Husqvarna 36 - Manual (Page 20)

General working instruction
Basic rules for felling trees
Normally the felling consists of two main cutting operations -
notching and making the felling cut.
Notching
Start making the upper notch cut on the side of the three facing
the felling direction.
Look through the kerf as you saw the lower cut so you do not saw
too deep into the trunk.
The notch should be deep enough to create a hinge of sufficient
width and strength. The notch opening should be wide enough to
direct the fall of the tree as long as possible.
Felling cut
Saw the felling cut from the other side of the tree and (3-5 cm)
above the edge of the notch.Never saw completely through the
trunk. Always leave a hinge. The hinge guides the tree. If the
trunk is completely cut through, you lose control over the felling
direction.
Insert a wedge or a felling lever in the cut well before the tree
becomes unstable and starts to move. This will prevent the
guidebar from binding in the felling cut if you have misjudged the
failing direction. Make sure no people have come into the range
of the falling tree before you push it over.
Felling cut, trunk diameter less than guide
bar length
Saw either with a pushing chain (top of guide bar) ... or with a
pulling chain (bottom of guide bar).
Felling cut, trunk diameter greater than guide
bar length
Make a boring cut. Watch out for kickbacks. Do not use the upper
tip quadrant of the guide bar tip.
Saw with a pushing chain. Leave a sufficient hinge.
Complete the felling cut by sawing around the trunk with a pulling
chain.
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