Makita HR5000 Manuel D'instructions page 7

To remove the core bit, follow the procedures 1 or 2.
1. Rotate the change lever to the
rest the core bit on the concrete and turn the tool
on. The core bit will come loose from the hammer-
ing action.
2. Hold the adapter with the wrench, insert the rod
(optional accessory) into the hole in the core bit
and tap with a hammer to unscrew.
1
► 1. Rod
When not using the center bit
Screw the core bit on the adapter. Install the adapter
with the core bit in the tool in the same manner as a
drill bit.
► 1. Core bit 2. Adapter
Rotate the change lever to the
position. Then
bit on the concrete and turn the tool on. Once the core
bit has cut a shallow groove into the concrete, rotate the
change lever to the
NOTE:
•
To remove the core bit, follow the same removal proce-
dures covered in "When using the center bit".
MAINTENANCE
•
•
Replacing carbon brushes
1
2
► 1. Commutator 2. Insulating tip 3. Carbon brush
When the resin insulating tip inside the carbon brush
is exposed to contact the commutator, it will automati-
cally 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.
7 ENGLISH
position and resume drilling.
No problem is caused even if the core bit
unscrews slightly during brief use since the core
bit rotates in the tightening direction.
CAUTION:
Always be sure that the tool is switched off and
unplugged before attempting to perform inspec-
tion or maintenance.
Never use gasoline, benzine, thinner, alcohol
or the like. Discoloration, deformation or cracks
may result.
1
position. Rest the core
2
3