Cutting Procedures; Mounting And Dismounting The Saw Blade; Maintenance And Inspection - Hitachi C 13U Manual

English
5. Adjusting the guide (Fig. 6)
The cutting position can be adjusted by moving the
guide to the left or right after loosening its wing bolt.
The guide can be mounted on either the right or left
side of the base.

CUTTING PROCEDURES

1. Place the saw body (base) on the lumber and align the
premarked line of cut with the saw blade, using the
carved line at the front of the base. Align with the
premarked line on the right when not inclined, and at
the premarked line on the left at 45° inclined. (Fig. 6)
2. Ensure that the switch is turned to the ON position
before the saw blade comes in contact with the lum-
ber. The switch is turned ON when the trigger is
squeezed; and OFF when the trigger is released.
3. Moving the circular saw straight with an appropriate
speed will result in optimum cutting.
CAUTIONS
Before starting cutting operation, ensure that the
saw blade has reached full speed revolution.
Should the saw blade stop or makes an abnormal
noise during operation, turn off the switch immedi-
ately.
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 plug is disconnected from the
receptacle.
1. Dismounting the saw blade
(1) Set the cutting depth at maximum, and place the
Circular Saw as shown in Fig. 7.
(2) Depress the lock lever to lock the spindle, and remove
the hexagon head bolt with the provided wrench by
turning it counterclockwise.
(3) While holding the safely cover lever to keep it fully
retracted into the saw cover, remove the saw blade.
2. Mounting the Saw Blade:
(1) Thoroughly remove any sawdust which has accumu-
lated on the spindle, bolt and washers.
(2) The inside diameter of the saw blade differs according
to the market area the circular saw is sold in.
(a) For mounting saw blade of 25 mm inner diameters
(Fig. 8 (a)), mount the saw blade to washer (A)
whose size is identical with the saw blade inner
diameter, and the concave side of washer (B) faces
the saw blade.
(b) In the case of a saw blade of 30 mm inner diameter
(Fig. 8 (b)), mount the adapter ring to washer (A)
whose size is identical with the adapter ring inner
diameter and mount the saw blade on the adapter
ring, and the concave side of washer (B) faces the
saw blade.
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(3) To check proper rotation direction of the saw blade, the
arrow direction on the saw blade must coincide with
the arrow direction embossed on the saw cover.
(4) Using the fingers, tighten the hexagon head
retaining the saw blade as much as possible. Then
depress the lock lever, lock the spindle, and securely
tighten the bolt.
CAUTION
On completion of mounting the saw blade, reconfirm
that the lock lever is firmly resumed in the original
position.

MAINTENANCE AND INSPECTION

1. Inspecting the saw blade:
Since use of a dull saw blade will degrade efficiency
and cause possible motor malfunction, resharpen 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 loosened, retighten them immediately. Failure to
do so could result in serious hazard.
3. Inspecting the carbon brushes (Fig. 9)
The motor employs carbon brushes which are con-
sumable parts. Since an excessively worn carbon
brushes can result in motor trouble, replace the carbon
brushes with new ones having the same carbon brush
No. shown in the figure when they become worn to or
near the "wear limit". In addition, always keep carbon
brushes clean and ensure that they slide freely within
the brush holders.
4. Replacing a carbon brushes:
Disassemble the brush caps with a 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.
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: 91 dB (A).
The typical A-weighted sound power level: 104 dB (A)
Wear ear protection.
The typical weighted root mean square acceleration
value does not exceed 2.5 m/s
bolt
2 .