Lycoming YO-233-B2A Maintenance Manual page 161

YO-233-B2A Engine Maintenance Manual
TEO-540-A1A Engine Maintenance Manual
S. Oil Drain Tube Installation
NOTICE: Since there are different oil drain tube assemblies for the engine cylinders, refer to
the YO-233-B2A Illustrated Parts Catalog for the correct part number for the oil
drain tube assembly to ensure the correct oil drain tube assembly is installed on the
corresponding engine cylinder.
(1) If a new nipple (Figure 53) is to be installed on the crankcase, apply Loctite
threads of the nipple. Torque the nipple to 85 in.-lb. (9.6 Nm).
(2) Connect a new hose to the nipple in the crankcase.
Figure 53
Oil Drain Tube
(3) Install and tighten a hose clamp on the hose as follows: for Cylinder Nos. 1 and 2, face
towards the front of the engine; for the remaining cylinders, install the hose clamp face
towards the rear of the engine (Figure 54).
(4) Connect the oil drain tube to the elbow fitting at the cylinder with a flange nut. Torque
the nut per instructions in the latest revision of the Service Table of Limits - SSP-1776.
(5) Connect the oil drain tube to the installed new hose and install a hose clamp.
(6) Torque both hose clamps per instructions in the latest revision of the Service Table of
Limits - SSP-1776
(7) Tighten the drain tube coupling to the fitting finger tight, plus ½ to ¾ turn. Adjust the
cylinder head drain fitting as necessary for alignment. Make sure the oil drain tubes are
not touching the intercylinder baffles or cylinders.
© 2021 Avco Corporation. All Rights Reserved
February 2021
Figure 54
Oil Drain Tubes, Clamps, and Fittings
®
564 to the
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