Manual Bosch gsr 12 2 (page 24 of 30) (English, German, Dutch, Danish, French, Italian, Polish, Portuguese, Swedish, Turkish, Spanish, Norwegian, Finnish)

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English

2. Ensure that the switch is turned to the ON position

before the saw blade comes in contact with the

lumber. The switch is turned ON when the trigger is

squeezed; and OFF when the trigger is released.

3. Moving the saw straight at a constant speed will

produce optimum cutting.

CAUTIONS

⅜ Before starting to saw, ensure that the saw blade

has reached full speed revolution.

⅜ Should the saw blade be stopped or made an

abnormal noise during operation, turn off the

switch immediately.

⅜ Always take care in preventing the power cord

from coming near the revolving saw blade.

MOUNTING AND DISMOUNTING THE SAW

BLADE

CAUTION

To avoid serious accident, ensure the switch is in the OFF

position, and the power source is disconnected.

1. Dismounting the saw blade

(1) Set the cutting volume at maximum, and place the

Circular Saw as shown in Fig. 8.

(2) Depress the lock lever, lock the spindle, and remove

the hexagonal-head bolt with the box wrench.

(3) While holding the safety cover lever to keep the safety

cover fully retracted into the saw cover, remove the

saw blade.

2. Mounting the Saw Blade:

(1) Thoroughly remove any sawdust which has

accumulated on the spindle, bolt and washers.

(2) As shown in Fig. 9, the side of Washer (A) with a

projected center the same diameter as the inner

diameter of the saw blade and the concave side of

Washer (B) must be fitted to the saw blade sides.

* Washer (A) is supplied for 2 types of saw blades

with the hole diameters of 16 mm and 30 mm.

(When buying the Circular Saw, one type of

washer (A) is supplied.)

In case the hole diameter of your saw blade does

not correspond to that of washer (A), please

contact the shop where you purchased the Circular

Saw.

(3) To assure proper rotation direction of the saw blade,

the arrow direction on the saw blade must coincide

with the arrow direction on the saw cover.

(4) Using the fingers, tighten the hexagonal-head bolt

retaining the saw blade as much as possible. Then

depress the lock lever, lock the spindle, and

thoroughly tighten the bolt.

CAUTION

After having attached the saw blade, reconfirm that the

lock lever is firmly secured in the prescribed position.

MAINTENANCE AND INSPECTION

1. Inspecting the saw blade:

Since use of a dull saw blade will degrade efficiency

and cause possible motor malfunction, sharpen or

replace the saw blade as soon as abrasion is noted.

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. 10)

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.

CAUTION

⅜ When replacing the new carbon brushes, always use

genuine Hitachi carbon brushes with the number (56)

specified in the drawing.

The brake may not work if other than the specified

carbon brushes are used.

⅜ When the brake becomes ineffective, replace the

carbon brushes with new ones.

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. Adjusting the base and saw blade to maintain

perpendicularity:

The angle between the base and the saw blade has

been adjusted to 90°, however should this

perpendicularity be lost for some reason, adjust in

the following manner:

(1) Turn the base face up (Fig. 11) and loosen the knob

and wing-bolt (Fig. 4 (A), Fig. 4 (B)).

(2) Apply a square to the base and the saw blade and

turning the slotted set screw with a slotted-head

screwdriver, shift the position of the base to produce

the desired right angle.

7. Service parts list

A: Item No.

B: Code No.

C: No. Used

D: Remarks

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 (i.e. code numbers and/or

design) may be changed without prior notice.

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Bosch gsr 12 2 Manual

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