Maintenance - Makita 8406c Betriebsanleitung

Hammer drilling (with a tungsten-carbide tipped bit)
When drilling in concrete, granite, tile, etc. with a tung-
sten-carbide tipped bit, first use "rotation only" action to
start a hole, then use "rotation with hammering" action to
continue drilling.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at
an idle, then remove from the hole. By repeating this
several times, the hole will be cleaned out.
Drilling (with a conventional drill bit)
When drilling in wood, metal or plastic materials, use
"rotation only" action.
1. Drilling in wood
When drilling in wood, best results are obtained with
wood drills equipped with a guide screw. The guide
screw makes drilling easier by pulling the bit into the
workpiece.
2. Drilling in metal
To prevent the bit from slipping when starting a hole,
make an indentation with a centerpunch and ham-
mer at the point to be drilled. Place the point of the
bit in the indentation and start drilling.
Use a cutting lubricant when drilling metals. The
exceptions are iron and brass which should be
drilled dry.
CAUTION:
• Pressing excessively on the tool will not speed up the
drilling. If fact, this excessive pressure will only serve
to damage the tip of your bit, decrease the tool perfor-
mance and shorten the service life of the tool.
• There is tremendous force exerted on the tool/bit at the
time of hole breakthrogh. Hold the tool firmly and exert
care when the bit begins to break through the work-
piece.
• Always secure small workpieces in a vise or similar
hold-down device.

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
Replacing carbon brushes (Fig. 22)
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. 23)
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized or Factory Service Centers
always using Makita replacement parts.
8
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 core bit (Dry type)
Diamond core bit
Center bit
Center bit shank
Diamond core bit (Wet type)
Diamond core bit
Sponge
Guide ring
Sheet