Manual Hitachi wh12dm2 (page 71 of 74) (English, Danish, Swedish, Norwegian, Finnish)

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English

MAINTENANCE AND INSPECTION

1. Inspecting the driver bit (WH12DM2, WH9DM2 )

Using a broken bit or one with a worn out tip is

dangerous because the bit can slip. Replace it.

2. Inspecting the socket (WR12DM2, WR9DM2)

A worn or deformed hex. or a square-holed socket

will not give an adequate tightness to the fitting

between the nut or anvil, consequently resulting in

loss of tightening torque. Pay attention to wear of a

socket holes periodically, and replace with a new one

if needed.

3. 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 may result in serious hazard.

4. 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.

5. Inspecting the carbon brushes (Fig. 19)

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. 21.

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. 22. 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 power tool 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 power tool in a place in which the

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

children.

9. Service parts list

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 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.

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, WH9DM2)

96 dB (A) (WR12DM2, WR9DM2)

The typical A-weighted sound power level:

108 dB (A) (WH12DM2, WH9DM2)

109 dB (A) (WR12DM2, WR9DM2)

Wear ear protection.

The typical weighted root mean square acceleration value:

10.8 m/s

(WH12DM2)

9.7 m/s

(WH9DM2)

12.1 m/s

(WR12DM2)

10.9 m/s

(WR9DM2)

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Hitachi wh12dm2 Manual

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