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RCS2040
Инструкция по эксплуатации Страница: 22

Ryobi RCS2040 [22/248] English original instructions

Deutsch (Übersetzung der originalen Anleitungen)

English (Original instructions)

utility 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

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. Keep 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 the 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 chain saw from the

cut, stop the motor, put the chain saw 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 chain saw.

 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

chain saw handles. (Fig.15).

Do not let the chain contact the ground. After completing

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

the chain saw. 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.

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English Original instructions utility company should be notified immediately 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 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 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 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 chain saw handles Fig 15 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 Keep 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 the 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 chain saw from the cut stop the motor put the chain saw down and then use the retreat path planned Be alert for overhead limbs falling and watch your footing Do not let the chain contact the ground After completing the cut wait for the saw chain to stop before you move the chain saw 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 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 chain saw NOTE We advise you to have the deep or important 20

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