Manual Makita MT691 (page 6 of 48) (English, German, Dutch, Danish, French, Italian, Portuguese, Turkish, Spanish)

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Procedure (1)

To install the bit, pull the sleeve in the direction of the

arrow and insert the bit into the sleeve as far as it will go.

Then release the sleeve to secure the bit. (Fig. 5)

Procedure (2)

In addition to the procedure (1) above, insert the bit-

piece into the sleeve with its pointed end facing in.

To remove the bit, pull the sleeve in the direction of the

arrow and pull the bit out. (Fig. 6)

NOTE:

• 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.

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

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

Hook (optional accessory) (Fig. 7)

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

CAUTION:

• Do not cover vents, or it may cause overheating and

damage to the tool. (Fig. 8 & 9)

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. 10 & 11)

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 M8 or smaller screw, carefully adjust

pressure on the switch trigger so that the screw is not

damaged.

• Hold the tool pointed straight at the screw.

• If the impact force is too strong 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 starting your job,

always perform a test operation to determine the

proper fastening time for your screw.

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 except for the following trou-

bleshooting related to the light.

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

like. Discoloration, deformation or cracks may result.

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.

A=17 mm

B=14 mm

To install these types of bits, follow the

procedure (1).

A=12 mm

B=9 mm

To install these types of bits, follow the

procedure (2).

(Note) Bit-piece is necessary for install-

ing the bit.

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Makita MT691 Manual

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