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

CAUTION
To avoid possible accident, always ensure that the
portion of lumber remaining after cutting is securely
anchored or held in position.

ADJUSTING THE SAW PRIOR TO USE

1. Adjusting the cutting depth
As shown in Fig. 2 cutting depth adjustment can be
accomplished by loosening clamp lever and shifting
the base. When the base and saw blade are at a
perpendicular angle, use the link scale to adjust the
cutting depth.
Measure the distance that the saw blade extends to
adjust the cutting depth to the correct distance be-
cause the scale marks are only indicated for reference.
After the adjustment is over, securely tighten the
clamp lever.
2. Installing riving knife
(1) Place the base facing upward and loosen the clamp
lever. Lift the base until the depth of cut on the main
unit reaches the minimum state, fasten the clamp
lever, and secure the base. (Fig. 2)
(2) Install the riving knife to the arm securely with the 2
attached bolts. (Fig. 3)
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 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 recepta-
cle.
1. Dismounting the saw blade
(1) Set the cutting depth at maximum, and place the Circu-
lar 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.
(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 posi-
tion.

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.
English
bolt
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