Unit:
mm
(in.)
I
tem
Stand(lrd
Repa
ir
limit
+0
Piston
'PLn
diameter
28 -{I.006
-Kl
(I
.102
-0.0
0024)
I.D.
of bushing in
"8 -Kl.045
- +0.020
small
end
(I
10" +0.00 177)
.
- +0.00079
Pin
cleil
r
anc.t
in
0.020
- 0.
051
0.08
b
us
hing (0.0008 - 0.0020) (0.003)
(2) Connecting rod alignment and big-end
bearings
(a) Inspect
.ach
connecting rod ror evidence
of
c
ra
c
king,
particula
r
ly
at
t
he
corner
radiu
s
parts
of
the
"(
" shank
n.xt
to the
bIg
and small ends
.nd
also
at
the oil hole in the small end. Con-
m;cling
rod
s
found
cracke
d
or
suspected
of
c
racking
must
be
replaced.
Check
each
connecting
rod
for
alignment
by
fitting
it
to
the
aligner
,
as
shown,
and
repair
it
by
cold.working
with
8
P'~SS'
as
neC"esslry
.
The
aligner
tells
whether
the
connecting
rod
is
twisted
01
bent beyond the limit.
,.
Chocking
connecting
rod
for
bend
Un
i
t:
mm
fi
n.)
I
tem
Standa
rd
Repair
limit
Conneoting rod align·
0.05 (0.002),
0.
15
ment (twist and bend)
ma
x.
(0.006)
MAINTENANCE
AND
ADJUSTMENT
---'
JlIOS
Checking
con
noct
ing
rod
fo
r twist
(b) Inspect each
big~nd
bearing for evidence
of
wip
i
ng
or
fatigue
f
ailUle,
fOJ
scratches
hy
dirt
particles
imbedded
in
an
d
for
improper
seating
on
the
bore.
Determine
whether
the
bearing
should
be
re·used
or
rep
laced
on
the
bas.is
of
finding$
.
(0) Check the r.dial clearance between crankpin
and
bearing
; jf the
repair
linti
t specified
below
is
exceeded
by
the
checked clearance.
repbce:
the
bearing.
Where
the
crankpin
Is
10
be
ground
to thl: nex! undersize,
tlS~
P replacement
bear
-
ing
of
tlla!.
undersize.
Unit
: mm lin.)
Standard
Repair
Item
limit
58 -{I.03;
-0
.
055
Crankpin
diameter
-00014
(2 .283
-0:0022)
Radial
clearance:
0.035 ~ 0.100
0.20
between
beanng
(0.0
014
-
00039)
(0.008) I
and
cr
an
k pin
_.
_ -
~
-
The
two
bearin
g u
nd
ersizes
.ll.re
0.25
rom
(0.00984
in
.)
and 0.50 mm (0.01969 in .).
As
in
the
ca
se
of
tbe
main
bearing,
the
clearance
is
to
be
detemlined from
lh~
crank pin diameter
(determined
as
described
ill
CRANKPIN
IN·
SPECTION) and also the diameter readings
taken
on
the
big.end
beanng
at
the
positjon
s
Indicated
and
in
the
manner
illustrated.
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