Bedienungsanleitung Makita UC4050A (Seite 14 von 120) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Türkisch)

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being thrown off the saw excessively quickly. Mineral oils

must not be used, as they are harmful to the environment.

(Fig. 21)

CAUTION:

• Prevent the oil from coming into contact with the skin

and eyes. Contact with the eyes causes irritation. In the

event of eye contact, flush the affected eye

immediately with clear water, then consult a doctor at

once.

• Never use waste oil. Waste oil contains carcinogenic

substances. The contaminants in waste oil cause

accelerated wear of the oil pump, the bar and the

chain. Waste oil is harmful to the environment.

• When filling the chain saw with chain oil for the first

time, or refilling the tank after it has been completely

emptied, add oil up to the bottom edge of the filler neck.

The oil delivery may otherwise be impaired.

To fill the oil, perform the following steps: (Fig. 22)

1. Clean the area around the oil filler cap thoroughly to

prevent any dirt from entering the oil tank.

2. Unscrew the oil filler cap and add oil up to the lower

edge of the filler neck.

3. Screw the oil filler cap firmly back in place.

4. Wipe away any spilt chain oil carefully.

NOTE:

• When the chain saw is used for the first time, it may

take up to two minutes for the saw chain oil to begin its

lubricating effect upon the saw mechanism. Run the

saw without load until it does so (see “CHECKS”).

CHECKS

Before starting work, carry out the following checks:

Checking the chain tension

WARNING:

• Always withdraw the mains plug before checking the

chain tension, and wear safety gloves.

(For nut models) (Fig. 17)

(For lever models) (Fig. 18)

Make sure the saw chain fits snugly against the lower side

of the bar (see circle).

Check the chain tension frequently, as new chains are

subject to elongation.

Excessively high tension of saw chain may cause

breakage of saw chain, wear of the guide bar and

breakage of the adjusting dial.

A chain which is too loose can jump off the bar, and

therefore presents an accident risk.

If the chain is too loose: Refer to the section titled

“Adjusting saw chain tension” and adjust the saw chain

tension again.

Checking the switch action

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 prevent the switch trigger from being accidentally

pulled, a lock-off button is provided.

To start the tool, depress the lock-off button and pull the

switch trigger. Release the switch trigger to stop.

Do not pull the switch trigger hard without depressing the

lock-off button. This may cause switch breakage.

Checking the chain brake

NOTE:

• If the chain saw fails to start, check whether the chain

brake is released. To release the chain brake, pull the

hand guard backwards firmly until you feel it engage.

(Fig. 23 & 24)

Check the chain brake as follows:

1. Hold the chain saw with both hands when switching it

on. Hold the rear handle with your right hand, the front

handle with your left. Make sure that the bar and the

chain do not contact with any object.

2. First press the lock-off button, then the switch trigger.

The saw chain starts immediately.

3. Press the front hand guard forwards using the back of

your hand. Make sure that the saw chain comes to an

immediate standstill.

CAUTION:

• If the saw chain does not stop immediately, do not use

the saw under any circumstances. Consult Makita

authorized service centers.

Checking the run-down brake

Switch on the chain saw.

Release the switch trigger completely. Make sure the saw

chain comes to a standstill within a second.

CAUTION:

• If the saw chain does not stop immediately, do not use

the saw under any circumstances. Consult Makita

authorized service centers.

Checking the chain oiler

Before starting work, check the oil level in the tank, and

the oil delivery.

The oil level can be seen in the oil level sight shown in the

figure. (Fig. 25)

Check the oil delivery as follows:

Start the chain saw.

With the saw running, hold the saw chain approximately

15 cm above a tree trunk or the ground. If lubrication is

adequate, the oil spray will produce a light oil trace.

Observe the wind direction, and do not expose yourself to

the oil spray unnecessarily.

CAUTION:

• If an oil trace is not formed, do not use the saw. The

lifespan of the chain will otherwise be reduced. Check

the oil level. Clean the oil feed groove and the oil feed

hole in the bar (refer to “MAINTENANCE”).

Adjusting the chain lubrication (Fig. 26)

You can adjust the oil pump feed rate with the adjusting

screw.

WORKING WITH THE CHAIN SAW

CAUTION:

• Always use a front handle and rear handle and firmly

hold the tool by both front handle and rear handle

during operations.

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