Maintenance - Makita DUC305 Instruction Manual

Carrying tool
Be f ore c arr y ing t h e tool, al w a y s appl y t h e c h ain brake
an d remo v e t h e batter y c artri d ges f rom t h e tool. T h en
atta c h t h e gui d e bar c o v er. A lso c o v er t h e batter y c ar-
tri d ge w it h t h e batter y c o v er.
Fig.29: 1. G ui d e bar c o v er 2. Batter y c o v er

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 maintain pro d u c t S A F E T Y an d R E L I A B I L I T Y ,
repairs, any other maintenance or adjustment should
be per f orme d b y Makita A ut h ori z e d or F a c tor y S er v i c e
C enters, al w a y s using Makita repla c ement parts.
Sharpening the saw chain
Sharpen the saw chain when:
• Mealy saw d ust is prod uc ed w h en d amp w ood is c ut;
The chain penetrates the wood with difficulty, even
w h en h ea v y pressure is applie d ;
• T h e c utting e d ge is ob v iousl y d amage d ;
• T h e sa w pulls to t h e le f t or rig h t in t h e w oo d .
( c ause d b y une v en s h arpening o f t h e sa w c h ain or
d amage to one si d e onl y )
S h arpen t h e sa w c h ain f re q uentl y but a little ea c h time.
Two or three strokes with a file are usually sufficient for
routine res h arpening. W h en t h e sa w c h ain h as been
res h arpene d se v eral times, h a v e it s h arpene d in our
aut h ori z e d ser v i c e c enter.
Sharpening criteria:
WARNING:
An excessive distance between
the cutting edge and depth gauge increases the
risk of kickback.
Fig.30: 1. C utter lengt h 2. D istan c e bet w een c utting
e d ge an d d ept h gauge 3. Minimum c utter
lengt h ( 3 mm )
— A ll c utter lengt h must be e q ual. D i f f erent c utter
lengt h s pre v ent t h e sa w c h ain f rom running
smoot h l y an d ma y c ause t h e sa w c h ain to break.
— D o not s h arpen t h e c h ain w h en t h e c utter lengt h
h as rea c h e d 3 mm or s h orter. T h e c h ain must be
repla c e d w it h ne w one.
— T h e c h ip t h i c kness is d etermine d b y t h e d istan c e bet w een
t h e d ept h gauge ( roun d nose ) an d t h e c utting e d ge.
— T h e best c utting results are obtaine d w it h f ollo w ing
d istan c e bet w een c utting e d ge an d d ept h gauge.
Chain blade 0P : 0.
Chain blade 1P : 0.
mm (0.02 )
mm (0.02 )
16 ENGLISH
Fig.31
— T h e s h arpening angle o f 30 ° must be t h e same on
all c utters. D i f f erent c utter angles c ause t h e c h ain
to run roug h l y an d une v enl y , a c c elerate w ear, an d
lea d to c h ain breaks.
Use a suitable round file so that the proper sharp-
ening angle is kept against t h e teet h .
• C h ain bla d e 9 0 P X : 5 5 °
• C h ain bla d e 9 1 P X : 5 5 °
File and le guiding
Use a special round file (optional accessory) for
sa w c h ains to s h arpen t h e c h ain. Normal roun d
files are not suitable.
Diameter of the round file for each saw chain is as
f ollo w s :
Chain blade 0P : 4. mm ( /1 )
Chain blade 1P : 4.0 mm ( / 2 )
The file should only engage the cutter on the for-
ward stroke. Lift the file off the cutter on the return
stroke.
Sharpen the shortest cutter first. Then the length
o f t h is s h ortest c utter be c omes t h e stan d ar d f or all
ot h er c utters on t h e sa w c h ain.
Guide the file as shown in the figure.
Fig.32: 1. F ile 2. S a w c h ain
—
The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder has
markings f or th e c orrec t sh arpening angle of 30° ( align
th e markings parallel to th e saw c h ain) and limits th e
depth of penetration (to 4/ of the file diameter).
Fig.33: 1. F ile h ol d er
— A f ter s h arpening t h e c h ain, c h e c k t h e h eig h t o f t h e
d ept h gauge using t h e c h ain gauge tool ( optional
a c c essor y ) .
Fig.34
Remove any projecting material, however small,
with a special flat file (optional accessory).
— R oun d o f f t h e f ront o f t h e d ept h gauge again.
Cleaning the guide bar
C h ips an d sa w d ust w ill buil d up in t h e gui d e bar groo v e.
They may clog the bar groove and impair the oil flow.
C lean out t h e c h ips an d sa w d ust e v er y time w h en y ou
s h arpen or repla c e t h e sa w c h ain.
Fig.35
Cleaning the sprocket cover
C h ips an d sa w d ust w ill a c c umulate insi d e o f t h e
spro c ket c o v er. R emo v e t h e spro c ket c o v er an d sa w
c h ain f rom t h e tool t h en c lean t h e c h ips an d sa w d ust.
Fig.36
Cleaning the oil discharge hole
S mall d ust or parti c les ma y be built up in t h e oil d is-
c h arge h ole d uring operation. T h ese d ust or parti c les
may impair the oil to flow and cause an insufficient
lubri c ation on t h e w h ole sa w c h ain. W h en a poor c h ain
oil d eli v er y o c c urs at t h e top o f gui d e bar, c lean t h e oil
d is c h arge h ole as f ollo w s.