Handleiding Hitachi WR9DM1 (pagina 15 van 98) (Nederlands, Duits, Engels, Frans, Italiaans, Portugees, Spaans)

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Fig. 20

MAINTENANCE AND INSPECTION

1. Inspecting the socket

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.

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 may 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. 12)

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. 14.

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. 15. 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 of the outside

When the impact wrench 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.

7. Storage

Store the impact wrench in a place in which the

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

children.

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: 97 dB (A)

The typical A-weighted sound power level: 110 dB (A)

Wear ear protection.

The typical weighted root mean square acceleration

value: 12 m/s

kgf•cm

1600

1200

800

400

20 40

80 100 120 140 160

N•m

160

120

Tightening torque

Number of tightenings (PCS)/charging

When full recharged

When completely discharged

M14 × 50 High tension bolt

(tighening time 3 sec)

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