Handleiding McCulloch 441 (pagina 10 van 16) (Duits, Engels, Frans, Spaans)

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CUTTING METHODS

IMPORTANT POINTS

S Check chain tension before first use and af-

ter 1 minute of operation. See CHAIN TEN-

SION in the ASSEMBLY section.

S Cut wood only. Do not cut metal, plastics,

masonry , no n-wood b uildin g mat erials, etc.

S Stop the saw if the chain strikes a foreign ob-

ject. Inspect the saw and repair parts as nec-

essary.

S Keep the chain outof dirtand sand. Even a

small amount of dirt will quickly dull a chain

and increase the possibility of kickback.

S Practice cutting a few small logs using the

following techniques to get the “feel” of us-

ing your saw before you begin a major

sawing op eration.

S Squeeze the throttle trigger and allow the

engine to reach full speed before cutting.

S Begin cutting w i th the saw frame

against the log.

S Keep the engine at full speed the entire

time you a re cutting.

S Allow thechain tocut for you. Exert only

light downward pressure.

S Release 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.

S Toavoid losing control whencut is com-

plete, d onot putpressure onsaw at end

of cut.

S Stop the engine before setting the saw down.

TREE FELLING TECHNIQUES

WARNING:Do notcut near buildings

or electrical wires if you do not know the di-

rection of tree fall, at night since you will not

be able to see well, or during bad weather

such as rain, snow, or strong winds. as fall is

unpredictable.

Carefully plan your sawing operation in ad-

vance. You need a clear area all around the

tree so you can have secure footing. Check

for broken or dead branches which can fall

on you causing serious injury.

Natural conditions that can cause a tree to

fall in a particular direction include:

S The 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.

S Weight 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.

Make sure there is enough room for the tree to

fall. Maintain a distance of

2-1/2 tree lengths

from the nearest person or other objects. En-

gine noise can drown out a warning call.

Remove dirt, stones, loose bark, nails, sta-

ples, and wire from the tree where cuts are to

be made.

Direction of Fall

45_

Plan a clear retreat path

FELLING LARGE TREES

(15cmindiameterorlarger)

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.

NOTCH CUT AND FELLING THE

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 by cut-

ting the bottom of the notch. See illustra-

tion. Once the notch is cut remove the

notch of wood from the tree.

Notch

First cut

Second cut

Final cut here. 5 cm above

center of notch.

5cm

S After 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 h inge will help prevent 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 when necessary to

control thedirection offall. Toavoid kickback

or chain damage, use wood or plastic

wedges, but never steel or iron wedges.

S Bealerttosignsthatthetreeisreadytofall:

cracking sounds, widening of the felling cut,

or movement in the upper branches.

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