Stiga CS 20 Li B Manual De Instrucciones página 171

NOTE The machine works only with both
batteries inserted.
4. Disengage the chain brake (par. 5.3)
5. Press the throttle lock buttom (Fig. 14.B)
and throttle trigger lever. (Fig. 14.A).
6.4 WORKING
Before felling or delimbing for the first time, make
sure:
– to have been specifically trained to use this
type of equipment;
– to have carefully read the safety regulations
and user instructions contained in this
manual;
– you practise first on logs on the ground or
attached to trestles, in order to get familiar
with the machine and the most suitable
cutting techniques.
To use the machine proceed as follows:
• Always disengage the chain brake, pulling the
lever towards you before using the throttle.
• The machine must always be firmly held in both
hands, with the left hand on the front hand grip
and the right hand on the rear hand grip, even if
the operator is left-handed.
Stop the machine immediately if the
chain stops during sawing.
NOTE During use, the battery is protected
against total drainage with a protective device
that switches off the machine and stops it from
working.
NOTE If the chainsaw stops working during the
cutting, wait 15mins to cool down the machine,
then re-start it.
6.4.1 Checks to be conducted whilst
working
• Checking the chain tension
The chain tends to stretch gradually as you work,
so you need to check its tension frequently (par.
6.1.3).
• Checking the oil delivery
IMPORTANT Never use the machine without
lubrication!
Make sure the bar and the chain are in
place when you check the oil delivery.
Start the motor (par. 6.3) and check if the chain oil
is delivered as shown in (fig. 18).
6.5 FORESTRY WORK
6.5.1 Delimbing a tree
Make sure there is nothing or nobody in
the area where the branches will fall.
1. Stand opposite the branch you want to cut.
2. Start cutting lower branches
followed by the higher ones.
3. Make first cut from the bottom towards the
top (Fig. 19.A). Complete delimbing by cutting
from top to bottom, as shown in (Fig. 19.B).
6.5.2 Felling a tree
IMPORTANT Where two or more persons
are working together on felling and bucking
operations, such operations must be performed in
separate areas at a distance from each other of at
least 2.5 times the height of the tree being felled.
Do not fell trees if this involves risks of injuring
people, coming into contact with a power line or
causing any form of damage. If the tree should
come into contact with a main power line, report
the incident immediately to the network provider.
Before commencing the felling operations:
– it is necessary to evaluate the natural
inclination of the tree, the part where the
branches are larger and the wind direction, to
assess how the tree will actually fall;
– remove any dirt, stones, pieces of bark, nails,
metal staples and wire;
– clear the area around the tree and find a
stable place to stand;
– plan obstacle-free escape routes at a 45°
angle back and away from the direction of
the fall (Fig. 20) which allow the operator to
escape to a safe zone, about 2.5 times the
height of the tree being felled;
– Stand uphill of the land onto which the tree
will probably roll or fall over after felling.
• Performing a face notch
1. Stand to the right of the tree, behind the
chainsaw.
2. Saw a horizontal face notch to 1/3 of the
diameter of the tree, perpendicular to the
direction in which it will fall (Fig. 21. A).
• Felling back cut
1. Perform the felling back cut at least 5 cm
higher than the horizontal face notch (Fig.
22.B).
2. Perform the felling back cut leaving sufficient
wood to act as a "hinge" (Fig. 22.C). The
hinge wood will prevent the tree from twisting
EN - 11