TEXTRON LYCOMING OPERATOR'S MANUAL
SECTION 5 0-360 and ASSOCIATED MODELS
(4) Remove rocker box cover
and rotate crankshaft
until piston is
approximately at top center of the compression stroke. This is
indicated by a positive pressure inside of cylinder tending to push
thumb
off of bottom
spark plug hole.
(5) Slide valve rocker shafts from cylinder head and remove the valve
rockers. Valve rocker shafts can be removed when the cylinder is
removed from the engine. Remove rotator cap from exhaust valve
stem.
(6) Remove push rods by grasping ball end and pulling rod out of
shroud tube. Detach shroud tube spring and lock plate and pull
shroud tubes through holes in cylinder head.
NOTE
The hydraulic tappets, push rods, rocker arms and valves must be
assembled in the same location from which they were removed.
(7) Remove cylinder base nuts and hold down plates (where
employed) then remove cylinder by pulling directly away from
crankcase. Be
careful not to allow the piston
to drop against the
crankcase,
as the piston
leaves the cylinder.
b. Removal
of Piston from Connecting
Rod - Remove the piston pin
plugs. Insert piston pin puller through piston pin, assemble puller nut;
then
proceed to remove piston pin.
Do not allow connecting rod
to rest
on the cylinder bore
of the crankcase. Support the
connecting rod with
heavy rubber band, discarded
cylinder base oil ring seal,
or any other
non-marring method.
c. Removal
of Hydraulic Tappet Sockets
and Plunger Assemblies -
It
will be necessary
to remove and bleed the
hydraulic tappet plunger
assembly so that dry
tappet clearance can be checked
when the cylinder
assembly
is reinstalled. This is accomplished
in the following manner:
(1) Remove the hydraulic
tappet push rod socket
by inserting the
forefinger
into the
concave end
of the socket
and withdrawing.
If
the socket cannot
be removed
in this manner,
it may be
removed by
grasping the edge of
the socket with a pair of
needle nose pliers.
However, care must be exercised
to avoid scratching
the socket.
5-8
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