Alpina EA 1800 Manual De Instrucciones página 30

10
EN
1. CHECKS DURING WORK
• Checking the chain tension
The chain tends to stretch gradually as you work,
so you need to check its tension frequently.
IMPORTANT
During the first period of use
(or after replacing the chain), it must be checked
more frequently due to settling of the chain.
WARNING!
Never work with the chain
loose, as it can be hazardous if the chain slips
out of its guides.
To adjust the chain tension, follow the instructions
in Chapter 5.2.
• Checking the oil delivery
IMPORTANT
Never use the machine with-
out lubrication! You can check the oil level in the
tank through the transparent gauge. Make sure
you fill up the oil tank every time you use the ma-
chine.
WARNING!
Make sure the bar and the
chain are in place when you check the oil de-
livery.
Start the engine and check if the chain oil is deli-
vered as shown in the figure (Fig. 13).
2. DIRECTIONS FOR USE AND CUTTING
TECHNIQUES
Before felling or delimbing for the first time, practise
sawing logs on the ground or on trestles, so that
you can get familiar with the machine and the most
suitable sawing techniques.
WARNING!
Always hold the machine
with both hands when sawing.
WARNING!
Stop the engine immedia-
tely if the chain stops during sawing. Beware
of kickback, which can occur if the bar con-
tacts an obstacle.
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• Felling a tree
– When bucking and felling operations are being
– The chain saw operator should keep on the up-
– An escape path should be planned and cleared
– Before felling is started, consider the natural
– Remove dirt, stones, loose bark, nails, staples
• Notching undercut
Make the notch 1/3 the diameter of the tree, per-
pendicular to the direction of falls as illustrated in
Figure 16.
Make the lower horizontal notching cut first.
his will help to avoid pinching either the saw chain
or the guide bar when the second notch is being
made.
• Felling back cut
– Make the felling back cut at least 50 mm higher
– As the felling gets close to the hinge, the tree
USING THE MACHINE
performed by two or more persons at the same
time, the felling operations should be separated
from the bucking operation by a distance of at
least twice the height of the tree being felled.
Trees should not be felled in a manner that
would endanger any person, strike any utility
line or cause any property damage. If the tree
does make contact with any utility line, the com-
pany should be notified immediately.
hill side of the terrain as the tree is likely to roll or
slide downhill after it is felled.
as necessary before cuts are started. The e-
scape path should extend back and diagonally to
the rear of the expected line of fall as illustrated
in Figure 15.
lean of the tree, the location of larger branches
and the wind direction to judge which way the
tree will fall.
and wire from the tree.
than the horizontal notching cut as illustrated in
Figure 16. Keep the felling back cut parallel to
the horizontal notching cut. Make the felling back
cut so enough wood is left to act as a hinge. The
hinge wood keeps the tree from twisting and
falling in the wrong direction. Do not cut through
the hinge.
should begin to fall. If there is any chance that the
tree may not fall in desired direction or it may
rock back and bind the saw chain, stop cutting
before the felling back cut is complete and use
wedges of wood, plastic or aluminium to open
the cut and drop the tree along the desired line
of fall.