Shindaiwa C3410 Operator's Manual page 30

Trimming operation
Turn off the engine immediately if the product suddenly starts
to vibrate abnormally. Sudden vibration may be caused by a
problem with a component such as the flywheel, clutch, or
trimmer blade, or by a loose screw or other such factor. Do not
use the product until you have identified the cause of the prob-
lem and the repair has been completed.
The trimmer blade could fly off unless tightened securely. En-
sure that it is fitted securely in place.
Replace the shield if it is damaged or cracked.
If you work with the angle transmission in contact with the sur-
face of the ground, the trimmer blade nut and cup can easily
become worn. Replace them with new parts if this happens.
When you turn off the engine, check to ensure that the trimmer
blade has stopped rotating before you lower the product to the
ground. Even if the engine has been turned off, the blade can
still cause an injury while free-wheeling.
The silencer will remain hot for some time after the engine has
been turned off. Carry the product with the silencer away from
you to avoid touching it with your body.
When carrying the product, always turn the engine off and fit
the trimmer blade cover over the trimmer blade.
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