Manual Hitachi DC120VA (page 8 of 38) (English, German, Dutch, French, Italian, Spanish)

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English

MAINTENANCE AND INSPECTION

1. Inspecting the diamond core bit

Continued use of a dull or damaged diamond core bit

results in reduced drilling efficiency and may cause

overloading of the motor. Replace the diamond core

bit with a new one as soon as excessive 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. 3)

The motor employs carbon brushes which are

consumable parts. Since an excessively worn carbon

brush can result in motor trouble, replace the carbon

brushes with new ones which have the same carbon

brush No. shown in the figure when they become

worn to or near the “wear limit”. 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 the be easily

removed.

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 main lead are coloured in accordance

with the following code:

Blue: -Neutral

Brown: -Live

As the colours of the wires in the main 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.

Information concerning airborne noise and vibration

The measured values were determined according to

EN60745 and declared in accordance with ISO 4871.

Measured A-weighted sound pressure level: 84 dB (A)

Uncertainty KpA: 3 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration

value: 6.0 m/s

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Hitachi DC120VA Manual

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