Manual Hitachi C7ST (page 10 of 48) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

CAUTION

It is very hazardous to allow this lever (A) to remain

loosened. Always thoroughly clamp it.

3. Regulating the guide

The cutting position can be regulated by moving the

guide to the left or right after loosening its wing bolt.

The guide can be mounted on either the left or the

right side (Fig. 4).

CUTTING PROCEDURES

1. Place the saw body (base) on the lumber, and align

the intended line of cut with the saw blade, using

the notch at the front of the base. This relationship

of base to lumber should remain unchanged

regardless of the inclination of the base (Fig. 5).

2. Turn ON the switch before the saw blade contacts the

lumber. The switch is turned ON when the trigger is

squeezed, and turned OFF when the trigger is released.

3. Moving the saw straight at a constant speed will

produce optimum cutting.

CAUTIONS

Prior to cutting operation, make sure the material you

are going to cut. If the material to be cut is expected to

generate harmful / toxic dusts, make sure the dust bag or

appropriate dust extraction system is connected with

dust outlet tightly.

Wear the dust mask additionally, if available.

⅜ Before starting to saw, confirm that the saw blade

has attained full-speed revolution.

⅜ Should the saw blade stop or make an abnormal

noise while operating, promptly turn OFF the switch.

⅜ Always take care in preventing the power cord from

coming near to the revolving saw blade.

⅜ Using the circular saw with the saw blade facing

upwards or sideways is very hazardous. Such

uncommon applications should be avoided.

⅜ When cutting materials, always wear protective glasses.

⅜ When finished with a job, pull out the plug from

the receptacle.

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. 6.

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

the hexagonal-flange bolt with the box wrench.

(3) While holding the lower guard lever to keep the

lower guard fully retracted into the saw cover,

remove the saw blade.

2. Mounting the Saw Blade

(1) Thoroughly remove any sawdust which has accu-

mulated on the spindle, bolt and washers.

(2) As shown in Fig. 7, 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 3 types of saw blades

with the hole diameters of 16 mm, 20 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-flange bolt

retaining the saw blade as much as possible. Then

depress the lock lever, lock the spindle, and thor-

oughly 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. Fail-

ure to do so could result in serious hazard.

3. Inspecting the carbon brushes (Fig. 8)

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 (Fig. 9)

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. 10) and loosen the wing

bolt (A).

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

turning the screw with a screwdriver, shift the

position of the base to produce the desired right

angle.(Fig. 11)

7. Service parts list

CAUTION

Repair, modification and inspection of Hitachi Power

Tools must be carried out by a 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.

01Eng_C7ST_WE 4/15/11, 13:389

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Hitachi C7ST Manual

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