Maintenance - Makita HR1840 Instruction Manual

NOTE: Eccentricity in the drill bit rotation may occur
while operating the tool with no load. The tool auto-
matically centers itself during operation. This does not
affect the drilling precision.
Drilling in wood or metal
Hold the tool irmly and exert care
CAUTION:
when the drill bit begins to break through the
workpiece. There is a tremendous force exerted on
the tool/drill bit at the time of hole break through.
CAUTION:
A stuck drill bit can be removed
simply by setting the reversing switch to reverse
rotation in order to back out. However, the tool
may back out abruptly if you do not hold it irmly.
CAUTION:
Always secure workpieces in a
vise or similar hold-down device.
NOTICE:
Never use "rotation with hammering"
when the drill chuck is installed on the tool. The
drill chuck may be damaged.
Also, the drill chuck will come off when reversing the
tool.
NOTICE:
Pressing excessively on the tool will
not speed up the drilling. In fact, this excessive
pressure will only serve to damage the tip of your drill
bit, decrease the tool performance and shorten the
service life of the tool.
Set the action mode changing knob to the
Attach the chuck adapter to a keyless drill chuck to
which 1/2"-20 size screw can be installed, and then
install them to the tool. When installing it, refer to the
section "Installing or removing drill bit".
► 1 . Keyless drill chuck 2. Chuck adapter
Blow-out bulb
Optional accessory
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Using dust cup set
Optional accessory
Fit the dust cup set against the ceiling when operating
the tool.
symbol.
1
2
NOTICE:
in metal or similar. It may damage the dust cup set due
to the heat produced by small metal dust or similar.
NOTICE:
set with the drill bit installed in the tool. It may
damage the dust cup set and cause dust leak.

MAINTENANCE

CAUTION:
switched off and the battery cartridge is removed before
attempting to perform inspection or maintenance.
NOTICE:
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.
10 ENGLISH
Do not use the dust cup set when drilling
Do not install or remove the dust cup
Always be sure that the tool is
Never use gasoline, benzine, thinner,