English

APPLICATIONS

Breaking concrete, chipping off concrete, grooving, bar cutting, and driving piles.

Application examples:

Installation of piping and wiring, sanitary facility installation, machinery installation, water supply and drainage work, interior jobs, harbor facilities and other civil engineering work.

PRIOR TO OPERATION

1.Power source

Ensure that the power source to be utilized conforms to the power requirements specified on the product nameplate.

2.Power switch

Ensure that the power switch is in the OFF position. If the plug is connected to a receptacle while the power switch is in the ON position, the power tool will start operating immediately, which could cause a serious accident.

3.Extension cord

When the work area is removed from the power source, use an extension cord of sufficient thickness and rated capacity. The extension cord should be kept as short as practicable.

4.Installing Tools

CAUTION:

Be sure to switch power OFF and disconnect the plug from the receptacle to avoid serious trouble.

NOTE:

When using tools such as bull points, cutters, etc., make sure to use the genuine parts designated by our company.

(1)Clean the shank portion of the tool.

(2)As shown in Fig. 1, pull grip (A) in the direction of A , and insert the tool into a hole of the front cap.

(3)Adjust the groove position while turning the tool, and furthermore insert it until it hits the end of the hole.

(4)Return grip (A) to its original position, pull the tool

and make sure it is locked completely. (Fig. 2)

5.Deciding Working Position of Tool

The tool can be turned every 30 degrees and can be fixed at the position of 12 steps.

(1)As shown in Fig. 3, if the grip (B) is turned in the direction of B in a state where the grip (B) is pushed in the direction of A , the blade angle can be changed freely to any desired position.

(2)Release grip (B) and turn the tool, and make sure that it is locked completely.

6.Removing Tool

As shown in Fig. 1, pull grip (A), and pull out the tool.

CAUTION:

Be sure to grip the handle and side handle during work. Do not hold by the grip (A) during work. If you pull it by mistake, the bull point could jump out.

7.RCD

The use of a residual current device with a rated residual current of 30mA or less at all times is recommended.

HOW TO USE THE DEMOLITION HAMMER (Fig. 4)

1.After placing the tip of the tool on concrete surface, switch ON.

2.By utilizing the weight of the machine and by firmly holding the hammer with both hands, one can

effectively control the subsequent recoil motion. Proceed at a moderate work-rate, the use of too much force will impair efficiency.

CAUTION:

After long time of use, the cylinder case becomes hot. Therefore, be careful not to burn your hands.

GREASE REPLACEMENT

This machine is of full air-tight construction to protect against dust and to prevent lubricant leakage. This machine can be used without grease supplement for an extended period of time. However, perform the grease replacement to maintain the service life. Replace the grease as described below.

1.Grease Replacement Period

You should look at the grease when you change the carbon brush. (See item 4 in the section MAINTENANCE AND INSPECTION.) Ask for grease replacement at the nearest authorized Hitachi Service Center.

In the case that you are forced to change the grease by yourself, please follow the following points.

2.How to replace grease

CAUTION:

Before replacing the grease, turn the power off and pull out the plug from the receptacle.

(1)Remove the crank cover and wipe off the old grease inside. (Fig. 5)

(2)Supply 35g (the standard volume to cover the connecting rod) of Hitachi Electric Hammer Grease A to the crank case.

(3)After replacing the grease, install the crank cover securely.

NOTE:

The Hitachi Electric Hammer Grease A is of the low viscosity type. When the grease is consumed, purchase from an authorized Hitachi Service Center.

MAINTENANCE AND INSPECTION

1.Inspecting the tool

Since use of a dull tool will degrade efficiency and cause possible motor malfunction, sharpen or replace the tool as soon as abrasion is noted.

2.Inspecting the mounting screws

Regularly inspect all mounting screws and ensure that they are properly tightened. Should any of the screws be loose, retighten them immediately. Failure to do so could result in serious hazard.

3.Maintenance of the motor

The motor unit winding is the very “heart” of the power tool. Exercise due care to ensure the winding does not become damaged and/or wet with oil or water.

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