HITACHI WH10DCL-TL - Инструкция по эксплуатации - Страница 11

9

English

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 bearing cover or impact mechanism
parts, as they get very hot during continuous work.
(

Fig. 6

)

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 operation time. Use
the correct operating time for the bolt.

5. 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.

MAINTENANCE AND INSPECTION

1. Inspecting the driver bit

Using a broken bit or one with a worn out tip is
dangerous because the bit can slip. Replace it.

2. Inspecting the mounting screws

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.

3. Maintenance of the motor

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.

4. Cleaning of the outside

When the angle impact driver 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.

5. Storage

Store the angle impact driver in a place in which the
temperature is less than 40°C and out of reach of
children.

6. Service parts list

A: Item No.
B: Code No.
C: No. Used
D: Remarks

CAUTION

Repair, modification and inspection of Hitachi Power
Tools must be carried out by a Hitachi Authorized
Service Center.
This Parts List will be helpful if presented with the
tool to the Hitachi Authorized Service Center when
requesting repair or other maintenance.
In the operation and maintenance of power tools,
the safety regulations and standards prescribed in
each country must be observed.

MODIFICATIONS

Hitachi Power Tools are constantly being improved
and modified to incorporate the latest technological
advancements.
Accordingly, some parts (i.e. code numbers and/or
design) may be changed without prior notice.

GUARANTEE

We guarantee Hitachi Power Tools in accordance with
statutory/country specific regulation. This guarantee does
not cover defects or damage due to misuse, abuse, or
normal wear and tear. In case of complaint, please send
the Power Tool, undismantled, with the GUARANTEE
C E R T I F I C A T E   f o u n d   a t   t h e   e n d   o f   t h i s   H a n d l i n g
instruction, to a Hitachi Authorized Service Center.

NOTE:

Due to HITACHI’s continuing program of research and
development, the specifications herein are subject to
change without prior notice.