Manual Hitachi DH 25 PB (page 13 of 80) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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2. How to bore (Fig. 16)

(1) Connect the plug to the power source.

(2) A spring is installed in the center pin.

Push it lightly to the wall or the floor perpendicularly.

Connect the core bit tip flush to the surface and

start operating.

(3) When boring about 5 mm in depth the position of

the hole will be established. Bore after that removing

the center pin and the guide plate from core bit.

(4) Application of excessive force will not only decelerate

the working efficiency, but it will deteriorate the tip

edge of the drill bit, resulting in reduced service

life of the rotary hammer.

CAUTION

When removing the center pin and the guide plate,

turn OFF the switch and disconnect the plug from

the receptacle.

3. Dismounting (Fig. 17)

Remove the core bit shank from the rotary hammer

and strike the head of the core bit shank strongly

two or three times with a manual hammer holding

the core bit, then the thread becomes loose and

the core bit can be removed.

LUBRICATION

Low viscosity grease is applied to this rotary hammer so

that it can be used for a long period without replacing

the grease. Please contact the nearest authorized service

center for grease replacement when any grease is leaking

from a loosened screw.

Further use of the rotary hammer with incorrect grease

will cause the machine inefficiency and reduce the service

life.

CAUTION:

A special grease is used with this machine, therefore, the

normal performance of the machine may be badly

affected by use of other grease. Please be sure to let one

of our authorized service center undertaking replacement

of the grease.

MAINTENANCE AND INSPECTION

1. Inspecting the drill bits

Since use of a dull tool will cause motor

malfunctioning and degraded efficiency, replace the

drill bit with new ones or resharpen them without

delay when 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.

4. Inspecting the carbon brushes (Fig. 18)

The motor employs carbon brushes which are

consumable parts. When they become worn to or

near “wear limit”, it could result in motor trouble.

When an auto-stop carbon brush is equipped, the

motor will stop automatically.

At that time, replace both carbon brushes with new

ones which have the same carbon brush numbers

shown in Fig. 18.

In addition, always keep carbon brushes clean and

ensure that they slide freely within the brush holders.

5. Replacing carbon brushes:

Disassemble the brush caps with a slotted-head

screwdriver. The carbon brushes can then be easily

removed.

6. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

CAUTION

Repair, modification and inspection of Hitachi Power

Tools must be carried out by an Hitachi Authorized

Service Center.

This Parts List will be helpful if presented with the

tool to the Hitachi Authorized Service Center when

requesting repair or other maintenance.

In the operation and maintenance of power tools,

the safety regulations and standards prescribed in

each country must be observed.

MODIFICATIONS

Hitachi Power Tools are constantly being improved

and modified to incorporate the latest technological

advancements.

Accordingly, some parts (i.e. code numbers and/or

design) may be changed without prior notice.

GUARANTEE

We guarantee Hitachi Power Tools in accordance with

statutory/country specific regulation. This guarantee does

not cover defects or damage due to misuse, abuse, or

normal wear and tear. In case of complaint, please send

the Power Tool, undismantled, with the GUARANTEE

CERTIFICATE found at the end of this Handling

instruction, to a Hitachi Authorized Service Center.

NOTE:

Due to HITACHI’s continuing program of research and

development, the specifications herein are subject to

change without prior notice.

IMPORTANT

Correct connection of the plug

The wires of the mains lead are coloured in accordance

with the following code:

Blue: -Neutral

Brown: -Live

As the colours of the wires in the mains lead of this tool

may not correspond with the coloured markings

identifying the terminals in your plug proceed as follows:

The wire coloured blue must be connected to the terminal

marked with the letter N or coloured black. The wire

coloured brown must be connected to the terminal

marked with the letter L or coloured red. Neither core

must be connected to the earth terminal.

NOTE:

This requirement is provided according to BRITISH

STANDARD 2769: 1984.

Therefore, the letter code and colour code may not be

applicable to other markets except The United Kingdom.

01Eng_DH25PA_WE 08/10/6, 16:3112

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Hitachi DH 25 PB Manual

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