Bedienungsanleitung Makita hr 4500 c (Seite 6 von 17) (Englisch, Holländisch)

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OPERATING INSTRUCTIONS

Installing or removing bit

CAUTION:

Always be sure that the tool is switched off and

unplugged before installing or removing the bit.

Clean the bit shank and apply the bit grease provided to

it before installing the bit. (Fig. 1)

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

it engages. (Fig. 2)

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. 3)

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. 4)

Selecting action mode

Rotation with hammering (Fig. 5 & 6)

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

button and rotate the change lever so that the pointer

points to the

symbol. Use a tungsten- carbide tipped

bit.

Hammering only (Fig. 5 & 7)

For chipping, scaling or demolition operations, depress

the lock button and rotate the change lever so that the

pointer points to the

g symbol. Use a bull point, cold

chisel, scaling chisel, etc.

CAUTION:

• Do not rotate the change lever when the tool is running

under load. The tool will be damaged.

• To avoid rapid wear on the mode change mechanism,

be sure that the change lever is always positively

located in one of the two action mode positions.

Bit angle

(when chipping, scaling or demolishing)

CAUTION:

Always be sure that the tool is switched off and

unplugged before changing the bit angle.

The bit can be secured at 16 different angles. To change

the bit angle, depress the lock button and rotate the

change lever so that the pointer points to the

O symbol.

Turn the bit to the desired angle. (Fig. 8)

Depress the lock button and rotate the change lever so

that the pointer points to the

g symbol. (Fig. 9)

Then make sure that the bit is securely held in place by

turning it slightly.

Side handle (Fig. 10)

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.

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.

Side grip (Fig. 11)

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.

Switch action (Fig. 12)

CAUTION:

Before plugging in 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 trigger. Release the trig-

ger to stop.

Speed change (Fig. 13)

The revolutions and blows per minute can be adjusted

just by turning the adjusting dial. The dial is marked 1

(lowest speed) to 6 (full speed). Refer to the table below

for the relationship between the number settings on the

adjusting dial and the revolutions/blows per minute.

Hammer drilling operation (Fig. 14)

Set the change lever to the h symbol. Position the bit

at the location for the hole, then pull the trigger. Do not

force the tool. Light pressure gives best results. Keep the

tool in position and prevent 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 from the hole. By repeating this several

times, the hole will be cleaned out.

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.

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.

Number on

adjusting dial

Revolutions per

minute

Blows per

minute

6 240 2,550

5 230 2,450

4 200 2,100

3 160 1,700

2 130 1,300

1 120 1,250

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