Manual Hitachi WH18DSDL (page 13 of 84) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

⅜ When carrying the power tool with hooked to your

waist belt, do not fit any bit to the tip of power tool. If

the sharp bit such as drill is fitted to the power tool

when carrying it with hooked to your waist belt, you

will be injured.

⅜ Install securely the hook. Unless the hook is securely

installed, it may cause an injury while using.

(1) Removing the hook.

Remove the screws fixing the hook with Philips screw

driver. (Fig. 9)

(2) Replacing the hook and tightening the screws.

Install securely the hook in the groove of power tool

and tighten the screws to fix the hook firmly.

(Fig. 10)

7. About Remaining Battery Indicator

When pressing the remaining battery indicator switch,

the remaining battery indicator lamp lights and the

battery remaining power can be checked. (Fig.11)

When releasing your finger from the remaining

battery indicator switch, the remaining battery

indicator lamp goes off. The table 6 shows the state

of remaining battery indicator lamp and the battery

remaining power.

As the remaining battery indicator shows somewhat

differently depending on ambient temperature and

battery characteristics, read it as a reference.

NOTE

⅜ Do not give a strong shock to the switch panel or

break it.It may lead to a trouble.

⅜ To save the battery power consumption, the

remaining battery indicator lamp lights while pressing

the remaining battery indicator switch.

8. How to use the LED light

Every time you press the light switch on the switch

panel, the LED light lights or goes off. (Fig. 12)

To prevent the battery power consumption, turn off

the LED light frequently.

CAUTION

Do not expose directly your eye to the light by looking

into the light.

If your eye is continuously exposed to the light, your

eye will be hurt.

NOTE

To prevent the battery power consumption caused

by forgetting to turn off the LED light, the light goes

off automatically in about 15 minutes.

OPERATIONAL CAUTIONS

1. Resting the unit after continuous work

After use for continuous bolt-tightening work, rest

the unit for 15 minutes or so when replacing the

battery. The temperature of the motor, switch, etc.,

will rise if the work is started again immediately after

battery replacement, eventually resulting in burnout.

NOTE

Do not touch the protector, as it gets very hot during

continuous work.

2. Cautions on use of the speed control switch

This switch has a built-in, electronic circuit which

steplessly varies the rotation speed. Consequently, when

the switch trigger is pulled only slightly (low speed

rotation) and the motor is stopped while continuously

driving in screws, the components of the electronic

circuit parts may overheat and be damaged.

3. Use a tightening time suitable for the screw

The appropriate torque for a screw differs according to

the material and size of the screw, and the material

being screwed etc., so please use a tightening time

suitable for the screw. In particular, if a long tightening

time is used in the case of screws smaller than M8, there

is a danger of the screw breaking, so please confirm the

tightening time and the tightening torque beforehand.

4. Work at a tightening torque suitable for the bolt

under impact

The optimum tightening torque for nuts or bolts differs

with material and size of the nuts or bolts. An

excessively large tightening torque for a small bolt

may stretch or break the bolt. The tightening torque

increases in proportion to the operaton time. Use the

correct operating time for the bolt.

5. Holding the tool

Hold the impact wrench firmly with both hands. In

this case hold the wrench in line with the bolt.

It is not necessary to push the wrench very hard.

Hold the wrench with a force just sufficient to

counteract the impact force.

6. Confirm the tightening torque

The following factors contribute to a reduction of the

tightening torque. So confirm the actual tightening

torque needed by screwing up some bolts before the

job with a hand torque wrench. Factors affecting the

tightening torque are as follows.

(1) Voltage

When the discharge margin is reached, voltage

decreases and tightening torque is lowered.

(2) Operating time

The tightening torque increases when the operating

time increases. But the tightening torque does not

increase above a certain value even if the tool is

driven for a long time.

(3) Diameter of bolt

The tightening torque differs with the diameter of the

bolt. Generally a larger diameter bolt requires larger

tightening torque.

(4) Tightening conditions

The tightening torque differs according to the torque

ratio; class, and length of bolts even when bolts with

the same size threads are used. The tightening torque

also differs according to the condition of the surface

of workpiece through which the bolts are to be

tightened. When the bolt and nut turn together, torque

is greatly reduced.

Table 6

State of lamp Battery Remaining Power

The battery remaining power

is enough.

The battery remaining power

is a half.

The battery remaining power

is nearly empty.

Re-charge the battery soonest possible.

01Eng_WH14DSDL_WE 8/7/12, 1:18 PM12

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Hitachi WH18DSDL Manual

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