GRAPHITE 58G950 Instrucciones De Uso página 27

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.
ADJUSTMENT OF CARBURETTOR
Chain saw carburettor is factory set, however it may require precise adjustment when operating conditions
change. Before starting to adjust the carburettor ensure new air filter and fuel filter are installed and tank is
filled with appropriate fuel blend.
Adjust the carburettor with guide bar and chain installed.
Screw in both adjustment screws (L and H) (16) until stop (do not overtighten) (fig. G).
First, unscrew two adjustment screws (16) as specified below:
- L screw: by 1
1 / ± 1 /
2 4
- H screw: by 1
1 / ± 1 /
4 4
Start up the engine and allow it to heat up while holding throttle lever (11) pressed in half.
After the engine has been heated, release pressure on the throttle lever (11) and allow the engine to run slowly.
Turn the screw (L) slowly clockwise until idle run achieves its maximum speed, then turn the screw
counter-clockwise by 1/4 of a turn.
Turn low speed adjustment screw (T) (17) counter-clockwise until the chain stops moving. When slow
speed appears to be too low, turn the screw clockwise (fig. G).
Avoid touching the muffler. Hot muffler may cause severe burns.
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 (6) is moved towards the guide bar
(20). Switching the chain brake stops the chain movement in 0.12 sec.
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 (6) 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 (6) towards the main handle (12) 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.
CHECKING BRAKE ENGAGEMENT
During this check the saw engine should be switched off.
Lift the saw while holding the front handle (5) and main handle (12) approximately 35 cm above wooden
object.
Let the front handle (5) go and allow the guide bar to tilt under its own weight and touch the wooden
object (fig. H).
of a turn
of a turn
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