Hitachi DH 40FA - Manual (Page 8)

7
English
2. Power switch
Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.
3. Extension cord
When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.
4. How to install dust cover (Fig. 1)
Always install the dust cover on the drill bit or the
taper shank adapter.
Insert the dust cover until it lies flush in the groove.
NOTE
For a thick drill bit, insert the dust cover from drill
rear.
5. How to install tool
NOTE
For tools such as a bull point and a cold chisel,
use only Hitachi genuine parts.
(1) Clean, then smear the tool shank with the grease
provided in the green tube (Fig. 2).
(2) Pull the tool holder in the direction of arrow A and
rotate it in the direction of arrow B
(counterclockwise). Fully insert the tool shank into
the hexagonal hole of the front cover. (Fig. 3)
(3) Return the tool holder to fix the tool.
NOTE
Remove in the reverse order to installation.
HOW TO USE THE ROTARY HAMMER
1. How to drill holes (Fig. 4)
(1) Pull the switch trigger after applying the drill bit
tip to the drilling position.
(2) It is unnecessary to forcibly press the rotary hammer
main body. It is sufficient to slightly press the rotary
hammer to an extent that shavings are freely
discharged.
CAUTION
Although this machine is equipped with a safety
clutch, if the drill bit becomes bound in concrete
or other material, the resultant stoppage of the drill
bit could cause the machine body to turn in reaction.
Ensure that the main handle and side handle are
gripped firmly during operation.
2. How to chip or crush (Fig. 5)
By applying the tool tip to the chipping or crushing
position, operate the rotary hammer by utilizing its
empty weight.
Forcible pressing or thrusting is unnecessary.
3. How to select rotation-hammering and hammering.
(1) Rotation-hammering (Fig. 6)
Rotate the selector lever clockwise so that the ▲
mark on the selector lever is aligned with the ▲
mark on the side of the
mark on the under
cover.
(2) Hammering (Fig. 7)
Rotate the selector lever counterclockwise so that
the ▲ mark on the selector lever is aligned with
the ▲ mark on the side of the
mark on the
under cover.
CAUTION
Turning the selector lever during motor rotation will
rotate the tool accidentally. The selector lever should
only be turned when the motor is stopped.
4. Install the stopper (Fig. 8)
(1) Loosen the side handle and insert the straight portion
of the stopper into the handle bolt hole.
(2) Move the stopper to the specified position and
rotate the grip of the side handle clockwise to fix
the stopper.
5. Warming up (Fig. 9)
The grease lubrication system in this unit may
require warming up in cold regions.
Position the end of the bit so makes contact with
the concrete, turn on the switch and perform the
warming up operation. Make sure that a hitting
sound is produced and then use the unit.
CAUTION
When the warming up operation is performed, hold
the side handle and the main unit securely with
both hands to maintain a secure grip and be careful
not to twist your body by the jammed drill bit.
6. When a taper shank adapter is used. (Fig. 10)
(1) Install drill bit with taper shank in the taper shank
adapter.
(2) Turn the power on and drill a base hole to the depth
sounded by indicating groove on the drill bit.
(3) After cleaning out dust with a syringe, attach the
plug to the anchor tip and drive in the anchor with
a manual hammer.
(4) To remove the drill bit (taper shank), insert the
cotter into the slot of the taper shank adapter and
strike the head of the cotter with a manual hammer
supporting on a rest. (Fig. 11)
HOW TO HANDLE A CORE BIT
When a core bit is used, large diameter holes and
blind holes can be drilled. In this case, use optional
accessories for core bits (such as a center pin and
core bit shank) for more efficient operation.
1. Mounting
CAUTION
Prior to mounting a core bit, always disconnect the
plug from the receptacle.
(1) Mount the core bit on the core bit shank. (Fig. 12)
Before that, feed oil to the screw portion of core
bit shank for easy dismounting.
(2) Mount the core bit shank on the main body in the
same manner as in mounting the drill bit and the
bull point. (Fig. 13)
(3) Insert the center pin into the guide plate until it
reaches the extremity.
(4) Fit in the guide plate by aligning its concaved portion
with the core bit tip. When the position of the
concave is shifted by turning the guide plate right
or left, the guide plate never slips off even when
the drill is used in a downward direction.
(Fig. 14)
2. Drilling holes
(1) Insert the plug into a receptacle.
(2) A spring is built in the center pin. By straightly and
gently pressing it to the wall or floor surface, the
entire surface of the core bit tip attains contact to
start the hole drilling job. (Fig. 15)