Sharpening The Saw Chain; Maintenance - Makita DUC305 Instruction Manual

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.
WARNING:
Do not cut right through the fibers 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.
2
► 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.

Sharpening the saw chain

Sharpen the saw chain when:
• Mealy sawdust is produced when damp wood is cut;
• The chain penetrates the wood with difficulty, even
when heavy pressure is applied;
• The cutting edge is obviously damaged;
• The saw pulls to the left or right in the wood.
(caused by uneven sharpening of the saw chain or
damage to one side only)
Sharpen the saw chain frequently but a little each time. Two
or three strokes with a file are usually sufficient for routine
resharpening. When the saw chain has been resharpened sev-
eral times, have it sharpened in our authorized service center.
Sharpening criteria:
WARNING:
the cutting edge and depth gauge increases the
risk of kickback.
1
► 1 . Cutter length 2. Distance between cutting edge
and depth gauge 3. Minimum cutter length (3 mm)
— All cutter length must be equal. Different cutter
lengths prevent the saw chain from running
smoothly and may cause the saw chain to break.
— Do not sharpen the chain when the cutter length
has reached 3 mm or shorter. The chain must be
replaced with new one.
— The chip thickness is determined by the distance
between the depth gauge (round nose) and the
cutting edge.
— The best cutting results are obtained with following
distance between cutting edge and depth gauge.
• Chain blade 90PX : 0.65 mm (0.025")
• Chain blade 91PX : 0.65 mm (0.025")
15 ENGLISH
An excessive distance between
2
1
1
3
1
30
55
2
30
55