6
English
CAUTION
PROPER
TENSION
IS
EXTREMELY
IMPORTANT
8.
Raise
the
bar
end
and
securely
tighten
the
guide
bar
clamp
nuts
with
the
combi
box
spanner.
(
Fig.
7
)
9.
A
new
chain
will
stretch
so
adjust
the
chain
after
a
few
cuts
and
watch
chain
tension
carefully
for
the
fi
rst
half
hour
of
cutting.
NOTE
Check
the
chain
tension
frequently
for
optimum
performance
and
durability.
CAUTION
○
When
the
chain
is
excessively
tightened,
the
bar
and
chain
will
be
damaged
rapidly.
Conversely,
when
the
chain
is
excessively
loosened,
it
may
get
out
of
the
groove
in
the
bar.
○
Always
wear
gloves
when
touching
the
chain.
WARNING
During
operation,
hold
chain
saw
fi
rmly
with
both
hands.
A
single
hand
operation
may
cause
serious
injury.
OPERATING
PROCEDURES
Fuel
(Fig.
8)
Fig.
8
WARNING
○
The
chain
saw
is
equipped
with
a
two-stroke
engine.
Always
run
the
engine
on
fuel,
which
is
mixed
with
oil.
Provide
good
ventilation,
when
fueling
or
handling
fuel.
○
Fuel
contains
highly
fl
ammable
and
it
is
possible
to
get
the
serious
personal
injury
when
inhaling
or
spilling
on
your
body.
Always
pay
attention
when
handling
fuel.
Always
have
good
ventilation
when
handling
fuel
inside
building.
Fuel
○
Always
use
branded
89
octane
unleaded
gasoline.
○
Use
genuine
two-cycle
oil
or
use
a
mix
between
25:1
to
50:1,
please
consult
the
oil
bottle
for
the
ratio
or
HITACHI
dealer.
○
If
genuine
oil
is
not
available,
use
an
anti-oxidant
added
quality
oil
expressly
labeled
for
air-cooled
2-cycle
engine
use
(JASO
FC
GRADE
OIL
or
ISO
EGC
GRADE).
Do
not
use
BIA
or
TCW
(2-stroke
water-cooling
type)
mixed
oil.
○
Never
use
multi-grade
oil
(10
W/30)
or
waste
oil.
○
Always
mix
fuel
and
oil
in
a
separate
clean
container.
Always
start
by
fi
lling
half
the
amount
of
gasoline,
which
is
to
be
used.
Then
add
the
whole
amount
of
oil.
Mix
(shake)
the
fuel
mixture.
Add
the
remaining
amount
of
gasoline.
Mix
(shake)
the
fuel-mix
thoroughly
before
fi
lling
the
fuel
tank.
Fueling
WARNING
(Fig.
9)
○
Always
shut
o
ff
the
engine
before
refueling.
○
Slowly
open
the
fuel
tank
(15),
when
fi
lling
up
with
fuel,
so
that
possible
overpressure
disappears.
○
Tighten
the
fuel
cap
carefully,
after
fueling.
○
Always
move
the
unit
at
least
3
m
from
the
fueling
area
before
starting.
○
Always
wash
any
spilled
fuel
from
clothing
immediately
with
soap.
○
Be
sure
to
check
any
fuel
leaking
after
refueling.
Before
fueling,
clean
the
tank
cap
area
carefully,
to
ensure
that
no
dirt
falls
into
the
tank.
Make
sure
that
the
fuel
is
well
mixed
by
shaking
the
container,
before
fueling.
3.
Install
the
guide
bar
(5)
onto
the
bolts
(6),
then
push
it
toward
the
sprocket
(7)
as
far
as
it
will
go.
6
9
10
8
11
5
7
4
Fig.
4
4.
Con
fi
rm
the
direction
of
saw
chain
(12)
is
correct
as
in
the
fi
gure,
and
align
the
chain
on
the
sprocket.
(
Fig.
5
)
12
Fig.
5
5.
Guide
the
chain
drive
links
into
the
bar
groove
all
around
the
bar.
6.
Install
the
side
case
(4)
onto
the
bolts
(6).
Make
sure
that
the
boss
of
chain
tension
adjust
bolt
(8)
fi
ts
into
the
hole
(9)
of
the
bar.
(
Fig.
4
)
The
brake
lever
(11)
of
the
side
case
must
fi
t
the
groove
(10)
on
the
side
of
the
front
hand
guard.
Then
tighten
the
guide
bar
clamp
nuts
(3)
by
hand
that
allows
the
guide
bar
end
to
move
up
and
down
easily.
(
Fig.
3
)
7.
Raise
the
bar
end,
and
tighten
the
chain
(12)
by
turning
the
tension
adjustment
bolt
(13)
clockwise.
To
check
proper
tension,
lightly
lift
up
the
center
of
chain
and
there
should
be
about
0.5
–
1.0
mm
clearance
(14)
between
bar
and
edge
of
drive
link.
(
Fig.
6,
7
)
12
14
13
0.5
–
1
mm
Fig.
6
Fig.
7
000Book̲CS51EA̲Eng.indb 6
000Book̲CS51EA̲Eng.indb 6
2011/09/04 16:26:46
2011/09/04 16:26:46
