6
English
numeral “2” denotes high speed.
PRACTICAL HANDLING PROCEDURES
1. Speed adjustment and switch operation
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The drill speed can be adjusted from 0 through full
speed by regulating the trigger-squeezing force.
The more the trigger is squeezed, the faster the drill
rotates. When the trigger is squeezed fully, the
speed is the maximum. (for D13VB2)
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Pulling the trigger switch and pushing the stopper,
keeps the switched-on condition which is conve-
nient for continuous running. When switching off,
the stopper can be disconnected by pulling the
trigger again.
2. Pressure
Drilling will NOT be accelerated by applying heavy
preasure on the drill. Such action will only result
in a damaged drill bit, decreased drilling
efficiency, and/or shortended service life of the drill.
3. Using a large diameter drill bit
The larger drill bit diameter, the larger reactive
force on your arms. Be careful not to lose control
of the drill because of this reactive force. To maintain
firm control, establish a secure foothold, hold the
drill tightly with both hands, and ensure that the
drill is perpendicular to the material being drilled.
4. When drilling completely through the material.
When the drill bit bores completely through the
material, careless handling often results in a broken
drill bit or damage to the drill body itself due to
the sudden movement of the drill. Always be alert
and ready to release pushing force when drilling
through the material.
5. Precaution on Boring
The drill bit may become overheated during opera-
tion; however, it is sufficiently operatable.
Do not cool the drill bit in water or oil.
6. Caution concerning immediately after use
Immediately after use, while it is still revolving, if
the Drill is placed on a location where considerable
ground chips and dust have accumulated, dust may
occasionally be absorbed into the motor. Always
pay attention to this undesirable possibility.
MAINTENANCE AND INSPECTION
1. Inspecting the drill bit
Continued use of a worn and/or damaged drill bit
will result in reduced drilling efficiency and may
seriously overload the drill motor. Inspect the drill
bit frequently and replace it as necessary.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure
that they are properly tightened. Should any of the
screws be loose, retighten them immediately. Fail-
ure to do so could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very “heart” of the
power tool. Exercise due care to ensure the winding
does not become damaged and/or wet with oil or
water.
4. Inspecting the carbon brushes (Fig. 8)
The motor employs carbon brushes which are con-
sumable parts. Since an excessively worn carbon
brush can result in motor trouble, replace the carbon
brushes with new ones having the same carbon
brush No. shown in the figure when they become
worn to or near the “wear limit”. In addition, always
keep carbon brushes clean and ensure that they
slide freely within the brush holders.
5. Replacing carbon brushes: (Fig. 9)
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Disassembling:
(1) Loosen the three screws on the handle cover, and
remove the handle cover.
(2) Lift out the brush holders together with the carbon
brushes, while being very careful not to forcibly pull
the lead wires within the brush holders.
(3) Withdraw the brush terminals, and remove the
carbon brushes from the brush holders.
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Reassembling:
(1) Place new carbon brushes into the brush holders,
and connect the brush terminals to the carbon
brushes.
(2) Return the brush holders and other parts to their
original positions, as illustrated in
Fig. 9
.
(3) Place the lead wires in the specified position.
Be very careful not to allow the lead wires to
contact the armature or rotating parts of the motor.
(4) Mount the handle cover, while being careful to
ensure it does not pinch the lead wires, and secure
it firmly with the three screws.
CAUTION
Should the lead wire be pinched by the handle
cover or come in contact with the armature or
rotating parts of the motor, a serious danger of
electric shock to the operator will be created. Exercise
extreme caution in disassembling and reassembling
the motor, follow the above procedure exactly.
DO NOT attempt to disassemble any parts other
than those necessary to effect replacement of the
carbon brushes.
NOTE
Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the mains lead are coloured in accordance
with the following code:
Blue:- Neutral
Brown:- Live
As the colours of the wires in the mains lead of this tool
may not correspond with the coloured markings identify-
ing the terminals in your plug proceed as follows:
The wire coloured blue must be connected to the terminal
marked with the letter N or coloured black.
The wire coloured brown must be connected to the
terminal marked with the letter L or coloured red.
Neither core must be connected to the earth terminal.
NOTE
This requirement is provided according to BRITISH
STANDARD 2769: 1984.
Therefore, the letter code and colour code may not be
applicable to other markets except United Kingdom.
