Lycoming IO-390-D Series Maintenance Manual page 146

Step
"Oil Level Gage Tube and Assembly
Step 25
Installation" procedure in Chapter 72-
Install the
50
oil level
gage
assembly
and oil level
gage tube
(Figure 24).
Oil Level Gage Tube
"Intercylinder Baffle Installation"
Step 26
procedure in Chapter 72-30
Install inter-
cylinder
baffles
(Figure 25).
"Oil Drain Tube Installation"
Step 27
procedure in Chapter 72-30
Attach four
new oil
drain tubes,
one on each
engine
cylinder
head and
the
crankcase
(Figure 26).
72-10
Page 120
Sequence of Engine Assembly Procedures
Reference
Figure 24
Figure 25
Intercylinder Baffle
Figure 26
Oil Drain Tubes
IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Table 2 (Cont.)
Step
Step 28
Examine,
set the gap,
and install
all spark
plugs (one
in the top
and bottom
of each
engine
cylinder)
(Figure 27).
Step 29
Install the
Lycoming
Electronic
Ignition
System
modules or
magnetos
on the
engine
(Figure 28).
Step 30
Install the
ignition
harness on
the engine
(Figure 29).
© 2020 Avco Corporation. All Rights Reserved
Reference
"Spark Plug Gap Setting" and "Spark
Plug Installation" procedures in
Chapter 74-20.
Figure 27
Spark Plugs
"EIS Installation" or "Magneto
Installation" procedure in Chapter 74-
30
Figure 28
EIS/Magnetos
"Ignition Harness Installation"
procedure in Chapter 74-20
Figure 29
Ignition Harness
March 2020