Jonsered CS 2121 EL Benutzerhandbuch

ENGLISH

• Take extreme care when cutting with the top chain (on the

underside of a log). The force of the chain action pushes the

saw backwards, and if the operator does not maintain fi rm

control, the kickback danger zone may move far enough

back into the kerf to produce a kickback. Cutting with the

bottom chain (on the top side of the log) pulls the saw for-

ward. This presses the power head fi rmly against the tree,

providing a steady support and giving the operator added

control over the saw and consequently over the kickback

danger zone.

• Follow the maintenance and sharpening instructions for the

chain and guide bar. When replacing chains and guide bars,

use only combinations recommended by us. See «Technical

Specifi cations».

• The smaller the bar nose radius, the smaller the kickback

danger zone and thus

the kickback tendency.

• By using low-kickback

cutting equipment and

keeping the cutters

properly sharpened, the

strength of a

kickback

can be greatly reduced.

KICKBACK PREVENTION

DANGER!
Kickbacks occur suddenly and without warning. A kickback may be violent enough to throw a

chainsaw back at the user. A running chain can infl ict severe and even fatal injury. It is imperative

for users to be familiar with the causes of kickbacks in order to exercise the proper care and use
working techniques to prevent kickback.

CAUTION!

Improperly sharpened cutters or the wrong chain and guide bar combination will
increase the risk of kickback. See «Technical Specifi cations» on page 3.

CAUTION!

Do not let the chain come in contact with the ground or any objects. Chain link and wire fencing
materials present a particular kickback hazard.

Observe all safety rules in order to avoid kickbacks and other

accidents which may cause injury.

• A kickback is a sudden reaction in which a chain saw is

thrown back as a result from contact with the upper part of

the bar nose known as the kickback danger zone.

• The direction of a kickback is always in the same plane as

the guide bar. The most common reaction is that the guide

bar and saw are thrown up and back towards the operator.

The saw can be thrown in other directions, depending on

the position of the saw at the moment of kickback.

Basic rules

• Knowing the cause and nature of a kickback helps reduce

or eliminate the element of surprise. Surprise increases the

danger of an accident. Most kickbacks are small, but some

are violent, and all are lightning-fast.

• Always grip the chain saw fi rmly with thumb and fi ngers

wrapped around the handles, right hand on the rear handle

and left hand on the front handle. All users, whether right or

left-handed, must use this grip, which will reduce the effect

of a kickback and help keep the saw under control.

Do not let go of the chain saw handles!

• Most accidents caused by kickbacks take place in con-

nection with limbing. Make certain your footing is secure

and that there are no objects nearby which may trip you

or make you lose your balance. If you are not careful, the

kickback danger zone could make contact with a branch,

a nearby tree or some other object which could cause a

kickback.

• Never use a chain saw to cut above shoulder height, and

do not cut with the guide bar nose. Never operate a chain

saw while holding it with only one hand!

• Maintain full speed while cutting.