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

English
3. Adjusting the riving knife
Loosen the hexagon head bolts used to clamp the
riving knife, adjust the riving knife to the position
shown in Fig. 4 and securely retighten the bolts.
After adjustment, ensure that the riving knife moves
by following the adjusted cutting depth.
4. Adjusting the angle of inclination
As shown in Fig. 5 by loosening the wing bolt on
the scale and the wing bolt (Fig. 2) on the rear of
the base, the saw blade may be inclined to a
maximum angle of 45° in relation to the base.
Always ensure that the wing bolts are securely
tightened after making the desired adjustment.
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
lumber. 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
immediately.
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 power
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
accumulated on the spindle, bolt and washers.
(2) Check hole diameter of saw blade, and install washer
(A) to spindle so that hole diameter of saw blade
can agree with boss diameter of washer (A).
Directional change of washer (A) can make hole
diameter of saw blade applicable to both 25 mm and
25.4 mm diameters respectively. Groove of 42 mm
6
diameter is provided on the surface of washer (A)
that faces 25 mm hole diameter.(Fig. 8, Fig. 9)
Mount the saw blade to washer (A) whose size is
identical with the saw blade hole size, and the concave
side of washer (B) faces the saw blade. (Fig. 8)
(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 bolt
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. 10)
The motor employs carbon brushes which are
consumable 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 screw-driver.
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.