Functional Description; Torque Limiter - Makita HR3540C Instruction Manual

2. Be sure the bit is secured in place before
operation.
3. 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.
4. 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.
5. Always be sure you have a firm footing. Be sure
no one is below when using the tool in high
locations.
6. Hold the tool firmly with both hands.
7. Keep hands away from moving parts.
8. Do not leave the tool running. Operate the tool
only when hand-held.
9. Do not point the tool at any one in the area when
operating. The bit could fly out and injure
someone seriously.
10. Do not touch the bit, parts close to the bit, or
workpiece immediately after operation; they may
be extremely hot and could burn your skin.
11. Some material contains chemicals which may be
toxic. Take caution to prevent dust inhalation and
skin contact. Follow material supplier safety data.
12. Do not touch the power plug with wet hands.
SAVE THESE INSTRUCTIONS.
WARNING:
DO NOT let comfort or familiarity with product (gained
from repeated use) replace strict adherence to safety
rules for the subject product. MISUSE or failure to
follow the safety rules stated in this instruction
manual may cause serious personal injury.

FUNCTIONAL DESCRIPTION

CAUTION:
• Always be sure that the tool is switched off and
unplugged before adjusting or checking function on the
tool.
Switch action (Fig. 1)
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 switch trigger. Release the
switch trigger to stop.
Lighting up the lamp
For Model HR3541FC (Fig. 2)
CAUTION:
• Do not look in the light or see the source of light
directly.
Pull the switch trigger to turn on the light. The lamp keeps
on lighting while the switch trigger is being pulled.
The lamp turns off 10 - 20 seconds after releasing the
trigger.
6
NOTE:
• Use a dry cloth to wipe the dirt off the lens of lamp.
Be careful not to scratch the lens of lamp, or it may
lower the illumination.
Speed change (Fig. 3)
The revolutions and blows per minute can be adjusted just
by turning the adjusting dial. The dial is marked 1 (lowest
speed) to 5 (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 Revolutions per
adjusting dial
5
4
3
2
1
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)
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.
Rotation only (Fig. 5)
For drilling in wood or metal, materials, etc., depress the
lock button and rotate the change lever so that the pointer
points to the symbol. Use a twist drill bit or wood bit.
Hammering only (Fig. 6)
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.
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 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.
CAUTION:
• As soon as the torque limiter actuates, switch off the
tool immediately. This will help prevent premature wear
of the tool.
Blows per minute
minute
630 3,300
590 3,100
480 2,500
370 1,900
315 1,650