Maintenance - Makita HR3520B Instruction Manual

Core bit (optional accessory)
When 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.
003209
Install the center bit.
1
003210
Rest the core bit on the concrete and turn the tool on.
Once the core bit has cut a shallow groove into the
concrete, remove the center bit. Then resume drilling.
003212
To remove the core bit, follow the procedures 1 or 2.
003214
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
hammering action.
2. Hold the adapter with the wrench, insert the rod
(optional accessory) into the hole in the core bit
1. Core bit
1
2. Adapter
2
1. Center bit
position. Then
and tap with a hammer to unscrew.
1
003215
When not using the center bit
003216
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.
Rotate the change lever to the
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
003212
NOTE:
No problem is caused even if the core bit unscrews
•
slightly during brief use since the core bit rotates in
the tightening direction.
To remove the core bit, follow the same removal
procedures covered in "When using the center bit".

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.
7
1. Rod
1. Core bit
1
2. Adapter
2
position. Rest the core
position and resume drilling.