Ryobi P542 Manuel d'utilisateur télécharger pdf (Page 4)

4 - English

GENERAL SAFETY RULES

KICKBACK

See Figures 1 - 3.

 WARNING: Kickback may occur when the

moving chain contacts an object at the upper

portion of the tip of the guide bar or when the

wood closes in and pinches the saw chain in

the cut. Contact at the upper portion of the tip

of the guide bar can cause the chain to dig into

the object and stop the chain for an instant.

The result is a lightning fast, reverse reaction

which kicks the guide bar up and back toward

the operator. If the saw chain is pinched along

the top of the guide bar, the guide bar can be

driven rapidly back toward the operator. Either

of these reactions can cause loss of saw control

which can result in serious injury. Do not rely

exclusively upon the safety devices built into

the saw. As a chain saw user, you should take

several steps to keep your cutting jobs free from

accident or injury.

 The following precautions should be followed

to minimize kickback:

1. Hold the saw firmly with both hands when

the motor is running. Place your right hand

on the rear handle and your left hand on the

front handle with your thumbs and fingers

encircling the chain saw handles. A firm grip

together with a stiff left arm will help you

maintain control of the saw if kickback occurs.

2. Make sure that the area in which you are cut-

ting is free from obstructions. Do not let the

nose of the guide bar contact a log, branch,

fence, or any other obstruction that could be

hit while you are operating the saw.

3. Always cut with the unit running at full speed.

Fully squeeze the switch trigger and maintain

a steady cutting speed.

4. Use replacement parts such as low kickback

chain and special guide bars that reduce the

risks associated with rotational kickback.

Use only the replacement guide bars and low

kickback chains specified by the manufacturer

for the saw.

 With a basic understanding of kickback, you

can reduce or eliminate the element of surprise.

Sudden surprise contributes to accidents.

 Keep proper footing and balance at all times.

 Do not cut above shoulder height or overreach when

cutting.

 Follow the sharpening and maintenance instruc-

tions for the saw chain.

 Push and Pull - This reaction force is always

opposite to the direction the chain is moving

where wood contact is made. Thus, the operator

must be ready to control the PULL when cutting

on the bottom edge of the bar, and PUSH when

cutting along the top edge. See Figure 3.

Fig. 1

Fig. 2

Fig. 3

ROTATIONAL

KICKBACK

KICKBACK

DANGER ZONE

PULL

PUSH

1 2 3 4 5 6 7 8 9 ... 75 76

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