Makita DTD146 User Manual download pdf (Page 8)

1. To install the bit, pull the sleeve and insert the bit into

the sleeve as far as it will go. (Fig. 9)

2. To install the bit, insert the bit-piece and bit into the

sleeve as far as it will go. The bit-piece should be

inserted into the sleeve with its pointed end facing

in. Then release the sleeve to secure the bit.

(Fig. 10)

To remove the bit, pull the sleeve and pull the bit out.

NOTE:

• For all countries other than Europe, it's not necessary

to pull the sleeve when installing the bit.

• If the bit is not inserted deep enough into the sleeve,

the sleeve will not return to its original position and the

bit will not be secured. In this case, try re-inserting the

bit according to the instructions above.

• When it is difficult to insert the bit, pull the sleeve and

insert it into the sleeve as far as it will go.

• After inserting the bit, make sure that it is firmly

secured. If it comes out, do not use it.

Hook (Fig. 11)

The hook is convenient for temporarily hanging the tool.

This can be installed on either side of the tool.

To install the hook, insert it into a groove in the tool hous-

ing on either side and then secure it with a screw. To

remove, loosen the screw and then take it out.

OPERATION

The proper fastening torque may differ depending upon

the kind or size of the screw/bolt, the material of the

workpiece to be fastened, etc. The relation between fas-

tening torque and fastening time is shown in the figures.

(Fig. 12, 13 & 14)

Hold the tool firmly and place the point of the driver bit in

the screw head. Apply forward pressure to the tool to the

extent that the bit will not slip off the screw and turn the

tool on to start operation.

NOTE:

• Use the proper bit for the head of the screw/bolt that

you wish to use.

• When fastening screw M8 or smaller, carefully adjust

pressure on the switch trigger so that the screw is not

damaged.

• Hold the tool pointed straight at the screw.

• If you tighten the screw for a time longer than shown in

the figures, the screw or the point of the driver bit may

be overstressed, stripped, damaged, etc. Before start-

ing your job, always perform a test operation to deter-

mine the proper fastening time for your screw.

• If you use a spare battery to continue the operation,

rest the tool at least 15 min.

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. Driver bit or socket bit

Failure to use the correct size driver bit or socket bit

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 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 manner of holding the tool or the material of

driving position to be fastened will affect the torque.

5. Operating the tool at low speed will cause a reduc-

tion in the fastening torque.

MAINTENANCE

CAUTION:

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

tery cartridge is removed before attempting to perform

inspection or maintenance.

• Never use gasoline, benzine, thinner, alcohol or the

like. Discoloration, deformation or cracks may result.

Replacing carbon brushes

Replace when they wear down to the limit mark. Keep

the carbon brushes clean and free to slip in the holders.

Both carbon brushes should be replaced at the same

time. Use only identical carbon brushes. (Fig. 15)

Use a screwdriver to remove two screws then remove

the rear cover. (Fig. 16)

Raise the arm part of the spring and then place it in the

recessed part of the housing with a slotted bit screw-

driver of slender shaft or the like. (Fig. 17)

Use pliers to remove the carbon brush caps of the car-

bon brushes. Take out the worn carbon brushes, insert

the new ones and replace the carbon brush cap in

reverse. (Fig. 18)

Make sure to place the lead wire in opposite side of the

arm. (Fig. 19)

Make sure that the carbon brush caps fit into the holes in

brush holders securely. (Fig. 20)

Reinstall the rear cover and tighten two screws securely.

To maintain product SAFETY and RELIABILITY, repairs,

any other maintenance or adjustment should be per-

formed by Makita Authorized Service Centers, always

using Makita replacement parts.

OPTIONAL ACCESSORIES

CAUTION:

• These accessories or attachments are recommended

for use with your Makita tool specified in this manual.

The use of any other accessories or attachments might

present a risk of injury to persons. Only use accessory

or attachment for its stated purpose.

If you need any assistance for more details regarding

these accessories, ask your local Makita Service Center.

• Screw bits

• Hook

• Plastic carrying case

• Various type of Makita genuine batteries and chargers

• Battery protector

NOTE:

• Some items in the list may be included in the tool pack-

age as standard accessories. They may differ from

country to country.

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Makita DTD146 User Manual Page 8

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