Poulan 1420 Manuel d'utilisateur télécharger pdf (Page 9)

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S Make sure there is enough room for

thetreetofall.Maintainadistanceof

2-1/2 tree lengths from the nearest per-

son or other objects. Motor noise can

drown out a warning call.

S Remove d irt, stones, loose bark, nails,

staples, and wire from the tree where

cuts are to be made.

Direction of Fall

45_

Plan a clear retreat path

FELLING LARGE TREES

(6 inches in diameter or larger)

The notch method is used to fell large

trees. A notch is cut on the s ide of the

tree in the desired direction of fall. After a

felling cut is made on the opposite side

of tree, the tree will tend to fall in the

direction of the notch.

NOTE: If tree has large buttress roots,

remove them before making the notch. If

using saw to remove buttress roots,

keep saw chain from contacting ground

to prevent dulling of the chain.

NOTCH CUT AND FELL ING TREE

S Make notch cut by cutting the top of

the notch first. Cut through

1/3 of the

diameter of the tree. Next complete

the notch b y cutting the bottom. See il-

lustration. Once notch is cut, remove

the wedge o f wood from the tree.

Notch

First cut

Second cut

Felling cut here

Hinge

S After removing the wood from the

notch, make the felling cut on the op-

posite side o f the notch. This is done

by making a cut about two inches

higher than the center o f the notch.

This will leave enough uncut wood be-

tween the felling cut and the notch to

form a hinge. This hinge will help pre-

vent the tree from falling in the wrong

direction.

Opening

of felling

cut

Closing of

notch

Hinge holds tree on stump and helps

control fall

NOTE: Before felling cut is complete, use

wedges to open the cut if necessary to

control the directi on of fall . To avoid kick-

back and chain damage, use wood or

plasti c wedges, but never steel or iron

wedges.

S Be alert to signs that the tree is ready

to fall: cracking sounds, widening of

the felling cut, or movement in the up-

per branches.

S As tree starts to fall, s top saw, put it

down, and get away quickly on y our

planned retreat path.

S

DO NOT use your saw to cut down a par-

tial l y fallen tree. Be extremely cautious

wit h part i all y fallen trees that may be

poorly supported. When a tree doesn’t

fall completely , set saw aside and pull

down tree with a cable winch, block and

tackle, or tractor.

CUTTING A FALLEN TREE

(BUCKING)

Bucking is the term used for cutting a

fallen tree to the desired log size.

WARNING: Do not stand on the

log being cut. Any portion can roll caus-

ing loss of footing and control. Do not

stand downhill of the log being cut.

IMPORTANT POINT S

S Cut only one log at a time.

S Cut shattered wood very carefully;

sharp pieces of wood could be flung

toward operator.

S Use a sawhorse to cutsmall logs.Nev-

er allow another person to hold the log

while cutting and never hold the log

with your leg or foot.

S Do not cut in an area where logs, lim bs,

and roots are tangled. Drag logs into a

clear area before cutting them by pulling

out exposed and cleared logs first .

BUCKING TECHNIQUES

WARNING: If saw becomes

pinched or hung in a log, don’t tr y to force it

out . You can lose control of the saw, re-

sulti ng in injury and/or damage to the saw .

St op the saw; drive a wedge of plast ic or

wood into cut until t he saw can be re-

moved easily. Restart saw and carefull y

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