GreenWorks GS 110 Owner's Manual page 15

OPERATION
immediate area around the tree and make sure there are no obstructions in your planned
path of retreat. Clear the path of safe retreat approximately 135° from the planned line of
fall.
• Consider the force and direction of the wind, the lean and balance of the tree, and the
location of large limbs. These things influence the direction in which the tree will fall. Do
not try to fell a tree along a line different from its natural line of fall.
• Remove dirt, stones, loose bark, nails, staples, and wire from the tree where felling cuts
are to be made.
• Notched Undercut. Cut a notch about 1/3 the diameter of the trunk on the side of the tree.
Make the notch cuts so they intersect at a right angle to the line of fall. This notch should
be cleaned out to leave a straight line. To keep the weight of the wood off the saw, always
make the lower cut of the notch before the upper cut.
• Felling Backcut. As the felling cut gets close to the hinge, the tree should begin to fall.
If there is any chance the tree may not fall in the desired direction or it may rock back
and bind the saw chain, stop cutting before the felling cut is complete and use wedges
of wood, plastic or aluminum to open the cut and drop the tree along its desired line of
fall. Make the backcut level and horizontal, and at a minimum of 2 in. (5 cm) above the
horizontal cut of the notch.
• On large diameter trees, stop the back cut before it is deep enough for the tree to either
fall or settle back on the stump. Then insert soft wooden or plastic wedges into the cut so
they do.
• As tree starts to fall, stop the chainsaw and put it down immediately. Retreat along the
cleared path, but watch the action in case something falls your way.
Planned
Line of fall
Back cut
Path of
safe
retreat
Back cut 2" (5cm)
Hinge
Wedge
15
HINGE
2 in. (5 cm) OR 1/10 DIA
Notch-
Approx.
1/3
Diameter
of trunk