Hitachi H 45M R, Handling Instructions Manual

5

English

HOW TO USE THE DEM OLITION HAM M ER
(Fig. 4)

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

sw itch ON.

2. By utilizing the w eight of the m achine and by firm ly

holding the ham m er w ith both hands, one can
effectively control the subsequent recoil m otion.
Proceed at a m oderate w ork-rate, the use of too
m uch force w ill im pair efficiency.

CAUTION

After long tim e of use, the cylinder case becom es
hot. Therefore, be careful not to burn your hands.

GREASE REPLACEM ENT

This m achine is of full air-tight construction to protect
against dust and to prevent lubricant leakage. This
m achine can be used w ithout grease supplem ent for an
extended period of tim e.  How ever, perform  the grease
replacem ent to m aintain the service life. Replace the
grease as described below .
1. Grease Replacement Period

You should look at the grease w hen you change
the carbon brush. (See item  4 in the section
M AINTENANCE AND INSPECTION.) Ask for grease
replacem ent at the nearest authorized Hitachi Service
Center.
In the case that you are forced to change the grease
by yourself, please follow  the follow ing points.

2. How  to replace grease
CAUTION:

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

(1) Rem ove the crank cover and w ipe off the old grease

inside. (Fig. 5)

(2) Supply 40 g (the standard volum e to cover the

connecting rod) of Hitachi Electric Ham m er Grease
A to the crank case.

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

securely.

NOTE:

The Hitachi Electric Ham m er Grease A is of the low
viscosity type. When the grease is consum ed,
p u r ch ase f r o m  an  au t h o r i zed  Hi t ach i  Ser v i ce
Center.

M AINTENANCE AND INSPECTION

1. Inspecting the tool

Since use of a dull tool w ill degrade efficiency and
cause possible m otor m alfunction, sharpen or
replace the tool as soon as abrasion is noted.

2. Inspecting the mounting screw s

Regularly inspect all m ounting screw s and ensure
that they are properly tightened. Should any of the
screw s be loose, retighten them  im m ediately. Failure
to do so could result in serious hazard.

3. M aintenance of the motor

The m otor unit w inding is the very “ heart”  of the
pow er tool. Exercise due care to ensure the w inding
does not becom e dam aged and/or w et w ith oil or
w ater.

APPLICATIONS

Breaking concrete, chipping off concrete, grooving, bar
cutting, and driving piles.
Application exam ples:
Instal l ati on of pi pi ng and w i r i ng, sani tar y  faci l i ty
installation, m achinery installation, w ater supply and
drainage w ork, interior jobs, harbor facilities and other
civil engineering w ork.

PRIOR TO OPERATION

1. Pow er source

Ensure that the pow er source to be utilized conform s
to the pow er requirem ents specified on the product
nam eplate.

2. Pow er sw itch

Ensure that the pow er sw itch is in the OFF position.
If the plug is connected to a receptacle w hile the
pow er sw itch is in the ON position, the pow er tool
w ill start operating im m ediately, w hich could cause
a serious accident.

3. Extension cord

When the w ork area is rem oved from  the pow er
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 sw itch pow er OFF and disconnect the
plug from  the receptacle to avoid serious trouble.

NOTE:

When using tools such as bull points, cutters, etc.,
m ake sure to use the genuine parts designated by
our com pany.

(1) Clean the shank portion of the tool.
(2) As show n in Fig. 1, pull grip (A) in the direction

of 

✁

, and insert the tool into a hole of the front

cap.

(3) Adjust the groove position w hile turning the tool,

and furtherm ore insert it until it hits the end of the
hole.

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

and m ake sure it is locked com pletely. (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 show n in Fig. 3, if the grip (A) is turned in the

direction of 

✂

 in a state w here the grip (B) is

pushed in the direction of 

✁

, the blade angle can

be changed freely to any desired position.

(2) Release grip (B) and turn the tool, and m ake sure

that it is locked com pletely.

6. Removing Tool

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

CAUTION

Be sure to grip the handle and side handle or grip
(C) portion during w ork. Do not hold by the grip
(A) during w ork. If you pull it by m istake, the bull
point could jum p out.