Makita HR4040C Manual De Instrucciones página 9

Speed change (Fig. 15)
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 Revolutions per
adjusting dial
6
5
4
3
2
1
Hammer drilling operation (Fig. 16)
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.
Set the change lever to the
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 or particles. Instead, run the tool at an
idle, then remove from the hole. By repeating this several
times, the hole will be cleaned out.
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.
Chipping/Scaling/Demolition (Fig. 17)
Set the change lever to the
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.
Blows per
minute minute
450 2,500
430 2,350
370 2,050
310 1,700
250 1,400
230 1,250
h
symbol. Position the bit at
g
symbol. Hold the tool
Depth gauge (Fig. 18)
The depth gauge is convenient for drilling holes of uni-
form 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 gear housing/motor
housing.
Indicator lamp (Fig. 19)
The green power-ON indicator lamp lights up when the
tool is switched ON. If the indicator lamp is lit but the tool
does not start, 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 switch or the mains cord 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.
MAINTENANCE
CAUTION:
Always be sure that the tool is switched off and
unplugged before carrying out any work on the tool.
Replacement of carbon brushes (Fig. 20 & 21)
Whenever carbon brushes must be replaced, they cut out
the tool automatically. When this occurs, remove the
screws which secure the brush holder cover. Remove the
brush holder cover. Then replace both carbon brushes at
the same time. Use only identical carbon brushes.
Lubrication
This tool requires no hourly or daily lubrication because it
has a grease-packed lubrication system. Lubricate the
tool every time the carbon brushes are replaced.
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. (Fig. 22)
Disconnect the connector by pulling them. (Fig. 23)
Remove the crank cap using a hex wrench. (Fig. 24)
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 grease (30 g). Use only Makita genu- ine hammer grease (optional accessory). Filling with
more than specified amount of grease (approx. 30 g) can
cause faulty hammering action or tool failure. Fill only
with the specified amount of grease. Reinstall the crank
cap and tighten with the hex wrench. (Fig. 25)
Connect the connector and reinstall the handle. (Fig. 26)
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