Husqvarna 331R Manual De Usuario página 9

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A locknut is used to attach some types of cutting
attachments. The locknut has a left thread.
To attach, tighten the locknut in the opposite
direction to the direction of turning of the cutting
attachment.
To remove the locknut, loosen the locknut in the
same direction as the cutting attachment rotates.
To loosen and tighten the locknut, use a socket
wrench with a long shaft. The arrow in the picture
shows the area where you can operate the socket
wrench. (Fig. 22)
WARNING:
tighten the locknut, there is a risk of
injury from the blade. You must always
make sure that the blade guard prevents
injury to your hand when you do this.
Note:
Make sure that you can not turn the locknut by
hand. Replace the nut if the nylon lining does not have
a resistance of a minimum of 1.5 Nm. The locknut must
be replaced after it has been put on approximately 10
times.
Cutting equipment
Choose and maintain the cutting equipment to:
Obtain maximum cutting performance.
Increase life span of the cutting equipment.
Follow the checking, maintenance and service
instructions for the muffler.
Always use the recommended guard for the cutting
equipment. See Technical data.
WARNING:
attachments with the guards we
recommend! See the chapter on Technical
data. Refer to the instructions for the cutting
attachment to check the correct way to load
the trimmer line and the correct trimmer line
diameter.
WARNING:
may increase the risk of accidents.
WARNING:
before doing any work on the cutting
attachment. This continues to rotate even
after the throttle has been released. Ensure
that the cutting attachment has stopped
completely and disconnect the spark plug
cap before you start to work on it.
Cutting equipment
Use the blades and grass knives to cut coarse grass.
1544 - 005 - 03.04.2023
When you loosen and
Only use cutting
A faulty cutting attachment
Always stop the engine
(Fig. 23)
Use the trimmer head to trim grass.
(Fig. 24)
An incorrectly sharpened or damaged blade
increases the risk of accidents. Keep the teeth of the
blade correctly sharpened. Follow the instructions
and use the recommended file gauge.
Check the cutting attachment for damage or cracks.
Replace a damaged cutting attachment.
Only use cutting attachments with recommended
Accessories on page 19 .
guards. Refer to
Trimmer head
WARNING:
trimmer line is wound tightly and evenly
around the drum to prevent harmful
vibration.
(Fig. 25)
Only use recommended trimmer heads and trimmer
lines.
Only use recommended cutting attachments.
Smaller machines requires small trimmer heads and
vice versa.
The length of the trimmer line is important. A longer
trimmer line requires greater engine power than a
shorter trimmer line of the same diameter.
Make sure that the cutter on the trimmer guard
is intact. This cuts the trimmer line to the correct
length.
Soak the trimmer line in water for a couple of days
before use to increase the life length.
Grass blades and grass cutters
Use the product with an approved grass blade. Do
not use a grass blade without proper installation of
all required parts. Make sure that the installation is
done correctly and that the proper parts are used.
Improper installation may cause the blade to fly off
and seriously injure the operator or the bystanders.
Wear protective gloves when you handle or do
maintenance on the blade.
Use head protection when you operate a product
with a grass blade.
Grass blades and grass cutters are used to cut
rough grass.
A grass blade can cause injury while it continues
to spin after the engine is stopped or the throttle
trigger is released. Make sure that the grass
blade has completely stopped rotating before any
maintenance.
Stop the engine before you do work on the cutting
attachment. Make sure the cutting attachment fully
stops. Disconnect the lead from the spark plug.
Only use an approved cutting attachment or a
correctly sharpened blade.
Keep the teeth of the blade correctly sharpened.
Always make sure the
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