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CAUTION

￿When the battery charger has been continuosly used, the battery charger will be heated, thus constituting the cause of the failures. Once the charging has been completed, give 15 minutes rest until the next charging.

￿If the battery is recharged when it is warm due to battery use or exposure to sunlight, the pilot lamp map light in green.

The battery will not be recharged. In such a case, let the battery cool before charging.

￿When the pilot lamp flickers in red (at 0.2-second intervals), check for and take out any foreign objects in the charger’s battery installation hole. If there are no foreign objects, it is probable that the battery or charger is malfunctioning. Take it to your authorized Service Center.

PRIOR TO OPERATION

1.Preparing and checking the work environment Make sure that the work site meets all the conditions laid forth in the precautions.

2.Checking the battery

Make sure that the battery is installed firmly. If it is at all loose it could come off and cause an accident.

3.Installing the bit (WH14DSDL / WH18DSDL)

Always follow the following procedure to install driver bit. (Fig. 5)

(1)Pull the guide sleeve away from front of the tool.

(2)Insert the bit into the hexagonal hole in the anvil.

(3)Release the guide sleeve and it returns to its original position.

CAUTION

If the guide sleeve does not return to its original position, then the bit is not installed properly.

4.Selecting the socket matched to the bolt (WR14DSDL / WR18DSDL)

Be sure to use a socket which is matched to the bolt to be tightened. Using an improper socket will not only result in insufficient tightening but also in damage to the socket or nut.

A worn or deformed hex. or square-holed socket will not give an adequate tightness for fitting to the nut or anvil, consequently resulting in loss of tightening torque.

Pay attention to wear of socket hole, and replace before further wear has developed.

5.Installing a socket (WR14DSDL / WR18DSDL)

￿Plunger type (Fig.6)

Align the plunger located in the square part of the anvil with the hole in the hex. socket. Then push the plunger, and mount the hex. socket on the anvil. Check that the plunger is fully engaged in the hole.

When removing the socket, reverse the sequence.

CAUTION

￿Please use the designated attachments which are listed in the operations manual and Hitachi’s catalog. Accidents or injuries could result from not doing so.

￿Make sure to firmly install the socket in the anvil. If the socket is not firmly installed it might come out and cause injuries.

HOW TO USE1.Check the rotational direction

The bit rotates clockwise (viewed from the rear side) by pushing the R-side of the push button.

The L-side of the push button is pushed to turn the bit

counterclockwise. (See Fig. 7) (The L and R marks are provided on the body.)

CAUTION

The push button cannot be switched while the impact driver is turning. To switch the push button, stop the impact driver, then set the push button.

2. Switch operation

￿When the trigger switch is depressed, the tool rotates. When the trigger is released, the tool stops.

￿The rotational speed can be controlled by varying the amount that the trigger switch is pulled. Speed is low when the trigger switch is pulled slightly and increases

as the trigger switch is pulled more.

NOTE

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

3.Change rotation speed

As shown in Fig. 8, when the rotation switch-over lever is slid to the lower side, the power mode (P) is set. And when slid to upper side, the save mode (S) is set.

Please use the save mode (S) when you want to lower Maximum tightening torque.

CAUTION

In the work of the save mode (S), avoid the continuous screw-tightening as temperature of electronic components of the converter switch increases.

4.Tightening and loosening screws (WH14DSDL / WH18DSDL)

Install the bit that matches the screw, line up the bit in

the grooves of the head of the screw, then tighten it. Push the impact driver just enough to keep the bit fitting the head of the screw.

CAUTION

Applying the impact driver for too long tightens the screw too much and can break it.

Tightening a screw with the impact driver at an angle to that screw can damage the head of the screw and the proper force will not be transmitted to the screw. Tighten with this impact driver lined up straight with the screw.

5.Tightening and loosening bolts

A hex. socket matching the bolt or nut must first be selected. Then mount the socket on the anvil, and grip the nut to be tightened with the hex. socket. Holding the wrench in line with the bolt, press the power switch to impact the nut for several seconds. If the nut is only loosely fitted to the bolt, the bolt may turn with the nut, therefore mistaking proper tightening. In this case, stop impact on the nut and hold the bolt head with a wrench before restarting impact, or manually tighten the bolt and nut to prevent them slipping.

6.Using the hook

The hook is used to hang up the power tool to your waist belt while working.

CAUTION

￿When using the hook, hang up the power tool firmly not to drop accidentally.

If the power tool is dropped, it may lead to an accident.

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