Hitachi WH9DMR-TF [7/74] English
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Hitachi WH9DMR-TF [7/74] English

Hitachi WH9DMR-TF [7/74] English
English
6
(2) Regarding the temperatures of the rechargeable
battery
The temperatures for rechargeable batteries are as
shown in the table below, and batteries that have
become hot should be cooled for a while before
being recharged.
Table 2 Recharging ranges of batteries
4. Disconnect the charger’s power cord from the
receptacle
5. Hold the charger firmly and pull out the battery
NOTE
Be sure to pull out the battery from the charger after
use, and then keep it.
CAUTION
䡬 If the battery is charged while it is heated because it
has been left for a long time in a location subject to
direct sunlight or because the battery has just been
used, the pilot lamp of the charger lights up green. In
such a case, first let the battery cool, then start
charging.
䡬 When the pilot lamp flikers in red quickly (at 0.2-
second intervals), check for and take out any foreign
objects in the charger’s battery installation hole. If
there are no foreign objects, it is probable that the
battery or charger is malfunctioning. Take it to your
Authorized Service Center.
䡬 Since the built-in micro computer takes about 3
seconds to confirm that the battery being charged
with UC14YFA and UC24YFA are 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.
〈UC18YG〉
Before using the impact driver or impact wrench, charge
the battery as follows.
1. Connect the charger power cord to the receptacle
Connecting the power cord will turn on the charger.
2. Insert the battery into the charger
Insert the battery firmly while observing its direction,
until it contacts the bottom of the charger (the pilot
lamp lights up).
CAUTION
If the pilot lamp does not light up, pull out the
power cord from the receptacle and check the
battery mounting condition.
About 60 minutes is required to fully charge the
battery at a temperature of about 20°C. The pilot
lamp goes off to indicate that the battery is fully
charged.
The battery charging time becomes longer when a
temperature is low or the voltage of the power source
is too low.
When the pilot lamp does not go off even if m ore
than 120 minutes have elapsed after starting of the
charging, stop the charging and contact your HITACHI
AUTHORIZED SERVICE CENTER.
Temperatures at
Rechargeable batteries which the battery
can be recharged
Ni-Cd batteries –5°C – 60°C
Ni-MH batteries 0°C – 45°C
CAUTION
If the battery is heated due to direct sunlight, etc.,
just after operation, the charger pilot lamp may
not light up. At that time, cool the battery first,
then start charging.
3. Disconnect the charger power cord from the
receptacle
4. Hold the charger tight and pull out the battery
Regarding electric discharge in case of new
batteries, etc.
As the internal chemical substance of new batteries
and batteries that have not been used for an extended
period is not activated, the electric discharge might
be low when using them the first and second time.
This is a tem porary phenomenon, and normal time
required for recharging will be restored by recharging
the batteries 2 – 3 times.
How to make the batteries perform longer
(1)Recharge the batteries before they become
completely exhausted.
When you feel that the power of the tool becom es
weaker, stop using the tool and recharge its battery.
If you continue to use the tool and exhaust the electric
current, the battery may be damaged and its life w ill
become shorter.
(2) Avoid recharging at high temperatures.
A rechargeable battery will be hot immediately after
use. If such a battery is recharged immediately after
use, its internal chemical substance will deteriorate,
and the battery life will be shortened. Leave the
battery and recharge it after it has cooled for a while.
PRIOR TO OPERATION
1. Preparing and checking the work environment
Make sure that the work site meets all the conditions
laid forth in the precautions.
2. Checking the battery
Make sure that the battery is installed firmly. If it is at
all loose it could come off and cause an accident.
3. Installing the bit (Impact driver)
Always follow the following procedure to install driver
bit (Fig. 2).
(1) Pull the guide sleeve 7 away from front of the tool.
(2) Insert the bit 9 into the hexagonal hole in the anvil 8.
(3) Release the guide sleeve 7 and it returns to its original
position.
CAUTION
If the guide sleeve does not return to its original
position, then the bit is not installed properly.
4. Selecting the socket matched to the bolt
(Impact wrench)
Be sure to use a socket which is matched to the bolt
to be tightened. Using an im proper socket will not
only result in insufficient tightening but also in
damage to the socket or nut.
A worn or deformed hex. or square-holed socket will
not give an adequate tightness for fitting to the nut or
anvil, consequently resulting in loss of tightening
torque.
Pay attention to w ear of socket hole, and replace
before further wear has developed.

