Filter
Top Products
20
Engine
Tractors
,
Lawn
and
Garden
-
110
and
112
35-4
Piston,
Crankshaft
and
Flywheel
-
Tecumseh
SM-2059-(Apr-67)
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REMOVTNG
CYLINDER
COVER-Continued
See
"Special
Tools,"
page
35-19,
for
oil
seal
sleeve
tool.
Remove
governor
spool,
camshaft
and
lifters.
Identify
exhaust
lifter
with
an
"x"
marking
to
assure
correct
install
a
tion
during
assembly.
R
emo
ve
and
discard
lock
nuts
from
connecting
rod
bolts.
NOTE: Use
thin
wall
socket
to
remo
ve
lock
nuts.
U
sing
the
wrong
socket
will
jorce
pyessure
against
rod
cap
and
cause
misalign-
ment.
Remove
connecting
rod
cap
and
push
pis-
ton
and
rod
out
top
of
block.
REMOVTNG
CRANKSHAFT
Fig,
7-Rcmov
ing
Piston
Rin9s
PISTON
RING AN ALYSIS
Fig
.
6-Crankshaft
Remo
val
,H
Insert
seal
sleeve
tool
in
bearing
retainer
seal
and
remove
crankshaft
from
cylinder
block.
Remove
bearing
retainer,
bearing,
bearing
cup
and
shims.
Discard
paper
shims.
Re
move
retaining
ring
and
governor
gear
as-
sembly.
REMOVTNG
PISTON
RINGS
Clamp
the
connecting
rod
in
a
vise
with
soft
jaws
to
prevent
damaging
rod.
CAUTION:
TIght-
en
vise only tight
enough
to
hold the assembly.
Too
much
pressure
will
bend rod.
Use
ring
expander
to
remove
rings,
Figure
7.
Discard
old
rings.
Remove
retainers
from
each
end
of
piston
pin
and
push
pin
out
of
piston
and
connecting
rod.
Fig, 8
-Scored
Pi.ton
and
Rin
gs
Caused
by
Overheating
as
Temperatures
Reach
Melting
Poi'"
of
tl,,,
Material
s
Light
scuffing
or
scoring
of
both
rings
and
piston
occurs
when
unusually
high
friction
and
combustion
temperatures
approach
the
meltin
g
pa
int
of
ring
and
piston
material
,
Figure
8.
When
this
condition
is
'
found,
check
and
cor-
rect
the
following
probable
causes:
1.
Dirty
cooling
shroud
and
cylinder
head.
2.
Lack
of
cylinder
lubrication.
3.
Improper
combustion.
4.
Wrong
bearing
or
piston
clearance.
5.
Too
much
oil
in
crankcase
causing
fluid
friction.
Litho
in
U.S.A.