Rotarv Hammer
45
mm
I
(1-3/4")
MODEL
HR4500C
INSTRUCTION MANUAL
SPECIFICATIONS
Capacities
Tungsten-carbide bit
*
Manufacturer reserves the right
*
Note: Specifications may differ from country to country.
WARNING: For your personal safety, READ and UNDERSTAND before using
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE.
1
Core bit
No
load speed
IRPMI
to
change specifications without notice.
per
Blows
minute
1
DOUBLE
INSULATION
Overall
length I weight
Net
GENERAL SAFETY RULES
(For
WARNING!
to follow
shock, fire and/or serious personal injury.
Read and understand all instructions. Failure
all
instructions listed below, may result
All
Tools)
in
electric
USA0021
SAVE
Work Area
1.
Keep your work area clean and well
accidents.
2.
Do not operate power tools
of flammable liquids, gases, or dust. Power tools create sparks which may
ignite the dust or fumes.
3.
Keep bystanders, children, and visitors away while operating a power tool.
Distractions can cause you to lose control.
Electrical Safetv
4.
Double Insulated tools are equipped with a polarized plug (one blade
than the other.) This plug
plug does not fit fully
contact a qualified electrician to install a polarized outlet. Do not change
the plug
wire grounded power cord and grounded power supply system.
Avoid body contact
5.
and refrigerators. There is an increased risk of electric shock if your body
grounded.
Do not expose power tools to rain or wet conditions. Water entering a power
6.
tool
will
7.
Do not abuse the cord. Never use the cord to carry the tools or pull the plug
from an outlet. Keep cord away from heat, oil, sharp edges or moving parts.
Replace damaged cords immediately. Damaged cords increase the risk
electric shock.
8.
When operating a power tool outside, use an outdoor extension cord marked
“W-A‘ or “W.” These cords are rated for outdoor use and reduce the risk
of
electric shock.
Personal Safety
9.
Stay alert, watch what
a power tool. Do not use tool while tired or under the influence of drugs,
alcohol,
may result
IO.
Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep
your hair, clothing, and gloves away from moving parts. Loose clothes, jewelry
or long hair can be caught
THESE
in
the outlet, reverse the plug.
in
any way. Double insulation
with
grounded surfaces such as pipes, radiators, ranges
increase the risk of electric shock.
you
or
medication. A moment of inattention while operating power tools
in
serious personal injury.
INSTRUCTIONS
lit.
Cluttered benches and dark areas invite
in
explosive atmospheres, such as
will
fit
in
a polarized outlet only one way. If the
I3
eliminates the need for the three
are doing and use common sense when operating
in
moving parts.
in
If
it
still does not
the presence
is
wider
fit,
is
of
2
11.
Avoid accidental starting. Be sure switch
tools with your finger on the switch or plugging in tools that have the switch
on invites accidents.
12. Remove adjusting keys or wrenches before turning the tool on. A wrench
or a key that is left attached to a rotating part of the tool may result
injury.
13.
Do
not overreach. Keep proper footing and balance at all times. Proper footing
balance
and
14.
Use safety equipment. Always wear eye protection. Dust mask, non-skid
safety shoes, hard hat, or hearing protection must be used for appropriate
conditions.
Tool
Use and Care
15. Use clamps or other practical way to secure and support the workpiece to
a stable platform. Holding the work by hand or against your body is unstable
and may lead to loss of control.
16. Do not force tool. Use the correct tool for your application. The correct tool
will
do the job better and safer at the rate for which
17.
Do
not use tool if switch does not turn
be controlled
18.
Disconnect the plug from the power source before making any adjustments,
changing accessories, or storing the tool. Such preventive safety measures
reduce the risk of starting the tool accidentally.
19.
Store idle tools out of reach of children and other untrained persons.
are dangerous
20.
Maintain tools with care. Keep cutting tools sharp and clean. Properly
maintained tools,
to control.
21. Check for misalignment or binding of moving parts, breakage
any other condition that may affect the tools operation. If damaged, have
the tool serviced before using. Many accidents are caused
maintained tools.
