SRelease the throttle trigger as soon as the cut is completed, allowing the en- gine to idle. If you run the saw at full throttle without a cutting load, unneces-
sary wear can occur to the chain, bar, and engine.
STo avoid losing control when cut is com-
plete, do not put pressure on saw at end of cut.
S Stop the engine before setting the saw down after cutting.
TREE FELLING TECHNIQUES
WARNING: Check for broken or dead branches which can fall while cutting causing serious injury. Do not cut near build- ings or electrical wires if you do not know the direction of tree fall, nor cut at night since you will not be ale to see well, nor during bad weather such as rain, snow, or strong winds, etc. If the tree makes contact with any utility line, the utility company should be notified immediately.
SCarefully plan your sawing operation in ad- vance.
SClear the work area. You need a clear area
all around the tree so you can have secure footing.
S Study the natural conditions that can cause the tree to fall in a particular direc- tion.
Natural conditions that can cause a tree to fall in a particular direction include:
SThe wind direction and speed.
S The lean of the tree. The lean of a tree might not be apparent due to uneven or sloping terrain. Use a plumb or level to de- termine the direction of tree lean.
SWeight and branches on one side. S Surrounding trees and obstacles.
Look for decay and rot. If the trunk is rotted, it can snap and fall toward the operator. Check for broken or dead branches which can fall on you while cutting.
Make sure there is enough room for the tree to fall. Maintain a distance of
Remove dirt, stones, loose bark, nails, sta- ples, and wire from the tree where cuts are to be made.
Plan a clear retreat path to the rear and diag- onal to the line of fall.
Plan a clear retreat path
Direction of Fall
45_
FELLING LARGE TREES (6 inches (15 cm) in diameter or larger)
The notch method is used to fell large trees. A notch is cut on the side of the tree in the de- sired direction of fall. After a felling cut is
made on the opposite side of tree, the tree will tend to fall into the notch.
NOTE: If the tree has large buttress roots, remove them before making the notch. If us- ing saw to remove buttress roots, keep saw chain from contacting ground to prevent dull- ing of the chain.
NOTCH CUT AND FELLING THE TREE
SMake notch cut by cutting the top of the notch first. Cut through 1/3 of the diameter of the tree. Next complete the notch by cut- ting the bottom of the notch. See illustra- tion. Once the notch is cut, remove the notch of wood from the tree.
Final cut here. 2 inches above
First cut center of notch.
Notch
Second cut
SAfter removing the wood from the notch, make the felling cut on the opposite side of the notch. This is done by making a cut about two inches higher than the center of the notch. This will leave enough uncut wood between the felling cut and the notch to form a hinge. This hinge will help prevent the tree from falling in the wrong direction.
Hinge holds tree on stump and helps control fall
Opening of felling cut
Closing of notch
NOTE: Before felling cut is complete, use wedges to open the cut when necessary to control the direction of fall. To avoid kickback and chain damage, use wood or plastic wedges, but never steel or iron wedges.
SBe alert to signs that the tree is ready to fall:
cracking sounds, widening of the felling cut, or movement in the upper branches.
SAs tree starts to fall, stop saw, put it down, and get away quickly on your planned re- treat path.
SDO NOT cut down a partially fallen tree with your saw. Be extremely cautious with partially fallen trees that may be poorly supported. When a tree doesn’t fall com- pletely, set the saw aside and pull down the tree with a cable winch, block and tackle, or tractor.
12