Brugsanvisning Makita HR4011C Borehammer

Brugsanvisning

8

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.

Indicator lamp (Fig. 9)

The green power-ON indicator lamp lights up when the

tool is plugged. If the indicator lamp does not light up, the

mains cord or the controller may be defective. The indica-

tor lamp is lit but the tool does not start even if the tool is

switched on, the carbon brushes may be worn out, or the

controller, the motor or the ON/OFF switch may be defec-

tive.

The red service indicator lamp lights up when the carbon

brushes are nearly worn out to indicate that the tool

needs servicing. After approx. 8 hours of use, the motor

will automatically be shut off.

ASSEMBLY

CAUTION:

• Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Side handle

CAUTION:

• Use the side handle only when chipping, scaling or

demolishing. Do not use it when drilling in concrete,

masonry, etc. The tool cannot be held properly with this

side handle when drilling. (Fig. 10)

The side handle can be swung 360° on the vertical and

secured at any desired position. It also secures at eight

different positions back and forth on the horizontal. Just

loosen the clamp nut to swing the side handle to a

desired position. Then tighten the clamp nut securely.

(Fig. 11)

Side grip (Fig. 12)

CAUTION:

• Always use the side grip to ensure operating safety

when drilling in concrete, masonry, etc.

The side grip swings around to either side, allowing easy

handling of the tool in any position. Loosen the side grip

by turning it counterclockwise, swing it to the desired

position and then tighten it by turning clockwise.

Installing or removing the bit

Clean the bit shank and apply bit grease before installing

the bit. (Fig. 13)

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.

After installing, always make sure that the bit is securely

held in place by trying to pull it out. (Fig. 14)

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

and pull the bit out. (Fig. 15)

Bit angle (when chipping, scaling or demolishing)

The bit can be secured at 12 different angles. To change

the bit angle, depress the lock button and rotate the

change lever so that the pointer points to the symbol.

Turn the bit to the desired angle. (Fig. 16 & 17)

Depress the lock button and rotate the change lever so

that the pointer points to the symbol. Then make sure

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

(Fig. 18 & 19)

Depth gauge (Fig. 20)

The depth gauge is convenient for drilling holes of uni-

form depth. Loosen the clamp screw and adjust the

depth gauge to the desired depth. After adjusting, tighten

the clamp screw firmly.

NOTE:

• The depth gauge cannot be used at the position where

the depth gauge strikes against the gear housing/motor

housing.

OPERATION

Hammer drilling operation (Fig. 21)

Set the change lever to the symbol.

Position the bit at the desired location for the hole, then

pull the switch trigger. Do not force the tool. Light pres-

sure gives best results. Keep the tool in position and pre-

vent it from slipping away from the hole.

Do not apply more pressure when the hole becomes

clogged with chips or particles. Instead, run the tool at an

idle, then remove the bit partially from the hole. By

repeating this several times, the hole will be cleaned out

and normal drilling may be resumed.

CAUTION:

• When the bit begins to break through concrete or if the

bit strikes reinforcing rods embedded in concrete, the

tool may react dangerously. Maintain good balance and

safe footing while holding the tool firmly with both

hands to prevent dangerous reaction.

Blow-out bulb (optional accessory) (Fig. 22)

After drilling the hole, use the blow-out bulb to clean the

dust out of the hole.

Chipping/Scaling/Demolition (Fig. 23)

Set the change lever to the symbol.

Hold the tool firmly with both hands. Turn the tool on and

apply slight pressure on the tool so that the tool will not

bounce around, uncontrolled. Pressing very hard on the

tool will not increase the efficiency.

Bedømmelse

Mere om denne brugsanvisning

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