Reactive Forces - Stihl MSA 120 C Gebrauchsanleitung

4 Safety Precautions
4.8

Reactive Forces

4.8.1 Kickback
Kickback can be caused for the following reasons:
– The rotating saw chain in the upper quadrant of the bar
nose makes contact with a hard object and is suddenly
braked.
– The rotating saw chain is pinched at the bar nose.
If kickback occurs, the saw can be thrown up in the direction of
the operator. The operator can lose control of the saw and be
seriously or fatally injured.
► Hold the saw firmly with both hands.
► Operate the saw as described in this instruction manual.
► Do not cut with the upper quadrant of the bar nose.
► Always cut with a properly sharpened and tensioned saw
chain.
► Use a reduced kickback saw chain.
► Use a guide bar with a narrow radius nose.
► Always cut with the chain running a full speed.
MSA 120 C
4.8.2 Pull-in
The saw is pulled away from the operator when the bottom of
the bar is used for cutting.
If the rotating chain makes contact with a hard object and is
suddenly pinched, the saw is abruptly jerked away from the
operator. The operator can lose control of the saw and be
seriously or fatally injured.
► Hold the saw firmly with both hands.
► Operate the saw as described in this instruction manual.
► Keep the guide bar straight in the cut.
► Apply the spiked bumper properly.
► Always cut with the chain running a full speed.
4.8.3 Pushback
The saw is pushed back toward the operator when the top of
the bar is used for cutting.
English
59