Bedienungsanleitung Hitachi w6vb2 (Seite 24 von 26) (Englisch, Dänisch, Schwedisch, Norwegisch, Finnisch)

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MAINTENANCE AND INSPECTION

1. Inspecting the hex-socket (or bit)

Since continued use of a worn hex-socket (bit) will

damage screw heads, replace the hexsocket (bit)

with a new one as soon as excessive wear is

noticed.

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.9)

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 having 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 (Fig.10)

Disassembly:

(1) Loosen the three screws, and remove the handle

cover.

(2) Lift the brush holder gently with a screwdriver or

the like, and remove it from the housing while

depressing the carbon brush. Be careful not to

excessively pull the lead wire.

(3) Remove the carbon brushes from the brush holders.

Assembly

(1) Insert the new carbon brushes into the brush holders.

(2) Insert the brush holders together with the carbon

brushes into the brush holder chambers in the

housing.

(3) Ensure that the lead wire and other parts are properly

positioned, and that there is no possibility of the

lead wire coming in contact with the armature or

other moving parts.

(4) Reinstall the handle cover while ensuring that the

internal wiring does not become pinched between

the handle cover and the housing, and secure the

handle cover with the three screws.

CAUTIONS

⅜ Be sure to follow the above assembly procedures

exactly. Should the internal wiring contact the

armature or become pinched between the handle

cover and housing, a serious risk of electric shock

to the operator would be created.

⅜ Do not tamper with parts other than those necessary

to effect carbon brush replacement.

NOTE

Due to HITACHI’s continuing program of research 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: 85 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration

value does not exceed 2.5 m/s

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