GRAPHITE 89G940 Manual Del Usuario página 16

• Install the guide bar (20) (slide it behind the clutch) onto guiding
screws (c) and push towards driving chain wheel (fig. B).
• Put the chain (21) onto guide bar chain wheel (22) from below.
• Move the guide bar (20) away from the driving chain wheel, so
chain guiding links are placed in the guide bar groove.
• Ensure the pin (a) of the chain tension adjustment screw (8) is in
the middle of the lower hole (b) of the guide bar (20), adjust when
necessary (fig. B).
• Place the casing (10) in its place and fix by slightly tightening
guide bar fixing nuts (7).
• Strain the chain appropriately using the chain tension adjustment
screw (8). Chain tension is appropriate when the chain can be
lifted by 3 to 4 mm in the middle of the guide bar in horizontal
position.
• Firmly tighten guide bar fixing screws (7) while holding the guide
bar tip.
Prior to guide bar and chain installation ensure that position of
chain cutting blades is appropriate (correct position of the chain
on the guide bar is shown on the tip of the guide bar). Always wear
protective gloves during checks and installation of the chain to
prevent cuts from sharp edges of the chain.
New chain requires start-up period, which lasts approximately 5
minutes. Chain lubrication is very important in this phase. Check
chain tension after start-up period and readjust if necessary.
Check and adjust the chain tension frequently. Too loose chain
can easily slide off the guide bar, quickly wear out or quickly wear
out the guide bar.
FILLING SAW TANK WITH OIL
Oil tank in new chain saw is empty. Fill the tank with oil prior to first
use.
• Unscrew oil filler plug (18).
• Pour in maximally 260 ml of oil (be careful to avoid contamination
of oil during filling of the tank).
• Screw oil filler plug (18).
Do not use oil that has been already used or regenerated, as this
may damage the oil pump. Use SAE 10W/30 oil for the whole year,
or SAE 30W/40 in summer and SAE 20W/30 in winter.
FILLING THE FUEL TANK
When filling the fuel, follow these rules:
• Engine must not work,
• You must not spill the fuel.
Accordingly to the below table, mix petrol (lead-free with octane
number 95) with good quality engine oil for two stroke engines.
RECOMMENDED FUEL BLEND RATIO
Working conditions
First 20 hours of operation
After 20 hours of operation
• Unscrew fuel filler plug (15).
• Pour in previously prepared fuel blend (max. 550 ml).
• Screw fuel filler plug (15).
Most problems with combustion engines result directly or
indirectly from fuel used. You must not use oil designed for four-
stroke engines to prepare fuel blend.
OPERATION / SETTINGS
STARTING THE ENGINE
Hold the chain saw with both hands during operation.
• Check level in the fuel tank and the oil tank.
• Ensure the brake lever (6) is in the switched on position (moved
to the front).
• When engine is cold, pull out choke cable (2).
• Set the ignition switch (14) to switched on position (fig. C).
• Place the saw on stable ground.
• While holding the saw pressed against ground, pull the starter line
(13). First slowly so to hear the clutch gears, then pull it strongly
(fig. D).
• After starting the saw, press the throttle lever lock (1) and
throttle level (11) slightly (choke cable will move automatically to
switched off position).
• Allow the engine to heat up with throttle lever (11) slightly
pressed.
• Move the brake lever (6) to switched off position (to the back).
• Make a cut.
In case the engine does not start at the first try, pull out the choke
cable (2) halfway and pull the starter line again.
Do not start the engine while holding the saw in hands. During
start up the chain saw must rest on ground and be held firmly.
Ensure the chain is free to move without touching any object. Do
not cut any material with choke cable pulled out.
STOPPING THE ENGINE
• Release the throttle lever (11) and allow the engine to run idle for
a few minutes.
• Set the ignition switch (14) to STOP position.
CHECKING CHAIN LUBRICATION
Check lubrication of the chain and oil level in the tank before
starting to work. Switch on the saw and hold it above ground. If you
see enlarging oil marks, the chain lubrication works well (fig. E). If
there are no oil marks or they are very small, use oil feed adjustment
screw (9) to make appropriate adjustments. In case the adjustment
brings no effects, clean oil outlet, upper hole of chain tension and
oilway, or contact service.
Make adjustments when the saw is switched off, observe
precaution measures and do not allow the guide bar to touch
ground. Operate the tool safely and maintain at least 20 cm
distance from ground.
Use oil feed adjustment screw (9) to set amount of supplied oil
accordingly to respective operating conditions.
• MIN position – oil flow decreases.
• MAX position – oil flow increases (fig. F).
When cutting hard and dry wood and using whole length of the
guide bar when making a cut, set the oil feed adjustment screw (9)
to the MAX position.
You can reduce amount of oil supplied by turning oil feed
adjustment screw (9) to MIN position, when cutting soft and damp
wood, or when only part of the working length of the guide bar is
used.
Oil tank should be almost empty when the fuel tank is emptied.
Petrol : oil When filling the fuel remember about filling oil tank as well.
CHAIN LUBRICANTS
20 : 1
Durability of chain and guide bar depends heavily on quality of
25 : 1
lubricant. Use only lubricants, which are designed for chain saws.
Never use regenerated or previously used oil for chain lubrication.
CHAIN GUIDE BAR
Guide bar (20) is exposed to heavy wear especially in tip and bottom
part. To prevent side wear due to friction, it is recommended to turn
over the guide bar every time the chain is sharpened. Clean the
guide bar groove and oil holes on that occasion. Guide bar groove is
rectangular. Check the groove against wear. Put rule to guiding strip
and outer surface of a chain tooth. If you observe distance between,
the groove is correct. Otherwise the guide bar is worn out and needs
to be replaced.
CHAIN WHEEL
Driving chain wheel is subject to especially heavy wear. Replace the
chain wheel when you observe clear signs of wear of wheel teeth.
Worn chain wheel additionally reduces durability of chain. Chain
wheel should be replaced by authorised service workshop.
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