Manual Hitachi H 45 MRY (page 7 of 40) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

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 27g (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.

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 (A) 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 or grip

(A) during work. If you pull it by mistake, the bull

point could jump out.

01Eng_H45MRY_WE 10/8/08, 15:486

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Hitachi H 45 MRY Manual

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