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8
Causes and Operator Prevention of Kickback
Kickback may occur when the nose or tip of the guide bar touches an object, or when the
wood closes in and pinches the saw chain in the cut.
Tip contact in some cases may cause a sudden reverse reaction, kicking the guide bar up
and back towards the operator.
Pinching the saw chain along the top of the guide bar may push the guide bar rapidly
back towards the operator.
Either of these reactions may cause you to lose control of the saw, which could result in
serious personal injury. Do not rely exclusively upon the safety devices built into your saw.
As a chain saw user, you should take several steps to keep your cutting jobs free from
accident or injury.
Kickback is the result of tool misuse and/or incorrect operating procedures or conditions
and can be avoided by taking proper precautions as given below:
•
Maintain a firm grip, with thumbs and fingers encircling the chain saw handles,
position your body and arm to allow you to resist kickback forces. Kickback forces
can be controlled by the operator, if proper precautions are taken. Do not let go of the
chain saw.
•
Do not overreach and do not cut above shoulder height. This helps prevent
unintended tip contact and enables better control of the chain saw in unexpected
situations.
•
Only use replacement bars and chains specified by the manufacturer. Incorrect
replacement bars and chains may cause chain breakage and/or kickback.
•
Follow the manufacturer's sharpening and maintenance instructions for the saw
chain. Decreasing the depth gauge height can lead to increased kickback.
Kickback Safety Devices on This Chain Saw
Rotatable Baffle
The chainsaw is equipped with a rotatable baffle
that covers the outside of the chain and
automatically opens at an Angle as you cut
deeper, shielding the sawdust and keeping you
out of the chain during kickback.
Never modify or attempt to
disable the rotatable baffle.
Make sure that the rotatable baffle is working
properly before using the chain saw. The
rotatable baffle should be easy to open and reset.
To test the operation of the rotatable baffle,
perform the following stes (Fig. 1):
•
Position the chainsaw vertically and pull the
rotatable baffle by hand until it is 100 ° wide.
•
Let go of the hand, the correct rotatable baffle
will bounce back to the original position. If the
rotatable baffle is not working properly, do not
use a chainsaw until it is repaired by a qualified
service technician.
Confirm that the rotatable baffle works properly before each use.
If the rotatable baffle is clogged with wood chips, the function of the
chain brake may deteriorate. Always keep the device clean.
Fig.1
Baffle in the
max open
position
Baffle in
original
position