Manual Hitachi SV 12 SD (page 8 of 48) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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CAUTION

(1) After mounting the sanding paper, return the

clamping lever to its original position.

(2) The sanding paper must be precisely attached on the

pad, ensuring that there is ample tension (leaving no

slack). Loosely attached sanding paper could result

in unevenly sanded surfaces and/or damage to the

sanding paper itself.

5. Installing and removing the dust bag. (for models

SV12V and SV12SD)

(1) InstaIIation

As shown in Fig. 4, hold the dust gate and push in the

dust bag into the frame's dust bag holder.

(2) Removal

As shown in Fig. 5, push the dust gate's tab hard and

remove the dust bag from the frame.

PRACTICAL OPERATING PROCEDURES

CAUTION

Never apply water or grinding fluid when sanding.

This could result in electrical shock.

1. Switching the sander ON and OFF

By pulling the trigger and pushing the stopper, the

switch will remain ON even when the trigger is

released, promoting continuous, efficient operation.

By pulling the trigger again, the stopper is released

and the switch is turned OFF.

CAUTION

Never turn the power switch ON when the sander is

contacting the surface to be sanded. This is necessary

to preclude damage to the material. The same applies

when switching the power OFF.

2. How to hold the orbital sander

While gripping the knob with one hand and the handle

with the other, lightly press the sander against the

surface to be sanded so that the sanding paper

uniformly contacts the surface, as shown in Fig. 6.

DO NOT apply excessive pressure to the sander while

sanding. Excessive-pressure may cause overload of

the motor, reduced service life of the sanding paper,

and lowered sanding or polishing efficiency.

3. How to move the orbital sander

For optimum operating efficiency, alternately move

the sander forward and backward at a constant speed

and balance.

4. Changing the rotating Speed (model SV12V only)

SV12V has an electronic control system which can be

used to set the rotating speed between 4000 and

10000 revolutions per minute.

As shown in Fig. 7, dial position “1” is for minimum

speed and position “5” for maximum speed.

MOUNTING THE OPTIONAL ACCESSORIES

1. Mounting the magic pad.

Loosen the six screws.

Remove the pad and attach the magic pad.

CAUTION

Replace the pad only. Use the other parts without

removing them.

2. Mounting the cleaner adapter (for models SV12V

and SV12SD) (Fig. 8)

After mounting the dust collector hose onto the

cleaner adapter, mount the cleaner adapter onto the

unit in the same way as mounting the dust bag.

MAINTENANCE AND INSPECTION

1. Empting and cleaning the Dust Bag (for models

SV12V and SV12SD)

If the dust bag contains too much saw dust, dust

collection will be affected. Empty the dust bag when

it gets full.

Remove the dust bag, open the fastener, and dispose

of the contents.

2. Inspecting the sanding paper

Since use of worn-out sanding paper will degrade

efficiency and cause possible damage to the pad,

replace the sanding paper as soon as excessive

abrasion is noted.

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 could result in serious hazard.

4. Inspecting the carbon brushes (Fig. 10)

The motor employs carbon brushes which are

consumable parts. Since an excessively worn carbon

brush can result in motor trouble, replace the carbon

brush with a new one 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 ensure that they slide freely within

the brush holders.

5. Replacing carbon brushes

⅜ Disassembling

(1) Loosen the two screws on the top cover, and remove

the top cover. (Fig. 11)

(2) Lift out the brush holder together with the carbon

brush, while being very careful not to forcibly pull

the internal wires within the brush holder.

(3) Remove the carbon brush from the brush holder.

⅜ Reassembling

(1) Insert the brush terminal into the brush holder. Turn

the brush terminal 90˚.

(2) While maintaining this brush terminal position as

explained in (1), insert the new carbon brush into the

brush holder.

(3) While pressing the carbon brush against the outside

wall of the housing's bearing compartment, insert the

brush holder into the housing's original position.

(4) Place the internal wire in the specified position. Be

very careful not to allow the internal wire to contact

the armature or rotating parts of the motor. (Fig.12)

(5) Replace the top cover, while being careful to ensure

it does not pinch the internal wire, and secure it

firmly with the two screws.

CAUTION

Should the internal wire be pinched by the top cover

or come in contact with the armature or rotating

parts of the motor, a serious danger of electric shock

to the operator will be created. Exercise extreme

caution in disassembling and reassembling the motor,

following the above procedure exactly.

DO NOT attempt to disassemble any parts other than

those necessary to effect replacement of the carbon

brush.

6. 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.

01Eng_SV12V_WE 2/13/13, 9:047

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Hitachi SV 12 SD Manual

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