Husqvarna 120i Operator's Manual page 19

To fell a tree
Husqvarna recommends you to make the directional
cuts and then use the safe corner method when you fell
a tree. The safe corner method helps you to make a
correct felling hinge and control the felling direction.
WARNING: Do not fell trees with a diameter
that is more than two times larger than the
guide bar length. For this, you must have
special training.
To make the directional cuts
1. Make the directional cuts. Run the directional cuts
1/4 of the diameter of the tree. Make a 45° angle
between the top cut and bottom cut.
a) Make the top cut first. Align the felling direction
mark (A) of the product with the felling direction
of the tree (B). Stay behind the product and keep
the tree on your right side. Cut with a pull stroke.
b) Make the bottom cut. Make sure that the end of
the bottom cut is at the same point as the end of
the top cut. (Fig. 78)
2. Make sure that the directional cut line is perfectly
horizontal and at right angles (90°) to the felling
direction. The directional cut line goes through the
point where the two directional cuts touch. (Fig. 79)
To make the felling cut
Note: The felling cut is made on the opposite side of the
tree from the directional cuts.
1. Make the felling cut approximately 3-5 cm/1.5-2 in
above the bottom directional cuts. The cut must be
perfectly horizontal. (Fig. 80)
2. If you have a spiked bumper, put it behind the felling
hinge.
3. Cut on the pull stroke, use full power and forward the
saw chain/guide bar slowly into the tree. Make sure
that the tree does not fall in an unwanted direction.
4. Operate a wedge or breaking bar into the cut when
the cut has accurate depth. (Fig. 81)
5. Complete the felling cut parallel with the directional
cut line. Make sure that the distance between them
is at a minimum of 1/10 of the trunk diameter. The
section of the trunk that is not cut is the felling hinge.
The felling hinge controls the felling direction. (Fig.
82)
WARNING: You have no control of the
felling direction if the felling hinge is
gone or if it is too thin. This also applies
to if you have not made the directional
cuts and felling cut correctly.
(Fig. 83)
1259 - 001 - 11.07.2019
6. At this time, the tree will fall by its own force or with
the aid of a wedge or breaking bar. (Fig. 84)
Note: Use a guide bar that is longer than the diameter of
the tree. This helps you to make the felling cut and
directional cuts with one cutting stroke each. See
Accessories on page 26 to find out which bar lengths
we recommended for your product.
(Fig. 85)
To free a trapped tree
WARNING: It is very dangerous to remove a
trapped tree and there is a high accident
risk. Keep out of the risk zone and do not try
to fell a trapped tree.
(Fig. 86)
The safest procedure is to use one of the following
winches:
• Tractor-mounted (Fig. 87)
• Portable (Fig. 88)
To cut trees and branches that are in tension
1. Figure out which side of the tree or branch that is in
tension.
2. Figure out where the point of maximum tension is.
(Fig. 89)
3. Examine which is the safest procedure to release the
tension.
Note: In some situations the only safe procedure is
to use a winch and not your product.
4. Keep a position where the tree or branch can not hit
you when the tension is released. (Fig. 90)
5. Make one or more cuts of sufficient depth necessary
to decrease the tension. Cut at or near the point of
maximum tension. Make the tree or branch break at
the point of maximum tension. (Fig. 91)
WARNING: Do not cut straight through a
tree or branch that is in tension.
WARNING: Be very careful when you
cut a tree that is in tension. There is a
risk that the tree moves quickly before or
after you cut it. Serious injury can occur
if you are in an incorrect position or if
you cut incorrectly.
6. If you must cut across tree/branch, make 2 to 3 cuts,
1 in. apart and with a depth of 2 in. (Fig. 92)
7. Continue to cut more into the tree until the tree/
branch bends and the tension is released. (Fig. 93)
8. Cut the tree/branch from the opposite side of the
bend, after the tension is released.
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