ST A 3700 Manual De Instrucciones página 23

USING THE MACHINE
– Use the accelerator level to keep the chain
moving, push the brake lever forwards using
the back of you left hand; the chain must stop
immediately.
– When the chain has stopped, immediately re-
lease the accelerator lever.
– Release the brake.
CHECKING THE CHAIN TENSION
The chain tends to stretch gradually as you work,
so you need to check its tension frequently.
WARNING!
loose, as it can be hazardous if the chain slips
out of its guides.
CHECKING THE OIL DELIVERY
IMPORTANT
out lubrication! The oil tank may get almost empty
every time the fuel runs out. Make sure you top up
the oil tank every time you refuel the chain-saw.
WARNING!
chain are in place when you check the oil de-
livery.
Start the engine, keep it running at medium power
and check if the chain oil is delivered as shown in
the figure (Fig. 12).
You can adjust the chain oil flow using a screw-
driver on the adjuster screw (1 or 1a) of the oiler,
which is on the bottom of the machine (Fig. 12).
DIRECTIONS FOR USE AND CUTTING
TECHNIQUES
Before felling or delimbing for the first time, prac-
tise sawing logs on the ground or on trestles, so
that you can get familiar with the machine and the
most suitable sawing techniques.
WARNING!
be firmly held in both hands, with the left hand
on the front handgrip and the right hand on
the rear handgrip, even if the operator is left-
handed.
WARNING!
ately if the chain stops during sawing. Beware
of kickback, which can occur if the bar con-
tacts an obstacle.
Never work with the chain
Never use the machine with-
Make sure the bar and the
The machine must always
Stop the engine immedi-
Kickback occurs when the tip of the chain
comes in contact with an object or when the
wood contracts and jams the chain during
sawing.
This contact with the tip of the chain can cause
a rapid backward motion, pushing the guide
bar up and towards the operator. This also
happens when the chain is jammed along the
upper part of the bar. In both cases, kickback
can cause the operator to lose control of the
chain-saw, leading to serious consequences.
• Delimbing (Fig. 13)
WARNING!
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. Cut downwards to prevent the bar from getting
jammed.
• Felling (Fig. 14)
WARNING!
always stand uphill from the tree and check
that the felled trunk cannot cause damage if it
rolls down the hill.
1. Decide where the tree should fall – you should
consider the wind, the natural lean of the tree,
the position of the heaviest branches and how
easy the work is after felling, etc.
2. Clear the area around the tree and find a stable
place to stand.
3. Plan obstacle-free escape routes at a 45° angle
back and away from the direction of fall. These
routes must allow you reach a safe area at a
distance of about 2.5 times the length of the
tree to be felled
4. On the side of the fall, mark a felling notch
around a third of the trunk's diameter.
5. Cut the tree on the other side, slightly above the
bottom of the notch, leaving the uncut wood to
act as a "hinge" (1) of approx. 5-10 cm.
6. Reduce the thickness of this hinge without pull-
ing out the bar, until the tree falls.
EN
Make sure there is nothing
When felling on slopes,
11