Makita HR4003C Manual De Instrucciones página 8

Rotate the change lever so that the pointer points to
the symbol. Then make sure that the bit is securely
held in place by turning it slightly.
Depth gauge
1
► 1. Depth gauge 2. Lock button
The depth gauge is convenient for drilling holes of
uniform depth.
Press and hold the lock button, and insert the depth
gauge into the hex hole.
Make sure the toothed side of the depth gauge faces
the marking.
Adjust the depth gauge by moving it back and forth
while pressing the lock button. After adjustment, release
the lock button to lock the depth gauge.
NOTE:
• The depth gauge cannot be used at the position
where the depth gauge strikes against the gear
housing/motor housing.
OPERATION
CAUTION:
• Make sure the work material is secured and
not unstable. Flown object may cause personal
injury.
• Do not pull the tool out forcibly even the bit gets
stuck. Loss of control may cause injury.
2
Hammer drilling operation
Set the change lever to the
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 several times, the hole will be cleaned out
and you can continue drilling operation.
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
use the side grip (auxiliary handle) and firmly
hold the tool by both side grip and switch handle
during operations, and maintain good balance
and safe footing. 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.
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