Manual Makita DHR242RTJW (page 8 of 16) (English, German, Dutch, Danish, French, Italian, Portuguese, Turkish, Spanish)

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Reversing switch action (Fig. 4)

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.

Changing the quick change chuck for SDS-plus

For Model DHR243

The quick change chuck for SDS-plus can be easily

exchanged for the quick change drill chuck.

Removing the quick change chuck for SDS-plus

(Fig. 5)

CAUTION:

• Before removing the quick change chuck for SDS-plus,

always remove the bit.

Grasp the change cover of the quick change chuck for

SDS-plus and turn in the direction of the arrow until the

change cover line moves from the symbol to the

symbol. Pull forcefully in the direction of the arrow.

Attaching the quick change drill chuck (Fig. 6)

Check the line of the quick change drill chuck shows the

symbol. Grasp the change cover of the quick change

drill chuck and set the line to the symbol.

Place the quick change drill chuck on the spindle of the

tool.

Grasp the change cover of the quick change drill chuck

and turn the change cover line to the symbol until a

click can clearly be heard.

Selecting the action mode

Rotation with hammering (Fig. 7)

For drilling in concrete, masonry, etc., depress the lock

button and rotate the action mode changing knob to the

symbol. Use a tungsten-carbide tipped bit.

Rotation only (Fig. 8)

For drilling in wood, metal or plastic materials, depress

the lock button and rotate the action mode changing

knob to the m symbol. Use a twist drill bit or wood bit.

Hammering only (Fig. 9)

For chipping, scaling or demolition operations, depress

the lock button and rotate the action mode changing

knob to the symbol. Use a bull point, cold chisel, scal-

ing chisel, etc.

CAUTION:

• Do not rotate the action mode changing knob when the

tool is running. The tool will be damaged.

• To avoid rapid wear on the mode change mechanism,

be sure that the action mode changing knob is always

positively located in one of the three action mode posi-

tions.

• When changing from the symbol mode to the m

symbol mode, the action mode changing knob may no

longer move in the symbol position. At this time,

turn the tool on or turn the chuck by hand in the

symbol position and then rotate the action mode

changing knob. Forcing the action mode changing

knob may cause tool damage.

Torque limiter

The torque limiter will actuate when a certain torque level

is reached. The motor will disengage from the output

shaft. When this happens, the bit will stop turning.

CAUTION:

• As soon as the torque limiter actuates, switch off the

tool immediately. This will help prevent premature wear

of the tool.

• Hole saws cannot be used with this tool. They tend to

pinch or catch easily in the hole. This will cause the

torque limiter to actuate too frequently.

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.

Side grip (auxiliary handle) (Fig. 10)

CAUTION:

• Always use the side grip to ensure operating safety.

Install the side grip so that the protrusion on the grip fit in

between the grooves in the tool barrel. Then tighten the

grip by turning clockwise at the desired position. It may

be swung 360° so as to be secured at any position.

Bit grease

Coat the bit shank head beforehand with a small amount

of bit grease (about 0.5 – 1 g). This chuck lubrication

assures smooth action and longer service life.

Installing or removing the bit

Clean the bit shank and apply bit grease before installing

the bit. (Fig. 11)

Insert the bit into the tool. Turn the bit and push it in until

it engages.

If the bit cannot be pushed in, remove the bit. Pull the

chuck cover down a couple of times. Then insert the bit

again. Turn the bit and push it in until it engages.

(Fig. 12)

After installing, always make sure that the bit is securely

held in place by trying to pull it out.

To remove the bit, pull the chuck cover down all the way

and pull the bit out. (Fig. 13)

Bit angle (when chipping, scaling or demolishing)

(Fig. 14 & 15)

The bit can be secured at the desired angle. To change

the bit angle, depress the lock button and rotate the

action mode changing knob to the

O symbol. Turn the

bit to the desired angle.

Depress the lock button and rotate the action mode

changing knob to the symbol. Then make sure that

the bit is securely held in place by turning it slightly.

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Makita DHR242RTJW Manual

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