Bedienungsanleitung Al-ko 643 IP (Seite 44 von 622) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Türkisch, Schwedisch, Norwegisch, Finnisch)

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8. MAINTENANCE AND STORAGE

44 469601_a

– If necessary, clean the sponge pre-filter (3a)

and filtering element (3) with hot soapy water

or detergent or clean with a jet of compressed

air.

– Eliminate all sawdust and dirt residue in the

filter housing (4) being careful it does not pe-

netrate into the suction duct (5).

– Reassemble the filtering element (3) and

sponge pre-filter (3a) only when thoroughly

dry.

– Remount the cover (2).

Models 46 and 52

To clean the filter (Fig. 23):

– Move the front hand guard forward.

– Using a screwdriver, remove the three side

springs (1) and the cover (2).

– Extract the starter knob (3) and, using pliers,

extract the two side stops (4).

– Remove the filter element (5) and tap it gently

to remove any dirt and, if necessary, clean it

with hot soapy water or detergent. If you are

using compressed air, aim the jet so that it

blows from the inside towards the outside.

– Eliminate all sawdust and dirt residue in the

filter housing (6) being careful it does not pe-

netrate into the suction duct (7).

– Reassemble the filter element (5) only when

thoroughly dry, being careful to perfectly line

up the two side protrusions (8) with the filter

housing protrusions.

– Reassemble the two side stops (4).

– Reassemble the cover (2) and hook the three

springs (1).

CHECKING THE SPARK PLUG (Fig. 24)

The spark plug can be accessed by removing the

air filter cover.

Periodically remove and clean the spark plug

using a metal brush to get rid of any deposits.

Check and reset the correct distance between the

electrodes.

Replace the spark plug and fasten it firmly using

the supplied wrench.

The spark plug must be replaced with one with

the same characteristics whenever the electrodes

have burnt or the insulation has worn, and in any

case every 100 working hours.

TUNING THE CARBURETTOR

The carburettor is tuned by the manufacturer to

achieve maximum performance in all situations,

with a minimum emission of toxic gas in compli-

ance with the regulations in force.

When performance is poor, first check that the

chain runs smoothly and the bar rails are not dis-

torted, then contact your dealer to check the car-

burettor and the engine.

Tuning minimum speed

CAUTION!

The chain must not move when the

engine is running idle. If the chain mo-

ves when the engine is running idle,

contact your dealer to correctly regu-

late the engine.

SHARPENING THE CHAIN

CAUTION!

To ensure that the chain saw works

safely and efficiently, it is essential

that the cutting components are well

sharpened.

Sharpening is necessary when:

The sawdust looks like dust.

Cutting becomes more difficult.

The cut is not straight.

Vibrations increase.

Fuel consumption increases.

CAUTION!

If the chain is not sufficiently sharpe-

ned, the risk of kick-back increases.

A specialist centre will sharpen the chain using the

right tools to ensure minimum removal of material

and even sharpness on all the cutting edges.

If you sharpen the chain yourself, use special

round-section files with the right diameter depen-

ding on the type of chain (see Chain maintenance

table). You need a certain amount of skill and ex-

perience to avoid damaging the cutting edges.

Sharpen the chain as follows (Fig. 25):

– Switch off the engine, release the chain brake

and secure the bar with the chain in a vice so

that the chain can run smoothly.

– Tighten the chain if it is loose.

– Mount the file in the guide and then insert it in

the tooth at a constant angle from the cutting

edge.

– Sharpen in a forward motion a few times and

repeat this on all the cutting edges facing the

same way (right or left).

– Turn the bar over in the vice and repeat on all

the other cutting edges.

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Al-ko 643 IP Seite 44

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