Manual Makita HR 3550C (page 8 of 23) (English, German, Dutch, Danish, French, Italian, Portuguese, Swedish, Spanish, Norwegian, Finnish)

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OPERATING INSTRUCTIONS

Accept SDS-top Bit

Installing or removing bit

Important:

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

When selecting an action mode, first set the change

lever and the shift lever to the position shown in

Fig. 5. Then proceed as follows.

Rotation with hammering (Fig.6&7)

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.6&8)

For chipping, scaling or demolition operations,

depress the lock button and rotate the change lever

so that the pointer points to the

symbol. Use a bull

point, cold chisel, scaling chisel, etc.

Rotation only (Fig.6&9)

For drilling in wood, metal or plastic materials, rotate

the shift lever so that the

symbol is aligned with the

pointer on the change lever. Use a twist drill bit or

wood bit.

CAUTION:

•

Do not rotate the change lever and/or the shift lever

when the tool is running under load. The tool will be

damaged.

•

To avoid rapid wear on the mode change mecha-

nism, be sure that the change lever and/or the shift

lever is always positively located in one of the three

action mode positions.

•

The action mode cannot be changed directly from

‘‘hammering only’’ to ‘‘rotation only’’ or from ‘‘rotation

only’’ to ‘‘hammering only’’. First set the change

lever and the shift lever to ‘‘rotation with hammer-

ing’’ mode position shown in Fig. 5. Then set them

to the position for ‘‘hammering only’’ or ‘‘rotation

only’’.

Bit angle

(when chipping, scaling or demolishing)

Important:

Always be sure that the tool is switched off and

unplugged before changing the bit angle.

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 V symbol. Turn the bit to the desired angle.

(Fig. 10)

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. 11)

Side grip (Fig. 12)

CAUTION:

•

Always use the side grip to ensure operating safety

when drilling in concrete, masonry, etc.

•

When the bit begins to break through concrete or if

the bit strikes reinforcing rods embedded in con-

crete, the tool may react dangerously. Maintain

good balance and safe footing while holding the tool

firmly with both hands to prevent dangerous reac-

tion.

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 clock-

wise.

Switch action (Fig. 13)

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

trigger to stop.

Speed change (Fig. 14)

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 set-

tings on the adjusting dial and the revolutions/blows

per minute.

Number on

adjusting dial

Revolutions

per minute

Blows per

minute

6 720 3,300

5 690 3,150

4 590 2,700

3 490 2,250

2 390 1,800

1 360 1,650

HR3550C (E) (’100. 8. 29)

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Makita HR 3550C Manual

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