22.
Use only accessories that are recommended by the manufacturer for your
model. Accessories that may be suitable for one tool, may become hazardous
when used on another tool.
S
ERVl
CE
23.
Tool
service must be performed only by qualified repair personnel. Service
or maintenance performed by unqualified personnel could result
injury.
24.
When servicing a tool, use only identical replacement parts. Follow
instructions
parts or failure to follow Maintenance Instructions may create a risk of electric
shock or injury.
enables
with
in
the Maintenance section of this manual.
better
control
the switch is dangerous and must be repaired.
in
the hands of untrained users.
with
sharp cutting edges are less likely to bind and are easier
of
is
off
before
the
tool in
it
on or off. Any tool that cannot
plugging
unexpected
it
is designed.
in.
situations.
of
in
Use
of unauthorized
Carrying
in
personal
Tools
parts, and
by
poorly
a risk of
3
Specific Safety Rules
1.
Hold tools by insulated gripping surfaces when performing an operation
where
with
the operator.
2.
Wear ear protectors when using the tool for extended periods. Prolonged
exposure to
3.
Wear a hard hat (safety helmet), safety glasses and/or face shield.
highly recommended 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,
tool warm up for a while by operating
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
11.
Do
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.
the
cutting tool may contact hidden wiring or its own cord. Contact
a "live" wire
not point the tool at any one in the area when operating. The bit could
will
make exposed metal parts
high
intensity noise can cause hearing
it
of
the tool "live" and shock
loss.
under no load. This will loosen up
the
tool only when hand-held.
USBOlO
It
is also
let
the
1
SAVE THESE INSTRUCTIONS.
4
SYMBOLS
The followings
V
A
Hz
%
n,
El
..
./min
LI=,
.................................
.................................
.................................
.................................
.................................
.................................
................................
.................................
show
the symbols
volts
amperes
herts
alternating current
no load speed
Class
revolutions or reciprocation per minute
number
used
for
II
Construction
of
blow
tool.
5
FUNCTIONAL DESCRIPTION
Selecting
Rotation with hammering
For drilling in concrete, masonry, etc.,
depress the lock button and rotate the
change lever
the symbol. Use
tipped bit.
action
mode
so
that the pointer points to
a
tungsten carbide-
Jy
Pointer
Hammering only
For chipping, scaling or demolition operations, depress the lock button and rotate the
so
change lever
scaling chisel, etc.
Change lever
I
CAUTION:
Do
not rotate the change lever when the tool is running under load. The tool
aged.
*To avoid rapid wear on the mode change mechanism, be sure that the change lever is
always positively located in one
that the pointer points to the symbol.
1
rPointer
of
the two action mode positions.
I
Use
E1
a
bull point, cold chisel,
will
be dam-
The bit can be secured
To
angles.
the lock button and rotate the change lever
so
that the pointer points to the o symbol.
Turn the bit to the desired angle.
6
change the bit angle, depress
at
16
different
Lock
button
Change lever
?ea
Pointer
Depress
change lever
the symbol. Then make sure that the bit
is securely held in place
ly.
Side
CAUTION:
Use the side handle only when chipping,
scaling or demolishing.
drilling in concrete, masonry, etc. The tool
cannot be held properly with this side handle when drilling.
the
handle
lock button
so
that the pointer points to
by
Do
and
turning
not
use
rotate the
it
it
slight-
when
Change lever
Pointer
-,
The side handle can be swung
vertical and secured at any desired position.
It
also secures at eight different positions
back and forth on the horizontal. Just
loosen the clamp nut to swing the side han-
a
dle to
clamp nut securely.
Side
CAUTION:
Always use the side grip
etc.
The side grip swings around
allowing easy handling
position. Loosen the side grip by turning it
counterclockwise, swing
position and then tighten
wise.
desired position. Then tighten the
grip
360"
on the
to
ensure operating safety when drilling in concrete, masonry,
to
either side,
of
the tool in any
it
to the desired
it
by turning
clock-
Tighten
7
Switch action
CAUTION:
Before plugging in the tool, always check
to see that the switch trigger actuates
properly and returns to the
"OFF"
position
when released.
