Cutting Procedures; Mounting And Dismounting The Saw Blade; Maintenance And Inspection - Hitachi C 9SA2 Instrucciones De Manejo

English
4. Adjusting the guide piece
On the circular saw, it is possible to make fi ne adjustment
of the fi xing position of the guide piece, where the saw
blade and the premarked line are to be aligned.
When the saw is shipped from the factory, the linear
portion of a front scale on the guide piece is aligned with
the central position of the saw blade (Fig. 6).
Loosen the fi xed M4 screw on the guide piece, should the
fi xing position be wrong, and make necessary adjustment
of the position.

CUTTING PROCEDURES

1. Place the base on the material, then align the premarked
line and the sawblade with the guide piece front scale
section at the front of the base (Fig. 6).
When the base is not slanted, use the large cutout as the
guide (Fig. 6, Fig. 7 (A)).
If the base is slanted (45 degrees), use the small front
scale as the guide (Fig. 6, Fig. 7 (B)).
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
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.
A coating of PFTE is applied to the bases of the C9BA2
type. Be careful not to press too hard on the unit body
since this tends to place a heavy load on the motor. Using
a gentle pressure will make the piece slide easier and
allow cutting with less force. Trying to cut wood that is
covered with hard particle material such as sand or metal
chips tends to easily scratch damage the surface coating
so use caution.
○ Before starting to saw, ensure that the saw blade has
reached full speed revolution.
○ Should the saw blade be stopped or made an abnormal
noise during operation, turn off the switch immediately.
○ Always take care in preventing the power cord from
coming near the revolving saw blade.
○ Using the circular saw with the saw blade facing upwards
or sideways is very hazardous. Such uncommon
applications should be avoided.
○ When cutting materials, always wear protective glasses.
○ When fi nished 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. 8.
(2) Depress the lock lever, lock the spindle, and remove the
hexagonal-socket bolt with the Hex. bar wrench.
(3) While holding the lower guard lever to keep the lower
guard fully retracted into the saw cover, remove the saw
blade.
7
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
fi tted 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 fi ngers, tighten the hexagonal-socket 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, reconfi rm that the
lock lever is fi rmly secured in the prescribed position.

MAINTENANCE AND INSPECTION

1. Inspecting the saw blade
Since use of a dull saw blade will degrade effi ciency 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 fi gure 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
○ When replacing the new carbon brushes, always
use genuine Hitachi carbon brushes with the number
specifi ed in the drawing.
○ For model C9BA2 , the brake may not work if other than
the specifi ed carbon brushes are used.
When the brake becomes ineff ective, 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 wing-nut
and wing-bolt (Fig. 4 (A), Fig. 4 (B)).