Makita HR4041C Manuel D'instruction page 6

OPERATION
CAUTION:
Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip and
switch handle during operations.
Hammer drilling operation
Position the bit at the desired location for the hole, then
pull the switch trigger. Do not force the tool. Light pres-
sure gives best results. Keep the tool in position and
prevent it from slipping away from the hole.
Do not apply more pressure when the hole becomes
clogged with chips or particles. Instead, run the tool at
an idle, then remove the bit partially from the hole. By
repeating this several times, the hole will be cleaned out
and normal drilling may be resumed.
CAUTION:
• There is a tremendous and sudden twisting
force exerted on the tool/bit at the time of hole
break-through, when the hole becomes clogged
with chips and particles, or when striking rein-
forcing rods embedded in the concrete. Always
hold the tool firmly with both hands. Failure to
do so may result in the loss of control of the tool
and potentially severe injury.
Blow-out bulb (optional accessory)
► 1. Blow-out bulb
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition
Hold the tool firmly with both hands. Turn the tool on
and apply slight pressure on the tool so that the tool will
not bounce around, uncontrolled. Pressing very hard on
the tool will not increase the efficiency.
Core bit (optional accessory)
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
Install the center bit.
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► 1. Center bit
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.
6 ENGLISH
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