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Kickback - Husqvarna 268K, 272K Operator's Manual

Husqvarna brush cutter operator's manual
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!
Over exposure to vibrations can result in
blood-vessel or nerve injury to persons
suffering with blood circulation problems.
Seek medical attention if you experience
physical symptoms that can be related to over
exposure to vibrations. Examples of such
symptoms are numbness, lack of feeling,
"tickling", "pricking", pain lack of or a
reduction in normal strength, changes in the
colour of the skin or its surfaces. These
symptoms normally appear in the fingers,
hands or wrists.
Cutting technique
The technique described below is of a general character. Check
information for each disc regarding individual cutting characte-
ristics. (For example, a diamond disc requires less feeding
pressure than a abrasive disc).
1. Support the work piece in
such away that you can
predict what will happen
and so it will not pinch.
2. Always cut at full throttle.
3. Start cutting gently, do
not force or squeeze the
disc in.
4. Use a high disc speed.
5. Move the disc slowly
backwards and forwards.
6. Use a small part of the
disc's cutting edge.
7. Only use the disc's
cutting edge when
cutting.
8. Cut with the disc fully
vertical – at right angles
to the work piece.
!
WARNING!
Under all circumstances avoid cutting using
the side of the disc; it will almost certainly be
damaged, break and can cause immense
damage. Only use the cutting section.
!
WARNING!
Do not lean the disc to the side, this can
cause the disc to jam or break with personal
injury as a consequence.
8
– English
SAFETY INSTRUCTIONS
Water cooling
!
WARNING! Water cooling, which is only used
for petrol-driven power cutters and when
cutting concrete, cools the cutting disc and
increases its service life as well as reduce
dust formation (see the section " Abrasive
discs "). Among the disadvantages are
difficulties at very low temperatures and the
risk of damaging the floor and other sections
of the building.
Sharpening discs
Discs can become dull when the wrong feeding pressure is
used or when cutting some materials such as heavily reinforced
concrete. To force a dull disc results in overheating and finally
the loss of segments (part of the disc).
Sharpen against a soft material such as sandstone, silica or
haydite brick.
Disc vibration
The disc can become out of shape (not round) and vibrate if a
too high feeding pressure is used or if the disc is pressed into
the work piece.
A lower feeding pressure ought to stop the vibration. Otherwise
replace the cutting disc.

Kickback

Kickback can occur very suddenly and with great force. If the
following directives are not followed, it can result in serious or
even fatal injury.
If the sector of the disc illustrated below is used for cutting the
disc can start to climbing and kickback the power cutter
upwards and backwards towards the user with immense force.
How to avoid kickback
1. Never cut with the
segment illustrated in the
diagram.
2. Keep a good balance and
a firm foothold.
3. Use both hands and take
a firm grip with the thumb
and fingers around the
handle.
4. Keep the work piece at a
comfortable distance.
5. Use the cutter at full
throttle.
6. Take care when inserting
the disc in an existing cut.
7. Never cut above shoulder
height.
8. Be alert to movement of
the work piece or anything
else that can occur, which
could cause the cut to
close and pinch the disc.

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