Manual Hitachi DS 12 DM (page 12 of 70) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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9. Confirm that the battery is mounted correctly.

10. Check the rotational direction

The bit rotates clockwise (viewed from the rear

side) by pushing the R-side of the selector button.

The L-side of the selector button is pushed to turn

the bit counterclockwise. (See Fig. 15). (The

and

marks are provided on the body.)

11. Switch operation

⅜ When the trigger switch is depressed, the tool

rotates. When the trigger is released, the tool stops.

⅜ The rotational speed of the drill can be controlled

by varying the amount that the trigger switch is

pulled. Speed is low when the trigger switch is

pulled slightly and increases as the trigger switch

is pulled more.

NOTE:

⅜ A buzzing noise is produced when the motor is

about to rotate; This is only a noise, not a machine

failure.

MAINTENANCE AND INSPECTION

1. Inspecting the tool

Since use of as 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.

4. Inspecting the carbon brushes (Fig. 16)

The motor employs carbon brushes which are

consumable parts. Since and excessively worn

carbon brush can result in motor trouble, replace

the carbon brush with new ones when it becomes

worn to or near the “wear limit”. In addition, always

keep carbon brushes clean and ensure that they

slide freely whthin the brush holders

NOTE:

When replacing the carbon brush with a new one,

be sure to use the Hitachi Carbon Brush Code No.

999054.

5. Replacing carbon brushes

Take out the carbon brush by first removing the

brush cap and then hooking the protrusion of the

carbon brush with a flat head screw driver, etc., as

shown in Fig. 18.

When installing the carbon brush, choose the

direction so that the nail of the carbon brush agrees

with the contact portion outside the brush tube.

Then push it in with a finger as illustrated in

Fig. 19. Lastly, install the brush cap.

CAUTION:

Be absolutely sure to insert the nail of the carbon

brush into the contact portion outside the brush

tube. (You can insert whichever one of the two nails

provided.)

Caution must be exercised since any error in this

operation can result in the deformed nail of the

carbon brush and may cause motor trouble at an

early stage.

6. Cleaning on the outside

When the driver drill is stained, wipe with a soft

dry cloth or a cloth moistened with soapy water.

Do not use chloric solvents, gasoline or paint thinner,

for they melt plastics.

7. Storage

Store the driver drill in a place in which the tempera

ture is less than 40°C and out of reach of children.

8. 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 a 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.

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 United Kingdom.

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Hitachi DS 12 DM Manual

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