Carrying Tool; Maintenance - Makita UC100DWA Instruction Manual

Working with the tool
CAUTION:
Keep all parts of the body away
from the saw chain when the tool is operating.
CAUTION:
Hold the tool firmly with both
hands when the tool is operating.
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.
Before starting the tool, bring the root of guide bar and
the support part of tool body in contact with the branch to
be cut as shown in the figure. While contacting the branch
with the tool and guide bar, start the tool and saw the
branch by moving the tool down along the branch.
► Fig.24
CAUTION:
Before the cutting operation, make
sure that the branch to be cut is in contact with
the root of guide bar and the support part of tool
body. Otherwise, the tool may be pulled toward the
tip of guide bar and the guide bar may wobble, and
may result in an injury.

Carrying tool

Before carrying the tool, always remove the battery
cartridge from the tool. Then attach the guide bar cover.
Also cover the battery cartridge with the battery cover.
► Fig.25: 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 attempt-
ing 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 several times, have it sharpened in our
authorized service center.
Sharpening criteria:
WARNING:
the cutting edge and depth gauge increases the
risk of kickback.
► Fig.26: 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 80TXL : 0.65 mm
► Fig.27
— The sharpening angle of 30° must be the same on
all cutters. Different cutter angles cause the chain
to run roughly and unevenly, accelerate wear, and
lead to chain breaks.
— Use a suitable round file so that the proper sharp-
ening angle is kept against the teeth.
• Chain blade 80TXL : 55°
File and file guiding
— Use a special round file (optional accessory) for
saw chains to sharpen the chain. Normal round
files are not suitable.
— Diameter of the round file for each saw chain is as
follows:
• Chain blade 80TXL : 4.0 mm
— The file should only engage the cutter on the forward
stroke. Lift the file off the cutter on the return stroke.
— Sharpen the shortest cutter first. Then the length
of this shortest cutter becomes the standard for all
other cutters on the saw chain.
— Guide the file as shown in the figure.
► Fig.28: 1. File 2. Saw chain
— The file can be guided more easily if a file holder
(optional accessory) is employed. The file holder
has markings for the correct sharpening angle of
30° (align the markings parallel to the saw chain)
and limits the depth of penetration (to 4/5 of the
file diameter).
► Fig.29: 1. File holder
— After sharpening the chain, check the height of the
depth gauge using the chain gauge tool (optional
accessory).
► Fig.30
— Remove any projecting material, however small,
with a special flat file (optional accessory).
— Round off the front of the depth gauge again.
15 ENGLISH
An excessive distance between