Makita HR4501C Instruction Manual page 7

CAUTION:
If the tool is operated continuously at low speeds
•
for a long time, the motor will get overloaded,
resulting in tool malfunction.
The speed adjusting dial can be turned only as far
•
as 5 and back to 1. Do not force it past 5 or 1, or
the speed adjusting function may no longer work.
Selecting the action mode
Rotation with hammering
Fig.4
Fig.5
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
FOR MODEL HR4501C AND HR4510
Fig.6
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
chisel, scaling chisel, etc.
For long time hammering (FOR MODELS HR4501C
AND HR4510C ONLY)
Fig.7
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
chisel, scaling chisel, etc.
CAUTION:
When using the tool in the
•
switch trigger does not work and only the slide
switch works.
FOR MODEL HR4511C
Fig.8
For chipping, scaling or demolition operations, depress
the lock button and rotate the change lever so that the
pointer points to the
chisel, scaling chisel, etc.
CAUTION:
Do not rotate the change lever when the tool is
•
running under load. The tool will be damaged.
To avoid rapid wear on the mode change
•
mechanism, be sure that the change lever is
always positively located in one of the two or three
action mode positions.
Torque limiter
The torque limiter will actuate when a certain torque
level is reached. The motor will disengage from the
output shaft. When this happens, the bit will stop turning.
symbol. Use a bull point, cold
symbol. Use a bull point, cold
symbol mode, the
symbol. Use a bull point, cold
CAUTION:
As soon as the torque limiter actuates, switch off
•
the tool immediately. This will help prevent
premature wear of the tool.
Indicator lamp
Fig.9
The green power-ON indicator lamp lights up when the
tool is plugged. If the indicator lamp does not light up,
the mains cord or the controller may be defective. The
indicator lamp is lit but the tool does not start even if the
tool is switched on, the carbon brushes may be worn
out, or the controller, the motor or the ON/OFF switch
may be 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. 8 hours of use, the
motor will automatically be shut off.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the
tool.
Side handle
Fig.10
CAUTION:
Use the side handle only when chipping, scaling or
•
demolishing. Do not use it when drilling in
concrete, masonry, etc. The tool cannot be held
properly with this side handle when drilling.
The side handle can be swung 360° on the 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 handle to a
desired position. Then tighten the clamp nut securely.
Fig.11
Side grip
Fig.12
CAUTION:
Always use the side grip to ensure operating
•
safety when drilling in concrete, masonry, etc.
The side grip swings around to either side, allowing
easy handling of the tool in any position. Loosen the
side grip by turning it counterclockwise, swing it to the
desired position and then tighten it by turning clockwise.
Installing or removing the bit
Fig.13
Clean the bit shank and apply bit grease before
installing the bit.
Insert the bit into the tool. Turn the bit and push it in until
it engages.
7