Manual Greenworks 20037 (page 22 of 256) (All languages)

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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

utility company should be notified immediately.

The chainsaw 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

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

expected line of fall as illustrated in Fig. 9.

Before felling is started, consider the natural lean of

the tree, the location of larger branches and the wind

direction to judge which may the tree will fall.

Remove dirt, stones, loose bark, nails, stapes and

wire from the tree.

■ Notching undercut (A notch cut in a tree to direct the

fall) (Fig.10)

Make the notch 1/3 the diameter of the tree,

perpendicular to the direction of falls. Make the lower

horizontal notching cut first, this will help to avoid

pinching of either the saw chain or the guide bar

when the second notch is being made.

■ Felling back cut (the final cut in a tree felling

operation, made on the opposite side of the tree from

the notching undercut) (Fig.10)

Make the felling back cut at least 50mm higher than

the horizontal notching cut. K

eep the felling back

cut parallel to the horizontal notching cut. Make the

felling back cut so enough wood is left to act as a

hinge. The hinge wood keeps the tree from twisting

and falling in he wrong direction. Do not cut through

the hinge. As the felling cut gets close to the hinge,

the tree should begin to fall. If there is any chance

that the tree may not fall in the desired direction

or it may rock back and bind the saw chain, stop

cutting before the felling back cut is complete and use

wedges of wood, plastic or aluminium to open the cut

and drop the tree along the desired line off all. When

the tree begins to fall remove the chainsaw from the

cut, stop the motor, put the chainsaw down, and then

use the retreat path planned. Be alert for overhead

limbs falling and watch your footing.

■ Limbing a tree (Fig.11)

Limbing is removing the branches from a fallen tree.

When limbing, leave larger lower limbs to support the

log off the ground. Remove the small limbs in one

cut. Branches under tension should be cut from the

bottom up, to avoid binging the chainsaw.

■ Bucking a log (Fig.12-15) Bucking is cutting a log

into lengths. It is important to make sure your footing

is firm and your weight is evenly distributed on both

feet. When possible the log should be raised and

supported by the use of limbs, logs or chocks.

Follow the simple direction for easy cutting:

a) When the log is supported along the entire length, it

is cut from the top (overbuck). (Fig.12)

b) When the log is supported on one end, cut 1/3 of the

diameter from the underside (underbuck). Then make

the finished cut by overbucking to meeting the first

cut. (Fig.13)

c) When the log is supported on both ends, cut 1/3 of

that diameter from the top(overbuck). Then make the

finished cut by underbucking the lower 2/3 to meet

the first cut. (Fig.14)

d) When bucking on a slope always stand on the uphill

side of the log. When cutting through, to maintain

complete control, release the cutting pressure near

the end of the cut without relaxing your grip on the

chainsaw handles. (Fig.15).

Do not let the chain contact the ground. After completing

he cut, wait for the saw chain to stop before you move

he chainsaw. Always stop the motor before moving from

tree to tree.

MAINTENANCE

(Fig. 16-21)

Chain Sharpening

When the chain penetrates into wood with difficultly, it

needs sharpening as follows:

■ Put the chain under tension.

■ Fasten the bar in a vice so that the chain can slide.

■ Fasten the file to the file holder and place it on cutter

at a 35° angle.

■ File with forward strokes only until all the worn out

part of the cutting edge is taken away.

■ Count the number of strokes given to the cutter taken

as a reference basis and file away for the same

number of strokes on all other cutters.

■ If after sharpening a few times, the depth gauge

protrudes from the template, you must reset its level

use a flat file.

■ Finally, round off the depth gauge.

NOTE: We advise you to have the deep or important

sharpening carried out by a service agent who is

equipped with electric sharpener.

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Greenworks 20037 Manual

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