3-4
IO-240 Series Engine Installation & Operation Manual
31 October 2011
Engine Installation
3-2. Installation Procedures
3-2.1. Prepare the Airframe for Engine Installation
1. Verify the airframe fuel filter and boost pump are installed and operate according to
the airframe manufacturer’s instructions.
WARNING
Purge the aircraft fuel tanks and lines to remove all
contamination prior to connecting the main fuel supply to the
fuel pump inlet. Failure to purge contamination may cause
erratic fuel injection system operation.
Fuel injectors are sensitive to dirt and particulate
contamination. To avoid contamination, do not disconnect fuel
line connections between the fuel pump and the fuel injectors.
CAUTION: Follow the airframe manufacturer’s schedule interval
for airframe mounted fuel and oil hoses. Hoses become brittle with
age; we recommend hose replacement coincident with engine
overhaul to avoid immediate contamination or failure at a later date.
2. Replace all aircraft flexible oil and fuel hoses according to the aircraft
manufacturer’s instructions prior to engine installation.
3. Clean the aircraft fuel strainer and allow at least one quart of fuel to flow through the
strainer and fuel supply line into a Type 1 fuel container through a paper filter.
4. Inspect the paper filter for contamination; if the fuel supply is free of contamination,
proceed with engine installation. If contaminants are found in the fuel supply, isolate
and correct the source of contamination prior to connecting the aircraft fuel supply
to the engine driven fuel pump.
3-2.2. Prepare the Engine for Installation
Remove packing material, tags, and the preservative fluid from the oil sump of new,
rebuilt, overhauled or stored engines prior to installation.
NOTE: If the engine won’t be installed immediately, refer to the “Engine
Preservation and Storage” instructions in Chapter 9 of the Maintenance
and Overhaul Manual (M-6).
1. Remove the shipping plugs or dehydrator plugs from the spark plug holes.
2. Remove the AN-4060 protectors from the ignition leads.
3. Place a basin under the engine to catch the cylinder preservation oil.
NOTE: NOTE: A small amount of preservative oil remaining in the
cylinder bore is acceptable; it will burn off during the first engine start.
4. Turn the crankshaft through at least two complete revolutions to remove the cylinder
preservation oil from the cylinders.
5. Catch the cylinder preservation oil draining out of the lower spark plug holes.
Summary of Contents for IO-240-A
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