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○ Impact rate cannot be adjusted until a battery is
installed to the power tool and the switch has been
triggered once.
○ While the tool's motor is operating, impact rate cannot
be adjusted by pressing the impact rate selector switch.
To adjust impact rate, switch off the tool.
Once the motor has stopped, press the impact rate
selector switch to adjust the impact rate.
*2 Operate this Demolition Hammer by utilizing its empty
weight. The performance will not be better even if it is
pressed or thrust forcibly against the work surface.
Hold this Demolition Hammer with a force just sufficient
to counteract the reaction.
*3 For detailed information regarding each tool, contact a
HiKOKI authorized service center.
Warming up (Fig. 13)
The grease lubrication system in this unit may require
warming up in cold regions.
Position the end of the bit so makes contact with the
concrete, turn on the switch and perform the warming up
operation. Make sure that a hitting sound is produced and
then use the unit.
ABOUT THE PROTECTION
FUNCTIONS
This product features functions that are designed to protect
the tool itself as well as the battery. While the switch is
pulled, if any of the safeguard functions are triggered during
operation, the display lamp will blink as described in
Table 3. When any of the safeguard functions are
triggered, immediately remove your finger from the switch
and follow the instructions described under corrective
action.
Display lamp
flashing
Internal
temperature has
Flash
risen beyond the
unit's specified
temperature.
(Temperature
increase
protection
function)
Excessive
pressure applied
Flash
to the tool has
resulted in an
overload.
(Overload
protection
function)
Flash
Sensor signal
read error.
(Control
monitoring
function)
Table 3
Cause
Solution
Turn off the unit
and allow it to
cool down for
about 15 to
30 minutes.
When the
temperature
goes down,
press the impact
rate selector
switch to
recover.
Press the impact
rate selector
switch to
recover. Try to
avoid tasks that
will apply excess
pressure to the
unit.
Press the impact
rate selector
switch to
recover. Repair
may be required
if this error
continuously
occurs.
GREASE REPLACEMENT
This Demolition Hammer is of full air-tight construction to
protect against dust.
Therefore, this Demolition Hammer can be used without
lubrication for long periods. Replace the grease as
described below.
Grease Replacement Period
After purchase, replace grease after every 6 months of
usage. Ask for grease replacement at the nearest
authorized Service Center.
MAINTENANCE AND INSPECTION
CAUTION
Be sure to turn off the switch and remove the battery
before maintenance and inspection.
1. Inspecting the tool
Since use of as dull tool will degrade efficiency and
cause possible motor malfunction, sharpen or replace
the tool as soon as abrasion is noted.
2. Inspecting the mounting screws
Regularly inspect all mounting screws and ensure that
they are properly tightened. Should any of the screws
be loose, retighten them immediately. Failure to do so
could result in serious hazard.
3. Maintenance of the motor
The motor unit winding is the very "heart" of the power
tool. Exercise due care to ensure the winding does not
become damaged and/or wet with oil or water.
4. Inspection of terminals (tool and battery)
Check to make sure that swarf and dust have not
collected on the terminals.
On occasion check prior, during and after operation.
CAUTION
Remove any swarf or dust which may have collected on
the terminals.
Failure to do so may result in malfunction.
5. Cleaning on the outside
When the power tool is stained, wipe with a soft dry
cloth or a cloth moistened with soapy water. Do not use
chloric solvents, gasoline or paint thinner, for they melt
plastics.
6. Cleaning the battery installation compartment and
the battery
After demolishing concrete, if concrete dust has
accumulated on the battery installation compartment
and the battery, clean off the accumulated concrete
dust with an air gun or a dry cloth before using the tool.
(Fig. 15)
Also, after cleaning, ensure that the battery can be
installed and removed smoothly from the tool.
CAUTION
Using the tool when the battery is covered with concrete
dust may lead to accidents such as the battery falling
during use.
Furthermore, such use may cause a malfunction or
contact failure between the battery and the terminals.
7. Storage
Store the power tool and battery in a place in which the
temperature is less than 40°C and out of reach of
children.
NOTE
Storing lithium-ion batteries.
Make sure the lithium-ion batteries have been fully
charged before storing them.
Prolonged storage (3 months or more) of batteries with
a low charge may result in performance deterioration,
significantly reducing battery usage time or rendering
the batteries incapable of holding a charge.
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