Prior To Operation; Operational Cautions - Hitachi WR18DSHL Handling Instructions Manual

English
○ When the pilot lamp fl ickers in red (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.

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 fi rmly. If it is at all
loose it could come off and cause an accident.
3. Selecting the socket matched to the bolt
Be sure to use a socket which is matched to the bolt to be
tightened. Using an improper socket will not only result in
insuffi cient 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 fi tting 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.
4. Installing a socket
Select the socket to be used.
● Pin, O-ring type
(1) Align the hole in the socket with the hole in the anvil and
insert the anvil into the socket.
(2) Insert the pin into the socket.
(3) Attach the ring to the groove on the socket.
● Plunger type
Align the plunger located in the square part of the anvil
with the hole in the hex. socket. Then push the plunger,
and mount the hex. socket on the anvil.
Check that the plunger is fully engaged in the hole.
When removing the socket, reverse the sequence.
● Retaining ring type
(1) Align the square portions of the socket and the anvil with
each other.
(2) Make sure to fi rmly install the socket by pushing it all the
way into the anvil.
(3) When removing the socket, pull it out of the anvil.
CAUTION
○ Please use the designated attachments which are listed
in the operations manual and Hitachi's catalog.
Accidents or injuries could result from not doing so.
○ Make sure to fi rmly install the socket in the anvil. If the
socket is not fi rmly installed it might come out and cause
injuries.
HOW TO USE
1. Operation of switch
The switch in this machine functions as a motor switch
and rotational direction selector switch. When the switch
is set to indicated on the handle, the motor rotates
clockwise to tighten the bolt. When the switch is set to
the motor rotates counterclockwise to loosen the bolt.
When the switch is released, the motor stops. (Fig. 6)
CAUTION
Be sure to turn the switch OFF and wait until the motor
completely stops before changing the direction of wrench
revolution. Switching while the motor is rotating will result
in burning the motor.
2. About Remaining Battery Indicator
When pressing the remaining battery indicator switch,
the remaining battery indicator lamp lights and the
battery remaining power can be checked. (Fig. 7)
8
When releasing your fi nger from the remaining battery
indicator switch, the remaining battery indicator lamp
goes off . The Table 4 shows the state of remaining
battery indicator lamp and the battery remaining power.
State of lamp Battery Remaining Power
The battery remaining power is enough.
The battery remaining power is a half.
The battery remaining power is nearly
empty.
Re-charge the battery soonest possible.
As the remaining battery indicator shows somewhat
diff erently depending on ambient temperature and
battery characteristics, read it as a reference.
NOTE:
○ Do not give a strong shock to the switch panel or break it.
It may lead to a trouble.
○ To save the battery power consumption, the remaining
battery indicator lamp lights while pressing the remaining
battery indicator switch.
3. How to use the LED light
Every time you press the light switch on the switch panel,
the LED light lights or goes off . (Fig. 8)
To prevent the battery power consumption, turn off the
LED light frequently.
CAUTION
Do not expose directly your eye to the light by looking into
the light.
If your eye is continuously exposed to the light, your eye
will be hurt.
NOTE:
To prevent the battery power consumption caused
by forgetting to turn off the LED light, the light goes off
automatically in about 15 minutes.
4. Tightening and loosening bolts
A hex. socket matching the bolt or nut must fi rst be
selected. Then mount the socket on the anvil, and grip
the nut to be tightened with the hex. socket. Holding the
wrench in line with the bolt, press the power switch to
impact the nut for several seconds.
If the nut is only loosely fi tted to the bolt, the bolt may turn
with the nut, therefore mistaking proper tightening. In this
case, stop impact on the nut and hold the bolt head with a
wrench before restarting impact, or manually tighten the
bolt and nut to prevent them slipping.

OPERATIONAL CAUTIONS

1. Resting the unit after continuous work
After use for continuous bolt-tightening work, rest the
, unit for 15 minutes or so when replacing the battery. The
temperature of the motor, switch, etc., will rise if the work
is started again immediately after battery replacement,
eventually resulting in burnout.
NOTE:
Do not touch the metal parts, as it gets very hot during
continuous work.
2. Work at a tightening torque suitable for the bolt
under impact
The optimum tightening torque for nuts or bolts diff ers with
material and size of the nuts or bolts. An excessively large
tightening torque for a small bolt may stretch or break the
bolt. The tightening torque increases in proportion to the
operation time. Use the correct operating time for the bolt.
Table 4