump drain
© 2020 Avco Corporation. All Rights Reserved
Figure 2
March 2020