Operation - Makita GA4030 Instruction Manual

Switch action
Fig.2
CAUTION:
Before plugging in the tool, always check to see
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that the slide switch actuates properly and returns
to the "OFF" position when the rear of the slide
switch is depressed.
To start the tool, slide the switch lever toward the "I
(ON)" position. For continuous operation, press the front
of the switch lever to lock it.
To stop the tool, press the rear of the switch lever, then
slide it toward the "O (OFF)" position.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
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unplugged before carrying out any work on the
tool.
Installing side grip (handle)
Fig.3
CAUTION:
Always be sure that the side grip is installed
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securely before operation.
Screw the side grip securely on the position of the tool
as shown in the figure.
Installing or removing wheel guard
Fig.4
CAUTION:
The wheel guard must be fitted on the tool so that
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the closed side of the guard always points toward
the operator.
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 to such an angle that it can
protect the operator according to work. 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.5
Fig.6
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
Fig.7
WARNING:
Always use supplied guard when depressed center
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grinding wheel/Multi-disc is on tool. Wheel can
shatter during use and guard helps to reduce
chances of personal injury.
Mount the inner flange onto the spindle. Fit the
wheel/disc on the inner flange and screw the lock nut
onto the spindle.
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.
Fig.8
To remove the wheel, follow the installation procedure in
reverse.
WARNING:
Only actuate the shaft lock when the spindle is not
moving.

OPERATION

WARNING:
It should never be necessary to force the tool. The
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weight of the tool applies adequate pressure.
Forcing and excessive pressure could cause
dangerous wheel breakage.
ALWAYS replace wheel if tool is dropped while
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grinding.
NEVER bang or hit grinding disc or wheel onto
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work.
Avoid bouncing and snagging the wheel, especially
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when working corners, sharp edges etc. This can
cause loss of control and kickback.
NEVER use tool with wood cutting blades and
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other saw blades. Such blades when used on a
grinder frequently kick and cause loss of control
leading to personal injury.
CAUTION:
After operation, always switch off the tool and wait
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until the wheel has come to a complete stop before
putting the tool down.
Grinding and sanding operation
ALWAYS hold the tool firmly with one hand on housing
and the other on the side handle. Turn the tool on and
then apply the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an
angle of about 15 degrees to the workpiece surface.
During the break-in period with a new wheel, do not work
the grinder in the B direction or it will cut into the
workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both A
and B direction.
7