Bedienungsanleitung Makita hr 4500 c (Seite 8 von 52) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Schwedisch, Norwegisch, Finnisch)

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Hammer drilling operation (Fig. 14)

Set the change lever to the 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 bal-

ance 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.

Chipping/Scaling/Demolition (Fig. 15)

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.

Depth gauge (Fig. 16)

The depth gauge is convenient for drilling holes of

uniform 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.

Indicator lamp (Fig. 17)

The green power-ON indicator lamp lights up when

the tool is switched ON. If the indicator lamp is lit but

the tool does not start, the carbon brushes may be

worn out, or the electric circuit or the motor may be

defective. If the indicator lamp does not light up and

the tool does not start, the ON/OFF switch or the

mains cord may be defective.

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.

MAINTENANCE

CAUTION:

Always be sure that the tool is switched off and

unplugged before carrying out any work on the tool.

Replacement of carbon brushes (Fig. 18 & 19)

Whenever carbon brushes must be replaced, they cut

out the tool automatically. When this occurs, loosen

the screws which secure the brush holder cover.

Remove the brush holder cover. Then replace both

carbon brushes at the same time. Use only identical

carbon brushes.

Lubrication

This tool requires no hourly or daily lubrication

because it has a grease-packed lubrication system.

Lubricate the tool every time the carbon brushes are

replaced.

Run the tool for several minutes to warm it up. Switch

off and unplug the tool.

Loosen the six screws and remove the handle. Note

that the top screws are different from other screws.

(Fig. 20)

Disconnect the connector by pulling it. (Fig. 21)

Remove the crank cap using a hex wrench. (Fig. 22)

Rest the tool on the table with the bit end pointing

upwards. This will allow the old grease to collect

inside the crank housing. Wipe out the old grease

inside and replace with a fresh grease (60 g). Use

only Makita genuine hammer grease (optional acces-

sory). Filling with more than specified amount of

grease (approx. 60 g) can cause faulty hammering

action or tool failure. Fill only with the specified

amount of grease. Reinstall the crank cap and tighten

with the hex wrench. (Fig. 23)

Connect the connector and reinstall the handle.

(Fig. 24)

CAUTION:

•

Be careful not to damage the terminals or lead wires

especially when wiping out the old grease or install-

ing the handle.

•

Do not tighten the crank cap excessively. It is made

of resin and is subject to breakage.

To maintain product safety and reliability, repairs,

maintenance or adjustment should be carried out by a

Makita Authorized Service Center.

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