Poulan 1420 Manuel d'utilisateur télécharger pdf (Page 4)

GUARD AGAINST KICKBACK

Follow all safety rules to help avoid kick-

back and other forces which can result in

serious injury.

Kickback Path

oid Obstructions

Clear The Working Area

WARNING: Avoid kickback which

can result in serious injury. Kickback is

the backward, upward or sudden for-

ward motion of the guide bar occurring

when the saw chain nearthe upper tip of

the guide bar c ontacts any object such

as a log or branch, or when the wood

closes in and pinches the saw chain in

the c ut. Contacting a foreign object in

the wood ca n also result in loss of chain

saw control.

S RotationalKickback can oc cur when

the moving chain contacts an object at

the upper tip of the guide bar. This con-

tact can c ause the chain to dig into the

object, which stops the c hain for an

instant. The result is a lightning fast,

reverse reaction which kicks the guide

bar up and back toward the operator.

S Pinch-Kickback can o ccur when the

the wood closes in and pinches the

moving s aw chain in the cut along the

top of the guide bar and the saw chain

is suddenly stopped. This s udden

stopping of the cha in results in a rever-

sal of the chain force used to cut wood

and c auses the saw to move in the op-

posite direction of the chain rotation.

The s aw is driven straight back toward

the operator.

S Pull-In canoccurwhenthemoving

chain contacts a foreign object in the

wood in the cut along the bottom of the

guide bar and the saw chain is s ud-

denly stopped. This sudden s topping

pulls the saw forward and away from

the operator and could easily cause

the operator to lose control of the saw.

REDUCE THE CHANCE OF

KICKBACK

The followi ng precautions should be fol-

lowed to minimize kickback:

S Recognize that kickback can happen.

Wit h a basic understandi ng of kickback,

you can reduce the eleme nt of surpri se

which contri but es to accidents.

S Never let the moving chain contact

any object at the tip of the guide bar.

S Keep working area free from obstruc-

tions such as other trees, branches,

rocks, fences, stumps, etc. Eliminate

or avoid any obstruction that y our saw

chain c ould hit while c utting.

S When cutting a branch, do not let the

guide bar c ontact another branch or

other objects around it.

S Keep saw c hain sharp and properly

tensioned.A loose or dull chain can in-

crease the chance of kickback. Follow

manufacturer’s c hain sharpening and

maintenance instructions. Check ten-

sion at regular intervals, but never with

engine running. Make sure ba r mount-

ing n uts are securely tightened.

S Begin and continue cutting at full

speed. If the chain is moving at a slow-

er speed, there is greater chance of

kickback occurring.

S Use extreme caution when re-enter-

ing a cut.

S Do not attempt cuts starting with the tip

of the bar (plunge cuts).

S Watch for shifting logs or other objects

that could close a cut and pinch or fall

onto c hain.

S Use the spec ified Reduced-Kickback

Guide Ba r and Low Kickback Chain.

Avoid Pinch--Kickback:

S Be extremely aware of situati ons or ob-

str u cti ons that can cause material to

pinch the top of or otherwi se stop th e

chain.

S Do not cut more than one log at a time.

S Do not twist the saw as the bar is with-

drawn from an undercut when bucking.

A voi d Pull-In:

S Always begin cutting with the saw at

full speed a nd the saw housing

against wood.

S Use wedges made of plastic or wood.

Never use metal to hold the cut open.

MAINTAIN CONTROL

Never Reverse

Hand Positions

Correct Position Correct Grip Incorrect Grip

eep a

irm grip

with both hands,

left thumb under

handle

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Poulan 1420 Manuel d'utilisateur Page 4

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