Crankshaft Bearing And O-Ring Installation - Lycoming TEO-540-C1A Maintenance Manual

B. Tappet Installation
Unless otherwise directed, install acceptable hyperbolic tappets (that are free of cracks and have
passed all inspection, including Fluorescent Penetrant Inspection) in the same position on the
crankcase halves as they were during removal.
(1) Lubricate the face of the tappet bodies and the
camshaft lobes per the latest revision of Service
Instruction No. 1059.
(2) Install serviceable hyperbolic tappets (Figure 72) as
a complete set in the same location/orientation as
the removed tappet. All of the tappets must be all
hyperbolic tappets. Do not intermix straight body
and hyperbolic tappets in the same engine.
NOTICE Because hyperbolic tappets have a bowed shape, they will not have a snug fit after
they are installed. There will be some tappet movement or play which is acceptable.
Measure the outside diameter of hyperbolic tappets at the widest area (approximately
at the mid-point) of the length of the tappet body.
Replace all of the tappets as a complete set, even if only one is found damaged
Refer to the latest revision of Service Instruction Nos. 1011 and 1514 for additional information
and tappet part numbers.

20. Crankshaft Bearing and O-Ring Installation

NOTICE: If O-ring holes have a countersink, apply Lubriko
before installing the O-rings.
The crankshaft front main bearings are installed on the crankshaft, not in the crankcase
halves
A. Install crankshaft bearings Nos. 2, 3,
and 4 in the crankcase halves. Make
sure the tangs are seated in the lock
slots (Figures 73 and 74).
Figure 73
Main Bearing Tang
72-20
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TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
Installed Tappets
®
M-6 Grease to the countersink
B. Apply engine oil to two new O-rings.
C. Install the two new O-rings (Figure 74).
Figure 74
Crankshaft Bearings and O-Rings
© 2018 Avco Corporation. All Rights Reserved
Figure 72
November 2018