YATO YT-84877, Manual

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22
EN
O R I G I N A L I N S T R U C T I O N S
Working with the power saw
Persons who intend to work with a chainsaw for the fi rst time should seek advice on work and safety from a quali fi ed chainsaw op-
erator before starting work. The fi rst works with the chainsaw should consist of cutting the prepared logs placed on the saw-horse.
During work, observe the basic occupational safety principles. Consider also the possibility of kickback in the operator’s direction.
The chainsaw may kickback in the operator’s direction when the cutting chain encounters resistance.
To reduce this risk:
Pay attention to the placement of the guide bar top when cutting. It is forbidden to cut with the upper quarter of the guide bar top
(XVIII).
Cut only with the chain which moves along the bottom part of the guide bar (XIX). The lower spike should be used as the axis of
rotation of the saw when cutting.
Only apply the started chainsaw to the wood to be cut. Do not start the chainsaw after having applied it to the wood being pro-
cessed.
When working, do not lift the chainsaw to arm height or higher (XX).
Do not stand in the cutting plane. This will reduce the risk of injury in case of kickback (XXI).
During work, always hold the power saw with both hands.
Make sure that the chain is always sharp and appropriately tensioned.
TIPS FOR WORKING WITH THE CHAINSAW
Take a comfortable position and ensure full freedom of movement when cutting.
When cutting branches and boughs, do not cut them at the trunk, but at a distance of about 15 cm from the trunk. Make two cuts
to a depth of 1/3 of the branch diameter, approximately 8 cm apart. One cut from below, one from above. Then cut the branch just
at the trunk to a depth equal to 1/3 of the branch diameter. Finish the process by cutting the branch at the trunk from above. Do
not cut the branches by cutting from the bottom (XXII).
When cutting a tree, prepare the felling site in advance as described above. Additionally, prepare a safe substrate for tree felling.
When a tree falls, stand at a safe distance to the plane of the tree fall, on the side. When choosing the path of wood fall, take
into account factors such as terrain topography, tree centre of gravity, tree crown pattern, and wind direction. To properly prepare
the tree for felling, make a cut in the trunk to a depth of 1/3 of the trunk diameter on the side to which the tree is to fall, and then
cut another at an angle of 45 degrees to the fi rst so as to cut a “wedge” in the trunk. On the other side of the trunk, start cutting
perpendicular to the trunk axis, slightly higher (approx. 4 cm) than the cut “wedge” base. Do not cut the trunk. Leave a section
of approximately 1/10 of the trunk diameter. Then insert the wedge for splitting the tree into the cut on the opposite side to the
planned side of the tree fall (XXIII).
If the tree already falls during cutting, pull the chainsaw out of the trunk and move away along the prepared escape route to a
safe distance.
If the power saw gets stuck while cutting, never leave it in this position with the motor running. Turn o ff the power saw motor,
unplug the power saw from the power supply, and use wedges to extract the power saw from the trunk.
When cutting a tree that has already been felled into pieces, follow the rules indicated below. Place the wood on the saw-horse or
a stand so the cut piece can freely fall o ff to the ground without causing the chainsaw to jam. If the chainsaw is jammed, proceed
as described above. Do not touch the ground with the chainsaw or allow it to be contaminated with soil.
When working on a slope, stay above the cut wood.
Exercise particular caution when cutting a tensioned tree and entrust this activity to a quali fi ed lumberjack, if possible. When
cutting tensioned wood and supported on both ends, cut it from above to a depth of 1/3 of the diameter, and then fi nish the cut
from the bottom.
If the wood is supported only at one end, cut the wood from the bottom to a depth equal to 1/3 of the diameter, and then fi nish the
process by cutting from the top (XXIII). This will reduce the risk of the power saw jamming during cutting.
Always cut the branches by cutting the wood from the top. Do not cut the branches by cutting the wood from below.
When cutting larger branches, fi rst cut o ff all smaller branchings from the branch, and then cut o ff the larger one.
Longer branches should be cut bye gradually shortening them. Do not cut long branches at their entire length. It is easier to predict
the path of the fall of a shorter branch.
Cut branches from the bottom of the tree upwards.
Always use an auxiliary belt when working with the extension. The operator should move the belt diagonally across the chest
so that the attachment point for extension is on the right side of the body at hip height. The length of the belt can be adjusted by
means of the buckles.
PRODUCT MAINTENANCE AND STORAGE
Warning! Before starting any activities described below, disconnect the power saw from the power supply. Disconnect the
mains-powered chainsaws from the socket. In the case of the battery-powered chainsaws, disconnect their battery.
After each use, inspect the condition of the power saw with particular attention to the patency of ventilation openings.
Check the placement of all of the power saw’s components. Tighten all loose screw connections, if any. Check the tension and
condition of the chain. If any damage is observed, replace the chain with a new one. It is forbidden to use the power saw with a
damaged chain!