Felling A Tree; Notching Undercut - Ayce SF7J139D-2 Notice Originale

chain brake.
- Make sure the chain is tensioned correctly.
- Observe the size of wood shavings, if they become dusty your chain could need
sharpening.
Trimming a tree (pruning) (Fig.20)
Warning: Avoid kickback, kickback can result in severe injury or death.
Warning: Do not operate chain saw while
- in a tree.
- on a ladder or any other unstable surface.
- in any awkward position.
You may lose control of saw causing severe injury.
Warning: Do not cut limbs higher than your shoulders.
Trimming a tree is the process of cutting limbs from a living tree, makes sure your
footing is firm keep feet apart. Divide your weight evenly on both feet. Follow directions
below to trim a tree.
1. Make first cut 15 centimeters from tree trunk on underside of limb, use top of guide
bar to make this cut. Cut 1/3 through diameter of limb.
2. Move five to ten centimeters farther out on limb, make second cut from above limb.
Continue cut until you cut limb off.
3. Make third cut as close to tree trunk as possible on underside of limb stub. Use top
of guide bar to make this cut. Cut 1/3 through diameter of stub.
4. Make fourth cut directly above third cut. Cut down to meet third cut, this will remove
limb stub.
CAUTION: Seek professional help if facing conditions beyond your ability.
Instructions concerning the proper techniques for basic felling, limbing, and cross-
cutting
Fig.20

Felling a tree

When bucking and felling operations are being performed by two or more persons at the
same time, the felling operations should be separated from the bucking operation by a
distance of at least twice the height of the tree being felled. Trees should not be felled in
a manner that would endanger any person, strike any utility line or cause any property
damage. If the tree does make contact with any utility line, the company should be
notified immediately.
The chain saw operator should keep on the uphill side of the terrain as the tree is likely
to roll or slide downhill after it is felled.
An escape path should be planned and cleared as necessary before cuts are started. The
escape path should extend back and diagonally to the rear of the expected line of fall as
illustrated in Figure 21.
Before felling is started, consider the natural lean of the tree, the location of larger
branches and the wind direction to judge which way the tree will fall.
Remove dirt, stones, loose bark, nails, staples and wire from the tree.
Fig.21 Description of felling: escape routes

Notching undercut

Make the notch 1/3 the diameter of the tree, perpendicular to the direction of falls as
illustrated in Figure 22. Make the lower horizontal notching cut first. This will help to
avoid pinching either the saw chain or the guide bar when the second notch is being
made.
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