8
further in. To stop the tool from the locked position, pull
the switch trigger fully, then release it.
For tool with lock-off button
To prevent the switch trigger from being accidentally
pulled, a lock-off button is provided.
To start the tool, depress the lock-off button and pull the
switch trigger. Release the switch trigger to stop.
For tool with type B switch trigger (Fig. 3)
For tool with the lock-on switch
To start the tool, simply pull the switch trigger (A).
Release the switch trigger to stop. For continuous
operation, pull the switch trigger (A) and then push in the
lock lever (B). To stop the tool from the locked position,
pull the switch trigger (A) fully, then release it.
For tool with the lock-off switch
To prevent the switch trigger from accidentally pulled, a
lock lever is provided. To start the tool, push in the lock
lever (B) and then pull the switch trigger (A). Release the
switch trigger to stop.
For tool with the lock on and lock-off switch
To prevent the switch trigger from accidentally pulled, a
lock lever is provided. To start the tool, push in the lock
lever (B) and then pull the switch trigger (A). Release the
switch trigger to stop. For continuous operation, push in
the lock lever (B), pull the switch trigger and then push the
lock lever further in (B). To stop the tool from the locked
position, pull the switch trigger (A) fully, then release it.
Electronic function
Constant speed control (For model GA5020C,
GA5021C, GA6020C, GA6021C)
• Possible to get fine finish, because the rotating speed
is kept constantly even under the loaded condition.
• Additionally, when the load on the tool exceeds
admissible levels, power to the motor is reduced to
protect the motor from overheating. When the load
returns to admissible levels, the tool will operate as
normal.
Soft start feature
• Soft start because of suppressed starting shock.
Indication lamp (Fig. 4)
The indication lamp lights up green when the tool is
plugged. If the indication lamp does not light up, the mains
cord or the controller may be defective. The indication
lamp is lit but the tool does not start even if the tool is
switched on, the carbon brushes may be worn out, or the
controller, the motor or the ON/OFF switch may be
defective.
Unintentional restart proof
Even locking lever keeping the switch trigger depressed
(Lock-on position) does not allow the tool to restart even
when the tool is plugged.
At this time, the indication lamp flickers red and shows the
unintentional restart proof device is on function.
To cancel the unintentional restart proof, pull the switch
trigger fully, then release it.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Installing side grip (handle) (Fig. 5)
CAUTION:
• Always be sure that the side grip is installed securely
before operation.
Screw the side grip securely on the position of the tool as
shown in the figure.
Installing loop handle (Accessory)
CAUTION:
• Always be sure that the loop handle is installed
securely before operation. (Fig. 6)
Always install the loop handle on the tool before
operation. Hold the tool's switch handle and the loop
handle firmly with both hands during operation.
Install the loop handle so that its protrusion will fit into the
matching hole in the gear housing.
Install the bolts and tighten them with the hex wrench.
The loop handle can be installed in two different directions
as shown in the figures whichever is convenient for your
work. (Fig. 7 & 8)
Installing or removing wheel guard
CAUTION:
• When using a depressed center grinding wheel/Multi-
disc, wire wheel brush or cut-off wheel, the wheel
guard must be fitted on the tool so that the closed side
of the guard always points toward the operator.
For tool with locking screw type wheel guard (Fig. 9)
Mount the wheel guard with the protrusion on the wheel
guard band aligned with the notch on the bearing box.
Then rotate the wheel guard around 180 degrees
counterclockwise. Be sure to tighten the screw securely.
To remove wheel guard, follow the installation procedure
in reverse.
For tool with clamp lever type wheel guard
(Fig. 10 & 11)
Loosen the lever on the wheel guard after loosening the
screw. Mount the wheel guard with the protrusion on the
wheel guard band aligned with the notch on the bearing
box. Then rotate the wheel guard around to the position
shown in the figure. Tighten the lever to fasten the wheel
guard. If the lever is too tight or too loose to fasten the
wheel guard, loosen or tighten the screw to adjust the
tightening of the wheel guard band.
To remove wheel guard, follow the installation procedure
in reverse.
Installing or removing depressed center
grinding wheel/Multi-disc (accessory)
WARNING:
• Always use supplied guard when depressed center
grinding wheel/Multi-disc is on tool. Wheel can shatter
during use and guard helps to reduce chances of
personal injury. (Fig. 12)
