Fig. 5-6
To
install piston
with connecting rod, cannot be pulled
out
upward (that
is,
toward cylinder head),
but
through
the
bottom
of
cylinder
with crank shaft off.
To
install piston coupled with con·
necting rod, press
it
into cylinder from
below, then install crank shaft. To
install piston, use
the
special tools. But
don't
forget
to
coat
it
with oil
in
advance.
3-2
How
to
couple piston with connecting rod
Pistons and connecting rods are marked with serial numbers,
No.1,
No.2,
No.3
and
No.4,
according
to
their arrangement
as
seen from timing tear case.
How
to
couple together each pair and
to
set
in
cylinder crank-case
is
illustrated on
the
right.
3·3
How
to
remove and install piston pins
Fitting
of
piston pin
is
such
that
does
not
permit it
to
be pressed in
by
hand
at
normal temperature. So, warm up piston in boiling water
to
expand the inner diam,
of
piston pin hole, then remove it or install by hand. Never hammer it in cold piston.
Arrangement
of
piston rings on piston
is
an shwon in Fig. 5-8.
I
7
Combustion
chamber side
Fig. 5-7 How
to
couple piston
and
connecting rod
1.
Compression
ring
2.
Oil ring
Fig. 5-8 Arrangement
of
piston rings
72
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