Manual Hitachi WH 12 DMR (page 19 of 130) (English)

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5. Inspecting the carbon brushes (Fig. 18)

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.

6. 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 slotted head screw driver, etc.,

as shown in Fig. 20.

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. 21. 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.

7 Cleaning of the outside

When the impact driver is stained, wipe with a soft

dry cloth or a cloth moistened with soapy water. Do

not use chloric solvents, gasoline or paint thinner, as

they melt plastics.

8. Storage

Store the impact driver in a place in which the

temperature is less than 40°C, and out of reach of

children.

9. 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.

NOTE:

Due to HITACHI’s continuing program of reserch 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.

Information concerning airborne noise and vibration

The measured values were determined according to

EN50144.

The typical A-weighted sound pressure level:

95 dB (A)(WH12DM2, WH12DMR)

95 dB (A)(WH9DM2)

96 dB (A)(WR12DM2)

96 dB (A)(WR9DM2)

The typical A-weighted sound power level:

108 dB (A)(WH12DM2, WH12DMR)

108 dB (A)(WH9DM2)

109 dB (A)(WR12DM2)

109 dB (A)(WR9DM2)

Wear ear protection.

The typical weighted root mean square acceleration

value: 10.8 m/s

(WH12DM2, WH12DMR)

9.7 m/s

(WH9DM2)

12.1 m/s

(WR12DM2)

10.9 m/s

(WR9DM2)

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Hitachi WH 12 DMR Manual

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