Table of Contents
Advertisement
Section
8 Engine
Crankcase
Seal Installation
Crankcasel
Crankshaft
Reassembly
IMPORTANT!
Seal inte
grity is
vital
to
both en
gine
perfor
ma
nce
and
durability
l
Always
re
plac
e
both
crankcase sea ls during
overl
, aul
Follo in
g
assemb
ly,
always
pressure-test
Ihe
engine
for
poss
lble
air
leaks
l
STEP 1. Grease the seal lips.
Prior
lo
installing either
seal,
ap
ply
a
small
amount
of
c lea
n
grease
bolh
aroun
d
an
d
behi
Id
the seal's
neoprene
lip
(Fi
gure
822)
A sea
l
with
a
plain
melal
OO
.
should
also
rece
ive a
thin
coati
ng
of
ThreeBond
11
04
(or
equivalent) prior
to
in
stal
lation.
STEP 2. Install the new seals.
Using
the
app
ropri ate
sea
l
driver
(see
Appendix.
Specia/
Too/s)
and a
de
d-blow
hammer,
install and
seat each sea
l
lo
the
depth
al
lowed
by the
se
al
driver
(Figure
8
23)
IMPORTANT!
Seal
dri ver
part nu
mbers lor
a
spe
c
ific
saw
model
must
be
matched
to
Ihe
c
rankcase
half
being
serv ice
d
.
STEP
3. earefu
ll
y
insp ect
lhe
completed
seal
install
ations. A
sea
l
that
contac ts
an Inner
beari
ng race
or
that
is
bent
or
damaged
in
any way
must
be
replaced.
STEP 1.
Push
the
tapered
end
01
lhe
c
rank
shaft
assembly
th
roug
h
the
crankcase
bearin
g
.
•
Crankshaf
t
bearin
gs
are p
ress-lit on
c
ranksha
fts used
on
Model
s 488, 695,
and
757.
For easier
bea
ri ng
installation on
Ibese
models,
pre-h
eal
lbe
bearin
gs
to
not
more
than 210°F
STEP 2.
Install
the
appro
priate c
ank
case
gasket/gasket
compound
Models 300, 300S,
360, 377,577,757
Applya
thin bead
01
Three-BondT
' V I
No.
1207e
or
11
04 Li
qui
d
Gasket
lo
lhe
mat
ing
surfaces
01
crankcase
"c.
"
(Figure
8.24).
Models 488, 575, 695
Place
th
e appropriate
p/n
c
rankcase
9
sket
ove
r
the locatlng
pin
s
on
crankcase
hall
"e"
Gasket
is
installed
dry
(no
sea
lant)
Seal
CFf
~
17
Figure 8.22 Grease fhe
New
Seal
Dead-
blow
Figure
8 23
Seallnstallation
Use exisling stocks
of
Three-Bond™
1104 until
current
supply
is
exhausted.
Figore
8.24 App/ymg
L/quid
Gasket
(nol used on Models 488,575 and
695)
~,
Shln
alw
Inc
1995
88
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
