Makita DHR242 Manuel D'instructions page 29

BEFORE USE
Installing or removing the dust extraction system
WARNING:
• Always be sure that the tool is switched off and battery cartridge is removed before carrying out any work
on the tool. Failure to switch off and remove the battery cartridge may result in serious personal injury from
accidental start-up.
• Before installing the dust extraction system, make sure that the attachment points and the power tool itself,
particularly the electrical interface on the power tool, are free from dust and foreign matter. After installing
the dust extraction system, also make sure that it is securely installed.
NOTE:
• This dust extraction system is intended for use when drilling in only concrete. Never use this system when drilling in
metal or wood.
• This dust collection system collect a significant percentage of the dust produced at work but not all of it.
• Empty the filter container regularly. Failure to empty the filter container regularly may cause dust to release.
• Do not use the dust extraction system in core drilling or chiseling applications.
To install the dust extraction system, follow the procedure below.
1. Hold the power tool so that finger(s) does not press the switch trigger. (Fig. 1)
2. Align the interface of the attachment with the power tool guide and slide it on the tool until it locks with a double click
sound.
3. After installing the attachment on the power tool, make sure that it is secured properly.
To remove the dust extraction system, follow the procedure below.
1. Hold the power tool so that finger(s) does not press the switch trigger. (Fig. 2)
2. Press the release button on the attachment and with the button pressed pull it away from the power tool.
OPERATION
CAUTION:
• Do not use the tool in wet conditions such as work on concrete surface and the similar.
Adjusting the tip protrusion length
The protrusion of the tip is adjustable according to your hammer drill bit length.
1. Hold the power tool so that finger(s) does not press the switch trigger. (Fig. 3)
2. CAUTION: When the stroke adjusting button is pressed, the telescopic section is released and then it may jump
out up to 100 mm under spring pressure. Wear goggles.
Keep the bar tip of the attachment away from any objects keeping the above jumping-out distance in mind and
never point the attachment at yourself, a bystander or animals.
Press the stroke adjusting button and keep pressing it.
NOTE:
• When starting pressing the stroke adjusting button, always leave the sliding bar free and not held with hand.
3. Press the power tool with the hammer drill bit installed against the wall until the drill bit tip touches the wall.
4. Release the stroke adjusting button to lock it.
Setting the drilling depth (depth gauge)
If holes require to be drilled to an exact depth, the correct depth needs to be determined by drilling test holes.
1. Hold the power tool so that finger(s) does not press the switch trigger. (Fig. 4)
2. Press the depth gauge button and with the button pressed slide the lock button carriage to the desired length and
release it.
The distance (X) between the attachment housing and the depth gauge button is equal to the drilling depth.
Operation
CAUTION:
• Always follow the instruction in OPERATION of the instruction manual for Makita hammer drills. Failure to observe
the instruction manual may cause personal injury.
WARNING:
• Always follow national laws, regulations and ordinance which prescribe working with materials hazardous to health.
Drilling
When drilling into concrete, hold the power tool firmly with both hands so that the entire nozzle top keeps in tight contact
with the concrete surface. Any part of the nozzle away from the concrete surface may cause poor dust collection.
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