18 ENGLISH
Limbing
CAUTION:
Limbing may only be performed by
trained persons.
A hazard is presented by the risk
of kickback.
When limbing, support the chain saw on the trunk if possible. Do not
cut with the tip of the bar, as this presents a risk of kickback.
Pay particular attention to branches under tension. Do
not cut unsupported branches from below.
Do not stand on the felled trunk when limbing.
Burrowing and parallel-to-grain cuts
CAUTION:
Burrowing and parallel-to-grain
cuts may only be carried out by persons with
special training.
The possibility of kickback presents
a risk of injury.
Perform parallel-to-grain cuts at as shallow an angle as
possible. Take an extra caution when carrying out the
cut as the spike bumper cannot be used.
►
Fig.27
Felling
CAUTION:
Felling work may only be per-
formed by trained persons.
The work is hazardous.
Observe local regulations if you wish to fell a tree.
►
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.
►
Fig.29:
1.
Felling direction
2.
Danger zone
3.
Escape route
When felling trees, follow the procedures 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.
►
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 cartridge 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.
To maintain product SAFETY and RELIABILITY,
repairs, any other maintenance or adjustment should
be performed by Makita Authorized or Factory Service
Centers, always using Makita replacement parts.
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)
Summary of Contents for UC012G
Page 2: ...2 Fig 1 1 2 3 4 5 6 11 13 15 12 9 14 16 7 8 10 Fig 2 ...
Page 3: ...3 1 1 2 3 Fig 3 1 2 Fig 4 1 2 Fig 5 1 2 Fig 6 2 3 1 2 3 1 Fig 7 1 Fig 8 ...
Page 4: ...4 3 2 1 Fig 9 1 Fig 10 1 2 Fig 11 1 3 2 Fig 12 1 Fig 13 3 2 1 Fig 14 ...
Page 5: ...5 1 Fig 15 3 2 1 Fig 16 1 Fig 17 1 2 Fig 18 1 2 3 Fig 19 1 2 Fig 20 Fig 21 ...
Page 6: ...6 Fig 22 Fig 23 Fig 24 Fig 25 A B A B Fig 26 Fig 27 2 1 2 45o 1 45o Fig 28 1 2 2 3 3 Fig 29 ...
Page 8: ...8 Fig 38 Fig 39 1 2 Fig 40 1 2 Fig 41 1 2 Fig 42 ...
