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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 off 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. Confi 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