6
English
3. Moving the saw straight at a constant speed will
produce optimum cutting.
CAUTIONS
䡬
Before starting to saw, ensure that the saw
blade has reached full speed revolution.
䡬
Should the saw blade be stopped or made an
abnormal noise during operation, turn off the
switch immediately.
䡬
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 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-head bolt with the box wrench.
(3) While holding the safety cover lever to keep the
safety cover 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) 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 fitted to the saw blade sides.
*
Washer (A) is supplied for 2 types of saw blades
with the inner diameters of 16 mm and 30 mm.
(When buying the Circular Saw, one type of
washer (A) is spplied.)
In case the inner 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-head 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, 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. 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
brush with a new one 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:
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 knob
and wing-bolt (
Fig. 4 (A)
,
Fig. 4 (B)
).
(2) Apply a square to the base and the saw blade and
turning the slotted set screw with a slotted-head
screwdriver, shift the position of the base to produce
the desired right angle.
NOTE
Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.
IMPORTANT
Correct connection of the plug
The wires of the main lead are coloured in accordance
with the following code:
Blue:
– Neutral
Brown:
– Live
As the colours of the wires in the main lead of this tool
may not correspond with the coloured markings
identifying the terminals in your plug proceed as follows:
The wire coloured blue must be connected to the terminal
marked with the letter N or coloured black.
The wire coloured brown must be connected to the
terminal marked with the letter L or coloured red.
Neither core must be connected to the earth terminal.
NOTE
This requirement is provided according to BRITISH
STANDARD 2769: 1984.
Therefore, the letter code and colour code may not be
applicable to other markets except The United Kingdom.
Information concerning airborne noise and vibration
The measured values were determined according to
EN50144.
The typical A-weighted sound pressure level: 94 dB (A)
The typical A-weighted sound power level: 107 dB (A)
Wear ear protection.
The typical weighted root mean square acceleration value
does not exceed 2.5 m/s
2
.
