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Top Products
Tractors,
Lawn
and
Garden
-
110
and
112
Engin
e
20
SM
-
2059
-(Apr-57)
Piston.
Crankshaft
and
Flywheel
-
Kohler
15-9
,
It
:
Fig
79-Pisl
on
Damage
Caused
by
Wrisl
Pi
n L
ock
C
oming
Loose
In
the
above
illustration
a p
iece
of
the
lock
fo
und
its
way
into
the
oil
ring.
Pin
locks
loosen
or
break
due
to:
1.
Hod
misalignment.
2.
Excessive
crankshaft
end
play.
3.
Crank
pin
taper.
4.
Weak
pin
locks.
5.
Pin
locks
incorr
ectly
installed.
Inertia
can
cause
a l
ock
or
loose
object
in-
side
the
piston
pin
to
beat
out
the
pist
on
and
cylinder
in
the
pin
boss
area.
Dama
ge
to
l
)o
th
piston
and
cylinder
OCCurS.
INSPECTING
CRANKSHAFT
Wipe
crankshaft
dry
and
check
general
con-
clition.
Clean
up
thr
eads
on
end
of
shaft
if
nec-
essary.
If
crankshaft
journal
indicates
wea
r
be-
-
yond
specified
limit
s
or
if
journal
is
scored,
take
the
crankshaft
to
a
competent
aut
om
otive
shop
to
turn
th
e
crankpin
down
O.OlO-inch.
An
underSize
connectin~
rod
and
cap
must
then
be
installed
.
THIS
IS
IMPORT
ANT.
Do
not
just
replace
a
crankShaft
having
a l
)a
d
journal.
Turnin
g
down
th
e
journal
and
installin
g a
new
r
od
will
likely
be
th
e
least
expens
i
ve
meth
od of
repair.
Fi
g. 2
0-
Ml>o
s
ur
l
n9
Cr
an
ks
hall
Jour
na
l
C
NNECTING
R
OD
AND
CAP
A ALYSIS
rAP
M
se,iO
F
ig
27
-Cronks/'all
Ca
nnec
ling
Rod
and
Cap
After
cleaning
anddryingparts,
checkroc\ancl
cap
for
signs
of
bending,
cracking
or
unusual
wea
r
patterns.
Litho
in
U.S.A.