Bedienungsanleitung Hikoki CS51EAP (Seite 13 von 216) (Alle Sprachen)

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CROSS CUTTING/BUCKING

Before starting to cut through the log, try to imagine what

is going to happen. Look out for stresses in the log and cut

through it in such a manner that the guide bar will not get

pinched.

CROSS CUTTING LOGS, PRESSURE ON TOP

Take a ﬁ rm stance. Begin with an upper cut. Do not cut too

deeply, about 1/3 of the log diameter is enough. Finish with

a bottom cut.

The saw cuts should meet. (Fig. 28)

29. Relieving cut

30. Cross cut

31. Pressure on top

32. Pressure side

33. Tension side

34. Relative depth of saw cuts

THICK LOG, LARGER THAN GUIDE BAR LENGTH

Begin by cutting on the opposite side of the log. Pull the

chain saw towards you, followed by previous procedure.

(Fig. 29)

If the log is lying on the ground make a boring cut to avoid

cutting into the ground. Finish with a bottom cut. (Fig. 30)

CROSS CUTTING LOGS, PRESSURE ON BOTTOM

Take a ﬁ rm stance. Begin with a bottom cut. The depth of the

cut should be about 1/3 of the log diameter.

Finish with an upper cut. The saw cuts should meet. (Fig. 31)

35. Relieving cut

36. Cross cut

37. Pressure on bottom

38. Tension side

39. Pressure side

40. Relative depth of saw cuts

THICK LOG, LARGER THAN GUIDE BAR LENGTH

Begin by cutting on the opposite side of the log. Pull the

chain saw towards you, followed by previous procedure.

Make a boring cut if the log is close to the ground. Finish

with a top cut. (Fig. 32)

WARNING

KICKBACK DANGER

Do not attempt a boring cut if you are not properly

trained. A boring cut involves the use of the nose of the

guide bar and can result in kickback. (Fig. 33)

IF THE CHAIN SAW GETS STUCK

Stop the engine. Raise the log or change its position, using

a thick branch or pole as a lever. Do not try to pull the chain

saw free. If you do, you can deform the handle or be injured

by the saw chain if the chain saw is suddenly released.

MAINTENANCE

Carburetor adjustment (Fig. 34)

In the carburetor, fuel is mixed with air. When the engine is

test run at the factory, the carburetor is adjusted. A further

adjustment may be required, according to climate and

altitude. The carburetor has one adjustment possibility:

T = Idle speed adjustment screw.

Idle speed adjustment (T)

Check that the air ﬁ lter is clean. When the idle speed is

correct, the cutting attachment will not rotate. If adjustment

is required, close (clockwise) the T-screw, with the engine

running, until the cutting attachment starts to rotate. Open

(counter-clockwise) the screw until the cutting attachment

stops. You have reached the correct idle speed when the

engine runs smoothly in all positions well below the rpm

when the cutting attachment starts to rotate.

If the cutting attachment still rotates after idle speed

adjustment, contact HiKOKI Authorized Service Centers.

WARNING

When the engine is idling the cutting attachment must

under no circumstances rotate.

NOTE

Do not touch the High speed adjustment (H) and the Low

speed adjustment (L).

Those are only for HiKOKI Authorized Service Centers.

If you rotate them, it will cause a serious damage to the

machine.

Air ﬁ lter (Fig. 35)

The air ﬁ lter (41) must be cleaned from dust and dirt in order

to avoid:

○ Carburetor malfunctions.

○ Starting problems.

○ Engine power reduction.

○ Unnecessary wear on the engine parts.

○ Abnormal fuel consumption.

Clean the air ﬁ lter daily or more often if working in

exceptionally dusty areas.

Remove the air ﬁ lter cover (42) and the ﬁ lter (41).

Rinse them in warm soap suds. Check that the ﬁ lter is dry

before reassembly. An air ﬁ lter that has been used for some

time cannot be cleaned completely. Therefore, it must

regularly be replaced with a new one. A damaged ﬁ lter must

always be replaced.

Spark plug (Fig. 36)

The spark plug condition is inﬂ uenced by:

○ An incorrect carburetor setting.

○ Wrong fuel mixture (too much oil in the gasoline)

○ A dirty air ﬁ lter.

○ Hard running conditions (such as cold weather).

These factors cause deposits on the spark plug electrodes,

which may result in malfunction and starting diﬃ culties. If

the engine is low on power, diﬃ cult to start or runs poorly at

idling speed, always check the spark plug ﬁ rst. If the spark

plug is dirty, clean it and check the electrode gap. Readjust

if necessary. The correct gap is 0.6 mm. The spark plug

should be replaced after about 100 operation hours or earlier

if the electrodes are badly eroded.

Oiler port (Fig. 37)

Clean the chain oiler port (43) whenever possible.

Guide bar (Fig. 38)

Before using the machine, clean the groove and oiler port

(44) in the guide bar.

Side case (Fig. 39)

Always keep the side case and drive area clean of saw dust and

debris. Periodically apply oil or grease to this area to protect

from corrosion as some trees contain high levels of acid.

NOTE

Pull up the front hand guard towards you and release the

brake to remove or install the side case.

Fuel ﬁ lter (Fig. 40)

Remove the fuel ﬁ lter (45) from the fuel tank, and replace it

if it is dirty.

NOTE

A blocked fuel ﬁ lter (45) can prevent the supply of fuel and

cause a rotation malfunction of the engine.

Chain oil ﬁ lter (Fig. 40)

Remove the oil ﬁ lter (46) from the oil tank, and replace it if

it is dirty.

NOTE

A blocked oil ﬁ lter (46) can prevent the supply of chain oil

and cause the guide bar and saw chain to seize.

Cleaning the cylinder ﬁ ns (Fig. 41)

When wood chips are caught between cylinder ﬁ ns (47),

the engine may overheat, resulting in lower output. To avoid

this, always keep cylinder ﬁ ns and fan case clean.

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Hikoki CS51EAP Seite 13

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