Maintenance - Makita GA5020 Bedienungsanleitung

Operation with abrasive cut-off / diamond
wheel (optional accessory)
Fig.15
The direction for mounting the lock nut and the inner
flange varies by wheel thickness. Refer to the table
below.
115 mm (4-1/2") / 125 mm (5") / 150 mm (6")
Abrasive cut-off wheel
Thickness: Less than
4 mm (5/32")
22.23 mm (7/8")
1. Lock nut
011184
WARNING:
When using an abrasive cut-off / diamond wheel,
•
be sure to use only the special wheel guard
designed for use with cut-off wheels.
NEVER use cut-off wheel for side grinding.
•
Do not "jam" the wheel or apply excessive pressure.
•
Do not attempt to make an excessive depth of cut.
Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in
the cut and the possibility of kickback, wheel
breakage and overheating of the motor may occur.
Do not start the cutting operation in the workpiece.
•
Let the wheel reach full speed and carefully enter
into the cut moving the tool forward over the
workpiece surface. The wheel may bind, walk up
or kickback if the power tool is started in the
workpiece.
During cutting operations, never change the angle
•
of the wheel. Placing side pressure on the cut-off
wheel (as in grinding) will cause the wheel to crack
and break, causing serious personal injury.
A diamond wheel shall be operated perpendicular
•
to the material being cut.
Thickness: 4 mm (5/32")
or more
1
2
22.23 mm (7/8")
3
2. Abrasive cut-off wheel
Diamond wheel
Thickness: Less than
4 mm (5/32")
22.23 mm (7/8")
3. Inner flange

MAINTENANCE

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before attempting to perform inspection
or maintenance.
Never use gasoline, benzine, thinner, alcohol or
•
the like. Discoloration, deformation or cracks may
result.
The tool and its air vents have to be kept clean.
Regularly clean the tool's air vents or whenever the
vents start to become obstructed.
Fig.16
Replacing carbon brushes
Fig.17
Remove and check the carbon brushes regularly.
Replace when they wear down to the limit mark. Keep
the carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove the brush holder caps.
Take out the worn carbon brushes, insert the new ones
and secure the brush holder caps.
Fig.18
After replacing brushes, plug in the tool and break in
brushes by running tool with no load for about 10
minutes. Then check the tool while running and electric
brake operation when releasing the switch trigger. If
11
Thickness: 4 mm (5/32")
or more
1
4
22.23 mm (7/8")
3
4. Diamond wheel