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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
Engine Assembly Checklist for IO-390-D Series Engines (Cont.)
Complete the "Oil Sump Installation" procedure in
Chapter 72-50. Be sure to install a new oil sump
gasket.
Complete the "Piston Installation" procedure in
Chapter 72-30 for all four pistons. Make sure new
piston rings are installed on each piston.
Complete the "Fin Stabilizer Installation" procedure
in Appendix A on all cylinders.
Complete the "Cylinder Installation" procedure in
Chapter 72-30.
(If necessary) complete the "Starter Ring Gear
Replacement" procedure in Chapter 72-70.
Install the starter ring gear support per the "Starter
Ring Gear Support Installation" procedure in
Chapter 72-70.
Complete the "Oil Level Gage Tube and Assembly
Installation" procedure in Chapter 72-50.
Complete the "Intercylinder Baffle Installation"
procedure in Chapter 72-30.
Install a new oil drain tube at each cylinder head
and at the crankcase per the "Oil Drain Tube
Installation" procedure in Chapter 72-30.
Complete the "Intake Pipe Installation" procedure
in Chapter 72-80.
Examine, set the gap, rotate, and install the spark
plugs per procedures in Chapter 74-20.
Complete the "EIS Installation" or "Magneto
Installation" procedure in Chapter 74-30.
Complete the "Ignition Harness Installation"
procedure in Chapter 74-20.
Complete the "Propeller Governor Oil Line
Installation (Engines with Rear-Mounted Propeller
Governor Drives)" procedure in Chapter 72-50.
Complete the "Fuel Manifold Installation"
procedure in Chapter 73-10.
Complete the "Fuel Injector Installation" procedure
in Chapter 73-10.
© 2020 Avco Corporation. All Rights Reserved
March 2020
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Page 125
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