Makita UC3541A, Инструкция по эксплуатации

Страница: 14 / 120

14
CAUTION:
•
If the saw chain does not stop immediately, do not
use the saw under any circumstances. Consult
Makita authorized service centers.
Checking the chain oiler
Before starting work, check the oil level in the tank, and
the oil delivery.
The oil level can be seen in the oil level sight shown in
the figure.
Fig.18
Check the oil delivery as follows:
Start the chain saw.
With the saw running, hold the saw chain approximately
15 cm above a tree trunk or the ground. If lubrication is
adequate, the oil spray will produce a light oil trace.
Observe the wind direction, and do not expose yourself
to the oil spray unnecessarily.
CAUTION:
•
If an oil trace is not formed, do not use the saw. The
lifespan of the chain will otherwise be reduced.
Check the oil level. Clean the oil feed groove and the
oil feed hole in the bar (refer to "MAINTENANCE ").
Adjusting the chain lubrication
Fig.19
You can adjust the oil pump feed rate with the adjusting
screw.
CAUTION:
•
Always use a front handle and rear handle and
firmly hold the tool by both front handle and rear
handle during operations.
•
Always secure the timber to be cut, otherwise the
cut fragments may cause personal injury.
WORKING WITH THE CHAIN SAW
Bucking
Fig.20
For bucking cuts, rest the spike bumper shown in the
figure on the wood to be cut.
With the saw chain running, saw into the wood, using
the rear handle to raise the saw and the front one to
guide it. Use the spike bumper as a pivot.
Continue the cut by applying slight pressure to the front
handle, easing the saw back slightly. Move the spike
bumper further down the timber and raise the front
handle again.
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.21
Cut wood under tension on the pressure side (A) first.
Then make the final cut on the tension side (B). This
prevents the bar from becoming trapped.
Fig.22
Limbing
CAUTION:
•
Limbing may only be performed by trained persons.
A hazard is presented by the risk of kick-back.
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.
Fig.23
Perform parallel-to-grain cuts at as shallow an angle as
possible. Carry out the cut as carefully as possible, as
the spike bumper cannot be used.
Felling
CAUTION:
•
Felling work may only be performed by trained
persons. The work is hazardous.
Observe local regulations if you wish to fell a tree.
Fig.24
− 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;
•
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.