Operation - Makita HR166D Betriebsanleitung

Before installing the dust cup set, remove the bit from
the tool if installed.
1. Install the spacer so that the grooves on the
spacer fit in the protrusions on the tool barrel while wid-
ening it. Be careful for the spring not to come off from
the slit of spacer.
► Fig.15: 1. Spacer 2. Spring
► Fig.16
2. Install the side grip (optional grip base set and
the grip removed from standard side grip) so that the
groove on the grip fit in the protrusion on the spacer.
Turn the grip clockwise to secure it.
► Fig.17: 1. Side grip
3. Install the dust cup set so that the claws of the
dust cup fit in in the slits on the spacer.
► Fig.18: 1. Dust cup 2. Claws
NOTE: If you connect a vacuum cleaner to the dust
cup set, remove the dust cap before connecting it.
► Fig.19: 1. Dust cap
Removing the drill bit
To remove the drill bit, pull the chuck cover down all the
way and pull the drill bit out.
► Fig.20: 1. Bit 2. Chuck cover
Removing the dust cup set
To remove the dust cup set, follow the steps below.
1. Loosen the side grip.
► Fig.21: 1. Side grip
2. Hold the root of dust cup and pull it out.
► Fig.22: 1. Dust cup
NOTE: If it is difficult to remove the dust cup set,
remove the claws of the dust cup one by one by
swinging and pulling the root of the dust cup.
NOTE: If the cap comes off from the dust cup, attach
it with its printed side facing up so that groove on the
cap fits in the inside periphery of the attachment.
► Fig.23
Hook
Optional accessory
CAUTION:
Always remove the battery when
hanging the tool with the hook.
CAUTION:
Never hook the tool at high location
or on potentially unstable surface.
► Fig.24: 1. Groove 2. Hook 3. Screw
The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.

OPERATION

CAUTION:
Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip
and switch handle during operations.
CAUTION:
Always make sure that the work-
piece is secured before operation.
NOTE: If the battery cartridge is in low temperature,
the tool's capability may not be fully obtained. In this
case, warm up the battery cartridge by using the
tool with no load for a while to fully obtain the tool's
capability.
► Fig.25
Hammer drilling operation
CAUTION:
There is tremendous and sudden twisting
force exerted on the tool/drill bit at the time of hole break-
through, when the hole becomes clogged with chips and
particles, or when striking reinforcing rods embedded in the
concrete. Always use the side grip (auxiliary handle)
and firmly hold the tool by both side grip and switch
handle during operations. Failure to do so may result in
the loss of control of the tool and potentially severe injury.
Set the action mode changing knob to the
Position the drill bit at the desired location for the hole,
then pull the switch trigger. Do not force the tool. Light
pressure gives best results. Keep the tool in position
and prevent it from slipping away from the hole.
Do not apply more pressure when the hole becomes clogged with
chips or particles. Instead, run the tool at an idle, then remove the
drill bit partially from the hole. By repeating this several times, the
hole will be cleaned out and normal drilling may be resumed.
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
CAUTION:
Hold the tool firmly and exert care
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 firmly.
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.
10 ENGLISH
symbol.