How To Use - HIKOKI DH 28PD Instrucciones De Manejo

○ Installing dust collector (B)
When using dust collector (B), insert dust collector (B)
from the tip of the bit by aligning it to the groove on the
grip. (Fig. 4)
CAUTION
○ The dust cup and dust collector (B) are for exclusive
use of concrete drilling work. Do not use them for wood
or metal drilling work.
○ Insert dust collector (B) completely into the chuck part
of the main unit.
○ When turning the rotary hammer on while dust collector
(B) is detached from a concrete surface, dust collector
(B) will rotate together with the drill bit. Make sure to turn
on the switch after pressing the dust cup on the concrete
surface. (When using dust collector (B) attached to a
drill bit that has more than 190 mm of overall length,
dust collector (B) cannot touch the concrete surface
and will rotate. Therefore please use dust collector (B)
by attaching to drill bits which have 166 mm, 160 mm,
and 110 mm overall length.)
○ Dump particles after every two or three holes when
drilling.
○ Please replace the drill bit after removing dust collector
(B).
6. Selecting the driver bit
Screw heads or bits will be damaged unless a bit
appropriate for the screw diameter is employed to drive
in the screws.
7. Confi rm the direction of bit rotation (Fig. 5)
The bit rotates clockwise (viewed from the rear side) by
pushing the R-side of the push button. The L-side of the
push button is pushed to turn the bit counterclockwise.
8. Selecting the function mode
You can switch functions to the 3 modes of "hammering
only", "rotation + hammering", and "rotation only" by
turning the change lever while pressing the push button.
Set the ▲ mark position of the change lever to that of the
mode to be used.
CAUTION
○ Before operating the change lever, check and make
sure that the motor has stopped.
A failure can occur if it is operated while the motor is
running.
○ To operate the change lever, press the push button,
and release the lock of the change lever. Also, check
and make sure after operation that the push button has
returned and that the change lever has been locked.
○ Switch the change lever without mistake. If it is used at
a position halfway, there is a fear that the service life of
the switching mechanism may be shortened.

HOW TO USE

CAUTION
To prevent accidents, make sure to turn the switch
off and disconnect the plug from the receptacle when
the drill pits and other various parts are installed or
removed. The power switch should also be turned off
during a work break and after work.
NOTE
Ensure that the wing bolt in the side handle is properly
tightened before using the tool.
1. Switch operation
The rotation speed of the drill bit can be controlled
steplessly by varying the amount that the trigger switch
is pulled. Speed is low when the trigger switch is pulled
slightly and increases as the switch is pulled more.
However, the switch trigger can only be pulled in
halfway during reverse and rotates at half the speed of
forward operation.
2. Rotation + hammering
This rotary hammer can be set to rotation and
hammering mode by pressing the push button and
turning the change lever to the
Turn the grip slightly and confi rm that the clutch has
been engaged with a click.
(1) Mount the drill bit.
(2) Pull the trigger switch after applying the drill bit tip to the
drilling position. (Fig. 7)
(3) Pushing the rotary hammer forcibly is not necessary
at all. Pushing slightly so that drill dust comes out
gradually is suffi cient.
CAUTION
When the drill bit touches construction iron bar, the bit
will stop immediately and the rotary hammer will react
to revolve. Therefore grip the side handle and handle
tightly as shown in Fig. 7.
3. Using the dust-collecting unit
Using the rotary hammer with the dust-collecting unit
attached creates a more hygienic working environment
free of fl ying dust (Fig. 8).
(1) Attaching the dust-collecting unit
Insert the dust-collecting unit along the rail on the rotary
hammer. When it is inserted as far as it will go, fi x it to
the rotary hammer with the two latches (Fig. 9).
CAUTION
The dust-collecting unit is designed for use when
drilling concrete. Do not use for drilling holes in metal or
wood.
(2) Adjusting the dust-collecting unit
(a) Adjusting the position of the dust-collecting nozzle
Push the nozzle in and adjust to the desired position.
Pull the adjuster on the nozzle in the direction of the
arrow to release the lock and move until it contacts
with the adjuster rod. Push the adjuster in the
opposite direction to the arrow to lock (Fig. 10).
(b) Setting the hole-drilling depth
Pull the adjuster on the handle in the direction of
the arrow to release the lock, move to the desired
position to determine the stroke, and push the
adjuster in the opposite direction to the arrow to
lock.
The nozzle travel distance when the tip of the nozzle
matches the tip of the drill bit is the hole-drilling
depth. (Fig. 11)
○ The maximum hole-drilling depth when using the dust-
collecting unit is 85 mm.
○ When using the dust-collecting unit, it is possible to use
HiKOKI drill bits between 4 mm and 18 mm in diameter
and up to 100 mm in eff ective length.
(3) Drilling holes
When drilling holes, hold the rotary hammer so that the
tip of the nozzle contacts with the concrete surface.
Dust-collecting eff ectiveness is reduced if the unit is
not in contact with the surface (Fig. 12).
(4) Removing dust
Excessive dust in the dust box will reduce dust-
collecting eff ectiveness. Empty the dust box regularly.
Push the lever to remove the dust box from the dust-
collecting unit, and empty and clean the box (Fig. 13).
Dust-collecting eff ectiveness is reduced if the fi lter in
the dust box becomes blocked.
Use the table below as a guide to replacement of the
dust box.
English
mark. (Fig. 6)
11