Maintenance And Inspection - Hitachi WH 14DJL Bedienungsanleitung

English
4. 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 operaton time. Use the correct operating
time for the bolt.
5. Confi rm the tightening torque
The following factors contribute to a reduction of the
tightening torque. So confi rm the actual tightening torque
needed by screwing up some bolts before the job with
a hand torque wrench. Factors aff ecting 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 diff ers with the diameter of the bolt.
Generally a larger diameter bolt requires larger tightening
torque.
(4) Tightening conditions
The tightening torque diff ers according to the torque ratio;
class, and length of bolts even when bolts with the same
size threads are used. The tightening torque also diff ers
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 may
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 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, as they melt
plastics.
5. Storage
Store the impact driver in a place in which the temperature
is less than 40°C, and out of reach of children.
NOTE
Make sure that the battery is fully charged when stored
for a long period (3 months or more). The battery with
smaller capacity may not be able to be charged when
used, if stored for a long period.
10
NOTE
Storing Lithium-ion Batteries
Make sure the lithium-ion batteries have been fully
charged before storing them.
Prolonged storage of batteries with a low charge may
result in performance deterioration, signifi cantly reducing
battery usage time or rendering the batteries incapable of
holding a charge.
However, signifi cantly reduced battery usage time may
be recovered by repeatedly charging and using the
batteries two to fi ve times.
If the battery usage time is extremely short despite
repeated charging and use, consider the batteries dead
and purchase new batteries.
6. Service parts list
CAUTION
Repair, modifi cation 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 modifi ed to incorporate the latest technological
advancements.
Accordingly, some parts may be changed without prior
notice.
Important notice on the batteries for the Hitachi
cordless power tools
Please always use one of our designated genuine
batteries. We cannot guarantee the safety and
performance of our cordless power tool when used with
batteries other than these designated by us, or when
the battery is disassembled and modifi ed (such as
disassembly and replacement of cells or other internal
parts).
GUARANTEE
We guarantee Hitachi Power Tools in accordance with
statutory/country specifi c 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 CERTIFICATE
found at the end of this Handling instruction, to a Hitachi
Authorized Service Center.
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.