Operation - Makita GA4030 Instruction Manual

Installing or removing wheel guard
(For depressed center wheel,
multi disc / abrasive cut-off wheel,
diamond wheel)
For tool with locking screw type
wheel guard
► Fig.4: 1. Wheel guard 2. Screw 3. Bearing box
WARNING:
• When using a depressed center grinding wheel/
Multi-disc, flex wheel, wire wheel brush, cut-off
wheel or diamond wheel, the wheel guard must
be fitted on the tool so that the closed side of the
guard always points toward the operator.
• When using an abrasive cut-off / diamond
wheel, be sure to use only the special wheel
guard designed for use with cut-off wheels. (In
European countries, when using a diamond
wheel, the ordinary guard can be used.)
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 opera-
tor according to work. Be sure to tighten the screw securely.
To remove wheel guard, follow the installation proce-
dure in reverse.
For tool with clamp lever type wheel guard
► Fig.5: 1. Wheel guard 2. Bearing box 3. Screw 4. Lever
► Fig.6: 1. Screw 2. Lever
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: 1. Lock nut 2. Depressed center grinding
wheel/Multi-disc 3. Inner flange
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.
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: 1. Lock nut wrench 2. Shaft lock
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 weight of the tool applies adequate pres-
sure. Forcing and excessive pressure could
cause dangerous wheel breakage.
• ALWAYS replace wheel if tool is dropped while
grinding.
• NEVER bang or hit grinding disc or wheel onto
work.
• Avoid bouncing and snagging the wheel, espe-
cially when working corners, sharp edges etc.
This can cause loss of control and kickback.
• NEVER use tool with wood cutting blades and
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 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.
► Fig.9
9 ENGLISH