Operating Procedures - Hitachi CS 33EDT Handling Instructions Manual

OPERATING PROCEDURES

Operator safety
WARNING
This chain saw (CS33EDT) is designed especially for tree care and
surgery. Only persons trained in tree care and surgery may use
this saw. Observe all literature, procedures and recommendations
from the relevant professional organization. Failure to do so
constitutes a high accident risk. We recommend always using
a rising platform for sawing in trees. Rappelling techniques are
extremely dangerous and require special training. The operator
must be trained in and familiar with the use of safety equipment
and working and climbing techniques. Always use the restraining
equipment for both the operator and the saw.
Fuel (Fig. 10)
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 is highly fl ammable and it is possible to get the seriously
injured 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 Authorized
Service Centers.
○ 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.
○ Never mix fuel and oil in machine's fuel tank. 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.
Mixing amount of two-cycle oil and gasoline
Gasoline (Liter)
Ratio 50:1
0.5
1
2
4
Fueling (Fig. 11)
WARNING
○ Always shut off the engine and let it cool for a few minutes before
refueling.
Do not smoke or bring fl ames or sparks near the fueling site.
○ Slowly open the fuel tank (15), when fi lling up with fuel, so that
possible overpressure disappears.
○ Tighten the fuel tank 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.
Chain oil (Fig. 11)
WARNING
Never use waste or regenerated oil. If you use them, it will cause
damage to your health or this unit.
Two-cycle oil (ml)
Ratio 25:1
10 – 20
20 – 40
40 – 80
80 – 160
Slowly open the oil tank (16), and fi ll up with chain oil. Always use
high quality chain oil. When the engine is running, the chain oil is
automatically discharged.
Fill up the oil tank (16) with chain oil every time when refueling.
NOTE
When pouring fuel or chain oil into the tank, place the unit with
cap side up. (Fig. 11)
Chain brake operation (Fig. 2, 13)
Chain brake is designed to activate in an emergency such as kick-
back action.
Application of brake is made by moving the front hand guard (2)
towards the guide bar. During the chain brake operation, even if the
throttle lever is pulled, the engine speed does not increase and the
chain does not turn. To release the brake, pull the front hand guard
toward the front handle.
If the engine keeps rotating at high speed with the brake engaged,
the clutch will overheat causing trouble.
When the brake engages during operation, immediately release the
throttle lever to slow down the engine.
How to confi rm the activation of the chain brake (Fig. 12)
1) Turn off the engine.
2) Holding the chain saw horizontally, release your hand from the front
handle, hit the tip of the guide bar to a stump or a piece of wood, and
confi rm brake operation. Operating level varies by bar size.
In case the brake is not eff ective, ask Hitachi Authorized Service
Centers for inspection and repairs.
Starting the cold engine (Fig. 2, 13-17)
CAUTION
Before starting, make sure that the guide bar/chain does not
touch anything.
1. Push the front hand guard (2) so that the brake is engaged.
(Fig. 13)
2. Set stop switch (17) to ON position. (Fig. 14)
3. Push priming pump (18) approximately ten times so that fuel
fl ows into carburetor. (Fig. 15)
4. Turn the choke lever (19) to set it in the START position (
(Fig. 15) This will automatically lock to half-throttle.
5. Pull recoil starter (20) rapidly, taking care to keep the handle in
your grasp and not allowing the handle to snap back. (Fig. 16)
6. When you hear fi rst ignition, turn the choke lever (19) to set it in
the RUN position ( ). (Fig. 15)
NOTE
When the choke lever is put back to the RUN position (
the START position ( ) by hand, the throttle lever will be kept
half-open (half-throttle).
7. Pull recoil starter (20) rapidly again in the aforementioned
manner. (Fig. 16)
NOTE
If engine does not start, repeat procedures from 4 to 7.
8. As soon as the engine starts, pull throttle lever (22) full once with
the throttle lever lockout (21) pressed and immediately release
the throttle lever (22). Then half-throttle is disengaged. (Fig. 17)
9. Pull the front hand guard (2) so that the brake is disengaged.
(Fig. 2)
Allow the engine about 2-3minutes to warm up before subjecting
it to any load.
Do not run the engine at high speed without the load to avoid
shortening the life of the engine.
Starting the warm engine
Use only 1, 2, 7, and 9 of the starting procedure for a cold engine.
If the engine does not start, use the same starting procedure as for
a cold engine.
Chain lubrication test (Fig. 18)
Check that chain oil is discharged properly. When the saw chain
starts to revolve, point the head of the guide bar to a stump, etc.,
and pull the throttle lever to perform high-speed operation for around
10 seconds. If chain oil is sprayed over the stump, it is discharged
properly.
WARNING
Do not carry the machine with the engine running.
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