Maintenance - Husqvarna 120 Operator's Manual

(Fig. 67)
WARNING: Be careful when you cut with the
guide bar tip. Start to cut with the lower
section of the guide bar tip as you make a
bore cut into the trunk.
(Fig. 68)
1. If the usable cutting length is longer than the tree
diameter, do these steps (a-d).
a) Make a bore cut straight into the trunk to
complete the felling hinge width. (Fig. 69)
b) Cut on the pull stroke until ⅓ of the trunk is left.
c) Pull the guide bar 5-10 cm/2-4 in rearward.
d) Cut through the remaining of the trunk to
complete a safe corner that is 5-10 cm/2-4 in
wide. (Fig. 70)
2. If the usable cutting length is shorter than the tree
diameter, do these steps (a-d).
a) Make a bore cut straight into the trunk. The bore
cut must extend 3/5 of the tree diameter.
b) Cut on the pull stroke through the remaining
trunk. (Fig. 71)
c) Cut straight into the trunk from the other side of
the tree to complete the felling hinge.
d) Cut on the push stroke, until ⅓ of the trunk is left,
to complete the safe corner. (Fig. 72)
3. Put a wedge in the kerf straight from behind. (Fig.
73)
4. Cut off the corner to make the tree fall.
Note: If the tree does not fall, hit the wedge until it
does.
5. When the tree starts to fall, use the path of retreat to
move away from the tree. Move a minimum of 5
m/15 ft away from the tree.
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.
Introduction
WARNING: Read and understand the safety
chapter before you do maintenance on the
product.
18
(Fig. 74)
The safest procedure is to use one of the following
winches:
• Tractor-mounted
(Fig. 75)
• Portable
(Fig. 76)
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. 77)
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. 78)
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. 79)
6. If you must cut across tree/branch, make 2 to 3 cuts,
1 in. apart and with a depth of 2 in. (Fig. 80)
7. Continue to cut more into the tree until the tree/
branch bends and the tension is released. (Fig. 81)
8. Cut the tree/branch from the opposite side of the
bend, after the tension is released.

Maintenance

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.
1063 - 002 - 06.03.2019