Makita GA7050 Instruction Manual page 9

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 (in the A direction)
and then pull the switch trigger (in the B direction).
Release the switch trigger to stop.
For continuous operation, push in the lock lever (in the A
direction), pull the switch trigger (in the B direction) and
then pull the lock lever (in the C direction).
To stop the tool from the locked position, pull the switch
trigger fully (in the B direction), then release it.
Indication lamp (For model GA7050R/GA9050R)
Fig.3
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.
Soft start feature
These models begin to run slowly when they are turned
on. This soft start feature assures smoother operation.
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)
CAUTION:
Always be sure that the side grip is installed
•
securely before operation.
Fig.4
Screw the side grip securely on the position of the tool as
shown in the figure.
Installing or removing wheel guard (For
depressed center wheel , multi disc , wire
wheel brush / abrasive cut-off wheel ,
diamond wheel)
WARNING:
When using a
•
wheel/Multi-disc, flex wheel or wire wheel brush,
the wheel guard must be fitted on the tool so that
the closed side of the guard always points toward
the operator.
depressed center grinding
When using an abrasive cut-off / diamond wheel,
•
be sure to use only the special wheel guard
designed for use with cut-off wheels.
For tool with locking screw type wheel guard
Fig.5
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.6
Fig.7
Loosen the lever on the wheel guard. 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 nut 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.8
Mount the inner flange onto the spindle. Fit the
wheel/disc on the inner flange and screw the lock nut
onto the spindle.
NOTE:
When using a more than 7 mm thick depressed center
grinding wheel, overturn the lock nut and screw it onto
the spindle.
Super flange
Models with the letter F are standard-equipped with a
super flange. Only 1/3 of efforts needed to undo lock nut,
compared with conventional type.
For Australia and New Zealand
Fig.9
Mount the inner flange onto the spindle. Fit the
wheel/disc on the inner flange and screw the lock nut
with its protrusion facing downward (facing toward the
wheel).
To tighten the lock nut, press the shaft lock firmly so that
the spindle cannot revolve, then use the lock nut wrench
and securely tighten clockwise.
9