Husqvarna K 770 Dry Cut Operator's Manual page 113

5. Replace the cutting blade and the blade guard if they
are damaged. Replace the blade guard extender, the
dust shield or their springs if they are defected and
not returning instantly when pushed in.
Vibration damping system
WARNING: Overexposure to vibration can
lead to circulatory damage or nerve damage
in people who have impaired circulation.
Contact your doctor if you experience
symptoms of overexposure to vibration.
Such symptoms include numbness, loss of
feeling, tingling, pricking, pain, loss of
strength, changes in skin color or condition.
These symptoms normally appear in the
fingers, hands or wrists. These symptoms
may be increased in cold temperatures.
Your product is equipped with a vibration damping
system that is designed to minimize vibration and make
operation easier. The product's vibration damping
system reduces the transfer of vibration between the
engine unit/cutting equipment and the product's handle
unit.
Cutting granite or hard concrete creates more vibration
than cutting soft concrete. Cutting with cutting
equipment that is blunt or faulty (wrong type or badly
sharpened) will increase the vibration level.
To do a check of the vibration damping system
WARNING: Make sure that the engine is
switched off and that the stop switch is in
STOP position.
1. Make sure that there are no cracks or deformation
on the vibration damping units. Replace the vibration
damping units if they are damaged.
2. Make sure that the vibration damping units are
correctly attached to the engine unit and handle unit.
Muffler
The muffler keeps the noise levels to a minimum and
sends the exhaust fumes away from the operator.
Do not use the product if the muffler is missing or
defective. A defective muffler increases the noise level
and the risk of fire.
861 - 004 - 27.02.2019
WARNING: The muffler gets very hot during
and after use. This also applies during idling.
Be aware of the fire hazard, especially when
working near flammable substances and/or
vapours.
To examine the muffler
1. Make sure that the muffler is not damaged.
2. Make sure that the muffler is correctly attached.
Kickback
WARNING: Kickbacks are sudden and can
be very violent. The power cutter can be
thrown up and back towards the user in a
rotating motion causing serious or even fatal
injury. It is vital to understand what causes
kickback and how to avoid it before using
the product.
Kickback is the sudden upward motion that can occur if
the blade is pinched or stalled in the kickback zone.
Most kickbacks are small and pose little danger.
However a kickback can also be very violent and throw
the power cutter up and back towards the user in a
rotating motion causing serious or even fatal injury.
Reactive force
A reactive force is always present when cutting. The
force pulls the product in the opposite direction to the
blade rotation. Most of the time this force is insignificant.
If the blade is pinched or stalled the reactive force will be
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