Manual Hitachi dv 12dv (page 28 of 34) (English, Danish, Swedish, Norwegian, Finnish)

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English

CAUTION

If the pilot lamp does not light up, pull out the

power cord from the receptacle and check the

battery mounting condition.

About 1 hour is required to fully charge the battery

at a temperature of about 20°C. The pilot lamp goes

off to indicate that the batterry is fully charged.

The battery charging time becomes longer when a

temperature is low or the voltage of the power

source is too low.

When the pilot lamp does not go off even if more

than two hours have elapsed after starting of the

charging, stop the charging and contact your

HITACHI AUTHORIZED SERVICE CENTER.

CAUTION

If the battery is heated due to direct sunlight, etc.,

just after operation, the charger pilot lamp may

not light up. At that time cool the battery first,

then start charging.

3. Disconnect the charger power cord from the

receptacle.

4. Hold the charger tight and pull out the battery.

PRIOR TO OPERATION

1. Setting up and checking the work environment

Check if the work environment is suitable by

following the precautions.

HOW TO USE

1. Confirm the cap position (see Fig. 4)

The three modes of screwdriver, drill and impact

drill can be switched by the position of the cap in

this unit.

(1) When using this unit as a screwdriver, line up the

one of the numbers “1, 3, 5 ... 22” on the cap, or

the white dots, with the triangle mark on the outer

body.

(2) When using this unit as a drill, align the cap drill

mark “

” with the triangle mark on the outer

body.

(3) When using this unit as an impact drill, align the

cap hammer mark “

” with the triangle mark on

the outer body.

CAUTIONS

⅜ The cap cannot be set between the numerals “1,

3, 5 ... 22” or the white dots.

⅜ Do not use with the cap numeral between “22” and

the white line at the middle of the drill mark. Doing

so may cause damage. (See Fig. 5)

2. Tightening torque adjustment

(1) Tightening torque

Tightening torque should correspond in its intensity

to the screw diameter. When too strong torque is

used, the screw head may be broken or be injured.

Be sure to adjust the cap position according to the

screw diameter.

(2) Tightening torque indication

The tightening torque differs depending on the type

of screw and the material being tightened.

The unit indicates the tightening torque with the

numbers “1, 3, 5 ... 22” on the cap, and a white

dots. The tightening toque at position “1” is the

weakest and the torque is strongest at the highest

number. (See Fig. 4)

(3) Adjusting the tightening torque

Rotate the cap and line up the numbers “1, 3, 5,

... 22” on the cap, or the white dots, with the

triangle mark on the outer body. Adjust the cap in

the weak or the strong torque direction according

to the torque you need.

CAUTIONS

⅜ The motor rotation may be locked to cease while

the unit is used as drill. While operating the impact

drill, take care not to lock the motor.

⅜ Too long hammering may cause the screw broken

due to excessive tightening.

3. Rotation to Impact changeover (See Fig. 4.).

The “Rotation (Rotation only)” and “Impact (Impact

+ Rotation)” can be switched by aligning the drill

mark “

” or the hammer mark “ ” with the

triangle mark on the outer body.

⅜ To make holes in the metal, wood or plastic, switch

to “Rotation (Rotation only)”.

⅜ To make holes in bricks or concrete blocks, switch

to “Impact (Impact + Rotation)”.

CAUTION

If an operation which is normally performed at the

“Rotation” setting is performed at “Impact “ setting,

the effect of making holes does not only increase

but it may also damage the bit or other parts.

4. Change rotation speed

Operate the shift knob to change the rotational

speed. Move the shift knob in the direction of the

arrow (see Figs. 6 and 7).

When the shift knob is set to “LOW”, the drill

rotates at a low speed. When set to “HIGH”, the

drill rotates at a high speed.

CAUTION

⅜ When changing the rotational speed with the shift

knob, confirm that the switch is off.

Changing the speed while the motor is rotating will

damage the gears.

⅜ When setting the shift knob to “HIGH” (high speed)

and the position of the cap is “17” or “22”, it may

happen that the clutch does not engaged and that

the motor is locked. In such a case, please set the

shift knob to “LOW” (low speed).

⅜ If the motor is locked, immediately turn the power

off. If the motor is locked for a while, the motor

or battery may be burnt.

5. The scope and suggestions for uses

The usable scope for various types of work based

on the mechanical structure of this unit is shown

in Table.1.

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Hitachi dv 12dv Manual

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