Lycoming TEO-540-C1A Maintenance Manual page 279

TEO-540-C1A Engine Maintenance Manual
TEO-540-C1A Engine Maintenance Manual
(3) Record the size of the removed Heli-Coil
the insert.
(4) Apply of coat of grease liberally to the Bottoming Tap 64596-1 (Figure 52).
(5) If the Heli-Coil
precautions to prevent metal shavings from falling into the combustion chamber.
CAUTION
(6) Turn the crankshaft to the start of the compression stroke.
(7) Put 8 ft. (2.4 m) of 3/8 in. (9.5 mm) nylon rope through the opposite spark plug hole.
(8) Turn the crankshaft to force the rope against the bottom of the spark plug hole that is to
be tapped.
(9) Use the 0.010 in. oversized Bottoming Tap 64596-1 (Figure 52), to tap an oversize hole
for the new 0.010 in. oversized Heli-Coil
(10) Remove all chips and shavings to prevent contamination from foreign object debris.
(11) Remove the rope from the spark plug hole.
0.010-Inch Bottoming Tap 64596-1
(12) Install the new 0.010 in. oversized Heli-Coil
(a) Use the T-shaped Inserting Tool P/N 64594 (Figure 53) and withdraw the mandrel
portion of this tool beyond the recessed section of its sleeve.
(b) Put the new 0.010 in. oversized Heli-Coil
(c) Push the mandrel to engage its slotted end with the tang of the new 0.010 in.
oversized Heli-Coil
(d) Turn the mandrel clockwise and press it forward slightly to engage the threaded end
of the new 0.010 in. oversized Heli-Coil
(e) While holding the sleeve of the tool, turn the mandrel where adjacent turns of the new
0.010 in. oversized Heli-Coil
threads and the insert is firmly on the Inserting Tool P/N 64594. Keep the new 0.010
in. oversized Heli-Coil
on the threads of the cylinder head.
© 2018 Avco Corporation. All Rights Reserved
November 2018
®
insert is replaced while the cylinder is installed on the engine, take
IF METAL SHAVINGS FALL INTO THE COMBUSTION CHAMBER
OF THE CYLINDER. STOP AND REMOVE ALL SHAVINGS AND
DEBRIS. THE COMBUSTION CHAMBER MUST BE CLEAN.
Figure 52
®
insert.
®
®
insert securely on the tool to enable installation of the insert
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insert in the engine logbook and then discard
®
insert.
Inserting Tool P/N 64594
®
insert into the spark plug hole as follows:
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insert into the recess on the tool.
®
insert.
insert are in contact with each other to prevent crossed
Figure 53
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