Manual Makita da 391dwd (page 4 of 36) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish, Norwegian)

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3. Charge the battery cartridge with room tempera-

ture at 10°C – 40°C (50°F – 104°F). Let a hot bat-

tery cartridge cool down before charging it.

4. Charge the Nickel Metal Hydride battery car-

tridge when you do not use it for more than six

months.

FUNCTIONAL DESCRIPTION

CAUTION:

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

tery cartridge is removed before adjusting or checking

function on the tool.

Installing or removing battery cartridge (Fig. 1)

• Always switch off the tool before insertion or removal of

the battery cartridge.

• To remove the battery cartridge, pull out the set plate

on the tool and grasp both sides of the cartridge while

withdrawing it from the tool.

• To insert the battery cartridge, align the tongue on the

battery cartridge with the groove in the housing and slip

it into place. Snap the set plate back into place. Be sure

to close the set plate fully before using the tool to pre-

vent the battery cartridge from accidentally falling out of

the tool.

• Do not use force when inserting the battery cartridge. If

the cartridge does not slide in easily, it is not being

inserted correctly.

Switch action (Fig. 2)

CAUTION:

• Before inserting the battery cartridge into the tool,

always check to see that the switch trigger actuates

properly and returns to the “OFF” position when

released.

To start the tool, simply pull the switch trigger. Tool speed

is increased by increasing pressure on the switch trigger.

Release the switch trigger to stop.

Reversing switch action (Fig. 3)

This tool has a reversing switch to change the direction of

rotation. Depress the reversing switch lever from the A

side for clockwise rotation or from the B side for counter-

clockwise rotation.

When the reversing switch lever is in the neutral position,

the switch trigger cannot be pulled.

CAUTION:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a

complete stop. Changing the direction of rotation

before the tool stops may damage the tool.

• When not operating the tool, always set the reversing

switch lever to the neutral position.

Overload protector (Fig. 4)

The overload protector automatically cuts out to break

the circuit and the button pops out, whenever heavy work

is prolonged. Wait 20 – 30 seconds before pressing the

reset button to resume operation. The tool should be

switched off when you press the reset button, however.

ASSEMBLY

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.

Installing or removing driver bit or drill bit (Fig. 5)

Hold the ring and turn the sleeve counterclockwise to

open the chuck jaws. Place the bit in the chuck as far as

it will go. Hold the ring firmly and turn the sleeve clock-

wise to tighten the chuck.

To remove the bit, hold the ring and turn the sleeve coun-

terclockwise.

OPERATION

Screwdriving operation (Fig. 6)

Place the point of the driver bit in the screw head and

apply pressure to the tool. Start the tool slowly and then

increase the speed gradually. Release the trigger just as

the screw bottoms out. If the trigger is not released, the

screw may strip out the hole or the screw and/or bit may

be damaged.

CAUTION:

• Make sure that the driver bit is inserted straight in the

screw head, or the screw and/or bit may be damaged.

NOTE:

• When driving wood screws, predrill pilot holes to make

driving easier and to prevent splitting of the workpiece.

See the chart.

Drilling operation

Drilling in wood

When drilling in wood, the best results are obtained with

wood drills equipped with a guide screw. The guide

screw makes drilling easier by pulling the bit into the

workpiece.

Drilling in metal

To prevent the bit from slipping when starting a hole,

make an indentation with a center-punch and hammer at

the point to be drilled. Place the point of the bit in the

indentation and start drilling.

Use a cutting lubricant when drilling metals. The excep-

tions are iron and brass which should be drilled dry.

CAUTION:

• Pressing excessively on the tool will not speed up the

drilling. In fact, this excessive pressure will only serve

to damage the tip of your bit, decrease the tool perfor-

mance and shorten the service life of the tool.

• There is a tremendous force exerted on the tool/bit at

the time of hole break through. Hold the tool firmly and

exert care when the bit begins to break through the

workpiece.

Nominal diameter of

wood screw (mm)

Recommended size of

pilot hole (mm)

3.1 2.0 – 2.2

3.5 2.2 – 2.5

3.8 2.5 – 2.8

4.5 2.9 – 3.2

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Makita da 391dwd Manual

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