How To Operate; Maintenance And Inspection - Hitachi CC 14ST Handling Instructions Manual

(4) At the termination of each cutting process, turn OFF the
switch to stop rotation and proceed with the subsequent
cutting job.
CAUTION
It does not necessarily cut rapidly when putting more
force on the handle.
Too much force on the handle will put excessive pressure
on the motor and reduce its capacity.
Do not fail to switch OFF the switch after operation is
completed and pull the plug out.
MOUNTING AND DISMOUNTING THE CUT-OFF
WHEEL
1. Dismounting the cut-off wheel (Fig. 3 and 4)
(1) Raise lower gurd (A) .
Press down on the stopper pin to bring it into contact with
the wheel washer.
Rotate the cut-off wheel, pass the stopper pin through the
hole on the wheel washer, and then remove the M10 bolt
with the hexagonal bar wrench supplied.
(2) Remove the bolt, washer (A), and the wheel washer and
detach the cut-off wheel. (Fig. 4)
CAUTION
Do not remove the O-ring or sleeve from the cut-off wheel
spindle.
2. Mounting the cut-off wheel
Throughly remove dust from the wheel washers and
bolt then mount the wheel by following the dismounting
procedures in reverse order. Return lower gurd (A) to its
original position.
CAUTION
Confi rm that the stopper which was used for installation
and removal of the cut-off wheel has returned to the
retract position.

HOW TO OPERATE

1. Procedure for fi xing the cutting material (Fig. 5
and 6)
Place the workpiece material between vise (A) and vise
(B), raise the clutch and push the screw handle to bring
vise (A) lightly into contact with the workpiece material,
as shown in Fig. 5.
Then, turn the clutch down, and securely fi x the
workpiece material in position by turning the screw
handle. When the cutting job is completed, turn the
screw handle 2 or 3 times to loosen the vise (A),
and remove the workpiece material, as shown in
Fig. 6.
CAUTION
Never remove or install a workpiece material while the
cut-off wheel is rotating, to avoid personal injury.
2. Cutting at angles (Fig. 7)
(1) The machine permits cutting at angles of 0° – 45°.
(2) Loosen the two M10 hexagon socket head bolts on the
vice (B), then set the working surface on the vice-jaw at
any angles of 0°, 30°, or 45° . Upon completion of setting,
securely tighten the two 10 mm bolts.
3. Moving the stationary vise-jaw (Fig. 8)
The vise opening is set at the maximum of
165 mm when shipped from the factory. In case an
opening of more than 165 mm is required, move the vise
to the position shown by the chain line after unscrewing
the two bolts. The maximum opening can be set in two
steps 200 mm and 235 mm. When the cutting material
is excessively wide, the vise can be eff ectively used by
repositioning the stationary side of the vise-jaws.
4. Cutting Long Workpiece Materials (Fig.9)
Make sure you place both ends of long workpiece
materials on blocks that are the same height as the base
to stabilize it prior to beginning work.
5. How to use square block (Fig. 10)
When the cut-off wheel has a reduced outer diameter,
insert between the vise (A) and (B) a square block slightly
smaller than the dimension of workpiece being cut to use
the cut-off wheel economically.
6. Adjusting the Cutting Depth (Fig. 11)
When the cut-off wheel has a reduced outer diameter,
change the height of the stopper bolt to adjust the cutting
depth. Adjustments are made by loosening the lock nut
and rotating the stopper bolt. When fi nished, retighten
the lock nut to fi x the stopper bolt in place.
It is possible to eradicate splinters depending on the
material.
CAUTION
○ Make sure the height of the stopper bolt is readjusted
when the cut-off wheel is replaced.
○ If the stopper bolt is too low, there is a chance that the
cut-off wheel will cut into the base.
7. Adjusting the Spark Sheet (Fig.12)
Loosen the screw holding the spark sheet in place with a
Phillips screwdriver to adjust the angle.
Change the angle in accordance with the prevalent
environment and the work required to adjust the direction
in which the sparks fl y.
8. Transporting the Unit (Fig.13)
When moving the unit, attach the chain hook onto the
chain and grip the carrying handle to carry it.

MAINTENANCE AND INSPECTION

CAUTION
Be sure to switch off and pull off the plug from the power
outlet before inspection and maintenance.
1. Replacing a cut-off wheel
When the cut-off wheel has already become dull while
continually using, the unnecessary load is got from the
motor. Consequently, redress or replace a dull cut-off
wheel to ensure grinding effi ciency.
2. Inspecting the carbon brushes (Fig. 14)
The Motor employs carbon brushes which are
consumable parts. When they become worn to or near
the "wear limit", it could result in motor trouble. When an
auto-stop carbon brush is equipped, the motor will stop
automatically. At that time, replace both carbon brushes
with new ones shown in the fi gure. In addition, always
keep carbon brushes clean and ensure that they slide
freely within the brush holders.
3. 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.
4. Replacing supply cord
If the replacement of the supply cord is necessary, this
has to be done by Hitachi Authorized Service Center in
order to avoid a safety hazard.
5. Lubrication
Supply oil in the following oil supply points once a month
so as to keep the machine workable for a long time.
Oil supply points
○ Rotary part of shaft
○ Rotary part of vise
○ Slide way of vise (A)
English
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