Manual McCulloch 1650-16 (page 12 of 15) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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ENGLISH – 9

- At the end of each cutting operation the user will

notice a considerable change in the strength

necessary for controlling the machine. Great care

must be taken not to loose control .

Below is a description of two different types of cutting

operation:

Cutting action by pulling the chain (from top to

bottom) (fig.2) can lead to dangerous sudden

movement of the machine towards the trunk with

consequential loss of control. Where possible, use the

spiked bumper during cutting operations.

Cutting action pushing the chain (from bottom to top)

(fig.3) will lead to the danger of a sudden movement

of the machine in the direction of the user, with the

risk of hitting the user, or an impact of the “kickback

danger zone” on the trunk resulting in strong

kickback; extreme care must be taken when cutting in

this manner.

The safest method for using the machine, is to block

the log on a sawhorse, cutting from top to bottom, on

the portion outside the sawhorse. (fig.4)

Spiked bumper use.

Where possible, use the spiked bumper to ensure

safer cutting action: plant it in the bark or surface of

the trunk in order to maintain more control over the

machine.

Below are descriptions of typical cutting procedure to

be adopted for specific situations. However, these

should be assessed each time to calculate whether

the method is most suitable or not, in order to use a

method with the least possible risk.

Trunk on the ground. (Risk of touching the ground

with the chain once the bar has passed trough the

trunk). (fig.5)

Cut from top to bottom through the whole trunk.

Towards the end of the cut, proceed very carefully to

prevent the chain from hitting the ground. If it is

possible, cut 2/3 of the trunk, roll it over, and cut the

remaining third from top to bottom to limit the risk of

the chain touching the ground.

Trunk supported at one end only (Risk of trunk

breaking during cutting action). (fig.6)

Begin the cut from underneath for about 1/3 of the

diameter, and then finish the cutting action from the

top to meet the undercut.

Trunk supported at both ends. (Risk of pinching the

chain). (fig.7)

Begin the cut from above for about 1/3 of the

diameter, and then continue from underneath to meet

the overcut.

Tree felling.

ATTENTION! : Never attempt to fell a tree if you do

not have the necessary experience, and in any case

never fell trees that have trunks with a diameter larger

than the length of the bar ! This operation is reserved

for expert machine users with adequate equipment.

When felling a tree, the aim is to have the tree fall in

the most convenient position for the following limbing

and bucking operations. (Avoid trees falling on top of

other trees: Felling trees that are entangled with other

trees is a very dangerous operation).

First of all decide which is the best direction for the

tree to fall by evaluating the following: objects or other

plants around the tree, the inclination, the curve, wind

direction, and greatest branch concentration. Take

into account dead or broken branches that may break

off during felling creating a further danger risk.

ATTENTION! During tree felling operations in critical

conditions, always remove ear protection immediately

after cutting operations to be able to listen for unusual

noises and any warning signals.

Preliminary cutting operations and identifying the

retreat path.

Eliminate any branches that interfere with the job

(fig.8), starting from top to bottom, and then, always

keeping the trunk between the user and the machine

eliminate the more difficult branches afterwards, piece

by piece. Eliminate all plants that interfere with work

operations and control the area for possible obstacles

(rocks, roots, ditches,etc.) when planning the retreat

path (to follow during tree fall); Refer to the illustration

(fig.9) for the directions to be maintained (A. predicted

tree fall direction. B. Retreat path. C. Danger zone).

FELLING CUTS (fig.10)

In order to ensure that the user has complete control

over the tree fall, the cutting instructions are as

follows:

The cut that controls the fall direction of the tree is to

be executed first: First of all cut the UPPER PART of

the directional notch on the side the tree must fall.

Remain on the right hand side of the tree and cut

using the chain pull method; then cut the LOWER

PART that must meet the end of the upper part. The

depth of the directional notch must be ¼ of the trunk

diameter, with an angle of at least 45° between upper

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McCulloch 1650-16 Manual

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