Bedienungsanleitung Makita BTW072 (Seite 7 von 72) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Schwedisch, Norwegisch, Finnisch)

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Confirming the presetting

Switch off the tool and insert the battery cartridge. The indicating lamp will indicate the presetting number.

Green lamp shows the first digit. Red lamp shows the second digit.

Example: Presetting number is 12.

Green color lamp flashes once.  Red color lamp flashes two times.  The lamp goes out.

Relation between presetting number and action

Indicating lamp

• After impacting preset numbers, the indicating lamp

lights in green color.

• The red color light will light on if the trigger is pulled

before the presetting number of impacts is achieved. It

indicates that the operation is incomplete.

Operation

[*1] Presetting number of impacts is impossible for more

than 200 impacts (4 seconds).

[*2] Fastening time includes when you pull the trigger

completely.

The proper fastening torque may differ depending upon

the kind or size of the bolt. The relation between fasten-

ing torque and fastening time is shown in Fig. 11 for stan-

dard bolt or Fig. 12 for high tensile bolt.

Hold the tool firmly and place the socket over the bolt or

nut. Turn the tool on and fasten for the proper fastening

time.

NOTE:

• Hold the tool pointed straight at the bolt or nut without

applying excessive pressure on the tool.

• Excessive fastening torque may damage the bolt or

nut. Before starting your job, always perform a test

operation to verify the adequate fastening speed and

time for your bolt or nut.

The fastening torque is affected by a wide variety of fac-

tors including the following. After fastening, always check

the torque with a torque wrench.

1. When the battery cartridge is discharged almost

completely, voltage will drop and the fastening

torque will be reduced.

2. Socket

• Failure to use the correct size socket will cause a

reduction in the fastening torque.

• A worn socket (wear on the hex end or square

end) will cause a reduction in the fastening torque.

3. Bolt

• Even though the torque coefficient and the class of

bolt are the same, the proper fastening torque will

differ according to the diameter of the bolt.

• Even though the diameters of bolts are the same,

the proper fastening torque will differ according to

the torque coefficient, the class of bolt and the bolt

length.

4. The use of the universal joint or the extension bar

somewhat reduces the fastening force of the impact

wrench. Compensate by fastening for a longer

period of time.

5. Type of materials to be fastened, the manner of hold-

ing the tool and the tool speed will affect the torque.

MAINTENANCE

CAUTION:

Always be sure that the tool is switched off and the bat-

tery cartridge is removed before carrying out any work on

the tool.

Replacement of carbon brushes (Fig. 13 & 14)

Replace carbon brushes when they are worn down to the

limit mark. Both identical carbon brushes should be

replaced at the same time.

To maintain product safety and reliability, repairs, mainte-

nance or adjustment should be carried out by a Makita

Authorized Service Center.

Presetting

number

Clockwise rotation Counterclockwise rotation

00 Auto-stop setting does not work. Auto-stop setting does not work.

01 – 99

After impacting [number of impacts

(presetting number x 2) x 0.02] seconds

 Green color lamp lights on.

Switch off before impacting [number of

impacts(presetting number x 2) x 0.02] sec-

onds

 Red color lamp lights on. Then,the lamp will

go out.

Auto-stop setting does not work. Indication

lamp goes out.

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