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English 2 Regarding the temperatures of the rechargeable battery The temperatures for rechargeable batteries are as shown in the table below and batteries that have become hot should be cooled for a while before being recharged Table 2 Recharging ranges of batteries Rechargeable batteries 4 Temperatures at which the battery can be recharged Ni Cd batteries 5 C 60 C Ni MH batteries 0 C 45 0 Disconnect the charger s power cord from the receptacle 5 Hold the charger firmly and pull out the battery NOTE Be sure to pull out the battery from the charger after use and then keep it CAUTION O If the battery is charged while it is heated because it has been left for a long time in a location subject to direct sunlight or because the battery has just been used the pilot lamp of thecharger lights up green In such a case first let the battery cool then start charging O When the pilot lamp flikers in red quickly at 0 2second intervals check for and take out any foreign objects in the charger s battery installation hole If there are no foreign objects it is probable that the battery or charger is malfunctioning Take it to your Authorized Service Center O Since the built in micro computer takes about 3 seconds to confirm that the battery being charged with UC14YFA and UC24YFA are 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 UC18YG Before using the impact driver or impact wrench charge the battery as follows 1 Connect the charger power cord to the receptacle Connecting the power cord will turn on the charger 2 Insert the battery Into the charger Insert the battery firmly while observing its direction until it contacts the bottom of the charger the pilot lamp lights up CAUTION If the pilot lamp does not light up pull out the power cord from the receptacle and check the battery mounting condition About 60 minutes is required to fully charge the battery at a temperature of about 20 C The pilot lamp goes off to indicate that the battery is fully charged The battery charging time becomes longer when a temperature is low or the voltage of the power source is too low When the pilot lamp does not go off even if more than 120 minutes have elapsed after starting of the charging stop thecharging and contactyour HITACHI AUTHORIZED SERVICE CENTER CAUTION If the battery is heated due to direct sunlight etc just after operation the charger pilot lamp may not light up At that time cool the battery first then start charging 3 Disconnect the charger power cord from the receptacle 4 Hold the charger tight and pull out the battery Regarding electric discharge in case of new batteries etc As the internal chemical substance of new batteries and batteries that have not been used for an extended period is not activated the electric discharge might be low when using them the first and second time This is a temporary phenomenon and normal time required for recharging will be restored by recharging the batteries 2 3 times How to make the batteries perform longer 1 Recharge the batteries before they become completely exhausted When you feel that the power of the tool becomes weaker stop using the tool and recharge its battery If you continue to use the tool and exhaust the electric current the battery may be damaged and its life will become shorter 2 Avoid recharging at high temperatures A rechargeable battery will be hot immediately after use If such a battery is recharged immediately after use its internal chemical substance will deteriorate and the battery life will be shortened Leave the battery and recharge it after it has cooled for awhile PRIOR TO OPERATION 1 Preparing and checking the work environment Make sure that the worksite meets all the conditions laid forth in the precautions 2 Checking the battery Make sure that the battery is installed firmly If it is at all loose it could come off and cause an accident 3 Installing the bit Impact driver Always follow the following procedure to install driver bit Fig 2 1 Pull the guide sleeve away from front of the tool 2 Insert the bit into the hexagonal hole in the anvil 3 Release the guide sleeve and it returns to its original positi on CAUTION If the guide sleeve does not return to its original position then the bit is not installed properly 4 Selecting the socket matched to the bolt Impact wrench Be sure to use a socket which is matched to the bolt to be tightened Using an improper socket will not only result in insufficient tightening but also in damage to the socket or nut A worn or deformed hex or square holed socket will not give an adequate tightness for fitting to the nut or anvil consequently resulting in loss of tightening torque Pay attention to wear of socket hole and replace before further wear has developed 6

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