Makita LXT DUC303Z - Инструкция по эксплуатации - Страница 15

15 ENGLISH

Observe local regulations if you wish to fell a tree.

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Fig.28:

1.

 Felling area

—  Before starting felling work, ensure that:

• 

Only persons involved in the felling operation 

are in the vicinity;

• 

Any person involved has an unhindered path 

of retreat through a range of approximately 

45° either side of the felling axis. Consider 

the additional risk of tripping over electrical 

cables;

• 

The base of the trunk is free of foreign 

objects, roots and ranches;

• 

No persons or objects are present over a 

distance of 2 1/2 tree lengths in the direction 

in which the tree will fall.

—  Consider the following with respect to each tree:

• 

Direction of lean;

• 

Loose or dry branches;

• 

Height of the tree;

• 

Natural overhang;

• 

Whether or not the tree is rotten.

—  Consider the wind speed and direction. Do not 

carry out felling work if the wind is gusting strongly.

—  Trimming of root swellings: Begin with the largest 

swellings. Make the vertical cut first, then the 

horizontal cut.

—  Stand to the side of the falling tree. Keep an area 

clear to the rear of the falling tree up to an angle of 

45° either side of the tree axis (refer to the “felling 

area” figure). Pay attention to falling branches.

—  An escape path should be planned and cleared 

as necessary before cuts are started. The escape 

path should extend back and diagonally to the rear 

of the expected line of fall as illustrated in figure.

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Fig.29:

1.

 Felling direction 

2.

 Danger zone 

3.

 Escape route

When felling trees, follow the proceduers below:

1.

Cut a scarf as close to the ground as possible. 

First make the horizontal cut to a depth of 1/5 -1/3 of the 

trunk diameter. Do not make the scarf too large. Then 

make the diagonal cut.

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Fig.30

NOTE:

 The scarf determines the direction in which 

the tree will fall, and guides it. It is made on the side 

towards which the tree is to fall.

2.

Make the back cut a little higher than the base 

cut of the scarf. The back cut must be exactly horizon-

tal. Leave approximately 1/10 of the trunk diameter 

between the back cut and the scarf. The wood fibers in 

the uncut trunk portion act as a hinge. Insert wedges 

into the back cut in time.

► 

Fig.31

WARNING:

Do not cut right through the fibers 

under any circumstances.

 The tree will otherwise 

fall unchecked.

NOTICE:

Only plastic or aluminum wedges may 

be used to keep the back cut open. The use of 

iron wedges is prohibited.

Carrying tool

Before carrying the tool, always apply the chain brake 

and remove the battery cartridges from the tool. Then 

attach the guide bar cover. Also cover the battery car

-

tridge with the battery cover.

► 

Fig.32:

1.

 Guide bar cover 

2.

 Battery cover

MAINTENANCE

CAUTION:

Always be sure that the tool is 

switched off and the battery cartridge is removed 

before attempting to perform inspection or 

maintenance.

CAUTION:

Always wear gloves when perform-

ing any inspection or maintenance.

NOTICE:

Never use gasoline, benzine, thinner, 

alcohol or the like. Discoloration, deformation or 

cracks may result.

Sharpening the saw chain

Sharpen the saw chain when:

• 

Mealy sawdust is produced when damp wood is 

cut;

• 

The chain penetrates the wood with difficulty, even 

when heavy pressure is applied;

• 

The cutting edge is obviously damaged;

• 

The saw pulls to the left or right in the wood. 

(caused by uneven sharpening of the saw chain or 

damage to one side only)

Sharpen the saw chain frequently but a little each time. 

Two or three strokes with a file are usually sufficient for 

routine resharpening. When the saw chain has been 

resharpened several times, have it sharpened in our 

authorized service center.

Sharpening criteria:

WARNING:

An excessive distance between 

the cutting edge and depth gauge increases the 

risk of kickback.

► 

Fig.33:

1.

 Cutter length 

2.

 Distance between cutting 

edge and depth gauge 

3.

 Minimum cutter 

length (3 mm)

—  All cutter length must be equal. Different cutter 

lengths prevent the saw chain from running 

smoothly and may cause the saw chain to break.

—  Do not sharpen the chain when the cutter length 

has reached 3 mm or shorter. The chain must be 

replaced with new one.

—  The chip thickness is determined by the distance 

between the depth gauge (round nose) and the 

cutting edge.

—  The best cutting results are obtained with following 

distance between cutting edge and depth gauge.

• 

Chain blade 90PX : 0.65 mm (0.025″)

• 

Chain blade 91PX : 0.65 mm (0.025″)

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Fig.34