Lycoming TEO-540-C1A Maintenance Manual page 196

C. Expansion Plug Installation
NOTICE: If a constant speed propeller is used, there is no need to install an expansion plug.
Otherwise, a new expansion plug is necessary for this procedure. Refer to the TEO-
540-C1A Illustrated Parts Catalog for the part number.
(1) Remove any remaining gasket maker from the crankshaft flange with an acetone-soaked
wipe.
NOTICE: Make sure the surface is clean and that there is no debris or remaining gasket
maker to ensure a good seal when the new bead of gasket maker is applied in the
next step.
(2) Apply a bead of Loctite
of a new expansion plug.
(3) Seat the new expansion plug firmly on the shoulder in the bottom of the crankshaft bore
with the convex side out (Figure 51).
NOTICE: A driver and a press table can be used to press the expansion plug in the
crankshaft bore.
(4) Install a Crankshaft Welch Plug Driver P/N 64681 against the expansion plug and strike
the end of the driver with a hammer until the expansion plug is correctly seated (Figure
51) in the crankshaft bore.
(5) Remove excess gasket material with a clean cloth soaked with acetone.
72-20
Page 166
®
#2 Non-Hardening Gasket Maker or equivalent to the perimeter
Figure 51
Installed Expansion Plug
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TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
November 2018