Makita DBM230 Notice Originale page 23

Gear shifting
The DBM 230 is equipped with a mechanical 3-gears transmission in oil bath.
Adjust the rotation speed of the engine to the drill diameter (for details see
identification plate).
Turn the gear switch to a faster/slower gear until it arrests. Gears must only be
shifted when the engine is at stand-still. It may be necessary to support the
switching operation by slightly turning the lead screw.
Warning!
Never use force, shift gears only when the motor decelerates or is at stand-
still!
Do not use tools e.g. wrenches, hammers for gear shifting!
Changing the drill bit
The drill spindle has a right-hand thread.
To retain the spindle use an open-end wrench 32mm on the drill spindle.
Never remove the drill bit by hitting it (with a hammer) as this will cause
damage to the core drill tool. Putting some waterproof grease on the drill
spindle thread and a copper ring placed between the spindle and the drill bit
will further facilitate the removal of the drill bit.
Operating the drill unit
In order to safely operate the tool, please observe the following notes:
Details to the work area
Keep the work area free of everything which could obstruct operations.
Provide for adequate illumination of the work area.
Adhere to the regulations concerning the power supply.
Caution!
The tool is heavy and may heat up during operations or
sharpening. You could burn your hands, cut, tear or
squash yourself on the segments.
Before working on the equipment pull the power plug.
Raise the engine retainer with the core drill until it
arrests in the final position. Always wear protective
gloves when changing tools.