Hitachi DV 18DV, DV 14DV Rotation to Hammer changeover, Tightening torque adjustment, English

English

Hammer mark Drill mark

White line

Fig. 10

CAUTION:

⬤The cap cannot be set between the numerals “1, 3, 5 ...

22” or the white dot.

⬤Do not use with the cap numeral at “22” and the white line at the middle of the drill mark. Doing so may cause damage. (See Fig. 10)

6.Rotation to Hammer changeover

The "Rotation (Rotation only)" and "Hammer (Hammer + Rotation)" can be switched by

aligning the drill mark "" or the hammer mark "" with the triangle mark on the outer body.

◯To make holes in the metal, wood or plastic, switch to "Rotation (Rotation only)".

◯To make holes in the bricks or concrete blocks, switch to "Hammer (Hammer + Rotation)".

CAUTION:

Do not use the hammer drill in the "Hammer" setting if the material can be bored by rotation only. Such action will not only reduce drill efficiency, but may also damage the drill tip.

7.Tightening torque adjustment

(1) Tightening torque

Tightening torque should correspond in its intensity to the screw diameter. When too strong power 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 (See Fig. 9)

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 dot. The tightening torque at position “1” is the weakest and the torque is strongest at the highest number.

(3) Adjusting the tightening torque (See Fig. 9)

Rotate the cap and line up the numbers “1, 3, 5, ... 22” on the cap, or the white dot, 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.

CAUTION:

⬤The motor rotation may be locked to cease while the unit is used as drill. While operating the hammer drill, take care not to lock the motor.

⬤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).

⬤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.

⬤Too long hammering may cause the screw broken due to excessive tightening.

⬤A buzzing noise is produced when the motor is about to rotate; This is only a noise, not a machine failure.

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