Manual Metabo KT 1441 (page 19 of 128) (All languages)

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If the tree trunk is supported at both ends as

shown, first cut through a third of the trunk diam-

eter from the top side, then cut through the

remaining

2/3 from the bottom side level with the top cut.

Delimbing trees

This is the process of cutting branches from a

felled tree. In the case of large, downward-growing

branches that support the tree, cut up the tree

trunk before delimbing. Cut off smaller branches

with a single cut as shown in the illustration.

Branches that are under tension should be cut

from below to avoid jamming the saw.

Felling a tree

If two or more persons are cutting and felling trees

at the same time, the clearance between the felling

and cutting persons should be equal to at least

twice the height of the tree to be felled. When

felling trees, it must be ensured that no other

persons are exposed to danger, no supply lines

are damaged and no property damage is caused.

Should a tree come in contact with a supply line,

the utility company must be informed immediately.

When performing sawing jobs on a slope, the

chainsaw operator should remain above the tree to

be felled, since the tree will probably roll or slip

downhill after being felled.

Before felling, an escape route should be planned

and, if necessary, cleared. The escape route

should lead diagonally backwards away from the

direction in which the tree is expected to fall (see

figure).

Before felling, the natural inclination of the tree, the

position of large branches and the wind direction

must be taken into account when assessing the

direction in which the tree is expected to fall.

Dirt, stones, loose bark, nails, clamps and wire

must be removed from the tree.

Starting a notch:

Saw a notch (A) with a depth of 1/3 of the tree's

diameter at a right angle to the falling direction, as

shown in the figure.

First cut the bottom, horizontal notch. Jamming of

the chainsaw or guide bar when cutting the notch

can thus be avoided.

Starting a felling cut:

Start the felling cut (B) at least 50 mm above the

horizontal notch (see figure). Execute the felling cut

parallel to the horizontal notch cut. Make the felling

cut deep enough so that a breaking bar (C)

remains in position and can act as a hinge. The bar

prevents the tree from turning and falling in the

wrong direction. Do not saw through the bar.

Width of the bar (C): 50 mm.

When the felling cut approaches the bar, the tree

should start to fall. If it becomes apparent that the

tree will possibly not fall in the desired direction, or

inclines back and the sawing chain jams, interrupt

the felling cut and use wedges made of wood,

plastic or aluminium to open the cut and return the

tree back to the desired felling line.

When the tree starts falling, remove the chainsaw

from the cut, switch it off, set it down and leave the

danger zone via the planned escape route. Watch

out for falling branches and take care not to

stumble.

Retensioning the sawing chain

When working with the chainsaw, the sawing chain

expands as a result of heat. It then starts to sag

and can jump out of the cutter groove.

Check the chain tension (as specified in chapter

7.1) and retighten the chain if necessary.

If the sawing chain is retensioned when it is hot, at

the end or work it must be slackened because

otherwise cooling could result in high contraction

tension.

Insufficient chain lubrication

If the oil reservoir is still almost full after chainsaw

operation of around 20 minutes, it may be that the

oil channel (12) of the machine, or the oil inlet bore

(14) of the cutter, is obstructed and has to be

cleaned.

1.) 1/3

2.) 2/3

1.) 1/3

2.) 2/3

Emergency

escape

route

Emergency

escape

route

Danger zone

FELLING

DIRECTION

1/3

17026724_1207 KT 1441.book Seite 19 Montag, 10. Dezember 2007 2:11 14

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Metabo KT 1441 Manual

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