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3. 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.

4. 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.

5. Inspecting the carbon brushes (Fig. 11)

The motor employs carbon brushes which are

consumable parts. Since and excessively worn carbon

brush can result in motor trouble, replace the carbon

brush with new ones when it becomes worn to or near

the "wear limit" ⓐ. In addition, always keep carbon

brushes clean and ensure that they slide freely within the

brush holders.

NOTE

When replacing the carbon brush with a new one, be

sure to use the HiKOKI Carbon Brush Code No. 999054.

6. Replacing carbon brushes (Fig. 11)

Take out the carbon brush by ﬁ rst removing the brush

cap and then hooking the protrusion of the carbon brush

with a ﬂ at head screw driver, etc.

When installing the carbon brush, choose the direction

so that the nail ⓑ of the carbon brush agrees with the

contact portion ⓒ outside the brush tube. Then push it in

with a ﬁ nger. Lastly, install the brush cap.

CAUTION

Be absolutely sure to insert the nail of the carbon brush

into the contact portion outside the brush tube. (You can

insert whichever one of the two nails provided).

Caution must be exercised since any error in this

operation can result in the deformed nail of the carbon

brush and may cause motor trouble at an early stage.

7. Cleaning on the outside

When the tool 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.

8. Storage

Store the tool in a place in which the temperature is less

than 40°C, and out of reach of children.

NOTE

Storing lithium-ion batteries.

Make sure the lithium-ion batteries have been fully

charged before storing them.

Prolonged storage (3 months or more) 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.

CAUTION

In the operation and maintenance of power tools, the

safety regulations and standards prescribed in each

country must be observed.

Important notice on the batteries for the HiKOKI

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).

NOTE

Due to HiKOKI's continuing program of research and

development, the speciﬁ cations herein are subject to

change without prior notice.