Maintenance - Makita UC3041A Instruction Manual

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− Before starting felling work, ensure that:
(1) Only persons involved in the felling operation
are in the vicinity;
(2) 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;
(3) The base of the trunk is free of foreign
objects, roots and ranches;
(4) 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;
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Loose or dry branches;
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Height of the tree;
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Natural overhang;
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Whether or not the tree is rotten.
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− 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.
006918
− 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.
1. Felling area
45 o
o
45
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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 back cut in time.
− Only plastic or aluminum wedges may be used to keep
the back cut 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.
− 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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009202

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Always wear
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inspection or maintenance.
Never use gasoline, benzine, thinner, alcohol or the
•
like. Discoloration, deformation or cracks may result.
Carry out the maintenance work described below at regular
intervals. Warranty 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 Makita Authorized or Factory Service Centers.
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1. Felling direction
2. Danger zone
3. Escape route
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gloves when performing any