Makita 4112HS Manuel D'instructions page 7

For tool with the lock on and lock-off switch
To prevent the switch trigger from accidentally pulled, a
lock lever is provided.
To start the tool, push in the lock lever (B direction) and
then pull the switch trigger (A direction). Release the
switch trigger to stop.
For continuous operation, push in the lock lever, (B direc-
tion) pull the switch trigger (A direction) and then push
the lock lever (B direction) further in.
To stop the tool from the locked position, pull the switch
trigger (A direction) fully, then release it.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Installing or removing the wheel (Fig. 4 & 5)
To remove the wheel, depress the shaft lock to hold the
shaft stationary, then loosen the hex bolt clockwise with
the socket wrench.
To install a wheel, place flange with its partly elevated
side facing the tool, and then place ring before installing
a wheel onto the spindle (shaft) and another flange with
partly elevated side facing outward.
Be sure to fully tighten the hex bolt counterclockwise
after mounting the new wheel, or operation will be dan-
gerous.
CAUTION:
• Use only the Makita wrench to install or remove the
wheel.
OPERATION
CAUTION:
Be sure to pull the tool when cutting a workpiece.
• Use this tool for straight line cutting only. Cutting curves
can cause stress cracks or fragmentation of the dia-
mond wheel and abrasive cut-off wheel resulting in
possible injury to persons in the vicinity.
• After operation, always switch off the tool and wait until
the wheel has come to a complete stop before putting
the tool down.
• When cutting concrete blocks, tiles or masonry materi-
als, do not make a cut in depth more than 60 mm.
When you need to cut a workpiece over 60 mm up to
100 mm, make more than two passes of cuts. The
depth of the most efficient cut is about 40 mm.
Hold the tool firmly with both hands. First keep the wheel
without making any contact with a workpiece to be cut.
Then turn the tool on and wait until the wheel attains full
speed.
The cut is made by pulling the tool toward you (not by
pushing away from you). Align the notch on the base with
your cutting line when performing a cut.
Switch off the tool in the position posed when finishing a
cut. Raise the tool after the wheel comes to a complete
stop. (Fig. 6)
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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.
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 con-
crete block and cut in it.
Replacing carbon brushes (Fig. 7 & 8)
When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically
shut off the motor. When this occurs, both carbon
brushes should be replaced. 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.
Pick up an end of the dust cover slightly with hands so
that brush holder cap appears.
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.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always
using Makita replacement parts.
ACCESSORIES
CAUTION:
• These accessories or attachments are 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. Only use accessory
or 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)
• Abrasive cut-off wheels
• Socket wrench 17
• Safety goggle
• Ring 20
• Elbow joint
Connecting to vacuum cleaner (Fig. 9)
When you wish to perform cleaner operation, connect a
vacuum cleaner to your tool. Connect a hose of vacuum
cleaner to the dust nozzle via an elbow joint (accessory).
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