11
OPERATION

Hammer drilling operation

Set the action mode changing knob to the symbol.
Position the bit at the desired location for the hole, then pull
the switch trigger.
Do not force the tool. Light pressure 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 sev-
eral times, the hole will be cleaned out and normal drilling
may be resumed.
CAUTION:
•There is 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 reinforcing rods embedded in the concrete.
Always use the side grip (auxiliary handle) and firmly
hold the tool by both side grip and switch handle during
operations. Failure to do so may result in the loss of
control of the tool and potentially severe injury.
Blow-out bulb
Use the blow-out bulb to clean out the hole.

Chipping/Scaling/Demolition

For Model HR2455 only
Set the action mode changing knob to the symbol.
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.
003866
1. Blow-out bulb
1
001302
003867