Bedienungsanleitung Hitachi CH22ECP (Seite 7 von 72) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch, Portugiesisch, Spanisch, Schwedisch, Norwegisch, Finnisch)

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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.

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 the same type of spark

plug for replacement.

Cutting blade (Fig. 12, 13)

The blades are installed to the blade guide with the four, ﬁ ve or six

bolts. 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. 3/8 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. 14)

Apply a good quality lithium based grease through the grease ﬁ tting

until a small amount comes out between the cutting blades and the

gear case. Lubricate the grease from the grease nipple (indicated

by an arrow) next to the gear case using a commercially available

cartridge grease gun.

NOTE

Lubrication should be applied 3g at 20 hour intervals and more

frequently with heavy use.

Fuel ﬁ lter (Fig. 15)

Remove the fuel ﬁ lter from the fuel tank and thoroughly wash it in

solvent. After that, push the

ﬁ lter into the tank completely.

NOTE

If the ﬁ lter is hard due to dust and dirt, replace it.

Cleaning the cylinder ﬁ ns (Fig. 16)

When leaves get caught between cylinder ﬁ ns (7), the engine may

overheat, resulting in lower output. To avoid this, always keep

cylinder ﬁ ns and cylinder cover clean.

Every 100 operating hours, or once a year (more often if conditions

require), clean ﬁ ns and external surfaces of engine of dust, dirt and

oil deposits which can contribute to improper cooling.

Cleaning the muﬄ er (Fig. 17)

Remove the muﬄ er and spark arrestor (if so equipped), and clean

out any excess carbon from the exhaust port or muﬄ er inlet every

100 hours of operation.

For long-term storage

Drain all fuel from the fuel tank. Start and let engine run until it stops.

Repair any damage which has resulted from use. Clean the unit with

a clean rag, or high pressure air hose. Put a few drops of two-cycle

engine oil into the cylinder through the spark plug hole, and spin the

engine over several times to distribute oil. Cover the unit and store

it in a dry area.

○ The machine will automatically shut oﬀ if the throttle lever

is pressed while the handle is NOT secured in one of the ﬁ ve

preset positions. Never attempt to operate the machine unless

the rear handle is properly locked in place.

To rotate the handle; push the lock lever (6) allowing the handle

to turn. Press the lock lever (6) to release the lock and allow the

handle to turn. Rotate the handle to the desired 0°, 45° or 90°

locking position and release the lock lever (6) to lock the handle

in place.

D: LOCK

E: UNLOCK

Stopping (Fig. 8)

Decrease engine speed, and push stop switch to stop position (F).

MAINTENANCE

MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION

CONTROL DEVICES AND SYSTEM MAY BE PERFORMED

BY ANY NONROAD ENGINE REPAIR ESTABLISHMENT OR

INDIVIDUAL.

Carburetor adjustment (Fig. 9)

WARNING

○ The cutting attachment may be spinning during carburetor

adjustments.

○ Never start the engine without the complete cleaner cover.

Otherwise the clutch can come loose and cause personal

injuries.

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 Hitachi dealer.

Air ﬁ lter (Fig. 10)

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 cleaner cover and the ﬁ lter. 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 by a new one. A damaged ﬁ lter must

always be replaced.

NOTE

Saturate the element in 2-cycle oil or the equivalent. Squeeze

the element to distribute the oil completely and to remove any

excess oil.

Spark plug (Fig. 11)

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).

000Book_CH22EAP(50ST)_WE_NE.indb 7000Book_CH22EAP(50ST)_WE_NE.indb 7 2012/01/16 10:11:422012/01/16 10:11:42

Hitachi CH22ECP Seite 7

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