CRANKSHAFT
CRANKSHAFT
RUNOUT
Support crankshaft
by
"V"
blocks
CD,
with
the dial
gauge
®
rigged
to
read
the
runout
as
shown.
Service
Limit:
0.05 mm (0.0019 in)
Excessive crankshaft runout
is
often responsible
for
abnormal
engine vibration. Such vibration shortens engine life.
09900-21304: V-block
09900-20701: Magnetic stand
09900-20606: Dial
gauge
(1/100 mm)
CONDITION
OF BIG END
BEARING
Turn
the crankshaft
with
the conrod
to
feel the smoothness
of
rotary
motion
in the big end. Move the rod up and down while
holding the crankshaft rigidly
to
be
sure
that
there
is
no rattle
in the big end.
Wear
on the bid
eng
of
the conrod
can
be
estimated
by
check-
ing the movement
of
the small end
of
the rod. This method
can
also
check the extent
of
wear on the parts
of
the con rod's
big end.
If
wear exceeds the
limit,
conrod, crank pin and crank pin
bearing should all
be
replaced.
Service
Limit:
3.0
mm
(0.11 in)
CONROD
SMALL
END BORE 1.0.
Using a caliper
gauge,
measure
the conrod small
end
diameter.
Service
Limit:
20.0 mm (0.79 in)
09900-20605: Dial calipers
CLUTCH
PLATES
Clutch plates in service remain in
oily
condition
as
they were
lubricated
with
oil.
Because
of
this condition, both drive and
driven plates
are
subject
to
little
wearing action and therefore
last much longer.
Their
life depends largely on the
quality
of
oil
used
in the clutch and
also
on the way the clutch
is
oper-
ated.
ENGINE
3-34
Checking thickness
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