To start the tool, simply pull the trigger.
Release the trigger to stop.
Speedchange
The revolutions and blows per minute can be adjusted just by turning the adjusting dial.
The dial is marked 1 (lowest speed) to
6
(full speed). Refer to the table below for
the relationship between the number settings on the adjusting dial and the revolutions/blows per minute.
Number
on
adjusting dial
6
5
4
3
2
1
Revolutions
per minute per minute
240 2,550
230 2,450
200 2,100
160
130 1,300
120
Blows
1,700
1.250
Adjusting dial
-
Depth gauge
The depth gauge is convenient for drilling
holes of uniform depth. Loosen the clamp
screw and adjust the depth gauge to the
Clamp
screw
7
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 gear housing/motor housing.
8
indicator
The green power-ON indicator lamp lights up when the
cator lamp is lit but the
the carbon brushes may be worn out, or
the electric circuit or the motor may be
defective. If the indicator lamp does not
light up and the tool does not start, the
ON/OFF
defective.
The red service indicator lamp lights up
when the carbon brushes are nearly worn
out to indicate that the tool needs servicing.
After approx.
automatically be shut off.
ASSEMBLY
Installing or removing bit
CAUTION:
Always be sure that the tool is switched off and unplugged before installing
the bit.
Clean the bit shank and apply the bit grease
provided to
lamp
tool
does not start,
switch or the mains cord may be
8
hours of use, the motor will
it
before installing the bit.
tool
is
switched
Service
indicator lamp
TPower-ON indlcator lamp (green)
ON.
If
the
or
removing
indi-
Insert the bit into the
push
it
in until
it
engages.
tool.
Turn the bit and
-
Bit shank
9
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.
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
all
cover down
the way and pull the bit out.
10
OPERATION
Hammer drilling operation
Set the change lever to theufl
Position the bit at the location for the hole,
then pull the 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
Instead, run the tool at an idle, the remove
from the hole.
times, the hole will be cleaned out.
CAUTION:
When the bit begins to break through concrete or
bedded in concrete, the tool may react dangerously. Maintain good balance and safe footing while holding the
By
repeating this several
tool
firmly with both hands to prevent dangerous reaction.
symbol.
or
particles.
if
the bit strikes reinforcing rods em-
Torque limiter
The torque limiter
gage from the output shaft. When this happens, the bit will stop turning.
CAUTION:
As soon as the torque limiter actuates, switch off the tool immediately. This will help prevent premature weak of the tool.
will
actuate when a certain torque level is reached. The motor will disen-
C
hipping/Scaling/Demolition
Set the change lever to the symbol. Hold
the tool firmly with both hands. Turn the
tool on and apply slight pressure on the tool
so
that the
uncontrolled. Pressing very hard on the tool
will not increase the efficiency.
tool
will not bounce around,
11
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and unplugged before attempting to perform
inspection or maintenance.
Replacing carbon brushes
When the resin insulating tip inside the car-
is
bon brush
mutator,
motor. When this occurs, both carbon
brushes should be replaced
time. Use only identical carbon brushes.
exposed to contact the com-
it
will automatically shut off the
at
the same
7r
Insulating
tip
a
Use
holder cover.
Use a screwdriver to remove the brush
holder caps. Take out the worn carbon
brushes, insert the new ones and secure
the brush holder caps.
screwdriver to remove the brush
1
Screwdriver
K
Carbon brush
Screwdriver
Brush holder cover
12
Brush holdei
Lubrication
CAUTION:
This servicing should be performed by Makita Authorized or Factory Service Centers only.
This tool required no hourly or daily lubrication because
it
has a grease-packed lubrication system. It should be relubricated
after every
6
months of operation. Send the
complete tool to Makita Authorized or
Factory Service Center for this lubrication
Screws
-
service. However, if circumstances require
that you should lubricate it by yourself, proceed as follows.
