1
ENGINE
B1700·B2100·B2400 WSM,11770
Replacing Connecting
Rod
Small
End
Bushing
(When removing)
1.
Press
out
the small end bushing
with
a connecting rod small
end bushing replacing tool.
(When installing)
1.
Clean
a new small end bushing and bore, and apply engine
oil
to
them.
2.
Insert a new bushing
onto
the tool and press-fit
it
with
a
press
so
that
the
seam
(1)
of
bushing positions
as
shown in
the figure, until
it
is
flash
with
the connecting rod.
3.
Drill a hole
to
the bushing
with
aligning
the
oil hole
(2)
of
connecting rod using
4.0
mm
dia. (0.157 in. dia.) drill.
III
NOTE
..
Be
sure
to
chanfer the oil hole circumference
with
an
oil
stone.
B083F054
45°
(0.785rad.)
B083F055
(1)
Seam
(2) Oil Hole
J~
oOD
C019F054
o
Piston Ring
Gap
1.
Insert the piston ring
into
the lower part
of
the liner (the
least worn
out
part)
with
the piston.
2.
Measure the ring gap
with
a feeler gauge.
3.
Ifthe
gap exceeds the allowable limit, replace it.
III
IMPORTANT
.. Measure the piston ring gap
at
the
point
of
the minimum
inside diameter
ofthe
cylinder.
(0905,01005)
0.25toOAO
mm
0.0098
to
0.015 in.
Factory
spec.
Top ring
(01105)
Second
0.30
to
0.115
mm
ring
0.0118
to
0.0177 in.
Piston ring
gap
Allowable
limit
1.25mm
0.0492 in.
Factory
spec.
0.25
to
0.115
mm
0.0098toO.0177 in.
Oil ring
Allowable
limit
1.25mm
0.0492 in.
B083F135
Clearance between Piston
Ring
and Groove
1.
Remove
carbon from the ring grooves.
2.
Measure the clearance between
the
ring and
the
groove
with
a feeler gauge
or
depth gauge.
3.
If
the clearance exceed the allowable limit, replace the piston
nngs.
4.
If
the
clearance still exceeds
the
allowable
limit
after
replacing the ring, replace the piston.
Factory
spec.
0.085
to
0.112 mm
Second
0.00335
to
0.00441 in.
ring
Allowable
limit
0.20
mm
Piston ring
0.0079 in.
clearance
0.020
to
0.055
mm
Factory
spec.
0.00079
to
0.00217 in.
Oil ring
Allowable
limit
0.15mm
0.0059 in.
1-538
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