Makita DUC307 Manual De Instrucciones página 17

Working with the chain saw
CAUTION:
The first time user should, as a
minimum practice, do cutting logs on a saw-horse
or cradle.
CAUTION:
When sawing precut timber, use a
safe support (saw horse or cradle). Do not steady
the workpiece with your foot, and do not allow
anyone else to hold or steady it.
CAUTION:
Secure round pieces against
rotation.
CAUTION:
Keep all parts of the body away
from the saw chain when the motor is operating.
CAUTION:
Hold the chain saw firmly with
both hands when the motor is running.
CAUTION:
Do not overreach. Keep proper
footing and balance at all times.
NOTICE:
Never toss or drop the tool.
NOTICE:
Do not cover the vents of the tool.
B r i n g t h e b o t t o m e d g e o f t h e c h a i n s a w b o d y i n t o
c o n t a c t w i t h t h e b r a n c h t o b e c u t b e f o r e s w i t c h i n g o n .
O t h e r w i s e i t m a y c a u s e t h e g u i d e b a r t o w o b b l e , r e s u l t -
ing in injury to operator. Saw the wood to be cut by just
m o v i n g i t d o w n b y u s i n g t h e w e i g h t o f t h e c h a i n s a w .
► Fig.23
I f y o u c a n n o t c u t t h e t i m b e r r i g h t t h r o u g h w i t h a s i n g l e
s t r o k e :
A p p l y l i g h t p r e s s u r e t o t h e h a n d l e a n d c o n t i n u e s a w i n g
a n d d r a w t h e c h a i n s a w b a c k a l i t t l e ; t h e n a p p l y t h e
spike bumper a little lower and finish the cut by raising
t h e h a n d l e .
► Fig.24
Bucking
1.
R e s t t h e b o t t o m e d g e o f t h e c h a i n s a w b o d y o n
t h e w o o d t o b e c u t .
► Fig.25
2. W i t h t h e s a w c h a i n r u n n i n g , s a w i n t o t h e w o o d
w h i l e u s i n g t h e r e a r h a n d l e t o r a i s e t h e s a w a n d t h e
f r o n t o n e t o g u i d e i t . U s e t h e s p i k e b u m p e r a s a p i v o t .
3.
C o n t i n u e t h e c u t b y a p p l y i n g s l i g h t p r e s s u r e t o
t h e f r o n t h a n d l e , e a s i n g t h e s a w b a c k s l i g h t l y . M o v e
t h e s p i k e b u m p e r f u r t h e r d o w n t h e t i m b e r a n d r a i s e t h e
f r o n t h a n d l e a g a i n .
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.26
W h e n y o u c u t a w o o d u n d e r t e n s i o n , c u t t h e p r e s s u r e d
side (A) first. Then make the final cut from the tensioned
s i d e ( B ) . T h i s p r e v e n t s t h e b a r f r o m
► Fig.27
b e c o m i n g t r a p p e d .
17 ENGLISH
Limbing
CAUTION:
Limbing may only be performed by
trained persons. A h a z a r d i s p r e s e n t e d b y t h e r i s k
o f k i c k b a c k .
W h e n l i m b i n g , s u p p o r t t h e c h a i n s a w o n t h e t r u n k i f
p o s s i b l e . D o n o t c u t w i t h t h e t i p o f t h e b a r , a s t h i s p r e s -
e n t s a r i s k o f k i c k b a c k .
P a y p a r t i c u l a r a t t e n t i o n t o b r a n c h e s u n d e r t e n s i o n . D o
n o t c u t u n s u p p o r t e d b r a n c h e s f r o m
D o n o t s t a n d o n t h e f e l l e d t r u n k w h e n l i m b i n g .
Burrowing and parallel-to-grain cuts
CAUTION:
Burrowing and parallel-to-grain
cuts may only be carried out by persons with
special training. T h e p o s s i b i l i t y o f k i c k b a c k p r e s e n t s
a risk of injury.
P e r f o r m p a r a l l e l - t o - g r a i n c u t s a t a s s h a l l o w a n a n g l e a s
p o s s i b l e . T a k e a n e x t r a c a u t i o n w h e n c a r r y i n g o u t t h e
c u t a s t h e s p i k e b u m p e r c a n n o t b e u s e d .
► Fig.28
Felling
CAUTION:
Felling work may only be per-
formed by trained persons. T h e w o r k i s h a z a r d o u s .
O b s e r v e l o c a l r e g u l a t i o n s i f y o u w i s h t o f e l l a t r e e .
► Fig.29: 1. F e l l i n g a r e a
— B e f o r e s t a r t i n g f e l l i n g w o r k , e n s u r e t h a t :
• O n l y p e r s o n s i n v o l v e d i n t h e f e l l i n g o p e r a t i o n
a r e i n t h e v i c i n i t y ;
• A n y p e r s o n i n v o l v e d h a s a n u n h i n d e r e d p a t h
o f r e t r e a t t h r o u g h a r a n g e o f a p p r o x i m a t e l y
45° e i t h e r s i d e o f t h e f e l l i n g a x i s . C o n s i d e r t h e
a d d i t i o n a l r i s k o f t r i p p i n g o v e r e l e c t r i c a l c a b l e s ;
• T h e b a s e o f t h e t r u n k i s f r e e o f f o r e i g n
objects, roots and ranches;
• No persons or objects are present over a
d i s t a n c e o f 2 1 / 2 t r e e l e n g t h s i n t h e d i r e c t i o n
i n w h i c h t h e t r e e w i l l f a l l .
— C o n s i d e r t h e f o l l o w i n g w i t h r e s p e c t t o e a c h t r e e :
• D i r e c t i o n o f l e a n ;
• L o o s e o r d r y b r a n c h e s ;
• H e i g h t o f t h e t r e e ;
• N a t u r a l o v e r h a n g ;
• W h e t h e r o r n o t t h e t r e e i s r o t t e n .
— C o n s i d e r t h e w i n d s p e e d a n d d i r e c t i o n . D o n o t
c a r r y o u t f e l l i n g w o r k i f t h e w i n d i s g u s t i n g s t r o n g l y .
— T r i m m i n g o f r o o t s w e l l i n g s : B e g i n w i t h t h e l a r g e s t s w e l l -
ings. Make the vertical cut first, then the horizontal cut.
— S t a n d t o t h e s i d e o f t h e f a l l i n g t r e e . K e e p a n a r e a
c l e a r t o t h e r e a r o f t h e f a l l i n g t r e e u p t o a n a n g l e o f
45 ° e i t h e r s i d e o f t h e t r e e a x i s ( r e f e r t o t h e " f e l l i n g
area" figure). Pay attention to falling branches.
— A n e s c a p e p a t h s h o u l d b e p l a n n e d a n d c l e a r e d
a s n e c e s s a r y b e f o r e c u t s a r e s t a r t e d . T h e e s c a p e
p a t h s h o u l d e x t e n d b a c k a n d d i a g o n a l l y t o t h e r e a r
of the expected line of fall as illustrated in figure.
► Fig.30: 1. F e l l i n g d i r e c t i o n 2. D a n g e r z o n e
3. E s c a p e r o u t e
b e l o w .