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○ Since the built-in micro computer takes about 3
seconds to confi rm that the battery being charged with
charger is taken out, wait for a minimum of 3 seconds
before reinserting it to continue charging. If the battery
is reinserted within 3 seconds, the battery may not be
properly charged.
○ Check the voltage of the in-car power source when
the pilot lamp fl ickers in green (every 0.2 seconds)
continuously. (UC18YML2)
If the voltage is 12V or lower, it indicates that the car
battery has weakened and cannot be charged.
○ If the pilot lamp does not blink in red (every second) even
though the charger cord or cigarette lighter connecting
plug is connected to the power, it indicates that the
protection circuit of the charger may be activated.
Remove the cord or plug from the power and then
connect it again after 30 seconds or so. If this does
not cause the pilot lamp to blink in red (every second),
please take the charger to the Hitachi Authorized Service
Center.
MOUNTING AND OPERATION
Action
Removing and inserting the
battery
Charging
Installing / Removing the side
handle
Inserting SDS-plus drilling tools
Removing SDS-plus drilling tools
Selecting rotation direction
Selecting the operating mode
Adjusting the drilling depth
Selecting the Save/Power mode
Switch operation
Remaining battery indicator
How to use the LED light
Check and replacing the carbon
brush
Selecting accessories*
* For detailed information regarding each tool, contact a
Hitachi authorized service center.
LUBRICATION
Low viscosity grease is applied to this rotary hammer so
that it can be used for a long period without replacing the
grease. Please contact the nearest service center for grease
replacement when any grease is leaking form loosened
screw.
Further use of the rotary hammer despite the grease
shortage causes damage to reduce the service life.
CAUTION
A specifi c grease is used with this machine, therefore,
the normal performance of the machine may be badly
aff ected by use of diff erent grease. Please be sure to let
one of our service centers to undertake replacement of
the grease.
MAINTENANCE AND INSPECTION
CAUTION
1. Inspecting the tool
2. Inspecting the mounting screws
3. Maintenance of the motor
4. Inspecting the carbon brushes (Fig. 13)
Figure
Page
1
184
NOTE
2
184
5. Replacing carbon brushes (Fig. 13)
3
184
4
184
5
185
6
185
7
185
8
185
CAUTION
9
185
10
185
11
186
12
186
6. Cleaning on the outside
13
186
―
187, 188
7. Storage
NOTE
NOTE
7
Be sure to turned off the switch and remove the battery
before maintenance and inspection.
Since use of as dull tool will degrade effi ciency and
cause possible motor malfunction, sharpen or replace
the tool as soon as abrasion is noted.
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.
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.
The motor employs carbon brushes which are
consumable parts. Since and excessively worn carbon
brush can result in motor trouble, replace the carbon
brush with new ones when it becomes worn to or near
the "wear limit" ⓐ. In addition, always keep carbon
brushes clean and ensure that they slide freely whithin
the brush holders.
When replacing the carbon brush with a new one, be
sure to use the Hitachi Carbon Brush Code No. 999100.
Take out the carbon brush by fi rst removing the brush
cap and then hooking the protrusion of the carbon brush
with a fl at head screw driver, etc.
When installing the carbon brush, choose the direction
so that the nail ⓑ of the carbon brush agrees with the
contact portion ⓒ outside the brush tube. Then push it in
with a fi nger. Lastly, install the brush cap.
Be absolutely sure to insert the nail of the carbon brush
into the contact portion outside the brush tube. (You can
insert whichever one of the two nails provided).
Caution must be exercised since any error in this
operation can result in the deformed nail of the carbon
brush and may cause motor trouble at an early stage.
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.
Store the power tool in a place in which the temperature
is less than 40°C and out of reach of children.
Make sure that the battery is fully charged when stored
for a long period (3 months or more). The battery with
smaller capacity may not be able to be charged when
used, if stored for a long period.
Storing lithium-ion batteries.
Make sure the lithium-ion batteries have been fully
charged before storing them.
Prolonged storage of batteries with a low charge
may result in performance deterioration, signifi cantly
reducing battery usage time or rendering the batteries
incapable of holding a charge.
However, signifi cantly reduced battery usage time may
be recovered by repeatedly charging and using the
batteries two to fi ve times.
If the battery usage time is extremely short despite
repeated charging and use, consider the batteries dead
and purchase new batteries.
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