Manual Stihl MS390 (page 19 of 126) (Spanish)

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English / USA

MS 290, MS 310, MS 390

B = Pushback

Pushback occurs when the chain on the

top of the bar is suddenly stopped when

it is pinched, caught or encounters a

foreign object in the wood. The reaction

of the chain may drive the saw rapidely

straight back toward the operator and

may cause loss of saw control.

Pushback frequently occurs when the

top of the bar is used for cutting.

To avoid pushback

1. Be alert to forces or situations that

may cause material to pinch the top

of the chain.

2. Do not cut more than one log at a

time.

3. Do not twist the saw when

withdrawing the bar from a plunge

cut or underbuck cut because the

chain can pinch.

Cutting Techniques

Felling

Felling is cutting down a tree.

Before felling a tree, consider carefully

all conditions which may affect the

direction of fall.

!Warning!

There are a number of factors that may

affect and change the intended direction

of fall, e.g. wind direction and speed,

lean of tree, surrounding trees and

obstacles, sloping ground, one-sided

limb structure, wood structure, decay,

snow load, etc. To reduce the risk of

severe or fatal injury to yourself or

others, look for these conditions prior to

beginning the cut, and be alert for a

change in direction while the tree is

falling.

!Warning!

Always observe the general condition of

the tree. Inexperienced users should

never attempt to cut trees that are

decayed or rotted inside or that are

leaning or otherwise under tension.

There is an increased risk that such

trees could snap or split while being cut

and cause serious or fatal injury to the

operator or bystanders. Also look for

broken or dead branches which could

vibrate loose and fall on the operator.

When felling on a slope, the operator

should stand on the uphill side if

possible.

Felling Instructions:

When felling, maintain a distance of at

least 2 1/2 tree lengths from the nearest

person.

When felling in the vicinity of roads,

railways and power lines, etc., take extra

precautions. Inform the police, utility

company or railway authority before

beginning to cut.

!Warning!

The noise of your engine may drown any

warning call.

001BA038 KN

001BA088 LÄ

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Stihl MS390 User Manual - English - 126 pages

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Stihl MS390 Manual

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