YATO YT-84893 Manual Del Usuario página 23

EN
The chainsaw must be equipped with a suitable loop to attach it to the user's carrying belt:
- The loop should be attached to the suspension mechanism on the back of the chainsaw;
- suitable snap hooks must be available for indirect (via the loop) and direct (via the chainsaw suspension mechanism) attachment
of the chainsaw to the user's belt.
- Ensure that the chainsaw is securely fixed when it is raised to the user;
- make sure that the chainsaw is attached to the carrying strap before it is released from the lifting rope.
Example of attaching an operator to a tree and a tree care chainsaw to a user's carrying strap (XIX). Attach the carrying strap with
a suitable snap hook to the suspension mechanism of the chainsaw. The ability to attach the chainsaw directly to the carrying strap
reduces the risk of damage to the equipment when moving through the tree. Always switch off the chainsaw when it is attached
directly to the carrying strap. Attach the chainsaw only to the recommended attachments on the carrying strap. They can be in the
middle (front or back) or on the sides. Where possible, the chainsaw should be secured at the centre point of the rear carrying
strap to keep it away from climbing ropes and to support the weight centrally located under the user's spine (XX).
If the chainsaw is moved from one suspension mechanism to another, the user should make sure that the chainsaw is secured in
its new position before unhooking from the first mechanism.
Using the chainsaw on a tree
An analysis of accidents involving this chainsaw during tree care work indicates that the main causes are incorrect one-handed
operation of the saw.
In most cases, the user does not adopt a safe working position to hold the chainsaw by both handles leading to an increased risk
of injury as a result:
– lack of a firm grip when the chainsaw moves back towards the operator;
– lack of control of the chainsaw to facilitate contact with the climbing ropes and the user's body (especially the left hand and arm)
– loss of control due to an unsafe working position and thus contact with the chainsaw (unexpected movements when working
with the chainsaw).
Safe working position for two-handed operation
– Never cut branches above the shoulders or hands (XXI).
– Never cut with arms fully extended (XXI).
– Never cut branches that are out of reach.
In order to be able to hold the chainsaw with both hands, the user should always try to adopt a safe working position (XXII) in
which the chainsaw can be guided as follows: at hip height when cutting horizontal parts or at abdominal height when sawing
vertical parts.
If the user is working close to a vertical trunk with low lateral forces relative to the working position, a secure foot rest may be
sufficient to ensure a safe working position. As soon as the user moves away from the trunk, additional measures should be taken
to reduce or counteract the increasing lateral forces.
For example, by rerouting the main rope through an additional suspension mechanism (XXIII) or using an adjustable guide loop
from the harness to the additional suspension mechanism (XXIV). For good support in the working position, the endless loop can
serve temporarily as a support stirrup.
Starting a chainsaw on a tree
When starting a chainsaw on a tree, the user must: move the kickback brake to the rear position before starting and hold the chain-
saw on the left or right side of the body when starting. Hold the chainsaw on the left side with the left hand on the front handle and
the guide bar facing away from the body while holding the starter rope in the right hand, or hold the chainsaw on the right side with
the right hand on one of the two handles and the guide bar facing away from the body while holding the starter rope in the left hand.
The rebound brake should always be in the forward position before lowering the chainsaw on the support cable.
The user should always ensure that the chainsaw has sufficient fuel before carrying out difficult sawing work.
One-handed operation of the chainsaw (XXV)
Users should not hold a tree care chainsaw with one hand in unstable working positions or instead of a hand chainsaw to remove
the tip of small diameter branches. The chainsaw should only be used for tree care with one hand if: it is not possible for the
user to assume a working position that allows operation with both hands, it is necessary to use one hand to secure the working
position, the chain is used in a fully extended position, at right angles to the user's body and not in line with the user. Users should
never: cut with the area of the guide causing a bounce towards the operator, hold on to the branch they are sawing, try to catch
falling objects.
Releasing a blocked chainsaw
If the chainsaw locks up during cutting, the user should: switch off the saw, securely fasten it to the tree (i.e. to the trunk) or to
a separate operating line, pull the chainsaw out of the cut while lifting the branch to a suitable height, if necessary use a hand
chainsaw or a second chainsaw to free the jammed chainsaw by cutting off the branch at least 30 cm from the jammed chain.
0Regardless of whether a hand chainsaw or chainsaw is used to free a jammed chainsaw, cuts to free the chainsaw must always
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