Maintenance; Replacing Carbon Brushes - Makita HR3000C Instruction Manual

serve to damage the tip of your bit, decrease the
tool performance and shorten the service life of the
tool.

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.

Replacing carbon brushes

1
001146
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.
003224
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.
003230
1. Commutator
2. Insulating tip
2
3. Carbon brush
3
1. Screwdriver
1
2. Brush holder
cover
2
1. Screwdriver
1
2. Brush holder cap
2
Lubrication
This tool requires no hourly or daily lubrication because it
has a grease-packed lubrication system. Lubricate the
tool every time the carbon brushes are replaced.
1
003235
Run the tool for several minutes to warm it up. Switch off
and unplug the tool.
Loosen the six screws and remove the handle. Note that
the top screws are different from other screws.
Disconnect the connector by pulling it.
1
003239
Remove the crank cap using a hex wrench. Rest the tool
on the table with the bit end pointing upwards. This will
allow the old grease to collect inside the crank housing.
1
003242
Wipe out the old grease inside and replace with a fresh
grease (30 g). Use only Makita genuine hammer grease
(optional accessory). Filling with more than the specified
amount of grease (approx. 30 g) can cause faulty
hammering action or tool failure. Fill only with the
specified amount of grease.
9
1. Screws
1. Connector
1. Crank cap
2
2. Hex wrench