English

￿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.

￿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.

Table 6

State of lamp Battery Remaining PowerThe 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.

As the remaining battery indicator shows somewhat differently depending on ambient temperature and battery characteristics, read it as a reference.

NOTE

￿Do not give a strong shock to the switch panel or break it.It may lead to a trouble.

￿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 CAUTIONS1.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.

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