Safety Features - Makita UC3520A Instruction Manual

9. Clean the area to be cut of foreign objects such as
sand, stones, nails, wire, etc. Foreign objects
damage the bar and chain, and can lead to
dangerous kickback.
10. Take particular care when cutting in the vicinity of
wire fences. Do nut cut into the fence, as the saw
may kick back.
11. Do not cut into the ground.
12. Cut pieces of wood singly, not in bunches or
stacks.
13. Avoid using the saw to cut thin branches and roots,
as these can become entangled in the chain saw.
Loss of balance presents a hazard.
14. Use a secure support (trestle) when cutting sawn
timber.
15. Do not use the chain saw to prise off or brush
away pieces of wood and other objects.
16. Guide the chain saw such that no part of your
body is within the extended path of the saw chain
(see figure).
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17. When moving around between sawing operations,
apply the chain brake in order to prevent the chain
from being operated unintentionally. Hold the
chain saw by the front handle when carrying it,
and do not keep your finger on the switch.
Withdraw the mains plug when taking breaks or
leaving the chain saw unattended. Leave the
chain saw where it cannot present a hazard.
18. Withdraw the mains plug when taking breaks or
leaving the chain saw unattended. Leave the
chain saw where it cannot present a hazard.
Kickback
1. Hazardous kickback may arise during work with
the chain saw. Kickback arises when the tip of the
bar (in particular the upper quarter) comes into
contact with wood or another solid object. This
causes the chainsaw to be deflected in the
direction of the operator.
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2. In order to avoid kickback, observe the following:
Never begin the cut with the tip of the bar.
•
Never use the tip of the bar for cutting. Take
•
particular care when resuming cuts which
have already been started.
Start the cut with the chain running.
•
Always sharpen the chain correctly. In
•
particular, set the depth gauge to the correct
height (refer to "Sharpening the chain " for
details).
Never saw through several branches at a
•
time.
When limbing, take care to prevent the bar
•
from coming into contact with other branches.
When bucking, keep clear of adjacent trunks.
•
Always observe the bar tip.
Use a trestle.
•

Safety features

1. Always check that that the safety features are in
working order before starting work. Do not use the
chain saw if the safety features are not working
properly.
− Chain brake:
The chain saw is fitted with a chain brake which
brings the saw chain to a standstill within a fraction
of a second. It is activated when the hand guard is
pushed forwards. The saw chain then stops within
0.15 s, and the power supply to the motor is
interrupted.
2
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− Run-down brake:
The chain saw is equipped with an run down brake
which brings the saw chain to an immediate stop
when the ON/OFF switch is released. This
prevents the saw chain from running on when
switched off, and thus presenting a hazard.
9
1. Chain brake
applied
1
2. Chain brake
released