Operational Cautions - Hitachi WH 14DL2 Bedienungsanleitung

English
CAUTION
In the work of the save mode (S), avoid the continuous screw-tightening as
temperature of electronic components of the converter switch increases.
4. Tightening and loosening screws (WH14DL2 / WH18DL2)
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.
5. 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.
6. Using the hook
CAUTION
When using the hook, pay sufficient attention so that the main equipment
does not fall. If the tool falls, there is a risk of accident.
Do not attach the tip tool except phillips bit to the tool main unit when
carrying the tool main unit with the hook suspended from a waist belt.
Injury may result if you carry the equipment suspended from the waist belt
with sharp tipped components such as drill bit attached.
The hook can be installed on the right or left side and the angle can be adjusted in
5 steps between 0° and 80°.
(1) Operating the hook
(a) Pull out the hook toward you in the direction of arrow (A) and turn in
the direction of arrow (B). (Fig. 8)
(b) The angle can be adjusted in 5 steps (0°, 20°, 40°, 60°, 80°).
Adjust the angle of the hook to the desired position for use.
(2) Switching the hook position
CAUTION
Incomplete installation of the hook may result in bodily injury when used.
(a) Securely hold the main unit and remove the screw using a slotted head
screwdriver or a coin. (Fig. 9)
(b) Remove the hook and spring. (Fig. 10)
(c) Install the hook and spring on the other side and securely fasten with
screw. (Fig. 11)
NOTE
Pay attention to the spring orientation. Install the spring with larger diameter
away from you. (Fig. 11)
(3) Using the bit holder (Hook with bit holder)
Installing the bit
Slide the bit from the side, and then insert firmly until the groove on
the bit locks in the protruded section of the hook.
Removing the bit
Securely hold the main unit and pull out the bit by holding the tip with
your thumb. (Fig. 12)
CAUTION
Only Hitachi STANDARD ACCESSORIES phillips bit (No. 2 × 65L; Code No.
983006) may be used. Do not use other bits since they may come loose.
7. How to use the LED light
Pull the trigger switch to light up the light. The light keeps on lighting while
the trigger switch is being pulled. The light goes out after releasing the
trigger switch. (Fig. 13)
13
8. Using the bit holder
CAUTION
Stow the bit in the specified location on the tool. If the tool is used with the
bit stowed improperly, the bit may fall and cause bodily injury.
Do not stow bits that are of a different length, gauge or dimension than the
plus driver bit (65 mm long) included in the STANDARD ACCESSORIES.
The bit may fall and cause bodily injury.
(1) Removing the bit
Securely hold the main unit and pull out the bit by holding the tip with your
thumb. (Fig. 14)
(2) Installing the Bit
Install the bit with steps opposite of when removing. Insert the bit so that
the right and left sides are equal, as shown in Fig. 15.

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 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.
3. Use a tightening time suitable for the screw
The appropriate torque for a screw differs according to the material and size of
the screw, and the material being screwed etc., so please use a tightening time
suitable for the screw. In particular, if a long tightening time is used in the case of
screws smaller than M8, there is a danger of the screw breaking, so please
confirm the tightening time and the tightening torque beforehand.
4. Work at a tightening torque suitable for the bolt under impact
The optimum tightening torque for nuts or bolts differs 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 operaton time. Use the correct operating time for the bolt.
5. Holding the tool
Hold the impact wrench firmly with both hands. In this case hold the wrench
in line with the bolt.
It is not necessary to push the wrench very hard. Hold the wrench with a
force just sufficient to counteract the impact force.
6. Confirm the tightening torque
The following factors contribute to a reduction of the tightening torque. So
confirm the actual tightening torque needed by screwing up some bolts
before the job with a hand torque wrench. Factors affecting the tightening
torque are as follows.
(1) Voltage
When the discharge margin is reached, voltage decreases and tightening
torque is lowered.
(2) Operating time
The tightening torque increases when the operating time increases. But the
tightening torque does not increase above a certain value even if the tool is
driven for a long time.
(3) Diameter of bolt
The tightening torque differs with the diameter of the bolt. Generally a larger
diameter bolt requires larger tightening torque.
(4) Tightening conditions
The tightening torque differs according to the torque ratio; class, and length
of bolts even when bolts with the same size threads are used. The tightening
torque also differs according to the condition of the surface of workpiece
through which the bolts are to be tightened. When the bolt and nut turn
together, torque is greatly reduced.