Husqvarna 555FX Operator's Manual page 28

• Use a socket wrench with a shaft that is sufficiently
long to let you keep your hand behind the cutting
attachment guard. The arrow in the illustration shows
the area where you can safely operate the socket
wrench.
• To attach, tighten the locknut in the opposite
direction to how the cutting attachment rotates.
• To remove the locknut, turn it in the same direction
as how the cutting attachment rotates.
• Keep count when you remove and attach the
locknut. Replace the locknut after approximately 10
times.
Note:
Make sure that you can not turn the locknut by
hand. Replace the locknut if the nylon lining does not
have a resistance of a minimum of 1.5 Nm.
To sharpen the grass knife and grass
blade
WARNING:
protective gloves.
• To sharpen the grass knife or grass blade correctly,
refer to the instructions that come with the cutting
attachment.
• Sharpen all edges equally to keep the balance.
• Use a single-cut flat file.
28
Stop the engine. Use
WARNING:
that is damaged. Do not try to make a bent
or twisted blade straight and use it again.
To sharpen the saw blade
WARNING:
protective gloves.
• To sharpen the blade correctly, refer to the
instructions that come with the blade.
• Make sure that the product and blade has sufficient
support when you sharpen it.
• Use a 5.5 mm round file with a file holder.
• Hold the file at an angle of 15°.
• Sharpen one tooth of the saw blade to the right and
the next tooth to the left, see the illustration.
Note:
Sharpen the edges of the teeth with a flat
file if the blade is heavily worn. Continue to sharpen
with a round file.
Always discard a blade
Stop the engine. Use
15˚
1346 - 004 - 03.06.2021