Run the
tool
for several minutes to warm
it
up. Switch off and unplug the tool.
Loosen the six screws and remove the handle. Note that the top screws are different
from other screws.
Disconnect the connector by pulling it
Remove the crank cap using
a
hex wrench.
Cramp capI
I
Hex
wrench
13
Rest the tool on the table with the bit end pointing upwards. This will allow the old grease
to
collect inside the crank housing. Wipe out the old grease inside and replace with a fresh
(60
grease
more than the specified amount of grease (approx.
9). Use only Makita genuine hammer grease (optional accessory). Filling with
60
g) can cause faulty hammering
action or machine failure. Fill only with the specified amount of grease. Reinstall the crank
cap and tighten with the hex wrench.
Connect the connector and reinstall the handle.
Hammer grease
.
White
CAUTION:
Be careful not to damage the terminal or lead wires especially when wiping out the old
grease of installing the handle.
Do
not tighten the crank cap excessively.
It
is made of resin and is subject to breakage.
To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjust-
ment should be performed by Makita Authorized or Factory Service Centers, always using
Makita replacement parts.
14
ACCESSORIES
CAUTION
These accessories
manual The use
The accessories or attachments should be used only in the proper and intended manner
or
attachments are recommended
of
any other accessories or attachments might present
for
use with your Makita
a
risk
tool
of
specified in this
injury
to
persons
Safety goggle
Part
No.
191
-
Side handle
Part
No
13491
Side grip
Part
No.
13491 6-8
Depth gauge
Part
No.
321
686-2
5-0
248-4
Bit grease
Part
No.
(100
181 573-3
g)
-
Hammer grease
Part
No.
181 490-7
Carrying case
Part
No.
824607-6
(30
gl
15
WARNING
Some dust created by power sanding, sawing, grinding, drilling, and other
construction activities contains chemicals known [to the State of California] to
cause cancer, birth defects or other reproductive harm. Some examples of
these chemicals are:
0
Lead from lead-based paints,
0
Crystalline silica from bricks and cement and other masonry products, and
0
Arsenic and chromium from chemically-treated lumber.
Your risk from these exposures varies, depending on how often you
To
type of work.
reduce your exposure to these chemicals: work in a well
do
this
ventilated area, and work with approved safety equipment, such as those
to
dust masks that are specially designed
MAKITA
Every Makita tool is thoroughly inspected and tested before leaving the factory. It is warranted to
be free of defects from workmanship and materials for the period of ONE YEAR from the date
original purchase. Should any trouble develop during this one-year period, return the COMPLETE
tool, freight prepaid, to one of Makita’s Factory or Authorized Service Centers. If inspection shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
This Warranty does not apply where:
repairs have been made or attempted by others:
repairs are required because of normal wear and tear:
The tool has been abused, misused or improperly maintained;
alterations have been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES FROM THE SALE OR USE OF THE PRODUCT. THIS DISCLAIMER
APPLIES BOTH DURING AND AFTER THE TERM OF THlS WARRANTY.
MAKITA
DISCLAIMS
WARRANTIFS
AFTER THE ONE-YFAR TtRM OF THIS WARRANTY
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. Some states do not allow the exclusion or Limitation of incidental or consequential
damages,
limitation on how
OF
so
the above limitation or exclusion may not apply to you.
LIMITED
LIABILITY
“MFRCHANTABILITY” AND “CITNtSS
long
an implied warranty lasts,
ONE YEAR WARRANTY
Warranty Policy
wn
ANY
filter out microscopic particles.
IhwLitD
WARRANTIES.
so
the above limitation may not apply to you.
INCLUDIVG
I
OR
A
SPFClClC PURPOSL.”
Some states do not allow
P
of
IMPLILD
Makita Corporation
3-11
-8,
Sumiyoshi-cho,
Anjo, Aichi 446-8502 Japan
aa4367~064
PRINTED IN JAPAN
2001
-7N
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