Bedienungsanleitung Dolmar PS-500 (Seite 11 von 80) (Englisch, Französisch)

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To avoid kickback

The best protection from personal-injury that may result

from kickback is to avoid kickback situations:

1. Hold the chain saw rmly with both hands and

maintain a secure grip.

2. Be aware of the location of the guide bar nose at

all times.

3. Never bring the nose of the guide bar in contact

with any object. Do not cut limbs with the nose of

the guide bar. Be especially careful with small,

tough limbs, small size brush and saplings which

may easily catch the chain.

4. Don’t overreach.

5. Don’t cut above shoulder height.

6. Begin cutting and continue at full throttle.

7. Cut only one log at a time.

8. Use extreme caution when re-entering a previous

cut.

9. Do not attempt plunge cuts (see page 14) if you are

not experienced with these cutting techniques.

10. Be alert for shifting of the log or other forces that

may cause the cut to close and pinch the chain.

11. Maintain saw chain properly. Cut with a correct-

ly sharpened, properly tensioned chain at all

times.

12. Stand to the side of the cutting path of the chain

saw.

Many factors inuence the occurence and force of

the kickback reaction. The type of bar and saw chain you

use is a factor in the force of the kickback reaction.

The speed of contact at which the cutter contacts

the object.

Kickback force increase with the rate of impact.

The contact angle between the nose of the bar

and the foreign object (g. 11).

Kickback is most pronounced in the upper quadrant

of the bar nose.

DOLMAR chain types are designed to reduce kickback

forces.

The depth gauges:

Improper lowering of the depth gauges also increases

the risk of a kickback.

Saw chain cutter sharpness:

WARNING!

A dull improperly sharpened chain may increase

the risk of kickback. Always cut with a properly

sharpened chain.

Devices for reducing the risk of kickback injury

DOLMAR have developed a special chain brake to

reduce the risk of kickbacks.

This chain brake increases the safety factor on the

job, e.g. when the saw suddenly bucks upwards the

chain stops rotating within a fraction of a second. A

deection guard on the disengaging lever of the chain

brake and a scoop rear handle ensure that the opera-

tor’s hands are fully protected at all times.

Kickback tendency increases as the radius or size of

the guide bar nose increases. DOLMAR have devel-

oped guide bars with small nose radius, to reduce the

kickback tendency.

WARNING!

No chain brake prevents kickback.

These brakes are designed only to stop the chain,

if activated.

To ensure a proper operation of the chain brake, it

must be properly maintained. Furthermore, there

must be a sufcient distance between the opera-

tor and the bar to ensure that the chain brake has

sufcient time to activate and stop the chain before

potential contact with the operator.

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Dolmar PS-500 Seite 11

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