Maintenance - Makita DUC355 Instruction Manual

NOTICE:
When making several cuts, switch the
chain saw off between cuts.
CAUTION:
If the upper edge of the bar is used
for cutting, the chain saw may be deflected in
your direction if the chain becomes trapped. For
this reason, cut with the lower edge, so that the
saw will be deflected away from your body.
► Fig.22
When you cut a wood under tension, cut the pressured
side (A) first. Then make the final cut from the tensioned
side (B). This prevents the bar from becoming trapped.
► Fig.23
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 pres-
ents 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 train-
ing. 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.24
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.25: 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 swell-
ings. 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.26: 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.27
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 horizontal. Leave
approximately 1/10 of the trunk diameter between the back
cut and the scarf. The wood fibers in the uncut trunk por-
tion act as a hinge. Insert wedges into the back cut in time.
► Fig.28
WARNING:
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 cartridge with the battery cover.
► Fig.29: 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.
15 ENGLISH
Do not cut right through the fibers