8
English
2. Disassembling
Follow the above procedures in reverse.
CAUTION:
Con
fi
rm that the depressed center wheel is
mounted
fi
rmly.
Con
fi
rm that the lock pin is disengaged by
pushing lock pin two or three times before
switching the power tool on.
MAINTENANCE AND INSPECTION
1.
Inspecting the depressed center wheel
Ensure that the depressed center wheel is free of cracks
and surface defects.
Replace the depressed center wheel when it has been
worn out to about 60 mm in external diameter.
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. 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.
4. Inspecting the carbon brushes (Fig. 3)
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
which have the same carbon brush numbers shown in
the
fi
gure. In addition, always keep carbon brushes clean
and ensure that they slide freely within the brush holders.
5. Carbon Brush Replacement
<Disassembly>
(1) Loosen the D4 tapping screw fastening the brush cover
and remove the brush cover from the handle (
Fig. 4-A
).
(2) Use a small screwdriver or similar tool, to shift the end of
the spring holding the carbon brush toward the outside of
the brush holder (
Fig. 4-B
).
(3) Remove the carbon brush from the brush holder, grasp
the pigtail and disconnect the carbon brush plug by
pulling out (
Fig. 4-B
).
<Assembly>
(1) Use a small screwdriver, etc., to insert the carbon brush
plug into the brush holder terminal (
Fig. 4-C
).
(2) Insert the carbon brush into the brush holder, use a small
screwdriver or similar tool, to shift the end of the spring
onto the top of the carbon brush (
Fig. 4-D
).
NOTE:
Make sure the end of the spring is not holding the
pigtail (
Fig. 4-E
).
(3) Engage the brush cover on the handle and tighten the D4
tapping screw.
NOTE:
Make sure the pigtail is not pinched by the brush
cover.
CAUTION
In the operation and maintenance of power tools, the
safety regulations and standards prescribed in each
country must be observed.
NOTE
Due HiKOKI’s continuing program of research and
development, the speci
fi
cations herein are subject to change
without prior notice.
PRACTICAL GRINDER APPLICATIONS
1. Since grinding by utilizing only the grinder’s own weight
is feasible, the grinder should never be pressed forcibly
against the plane to be ground Hold the grinder lightly so
that it only slightly contacts the plane to be ground.
Heavy pressure will reduce the revolving speed and
such deteriorate the
fi
nished surface, and phenomena as
overload will lead to burning out of the motor.
2
. Do not utilize the grinder entire surface when grinding.
Use only its peripheral surface by tilting the wheel at an
angle of 15-30°, as shown in
Fig. 1
.
3
. When a grinder equipped with a new depressed center
wheel is pushed forward (direction A), the wheel edge
may occasionally cut into the material to be ground.
Always pull it backward (direction B) in this instance.
However, once the depressed center wheel angle has
been adequately abraded, both forward and backward
operations are permissible.
4
. The provided depressed center wheel (resinoid wheel) is
rated as Class A grain and #36 grain size.
Accordingly, its range of applications cover a wide
variety, proving to be most suitable for heavy grinding
of general steel materials. Since the wheel grain size
is rather coarse, creating a
fi
ne-surfaced
fi
nish is very
di
ffi
cult.
In this instance, hold the grinder lightly as through trying
to lift it, and apply grinding slowly at a constant low
speed. Whereby a
fi
ne
fi
nish similar to that accomplished
with a
fi
ne-grain depressed center wheel is obtainable.
5. Switching on the grinder
The switch can be turned ON by turning its lever ON side,
or turn OFF by turning its lever to the OFF side.
6. Precaution after use
Do not lay the grinder down immediately after use in a
place where there are many shavings and much dirt and
dust until it has completely stopped revolving.
CAUTION
○
Shock to the main body can be the cause of cracks or
splits in the depressed center wheel. Be especially careful
to avoid sudden shocks when using the equipment.
If the main unit is accidentally bumped or dropped, make
a careful check for cracks or splits on the depressed
center wheel before further use.
○
Do not press the lock pin when the equipment is turning.
Also, do not turn on the switch when the lock pin is
pressed down.
ASSEEMBLING AND DISASSEMBLING THE
DEPRESSED CENTER WHEEL (Fig. 2)
CAUTION
Be sure to switch power OFF and disconnect the
attachment plug from the power receptacle to avoid
serious trouble.
1. Assembling (Fig. 2)
(1) Turn the equipment upsidedown so that the spindle will
be facing up.
(2) Mount the wheel washer onto the spindle.
(3) Fit the protuberance of the depressed center wheel or
diamond wheel onto the wheel washer.
(4) Assemble the wheel nut onto the spindle.
(For diamond wheel assembling, use the wheel nut with
the convex side against the diamond wheel.)
(5) Insert the push button to prevent rotation of the spindle,
and tighten the wheel nut securely with provided wrench,
as shown in
Fig. 2
.
000Book̲G13SP̲Asia.indb 8
000Book̲G13SP̲Asia.indb 8
2021/03/01 10:06:04
2021/03/01 10:06:04