Bedienungsanleitung Husqvarna 450e (Seite 13 von 36) (Englisch)

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GENERAL SAFETY PRECAUTIONS

English – 13

1153136-26 Rev.1 2009-12-29

Cutting equipment

This section describes how to choose and maintain your

cutting equipment in order to:

• Reduce the risk of kickback.

• Reduce the risk of the saw chain breaking or jumping

off the bar.

• Obtain optimal cutting performance.

• Extend the life of cutting equipment.

• Avoid increasing vibration levels.

General rules

• Only use cutting equipment recommended by us!

See instructions under the heading Technical data.

• Keep the chain’s cutting teeth properly

sharpened! Follow our instructions and use the

recommended ﬁle gauge.

A damaged or badly

sharpened chain increases the risk of accidents.

• Maintain the correct depth gauge setting! Follow

our instructions and use the recommended depth

gauge clearance.

Too large a clearance increases

the risk of kickback.

• Keep the chain properly tensioned! If the chain is

slack it is more likely to jump off and lead to increased

wear on the bar, chain and drive sprocket.

• Keep cutting equipment well lubricated and

properly maintained!

A poorly lubricated chain is

more likely to break and lead to increased wear on the

bar, chain and drive sprocket.

Cutting equipment designed to reduce

kickback

The only way to avoid kickback is to make sure that the

kickback zone of the bar never touches anything.

By using cutting equipment with ”built-in” kickback

reduction and keeping the chain sharp and well-

maintained you can reduce the effects of kickback.

Bar

The smaller the tip radius the lower the chance of

kickback.

Chain

A chain is made up of a number of links, which are

available in standard and low-kickback versions.

Some terms that describe the bar and chain

To maintain the safety features of the cutting equipment,

you should replace a worn or damaged bar or chain with

a bar and chain combinations recommended by

Husqvarna. See instructions under the heading Technical

Data for a list of replacement bar and chain combinations

we recommend.

Bar

• Length (inches/cm)

• Number of teeth on bar tip sprocket (T).

• Chain pitch (inches). The spacing between the drive

links of the chain must match the spacing of the teeth

on the bar tip sprocket and drive sprocket.

(14)

• Number of drive links. The number of drive links is

determined by the length of the bar, the chain pitch

and the number of teeth on the bar tip sprocket.

• Bar groove width (inches/mm). The groove in the bar

must match the width of the chain drive links.

• Chain oil hole and hole for chain tensioner. The bar

must be matched to the chain saw design.

(15)

Chain

• Chain pitch (inches) (14)

• Drive link width (mm/inches) (16)

• Number of drive links. (17)

Sharpening your chain and adjusting

depth gauge setting

General information on sharpening cutting teeth

• Never use a blunt chain. When the chain is blunt you

have to exert more pressure to force the bar through

the wood and the chips will be very small. If the chain

is very blunt it will produce wood powder and no chips

or shavings.

• A sharp chain eats its way through the wood and

produces long, thick chips or shavings.

• The cutting part of the chain is called the cutter and

consists of a cutting tooth (A) and the depth gauge

(B). The cutters cutting depth is determined by the

difference in height between the two (depth gauge

setting).

(18)

CAUTION! The mufﬂer gets very hot during and after

use. This also applies during idling. Be aware of the ﬁre

hazard, especially when working near ﬂammable

substances and/or vapours.

WARNING! Never use a saw without a

mufﬂer, or with a damaged mufﬂer. A

damaged mufﬂer may substantially

increase the noise level and the ﬁre

hazard. Keep ﬁre ﬁghting equipment

handy. If a spark arrestor screen is

required in your area, never use the saw

without or with a broken spark arrestor

screen.

WARNING! Faulty cutting equipment or

the wrong combination of bar and saw

chain increases the risk of kickback!

Only use the bar/saw chain combinations

we recommend, and follow the ﬁling

instructions. See instructions under the

heading Technical data.

IMPORTANT! No saw chain design eliminates the

danger of kickback.

WARNING! Any contact with a rotating

saw chain can cause extremely serious

injuries.

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