Manual Hitachi WH14DSAL (page 12 of 72) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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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 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.

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, significantly

reducing battery usage time or rendering the batteries

incapable of holding a charge.

However, significantly reduced battery usage time

may be recovered by repeatedly charging and using

the batteries two to five 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, 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 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

modified (such as disassembly and replacement

of cells or other internal parts).

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

CERTIFICATE found at the end of this Handling

instruction, to a Hitachi Authorized Service Center.

NOTE:

Due to HITACHI’s continuing program of reserch and

development, the specifications herein are subject to

change without prior notice.

01Eng_WH14DSAL_WE 6/13/13, 17:4911

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Hitachi WH14DSAL Manual

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