Hitachi CH 55EB3 - Инструкция по эксплуатации - Страница 9

9

English

Spark

plug

 (

Fig.

11

)

The spark plug condition is in

fl

 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 di

ffi

  culties. If the engine 

is  low  on  power,  di

ffi

  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.

Cutter

blade

 (

Fig.

12,

13

)

The blades are installed to the cutter guide with the four or 

fi

 ve 

bolts. Those bolts are tightened with a clearance so that the cutters 

can move smoothly. 

When

clearance

is

too

small

The cutters do not move properly and the sliding surfaces may 

seize.

When

clearance

is

too

large

The cutters are poor in sharpness.

To

adjust

the

cutter

clearance

1.  Loosen the cutter 

fi

 xing nuts.

2.  Fully tighten the cutter 

fi

 xing bolts and then loosen them approx. 

1/2 turn.

3.  With the bolts set at that position, tighten the cutter 

fi

 xing nuts. 

Be sure to replace cutter guide 

fi

 xing bolts when they are loosened, 

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

NOTE

Properly lubricate the cutter 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 cutter blades and the 

gear case.

NOTE

Lubrication should be applied 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 (8), the engine may 

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

cylinder 

fi

 ns and fan case 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

mu

ffl

er

 (

Fig.

17

)

Remove the mu

ffl

  er and spark arrestor (if so equipped), and clean 

out any excess carbon from the exhaust port or mu

ffl

  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.

Maintenance

schedule

Below you will 

fi

 nd some general maintenance instructions. For 

further information please contact your Hitachi dealer.

Daily

maintenance

○

  Clean the exterior of the hedge trimmer.

○

  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 su

ffi

  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 su

ffi

  ciently tightened.

Weekly

maintenance

○

  Check the starter, especially cord and return spring.

○

  Clean the exterior of the spark plug.

○

  Remove it and check the electrode gap. Adjust it to 0.6 mm, or 

change the spark plug.

○

  Clean the cooling 

fi

 ns on the cylinder and check that the air 

intake at the starter is not clogged.

○

  Check gear case is 

fi

 lled with grease.

○

  Clean the air 

fi

 lter.

Monthly

maintenance

○

  Rinse the fuel tank with gasoline.

○

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

○

  Clean the fan and the space around it.

000Book̲CH50EA3̲EE.indb   9

000Book̲CH50EA3̲EE.indb   9

2009/12/04   18:55:53

2009/12/04   18:55:53