Bedienungsanleitung Hitachi g 13 sr2 (Seite 20 von 25) (Englisch, Dänisch, Schwedisch, Norwegisch, Finnisch)

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3. To prevent a new depressed center wheel from

digging into the workpiece, initial grinding should

be performed by drawing the grinder across the

workpiece toward the operator (Fig. 1 direction B).

Once the leading edge of the depressed center

wheel is properly abraded, grinding may be

conducted in either direction.

4. Precautions immediately after finishing operation

The wheel continues to rotate after the tool is

switched off.

After switching off the machine, do not put it down

until the depressed center wheel has come to a

complete stop. Apart from avoiding serious

accidents, this precaution will reduce the amount

of dust and swarf sucked into the machine.

CAUTION

⅜ Check that the work piece is properly supported.

⅜ Ensure that ventilation openings are kept clear when

working in dusty conditions.

If it should become neccessary to clear dust, first

disconnect the tool from the mains supply (use non-

metallic objects) and avoid damaging internal parts.

⅜ Ensure that sparks resulting from use do not create

a hazard e.g. do not hit persons, or ignite flammable

substances.

⅜ Always use protective safety glasses and hearing

protectors, use other personal protective equipment

such as gloves, apron and helmet when necessary.

⅜ Always use eye and ear protection.

Other personal protective equipment such as dust

mask, gloves, helmet and apron should be worn

when necessary.

If in doubt, wear the protective equipment.

⅜ When the machine is not in use, the power source

should be disconnected.

ASSEMBLING AND DISASSEMBLING THE

DEPRESSED CENTER WHEEL (Fig. 2)

CAUTION: Be sure to switch OFF and disconnect the

attachment plug from the receptacle to avoid

a serious accident.

1. Assembling (Fig. 2)

(1) Turn the disc grinder upsidedown so that the spindle

is facing upward.

(2) Align the across flats of the wheel washer with the

notched part of the spindle, then attach them.

(3) Fit the protuberance of the depressed center wheel

onto the wheel washer.

(4) Screw the wheel nut onto the spindle.

(5) While pushing the push button with one hand, lock

the spindle by turning the depressed center wheel

slowly with the other hand.

Tighten the wheel nut by using the supplied wrench

as shown in Fig. 2.

2. Disassembling

Follow the above procedures in reverse.

CAUTIONS:

⅜ Comfirm that the depressed center wheel is mounted

firmly.

⅜ Confirm that the push button is disengaged by

pushing push button two or three times before

switching the power tool on.

MAINTENANCE AND INSPECTION

1. Inspecting the depressed center wheel

Ensure that the depressed center wheel is free of

cracks and surface defects.

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. Inspecting the carbon brushes (Fig. 3)

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 it becomes

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

keep carbon brushes clean and ensue that they

slide freely within the brush holders.

4. Replacing carbon brushes:

Disassemble the brush caps with a slotted-head

screwdriver. The carbon brushes can then be easily

removed.

5. 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.

6. 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 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: 88 dB (A)

The typical A-weighted sound power level: 101 dB (A)

Wear ear protection.

The typical weighted root mean square acceleration

value does not exceed 2.5 m/s

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