20. Check damaged parts
Before further use of the tool, a guard or other part
that is damaged should be carefully checked to
determine that it will operate properly and perform
its intended function. Check for alignment of mov-
ing parts, binding of moving parts, breakage of
parts, mounting, and any other conditions that
may affect its operation. A guard or other part that
is damaged should be properly repaired or
replaced by an authorized service center unless
otherwise indicated elsewhere in this instruction
manual. Have defective switches replaced by and
authorized service center. Do not use tool if switch
does not turn it on and off.
21. Warning
The use of any other accessory or attachment
other than recommended in this operating instruc-
tion or the catalog may present a risk of personal
injury.
22. Have your tool repaired by an expert
This electric appliance is in accordance with the
relevant safety rules. Repairing of electric appli-
ances may be carried out only by experts other-
wise it may cause considerable danger for the
user.
ADDITIONAL SAFETY RULES FOR
TOOL
ENB010-1
1. Hold tools by insulated gripping surfaces
when performing an operation where the cut-
ting tool may contact hidden wiring or its own
cord. Contact with a ‘‘live’’ wire will make
exposed metal parts of the tool ‘‘live’’ and
shock the operator.
2. Wear ear protectors when using the tool for
extended periods. Prolonged exposure to high
intensity noise can cause hearing loss.
3. Wear a hard hat (safety helmet), safety glasses
and/or face shield. It is also highly recom-
mended that you wear a dust mask and thickly
padded gloves.
4. Be sure the bit is secured in place before
operation.
5. Under normal operation, the tool is designed
to produce vibration. The screws can come
loose easily, causing a breakdown or accident.
Check tightness of screws carefully before
operation.
6. In cold weather or when the tool has not been
used for a long time, let the tool warm up for a
while by operating it under no load. This will
loosen up the lubrication. Without proper
warm-up, hammering operation is difficult.
7. Always be sure you have a firm footing.
Be sure no one is below when using the tool in
high locations.
8. Hold the tool firmly with both hands.
9. Keep hands away from moving parts.
10. Do not leave the tool running. Operate the tool
only when hand-held.
11. Do not point the tool at any one in the area
when operating. The bit could fly out and
injure someone seriously.
12. Do not touch the bit or parts close to the bit
immediately after operation; they may be
extremely hot and could burn your skin.
SAVE THESE INSTRUCTIONS.
OPERATING INSTRUCTIONS
Accept SDS-top Bit
Installing or removing bit
Important:
Always be sure that the tool is switched off and
unplugged before installing or removing the bit.
Clean the bit shank and apply the bit grease provided
to it before installing the bit.
(Fig. 1)
Insert the bit into the tool. Turn the bit and push it in
until it engages.
(Fig. 2)
If the bit cannot be pushed in, remove the bit. Pull the
chuck cover down a couple of times. Then insert the
bit again. Turn the bit and push it in until it engages.
(Fig. 3)
After installing, always make sure that the bit is
securely held in place by trying to pull it out.
To remove the bit, pull the chuck cover down all the
way and pull the bit out.
(Fig. 4)
Selecting action mode
When selecting an action mode, first set the change
lever and the shift lever to the position shown in
Fig. 5
. Then proceed as follows.
Rotation with hammering (Fig. 6 & 7)
For drilling in concrete, masonry, etc., depress the
lock button and rotate the change lever so that the
pointer points to the
symbol. Use a tungsten-
carbide tipped bit.
Hammering only (Fig. 6 & 8)
For chipping, scaling or demolition operations,
depress the lock button and rotate the change lever
so that the pointer points to the
symbol. Use a bull
point, cold chisel, scaling chisel, etc.
Rotation only (Fig. 6 & 9)
For drilling in wood, metal or plastic materials, rotate
the shift lever so that the
symbol is aligned with the
pointer on the change lever. Use a twist drill bit or
wood bit.
CAUTION:
• Do not rotate the change lever and/or the shift lever
when the tool is running under load. The tool will be
damaged.
• To avoid rapid wear on the mode change mecha-
nism, be sure that the change lever and/or the shift
lever is always positively located in one of the three
action mode positions.
• The action mode cannot be changed directly from
‘‘hammering only’’ to ‘‘rotation only’’ or from ‘‘rotation
only’’ to ‘‘hammering only’’. First set the change
lever and the shift lever to ‘‘rotation with hammer-
ing’’ mode position shown in
Fig. 5
. Then set them
to the position for ‘‘hammering only’’ or ‘‘rotation
only’’.
HR3550C (E) (’100. 8. 29)
7
