Manual McCulloch CS 410 Elite (page 24 of 172) (English, Turkish)

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WORKING TECHNIQUES

24 – English

Set the spike bumper (if one is ﬁtted) just behind the felling

hinge. Use full throttle and advance the chain/bar slowly

into the tree. Make sure the tree does not start to move in

the opposite direction to your intended felling direction.

Drive a wedge or breaking bar into the cut as soon as it is

deep enough. (40)

Finish the felling cut parallel with the directional cut line so

that the distance between them is at least 1/10 of the

trunk diameter. The uncut section of the trunk is called the

felling hinge.

The felling hinge controls the direction that the tree falls in.

(41)

All control over the felling direction is lost if the felling

hinge is too narrow or non-existent, or if the directional

cuts and felling cut are badly placed.

When the felling cut and directional cut are complete the

tree should start to fall by itself or with the aid of a felling

wedge or breaking bar.

We recommend that you use a bar that is longer than the

diameter of the tree, so that you can make the felling cut

and directional cuts with single cutting strokes. See

instructions under the heading Technical data section to

ﬁnd out which lengths of bar are recommended for your

saw.

There are methods for felling trees with a diameter larger

than the bar length. However these methods involve a

much greater risk that the kickback zone of the bar will

come into contact with the tree.

Freeing a tree that has fallen badly

Freeing a ”trapped tree”

It is very dangerous to remove a trapped tree and there is

high accident risk.

Never try to fell the tree that is trapped.

Never work in the risk zone of the hanging trapped tree.

The safest method is to use a winch.

• Tractor-mounted

• Portable

Cutting trees and branches that are in tension

Preparations: Work out which side is in tension and where

the point of maximum tension is (i.e. where it would break

if it was bent even more).

Decide which is the safest way to release the tension and

whether you are able to do it safely. In complicated

situations the only safe method is to put aside your chain

saw and use a winch.

General advice:

Position yourself so that you will be clear of the tree or

branch when the tension is released.

Make one or more cuts at or near the point of maximum

tension. Make as many cuts of sufﬁcient depth as

necessary to reduce the tension and make the tree or

branch break at the point of maximum tension.

Never cut straight through a tree or branch that is in

tension!

If you must cut across tree/limb, make two to three cuts,

one inch apart, one to two inches deep.

Continue to cut deeper until tree/limb bends and tension

is released.

Cut tree/limb from outside the bend, after tension has

been released.

How to avoid kickback

What is kickback?

The word kickback is used to describe the sudden

reaction that causes the chain saw and bar to jump off an

object when the upper quadrant of the tip of the bar,

known as the kickback zone, touches an object. (45)

Kickback always occurs in the cutting plane of the bar.

Normally the chain saw and bar are thrown backwards

and upwards towards the user. However, the chain saw

may move in a different direction depending on the way it

was being used when the kickback zone of the bar

touched the object.

Kickback only occurs if the kickback zone of the bar

touches an object.

Limbing

Make sure that you can stand and move about safely.

Work on the left side of the trunk. Work as close as

possible to the chain saw for maximum control. If possible,

let the weight of the chain saw rest on the trunk.

Keep the trunk between you and the chain saw as you

move along the trunk.

Cutting the trunk into logs

See instructions under the heading Basic cutting

technique.

WARNING! Kickback can happen very

suddenly and violently; kicking the chain

saw, bar and chain back at the user. If

this happens when the chain is moving it

can cause very serious, even fatal

injuries. It is vital you understand what

causes kickback and that you can avoid

it by taking care and using the right

working technique.

WARNING! A majority of kickback

accidents occur during limbing. Do not

use the kickback zone of the guide bar.

Be extremely cautious and avoid

contacting the log, other limbs or objects

with the nose of the guide bar. Be

extremely cautious of limbs under

tension. They can spring back toward

you and cause loss of control resulting

in injury.

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McCulloch CS 410 Elite Manual

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