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Do not use oil that has been already used or regenerated, as this may damage the oil pump. Use EP90 oil for the
whole year.
4. Operation and settings
4.1. Switching on. Switching off.
Switching on - press the switch lock button (2) and then switch button (1). In case the chain saw does not start,
release the brake lever (9).
4.2. Switching off - release pressure on the switch (1). Release pressure on the switch button (1) to stop the chain
saw. Strong sparking on the commutator may appear. This is normal and safe for chain saw operation.
When switched on, the chain saw starts to work with full speed.
4.3. 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. If there are no oil marks or they are very small,
clean oil outlet, upper hole of chain tension and oil way or contact service.
Depending on ambient temperature and amount of oil supplied, you can operate the chain saw for 15 to 40 minutes
per one filling the oil tank.
4.4. Chain lubricants.
Durability of chain and guide bar depends heavily on quality of lubricant. Use only lubricants, which are designed
for chain saws.
Never use regenerated or previously used oil for chain lubrication.
4.5. Chain guide bar.
Guide bar (7) 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.
4.6. 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
authorized service workshop.
4.7. Chain brake.
The saw features automatic brake, which stops the chain in case of recoil during chain saw operation. The brake
engages automatically when force of inertia is applied to a weight located inside the brake casing. The chain brake can
also be switched on manually, when the brake lever (9) is moved towards the guide bar (7). Switching the chain brake
stops the chain movement in 0.12 sec.
4.8. Braking check.
Ensure the brake operates correctly before each use of the saw.
Put operating saw on the ground and open the throttle fully for 1 - 2 seconds to allow the saw engine to operate at
its maximum speed.
Push the brake lever (7) forward. The chain should stop immediately.
In case the chain stops slowly or does not stop at all, replace the brake band and clutch drum before using the chain
saw again.
To release the brake, pull the brake lever (7) towards the main handle (3) so you can hear sound typical of blockade
snapping.
Ensure the chain brake operates correctly and the chain is sharp. It is very important for keeping potential recoil at
a safe level.
In case the brake does not operate efficiently, adjust it or repair in authorized service site.
In case the engine operates at high speed with the chain brake switched on, the saw clutch will overheat. When the
chain brake engages during operation of the engine, release the switch off immediately and stop the chain saw.
4.9. Chain tension adjustment.
Cutting chain tends to lengthen during operation due to higher temperature. Longer chain loosens and may slip off
the guide bar.
Ensure the chain (8) remains in the guiding groove of the guide bar (7).
Check the chain tension again (it should be possible to lift the chain by approximately 3 - 4 mm in the middle of the
guide bar).
Do not over-tension the chain. Adjustment of overly heated chain may lead to excessive tension when cooling down.
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