J08E
Second
Hand
Crankshaft
For
Excavator
SK350
-
8
13411
-
2241
For
Hino
Specification
Product
name:
Engine
crankshaft
|
Model
Number:
J08C
J08E
|
Application:
Excavator
|
Part
number:
134112241
|
Main
Journal:
80
|
valve:
24
valve
|
Road
Journal:
65
|
Number
of
Cylinders:
6
|
Cooling:
Water
cooling
|
Injection:
Electric
Injection
|
Description
of
Second
Hand
Crankshaft
What
is
a
Crankshaft?
A
crankshaft
is
a
mechanical
unit
that
transforms
the
reciprocating
movement
of
the
piston
into
rotary
motion.
A
crankshaft
connects
to
the
piston
through
a
connecting
rod.
The
main
objective
of
this
connecting
rod
is
to
receive
reciprocating
motion
by
the
piston
and
delivers
it
to
the
crankshaft.
As
the
crankshaft
gets
motion
by
the
connecting
rod,
it
transforms
this
motion
into
rotary
motion
and
rotates
the
flywheel,
which
further
moves
the
vehicle
wheels.
Without
a
crank,
a
reciprocating
engine
is
unable
to
deliver
piston’s
reciprocating
to
the
drive
shaft.
In
simple
words,
a
reciprocating
engine
can’t
move
a
vehicle
without
a
crankshaft.
The
crankshaft
works
on
the
crank
mechanism.
It
is
located
inside
the
block
of
the
engine.
The
crank
includes
in
the
moving
components
of
the
IC
engine.
It
has
many
crankpins
and
cranks.
The
engine
connecting
rod
attaches
with
the
crank
through
these
crankpins
and
cranks.
Components
of
Crankshaft
The
major
parts
of
the
crankshaft
are
given
below:
1.
Main
Journal
2.
Crankshaft
Pulley
3.
Oil
Passways
4.
Balance
Hole
5.
Counterweight
6.
Crankshaft
Lubrication
Main
Journal
The
main
bearing
journal
is
attached
to
the
block
of
the
engine.
This
engine
block
rotates
around
this
journal.
All
crankshaft
journals
are
very
hardened,
rounded,
and
smooth.
The
main
journal
secures
in
the
saddle,
where
a
replaceable
bearing
insert
will
be
placed.
The
bearing
is
softer
compared
to
the
main
journals,
and
these
can
change
when
it
wears.
The
bearing
designs
to
capture
a
small
volume
of
impurities
(if
any)
to
prevent
the
crankshafts
from
damage.
Then
main
bearing
cap
screws
onto
the
journal
and
tighten
to
the
particular
torque.
The
journal
of
the
engine
runs
over
the
oil
film.
This
oil
film
pushes
in
the
gap
between
the
bearing
and
the
journal
via
the
crankshaft
saddle’s
holes
and
the
linking
holes
of
the
bearing
insert.
If
there
are
sufficient
oil
delivery
and
pressure,
the
bearings
and
journals
will
not
come
into
contact.
