IO-390-D Series Engine Maintenance Manual
72-50
© 2020 Avco Corporation. All Rights Reserved
Page 232
March 2020
IO-390-D Series Engine Maintenance Manual
4.
Oil Line Replacement
A.
Disconnect, drain, and discard the oil line.
CAUTION
REPLACE A BRITTLE, CRACKED, KINKED, OR DAMAGED OIL LINE.
B.
Install a new oil line; do not let the oil line touch a heat source.
CAUTION
MAKE SURE THERE ARE NO SHARP BENDS OR KINKS IN THE OIL
LINE ROUTING TO PREVENT INTERRUPTIONS TO OIL FLOW.
MAKE SURE OIL LINES ARE NOT TOUCHING HEAT SOURCES
THAT COULD DAMAGE THE LINE AND CAUSE OIL LOSS.
C.
Torque the fitting connections on the oil line ends in accordance with the torque values in the
Standard Torque Tables in the latest revision of the
Service Table of Limits - SSP-1776
and
aircraft manufacturer’s instructions.
5.
Oil Level Gage Tube and Assembly Removal
A.
Remove and discard the safety wire/cable (Figure 2) from the oil level gage tube.
B.
Carefully turn the oil level gage tube (Figure 3) to remove the oil level gage assembly and
tube as a unit (with the dipstick and O-ring) from the engine. Discard the oil level gage
gasket and oil level gage plug ring.
C.
Put the oil level gage assembly on a clean surface in a safe place to prevent damage to the
components.
Figure 2
Safety Wire on the Oil Level Gage
Figure 3
Oil Level Gage
6.
Oil Level Gage Tube and Assembly Installation
NOTICE:
Refer to the applicable parts catalog for the correct oil level gage assembly and oil level
gage tube for your IO-390-D engine model.
A.
Install a new oil level gage gasket on the threads of the top of the oil level gage tube (Figure 3).
B.
Apply Food-Grade Anti-Seize to the threads of the oil level gage tube and oil level gage plug
ring.
C.
Install the oil level gage tube on the engine.
D.
Safety wire/cable the oil level gage tube as shown in Figure 2. Refer to the latest revision of
Service Instruction No. SI-1566.
E.
Install a new oil level gauge plug ring on the threads of the oil level gage assembly (Figure 3).
F.
Apply Food-Grade Anti-Seize to the threads at the top and bottom of the oil level gage tube.
G.
Install the oil level gage assembly (with the dipstick and new plug ring) in the oil level gage
tube securely.
