[
NOTE)
Before.
re
ass
embling
th
e e
ngin
e,
make
s
ure
tha
t
the
four
c.onnecting
rods
are
e
qual
in
wei
ght
wi.llin ±5
gram
s
(±O.I
8
0.)
of
the specification
weight.
Flywheel inspection
(I)
Repair the fdction surface of the
fl
ywheel
if
it is
f
ound
buml,
stepped,
or
gr
ooyed b)'
ri
Yet
h
••
ds.
If
this surf
ac
e
Is
badly worn or d
am
aged
, the
flywheel must
be
replaced.
(2)
Using"
dial
in
dica
tor
, check the
fri
ction surfa
ce
for
fl
atne
ss
an
d f
ac
e
TUneut
. A perfectly
fl
at
s
urface
js
no
guarantee
that
the
su
rface
will
not
"run
out"
when
it rotates.
Flatness c
an
be checked, as
sh
own, with
th
e
flywheel laid on a surface plate.
To
take the
runou! reading. se
cure
the
Oyw
heel to the crank·
shaft in .he normal
manntr
and roll the crankshaft ,
with the spindle of the dial indicator p
ut
to the
surface
De-
ar
it
s
edge.
Check
in
g1
lywn
e-e
l for
flatness
Checki
ng
flywheel for fa
co
'Uno
ut
MAINHNANCE
AND ADJUSTMENT
Unit: mm
{in
.)
I
tem
Standard
Repair
limit
Flatn
ess
of
fri
ction
0
.1
5 (0.006). 0.5
surf
ace
max
. (0.020)
Fac
e
runout
of 0
.1
5 (0.006),
0 .5
fric.t
i
on
surface
max
. (0.020)
(3)
Mak
e sure that the flywheel securing bolts
are
in
good
!:
ondition, w
it
h their screw threads showing
~o
si
gns
of
stripping. The
ring
gear with bro
ken
or
badly
wo
rn
t
ee
th
mu
st
be
re
placed
.
Clean
the
bu
shing
for
p
il
ot
oe
aring
~
if
the bushing is abnor-
mally
wo
rn
or
showing defective contact
pa
ttern,
repl
ace it.
Timing mechanism
Cam,haft inspection
(1) Support the ca,,,,haft at No. I and
No.3
journals
by
"V"
~Iocks,
with the spindle
of
the d
ial
gauge
put
to No. 2 journal, and
roU
the casruhaft
to
measure its distortion (which
is
one·haIf
of
the
deflection, that is, Ihe d
ial
sause
indication).
Straighte
n
the
camsl1.aft
in
a
press
or replace
H,
as
necessary .
Unit: mm lin.'
Item Standard
Service
l
imit
Camshaft
distortion
0.02 (0.0008),
0.0
5
max.
(0
.
00
20)
Chec
king
c
amshaft
dlrl
lection
(2)
Mike each cam
of
the camshaft to read
OJ
(cam
height) and
Ih
(diameter). and
compute
the
differenoe between
D.
and D2.
If
this difference
i$less than the service limit, replace the comshaft.
61
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