Operation; Maintenance; Replacing Carbon Brushes - Makita 4105KB Instruction Manual

is prolonged. Wait 20 - 30 seconds before pressing the
restart button to resume operation. Your finger should not
be on the switch trigger when you press the restart button,
however.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the tool.
Installing or removing diamond wheel
Fig.5
Loosen the thumb nut, lower the base and tighten the
thumb nut in that position. Fit the socket wrench onto the
hex bolt and turn the diamond wheel until two flatted
parallel surfaces of the outer flange reach the direction in
which the wrench can be inserted.
Fig.6
To install the wheel, follow the removal procedure in
reverse. Always install the wheel so that the arrow on the
wheel points in the same direction as the arrow on the
blade case.
BE SURE TO TIGHTEN THE HEX BOLT SECURELY.
Fig.7
CAUTION:
Use only the Makita wrench to install or remove the
•
wheel.
Dust bag
Fig.8
The use of the dust bag makes cutting operations clean
and dust collection easy. To attach the dust bag, fit it onto
the dust spout. When the dust bag is about one-third full,
remove the dust bag from the tool and pull the fastener
out. Empty the dust bag of its contents, tapping it lightly
so as to remove particles adhering to the insides which
might hamper collection.

OPERATION

Fig.9
Hold the tool firmly. Set the base plate on the workpiece
to be cut without the wheel making any contact. Then
turn the tool on and wait until the wheel attains full speed.
Move the tool forward over the workpiece surface,
keeping it flat and advancing smoothly until the cutting is
completed. Keep your cutting line straight and your
speed of advance uniform.
CAUTION:
Be sure to move the tool forward in a straight line
•
and gently. Forcing and exerting excessive
pressure or allowing the wheel to bend, pinch or
twist in the cut can cause overheating of the motor
and dangerous kickback of the tool.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Never use gasoline, benzine, thinner, alcohol or the
•
like. Discoloration, deformation or cracks may
result.
Dressing diamond wheel
If the cutting action of the diamond wheel begins to
diminish, use an old discarded coarse grit bench grinder
wheel or concrete block to dress the diamond wheel. To
do this, tightly secure the bench grinder wheel or
concrete block and cut in it.
After use
Blow away dust from the inside of the tool by running the
tool at an idle for a while. Brush off accumulation of dust
on the base. Accumulation of dust in the motor or on the
base may cause a malfunction of the tool.

Replacing carbon brushes

Fig.10
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
Fig.11
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.
ACCESSORIES
CAUTION:
These accessories
•
recommended for use with your Makita tool
specified in this manual. The use of any other
accessories or attachments might present a risk of
injury to persons.
attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
Diamond wheels (Dry type)
•
Hex wrench 5
•
Wrench 22
•
Rip fence (Guide rule)
•
Safety goggles
•
6
or attachments
Only use accessory or
are