Manual Al-ko AL-KO 142 (page 35 of 124) (English, German, Dutch, French, Italian, Spanish)

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Using your brushcutter

ENGLISH 15

8.4 Sharpening instruction for brush blade

When dull, the

cutter blade’s

edges can be

re-sharpened

on both sides

with a flat file

at an angle

of 30°.

All cutting edges need to be filed back equally, if the

wear and tear is substantial, or if there are broken-off

cutting edges. It is necessary to check for imbalance

and if necessary, to make corrections by additional

filing. The sharpening angle is 30°.

8.5 Information regarding the line head

(available as accessory)

When using the nylon head, always ensure that you

operate only with the correct length of line. When the

contact shield is fitted, the line will always be

trimmed to the permissible length automatically (a

line trimming blade is fitted into the shield). There is

a high risk of injury, and the engine is subjected to

excessive loads leading to a risk of damage, if nylon

lines are left too long.

Therefore, when converting the cutting tool from

grass cutter blade to nylon head, always fit the

standard contact shield together with the protective

bar and fitted line trimming blade.

Adjusting the cutting line

When using a semi-automatic nylon head:

(schematic diagram)

Whilst the brushcutter is running without load, but

with rotating nylon head, lightly push the nylon head

several times onto ground with growth cover. The

cutting line will be dispensed in stages. With each

action, approx. 30 mm line will be dispensed. The

line trimming blade will correct any excess length.

When the cutting line is fully spent, you can replace it

with line available Ø 2,4 mm under part no. 6900942

or Ø 3,0 mm part no. 6900974 (accessory).

8.6 Information regarding the chisel tooth

blade (available as accessory)

The circular saw blade is only to be used together

with the metal guard, Part No. 6012841. The blade is

used for cutting bushes and trees up to 5 cm (2

inches) branch/trunk diameter.

For optimum cutting, the engine is accelerated to full

throttle prior to making contact with the brush or tree.

The cutting is done evenly without angling the cutting

blade.

Work with the left stop edge (sector A).

Increased risk of accident and kickback exists

in sector C. Solid material should not be cut in

this sector.

There are work techniques for tree chopping

which allow using sectors B and D. These are

only to be utilized by professional operators

since there is a potential for kick-back.

Sharpening instructions for Chisel-tooth circular

saw blade

A dull circular saw blade can be sharpened with a 6.3

mm / 1/4" round file in a filing guide. Sharpening

angle is 20° and clamping angle is 5°-10°. If the

circular saw blade becomes worn, it is necessary to

have it sharpened at a Service Center.

Fig. 15

Fig. 16

Fig. 17

Fig. 18

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Al-ko AL-KO 142 Manual

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