Hitachi DH 40FA, Instruction And Safety Manual

Page: 14 / 56

14
English
2. How to bore (Fig. 15)
(1) Connect the plug to the receptacle.
(2) A spring is installed in the center pin.
Push it lightly to the wall or the floor
straight. Connect all over the surface of
the core bit tip and start operating.
(3) When boring about 3/16" (5 mm) in
depth the position of the hole will
establish. Bore after that removing the
center pin and the guide plate from core
bit.
(4) Application of excessive force will not
only expedite the work, but will
deteriorate the tip edge of the drill bit,
resulting in reduced service life of the
rotary hammer.
CAUTION:
When removing the center pin and the
guide plate, turn OFF the switch and
disconnect the plug from the
receptacle.
3. Dismounting (Fig. 16)
Remove the core bit shank from the
rotary hammer and strike the head of
the core bit shank strongly two or three
times with a manual hammer holding
the core bit, then the thread becomes
loose and the core bit can be removed.
Fig. 14
Center Pin
Core Bit
Core Bit Tip
Guide Plate
Fig. 15
Core Bit
Shank
Fig. 16