Bedienungsanleitung Hitachi CH27EPAP (Seite 9 von 56) (Deutsch, Englisch, Holländisch, Französisch, Italienisch, Portugiesisch, Spanisch)

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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 Hitachi Authorized Service Centers.

NOTE

Standard Idle rpm is 3000 min

-1

WARNING

When the engine is idling the cutting attachment must under no

circumstances rotate.

Air ﬁ lter (Fig. 18)

The air ﬁ lter 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.

Cleaning the air ﬁ lter

Remove the air ﬁ lter cover and the ﬁ lter (19). Rinse it 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.

Fuel ﬁ lter (Fig. 19)

Drain all fuel from fuel tank and pull fuel ﬁ lter line from tank. Pull ﬁ lter

element out of holder assembly and rinse element in warm water with

detergent.

Rinse thoroughly until all traces of detergent are eliminated. Squeeze,

do not wring, away excess water and allow element to air dry.

NOTE

If element is hard due to excessive dirt build-up, replace it.

Spark plug (Fig. 20)

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. Re-adjust 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.

NOTE

In some areas, local law requires using a resistor spark plug

to suppress ignition signals. If this machine was originally

equipped with resistor spark plug, use same type of spark plug

for replacement.

Cutting blade (Fig. 21, 22)

The blades are installed to the blade guide with three to ﬁ ve bolts

depending on blade length. Those bolts are tightened with a

clearance so that the blades can move smoothly.

When clearance is too small

The blades do not move properly and the sliding surfaces may seize.

When clearance is too large

The blades are poor in sharpness.

To adjust the blade clearance

1. Loosen the blade ﬁ xing nuts.

2. Fully tighten the blade ﬁ xing bolts and then loosen them approx.

1/2 turn.

3. With the bolts set at that position, tighten the blade ﬁ xing nuts.

Be sure to replace blade guide ﬁ xing bolts when they are loosened,

worn or damaged. Also be sure to replace damaged cutter blade.

NOTE

Properly lubricate the blade sliding surfaces with machine oil.

Gear case (Fig. 23)

Apply good quality lithium based grease through the grease ﬁ ttings.

On some models, one of the grease ﬁ ttings has been moved from

upper location to the bottom.

NOTE

Lubrication should be applied about 5 g at 20 hour intervals and

more frequently with heavy use.

Maintenance schedule

Below you will ﬁ nd some general maintenance instructions. For

further information please contact Hitachi Authorized Service

Centers.

Daily maintenance

○ Check to ascertain that the fuel is not leaking.

○ Clean the exterior of the unit.

○ Check the blade guard for damage or cracks.

Change the guard in case of impacts or cracks.

○ Check that the blade is sharp, and without cracks.

○ Check that the blade nut is suﬃ ciently tightened.

○ Make sure that the blade transport guard is undamaged and that

it can be securely ﬁ tted.

○ Check that nuts and screws are suﬃ ciently tightened.

Weekly maintenance

○ Check the starter, especially the cord and return spring.

○ Clean the exterior of the spark plug.

○ Remove the spark plug and check the electrode gap. Adjust it to

0.6 mm or change the spark plug.

○ Check that the air intake at the starter is not clogged.

○ Check that the angle gear is ﬁ lled with grease.

○ Clean the air ﬁ lter.

Monthly maintenance

○ Rinse the fuel tank with gasoline, and clean fuel ﬁ lter.

○ Clean the exterior of the carburetor and the space around it.

Quarterly maintenance

○ Clean the cooling ﬁ ns on the cylinder.

○ Clean the fan and the space around it.

○ Clean the muﬄ er of carbon.

CAUTION

Cleaning of cylinder ﬁ ns, fan and muﬄ er shall be done by a

Hitachi Authorized Service Center.

000Book_CH27EPAP(S)_WE.indb 9000Book_CH27EPAP(S)_WE.indb 9 2012/09/27 14:26:472012/09/27 14:26:47

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