Sharpening The Saw Chain - Makita DUC307 Betriebsanleitung

W h e n f e l l i n g t r e e s , f o l l o w t h e p r o c e d u r e s b e l o w :
1. C u t a s c a r f a s c l o s e t o t h e g r o u n d a s p o s s i b l e . F i r s t m a k e
t h e h o r i z o n t a l c u t t o a d e p t h o f 1 / 5 - 1 / 3 o f t h e t r u n k d i a m e t e r .
D o n o t m a k e t h e s c a r f t o o l a r g e . T h e n m a k e t h e d i a g o n a l c u t .
► Fig.31
NOTE: T h e s c a r f d e t e r m i n e s 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 , a n d g u i d e s i t . I t i s m a d e o n t h e s i d e
t o w a r d s w h i c h t h e t r e e i s t o f a l l .
2. M a k e t h e b a c k c u t a l i t t l e h i g h e r t h a n t h e b a s e c u t o f
t h e s c a r f . T h e b a c k c u t m u s t b e e x a c t l y h o r i z o n t a l . L e a v e
a p p r o x i m a t e l y 1 / 1 0 o f t h e t r u n k d i a m e t e r b e t w e e n t h e b a c k
cut and the scarf. The wood fibers in the uncut trunk por-
t i o n a c t a s a h i n g e . In s e r t w e d g e s i n t o t h e b a c k c u t i n t i m e .
► Fig.32
WARNING:
Do not cut right through the fibers under
any circumstances. T h e t r e e w i l l o t h e r w i s e f a l l u n c h e c k e d .
NOTICE:
Only plastic or aluminum wedges may
be used to keep the back cut open. The use of
iron wedges is prohibited.
Carrying tool
B e f o r e c a r r y i n g t h e t o o l , a l w a y s a p p l y t h e c h a i n b r a k e a n d
r e m o v e t h e b a t t e r y c a r t r i d g e f r o m t h e t o o l . T h e n a t t a c h t h e g u i d e
b a r c o v e r . A l s o c o v e r t h e b a t t e r y c a r t r i d g e w i t h t h e b a t t e r y c o v e r .
► Fig.33: 1. G u i d e b a r c o v e r 2. B a t t e r y c o v e r
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.
T o m a i n t a i n p r o d u c t S A F E T Y a n d R E L I A B I L I T Y ,
repairs, any other maintenance or adjustment should
b e p e r f o r m e d b y M a k i t a A u t h o r i z e d o r F a c t o r y S e r v i c e
C e n t e r s , a l w a y s u s i n g M a k i t a r e p l a c e m e n t p a r t s .

Sharpening the saw chain

Sharpen the saw chain when:
• M e a l y s a w d u s t i s p r o d u c e d w h e n d a m p w o o d i s c u t ;
• The chain penetrates the wood with difficulty, even
w h e n h e a v y p r e s s u r e i s a p p l i e d ;
• T h e c u t t i n g e d g e i s o b v i o u s l y d a m a g e d ;
• T h e s a w p u l l s t o t h e l e f t o r r i g h t i n t h e w o o d .
( c a u s e d b y u n e v e n s h a r p e n i n g o f t h e s a w c h a i n o r
d a m a g e t o o n e s i d e o n l y )
S h a r p e n t h e s a w c h a i n f r e q u e n t l y b u t a l i t t l e e a c h t i m e .
Two or three strokes with a file are usually sufficient for
r o u t i n e r e s h a r p e n i n g . W h e n t h e s a w c h a i n h a s b e e n
r e s h a r p e n e d s e v e r a l t i m e s , h a v e i t s h a r p e n e d i n o u r
a u t h o r i z e d s e r v i c e c e n t e r .
Sharpening criteria:
WARNING:
the cutting edge and depth gauge increases the
risk of kickback.
► Fig.34: 1. C u t t e r l e n g t h 2. D i s t a n c e b e t w e e n c u t t i n g
e d g e a n d d e p t h g a u g e 3. M i n i m u m
l e n g t h ( 3 m m )
— All cutter length must be equal. Different cutter
l e n g t h s p r e v e n t t h e s a w c h a i n f r o m
s m o o t h l y a n d m a y c a u s e t h e s a w c h a i n t o b r e a k .
— D o n o t s h a r p e n t h e c h a i n w h e n t h e c u t t e r l e n g t h
h a s r e a c h e d 3 m m
r e p l a c e d w i t h n e w o n e .
— T h e c h i p t h i c k n e s s i s d e t e r m i n e d b y t h e d i s t a n c e
b e t w e e n t h e d e p t h g a u g e ( r o u n d n o s e ) a n d t h e
c u t t i n g e d g e .
— T h e b e s t c u t t i n g r e s u l t s a r e o b t a i n e d w i t h f o l l o w i n g
d i s t a n c e b e t w e e n c u t t i n g e d g e a n d d e p t h g a u g e .
• C h a i n b l a d e 90 P X : 0. 6 5 m m
► Fig.35
— T h e s h a r p e n i n g a n g l e o f 3 0 ° m u s t b e t h e s a m e o n
all cutters. Different cutter angles cause the chain
t o r u n r o u g h l y a n d u n e v e n l y , a c c e l e r a t e w e a r , a n d
l e a d t o c h a i n b r e a k s .
— Use a suitable round file so that the proper sharp-
e n i n g a n g l e i s k e p t a g a i n s t t h e t e e t h .
• C h a i n b l a d e 90 P X : 55 °
File and file guiding
— Use a special round file (optional accessory) for
s a w c h a i n s t o s h a r p e n t h e c h a i n . N o r m a l r o u n d
files are not suitable.
— Diameter of the round file for each saw chain is as
f o l l o w s :
• C h a i n b l a d e 90 P X : 4.5 m m
— The file should only engage the cutter on the for-
ward stroke. Lift the file off the cutter on the return
s t r o k e .
— Sharpen the shortest cutter first. Then the length
o f t h i s s h o r t e s t c u t t e r b e c o m e s t h e s t a n d a r d f o r a l l
o t h e r c u t t e r s o n t h e s a w c h a i n .
— Guide the file as shown in the figure.
► Fig.36: 1. F i l e 2. S a w c h a i n
— The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder
h a s m a r k i n g s f o r t h e c o r r e c t s h a r p e n i n g a n g l e o f
3 0 ° ( a l i g n t h e m a r k i n g s p a r a l l e l t o t h e s a w c h a i n )
a n d l i m i t s t h e d e p t h o f p e n e t r a t i o n ( t o 4 / 5 o f t h e
file diameter).
► Fig.37: 1. F i l e h o l d e r
— A f t e r s h a r p e n i n g t h e c h a i n , c h e c k t h e h e i g h t o f t h e
d e p t h g a u g e u s i n g t h e c h a i n g a u g e t o o l ( o p t i o n a l
a c c e s s o r y ) .
► Fig.38
— Remove any projecting material, however small,
with a special flat file (optional accessory).
— Round off the front of the depth gauge again.
18 ENGLISH
An excessive distance between
r u n n i n g
o r s h o r t e r . T h e c h a i n m u s t b e
c u t t e r