Hitachi DH 25DL Handling Instructions Manual page 13

5. Hold the charger firmly and pull out the battery
NOTE
Be sure to pull out the battery from the charger
after use, and then keep it.
CAUTION
If the battery is charged while it is heated because
it has been left for a long time in a location subject
to direct sunlight or because the battery has just
been used, the pilot lamp of the charger lights up
green. In such a case, first let the battery cool, then
start charging.
When the pilot lamp flikers in red quickly (at 0.2-
second intervals), check for and take out any foreign
objects in the charger's battery installation hole. If
there are no foreign objects, it is probable that the
battery or charger is malfunctioning. Take it to your
Authorized Service Center.
Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC36YRL is taken out, wait for a minimum of
3 seconds before reinserting it to continue charging.
If the battery is reinserted within 3 seconds, the
battery may not be properly charged.
Regarding electric discharge in case of new batteries,
etc.
As the internal chemical substance of new batteries
and batteries that have not been used for an
extended period is not activated, the electric
discharge might be low when using them the first
and second time. This is a temporary phenomenon,
and normal time required for recharging will be
restored by recharging the batteries 2 – 3 times.
How to make the batteries perform longer
(1) Recharge the batteries before they become
completely exhausted.
When you feel that the power of the tool becomes
weaker, stop using the tool and recharge its battery.
If you continue to use the tool and exhaust the
electric current, the battery may be damaged and
its life will become shorter.
(2) Avoid recharging at high temperatures.
A rechargeable battery will be hot immediately after
use. If such a battery is recharged immediately after
use, its internal chemical substance will deteriorate,
and the battery life will be shortened. Leave the
battery and recharge it after it has cooled for a while.
PRIOR TO OPERATION
1. Mounting the drill bit (Fig. 4, 5)
CAUTION:
To prevent accidents, make sure to turn the switch
off.
NOTE:
When using tools such as drill bits, etc., make sure
to use the genuine parts designated by our company.
(1) Clean the shank portion of the drill bit.
(2) Insert the drill bit in a twisting manner into the tool
holder until it latches itself. (Fig. 4)
(3) Check the latching by pulling on the drill bit.
(4) To remove the drill bit, fully pull the grip in the
direction of the arrow and pull out the drill bit.
2. Confirm that the battery is mounted correctly.
3. Installation of dust cup or dust collector (B) (Optional
accessories) (Fig. 6, Fig. 7)
When using a rotary hammer for upward drilling
operations attach a dust cup or a dust collector (B)
to collect dust or particles for easy operation.
Installing the dust cup
Use the dust cup by attaching to the drill bit as shown
in Fig. 6.
When using a bit which has big diameter, enlarge
the center hole of the dust cup with this rotary hammer.
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. 7)
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
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).
4. 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.
5. Confirm the direction of bit rotation (Fig. 9)
The bit rotates clockwise (viewed from the rear side)
by pushing the R-side of the push button. (Fig. 9-a)
The L-side of the push button is pushed to turn the
bit counterclockwise. (Fig. 9-b)
6. Continuous drilling
The number of holes that can be drilled in concrete
after one recharge is shown in Table 4.
Table 4
Bit
Depth
dia.
(mm)
(mm)
DH25DL/DH25DAL DH36DL/DH36DAL
6.5
8.5
12.5
14.5 60
18
24
26
English
Possible continuous
drilling number (holes)
115 160
70 90
55 65
45 55
25 40
12 16
7 8
12