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17
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.
A
djust 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 1/4 of a turn
-
H screw: by 1 3/8 of a turn
•
Start up the engine and allow it to heat up while holding throttle
lever (
11
) pressed in half.
•
A
fter 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.
•
I
n 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
).
•
A
t the contact with the wooden object, the chain brake should
engage (brake lever (
6
) moves forward to the O
N
position).
Ensure the chain brake operates correctly before starting any task.
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 throttle lever
immediately and keep engine speed at low level.
CHAIN TENSION ADJUSTMENT
Cutting chain tends to lengthen during operation due to higher
temperature. Longer chain loosens and may slip off the guide bar.
•
Loosen the guide bar fixing nuts (
7
).
•
Ensure the chain (
21
) remains in the guiding groove of the guide
bar (
20
).
•
Use a screwdriver to turn the chain tension adjustment screw
(
8
) clockwise, until the chain is strained appropriately (it should
slightly hold the guide bar in horizontal position).
•
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)
(
fig. I
).
•
Tighten firmly the guide bar fixing nuts (
7
).
Do not over-tension the chain. Adjustment of overly heated chain
may lead to excessive tension when cooling down.
OPERATING THE CHAIN SAW
•
Before starting any planned task, familiarize yourself with section
describing safe rules for chain saw operation.
I
t is recommended
to gain experience by cutting waste wood pieces.
I
t will also allow
to find out the chain saw possibilities.
•
A
lways observe safety regulations.
•
Use the chain saw only for cutting wood. Cutting other materials
is forbidden.
•
I
ntensity of vibrations and recoil change depending on the type
of wood being cut.
•
Do not use the chain saw as a lever to lift, move or split objects.
When the chain is pinched in wood, switch off the engine and
drive wooden or plastic wedge into the processed piece to release
the chain saw (
fig. J
). Start the tool again and commence cutting
carefully.
•
Do not fix the saw to a stationary work station.
•
A
ttaching other devices, which are not allowed by the chain saw
manufacturer, to the chain saw drive is forbidden.
•
I
t is not necessary to apply big force to the chain saw when using
the tool.
A
pply light pressure only while the engine operates with
the throttle fully opened.
When the chain saw is pinched in kerf during cutting, do not
remove it forcefully. It may cause loss of control over the chain
saw, operator injury and/or damage to the chain saw.
Release the chain brake before starting to work.
•
Press the throttle lever lock (
1
) and throttle lever (
11
) (wait until
engine reaches its full speed before starting to cut).
•
Keep maximum speed for the whole time.
•
A
llow the chain to cut wood. Press down the saw lightly (
fig. K
).
•
Stop pressing the saw at the end of the cut to avoid loosing
control over the tool.
•
When the cutting has been finished release the throttle lever (
11
)
and allow the engine to run idle.
•
Switch off the engine before putting the chain saw away.
Keeping high speed of the engine when not cutting wood causes
unnecessary losses and wear of parts.
PROTECTION AGAINST RECOIL
Recoil is movement of the guide bar of the chain saw up and/or
back, which happens when the part of the chain on the guide bar
tip encounters an obstacle.
•
Ensure the processed material is firmly fixed.
•
Use clamps to fix the material.
•
Hold the chain saw with both hands when starting up and during
operation.
•
During recoil the chain saw cannot be controlled and the chain is
loosened (
fig. L
).
•
I
ncorrectly sharpened chain increases risk of recoil.
•
Do not cut above level of your shoulders.
Avoid cutting with guide bar tip, it may cause sudden recoil – to
the back and up. Always use complete safety equipment and
appropriate working clothes when operating the chain saw.
Disassembly of protections, inappropriate operation,
maintenance, improper guide bar or chain replacement may
contribute to increase of risk of body injury in case of a recoil.
Never modify the saw in any way. By using modified chain saw,
the user looses all warranty rights. Warranty voids also when the
chain saw is used inaccordingly to information contained in this
manual.
