Replacing Carbon Brushes - Makita HR3000C Manuel D'instruction

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Blow-out bulb (optional accessory)
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition
Set the change lever and the shift lever to the
Hold the tool firmly with both hands. Turn the tool on and
apply slight pressure on the tool so that the tool will not
bounce around, uncontrolled. Pressing very hard on the
tool will not increase the efficiency.
Drilling in wood or metal
1
Use the optional drill chuck assembly. When installing it,
refer to "Installing or removing the bit" described on the
previous page.
Set the change lever and the shift lever to the
You can drill up to 13 mm (1/2") diameter in metal and up
to 30 mm (1-3/16") diameter in wood.
CAUTION:
Never use "rotation with hammering" when the drill
chuck assembly is installed on the tool. The drill
chuck assembly may be damaged.
Pressing excessively on the tool will not speed up
the drilling. In fact, this excessive pressure will only
002449
1. Blow-out bulb
1
003204
symbol.
003221
1. Drill chuck
assembly
symbol.
serve to damage the tip of your bit, decrease the
tool performance and shorten the service life of the
tool.
There is a tremendous twisting force exerted on the
tool/bit at the time of hole breakthrough. Hold the
tool firmly and exert care when the bit begins to
break through the workpiece.
Always secure small workpieces in a vise or similar
hold-down device.
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.

Replacing carbon brushes

1
When the resin insulating tip inside the carbon brush is
exposed to contact the commutator, it will automatically
shut off the motor. When this occurs, both carbon
brushes should be replaced. 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 cover.
8
001146
1. Commutator
2. Insulating tip
2
3. Carbon brush
3
003224
1. Screwdriver
1
2. Brush holder
cover
2

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