Makita UC3020A Instruction Manual page 15

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1. Felling area
MAINTENANCE
Observe local regulations if you wish to fell a tree.
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- Before starting felling work, ensure that:
45 o
(1)
(2)
o
45
(3)
(4)
- Consider the following with respect to each tree:
•
•
•
•
•
- 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
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vertical cut first, then the horizontal cut.
- Cut a scarf: 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. Cut
the 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.
- Cut any corrections to the scarf across its entire width.
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- Make the back cut a little higher than the base cut of the scarf. The back
cut must be exactly horizontal. 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. Do not cut right
through the fibers under any circumstances, as the tree will otherwise fall
unchecked. Insert wedges into the scarf in time.
- Only plastic or aluminum wedges may be used to keep the scarf open.
The use of iron wedges is prohibited.
- 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.
CAUTION:
• Always be sure that the tool is switched off and unplugged before
attempting to perform inspection or maintenance.
• Always wear gloves when performing any inspection or maintenance.
Carry out the maintenance work described below at regular intervals. War-
ranty claims will be accepted only if these operations have been performed
regularly and properly.
Only maintenance work described in this instruction manual may be performed
by the user. Any other work must be carried out by a MAKITA specialist repair
shop.
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.
Direction of lean;
Loose or dry branches;
Height of the tree;
Natural overhang;
Whether or not the tree is rotten.
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