Lycomin 0-360 - Page 129

TEXTRON
LYCOMING
OPERATOR'S
MANUAL
0-360
and
ASSOCIATED
MODELS
SECTION
5
(2)
To remove
the hydraulic
tappet
plunger
assembly,
use
the special
Lycoming
service
tool. In the
event that
the tool is
not
available,
the
hydraulic
tappet plunger
assembly
may
be removed
by
a hook
in the end
of a short
piece
of lockwire,
inserting
the wire
so
that
the hook
engages the
spring
of the plunger
assembly.
Draw
the
plunger assembly
out of the
tappet body
by gently
pulling
the wire.
CAUTION
Never
use a
magnet to
remove
hydraulic
plunger assemblies
from
the
crankcase.
This can
cause the
check ball
to remain
off its
seat, rendering
the unit inoperative.
d. Assembly
of Hydraulic
Tappet
Plunger
Assemblies
- To
assemble
the
unit,
unseat the
ball by
inserting
a thin clean
wire through
the
oil inlet
hole. With
the ball
off its seat,
insert
the plunger
and twist
clockwise
so
that
the spring
catches.
All oil
must be
removed before
the
plunger is
inserted.
e. Assembly
of Cylinder
and Related
Parts - Rotate
the crankshaft
so
that
the connecting
rod
of the cylinder
being
assembled
is at the
top
center of
compression
stroke.
This can
be checked
by
placing two
fingers
on the intake
and exhaust
tappet
bodies.
Rock crankshaft
back
and forth
over
top
center.
If the
tappet
bodies
do not
move
the
crankshaft
is on the
compression
stroke.
(1) Place
each
plunger
assembly
in
its respective
tappet
body
and
assemble
the
socket on
top of plunger
assembly.
(2) Assemble
piston
with rings
so
that the
number
stamped
on
the
piston
pin boss
is toward
the
front
of the
engine.
The
piston
pin
should
be a
handpush
fit.
If difficulty
is
experienced
in
inserting
the
piston
pin,
it is probably
caused
by carbon
or burrs
in the
piston pin
hole.
During assembly,
always
use
a generous
quantity
of oil, both
in
the piston
hole
and on
the piston
pin.
(3)
Assemble
one
piston
pin plug
at each
end
of the
piston
pin and
place
a new
rubber
oil seal
ring
around
the
cylinder
skirt.
Coat
piston
and
rings
and the
inside
of the
cylinder
generously
with
oil.
5-9