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12
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 firmly install the socket in the anvil. If the socket is not firmly installed it might come out and
cause injuries.
7. Confirm that the battery is mounted correctly
8. Check the rotational direction
The bit rotates clockwise (viewed from the rear side) by pushing the R-
side of the push button.
The L-side of the push button is pushed to turn the bit counterclockwise.
(See Fig. 12)
CAUTION:
●
The push button can not be switched while the impact driver is turning.
To switch the push button, stop the impact driver, then set the push
button.
R
L
Fig. 12
Push button
Push Push
9. Switch operation
⅜
When the trigger switch is depressed, the tool rotates. When the trigger is released, the tool stops.
⅜
The rotational speed can be controlled by varying the amount that the trigger switch is pulled. Speed is low
when the trigger switch is pulled slightly and increases as the trigger switch is pulled more.
NOTE:
A buzzing noise is produced when the motor is about to rotate; this is only a noise, not a machine
failure.
10. Change rotation speed
As shown in Fig.13, when the rotation switch-over lever is slid to the
lower side, the power mode (P) is set. And when slid to upper side, the
save mode (S) is set.
Please use the save mode (S) when you want to lower Maximum
tightening torque.
CAUTION:
●
In the work of the save mode (S), avoid the continuous screw-tightening
as temperature of electronic components of the converter switch
increases.
11. Tightening and loosening screws
Install the bit that matches the screw, line up the bit in the grooves of the head of the screw, then tighten it.
Push the impact driver just enough to keep the bit fitting the head of the screw.
CAUTION:
●
Applying the impact driver for too long tightens the screw too much and can break it.
●
Tightening a screw with the impact driver at an angle to that screw can damage the head of the screw and
the proper force will not be transmitted to the screw.
Tighten with this impact driver lined up straight with the screw.
12. Tightening and loosening bolts
A hex. socket matching the bolt or nut must first 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 fitted 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.
CAUTION:
Do not touch the protector, as it gets very hot during continuous work.
2. Cautions on use of the speed control switch
This switch has a built-in, electronic circuit which steplessly varies the rotation speed. Consequently, when
the switch trigger is pulled only slightly (low speed rotation) and the motor is stopped while continuously
driving in screws, the components of the electronic circuit parts may overheat and be damaged.
Fig. 13
Power
mode (P)
Save
mode (S)
Rotation
switch-over
lever