Operation; Optional Accessories; Maintenance - Makita HR4002 Instruction Manual

Depth gauge (Fig. 12)
The depth gauge is convenient for drilling holes of uniform
depth. Insert the depth gauge into the hole in the grip
base. Adjust the depth gauge to the desired depth and
then tighten the clamp screw to secure the depth gauge.
The depth gauge is convenient for drilling holes of uniform
depth. Loosen the clamp screw and adjust the depth
gauge to the desired depth. After adjusting, tighten the
clamp screw firmly.
NOTE:
• The depth gauge cannot be used at the position where
the depth gauge strikes against the tool body.
• The depth gauge cannot be used at the position where
the depth gauge strikes against the gear housing/motor
housing.

OPERATION

Hammer drilling operation (Fig. 13)
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 normal drilling may be resumed.
CAUTION:
• When the bit begins to break through concrete or if the
bit strikes reinforcing rods embedded in concrete, the
tool may react dangerously. Maintain good balance and
safe footing while holding the tool firmly with both
hands to prevent dangerous reaction.
Blow-out bulb (optional accessory)
(Fig. 14)
After drilling the hole, use the blow-out bulb to clean the
dust out of the hole.
Chipping/Scaling/Demolition (Fig. 15)
Set the change lever to the
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.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection or
maintenance.
Lubrication
CAUTION:
• This servicing should be performed by Makita
Authorized Service Centers only.
This tool requires no hourly or daily lubrication because it
has a grease-packed lubrication system. It should be
relubricated regularly. Send the complete tool to Makita
symbol.
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Authorized or Factory Service Center for this lubrication
service.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION:
• These accessories or attachments are recommended
for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.
If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• SDS-Max Carbide-tipped bits
• SDS-Max bull point
• SDS-MAX cold chisel
• SDS-MAX scaling chisel
• SDS-MAX tile chisel
• SDS-MAX clay spade
• Hammer grease
• Bit grease
• Side handle
• Side grip
• Depth gauge
• Blow-out bulb
• Safety goggles
• Carrying case
NOTE:
• Some items in the list may be included in the tool
package as standard accessories. They may differ from
country to country.
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