Manual Hitachi CG25EUS (page 12 of 64) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

Cleaning the air ﬁ lter

Remove the air ﬁ lter cover and the ﬁ lter (21). 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. 28)

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 buildup, replace it.

Spark plug (Fig. 29)

The spark plug condition is inﬂ uenced by:

○ An incorrect carburetor setting

○ A dirty air ﬁ lter

○ Hard running conditions (such as cold weather)

○ Too much engine oil

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.

Semi-auto cutting head

Nylon line replacement

(1) Remove the case (24) by ﬁ rmly pushing inward the locking tabs

with your thumbs as shown in Fig. 31.

(2) After removing the case, take out the reel and discard the

remaining line.

(3) Fold the new nylon line unevenly in half as shown in picture.

Hook the U-shaped end of the nylon line into the groove (25) on

the center partition of the reel.

Wind both halves of the line on the reel in the same direction,

keeping each half of the line on its own side of the partition.

(Fig.

32)

(4) Push each line into the stopper holes (26), leaving the loose

ends approx. 10 cm in length. (Fig. 33)

(5) Insert both loose ends of the line through the cord guide (27)

when placing the reel in the case. (Fig. 34)

NOTE

When placing a reel in the case, try to line up the stopper holes

(26) with the cord guide (27) for easier line release later.

(6) Place the cover over the case so that the cap locking tabs on

the case meet the long holes on the cover. Then push the case

securely until it clicks into place. (Fig. 35)

(7) The initial cutting line length should be approx. 11–14 cm and

should be equal on both sides. (Fig. 36)

Blade (Fig. 30)

WARNING

Wear protective gloves when handling or performing

maintenance on the blade.

○ Use a sharp blade. A dull blade is more likely to snag and thrust.

Replace the fastening nut if it is damaged and hard to tighten.

○ When replacing blade, purchase one recommended by Hitachi,

with a 25.4 mm (one inch) ﬁ tting hole.

○ When installing a saw blade (23), always face the stamped side

up. In the case of a 3 or 4 tooth blade (22), it can be used on

either side.

○ Use the correct blade for the type of work.

○ When replacing blades, use appropriate tools.

○ When cutting edges become dull, re-sharpen or ﬁ le as shown

in the illustration. Incorrect sharpening may cause excessive

vibration.

○ Discard blades that are bent, warped, cracked, broken or

damaged in any way.

NOTE

When sharpening blade it is important to maintain an original

shape of radius at the base of the tooth to avoid cracking.

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 unit.

○ Check that the harness is undamaged.

○ Check the blade guard for damage or cracks. Change the guard

in case of impacts or cracks.

○ Check that the cutting attachment is properly centred, sharp,

and without cracks. An oﬀ -centre cutting attachment induces

heavy vibrations that may damage the unit.

○ Check that the cutting attachment 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.

○ Check the volume and condition of the engine oil.

Weekly maintenance

○ Check the starter, especially the 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 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.

000Book_CG25EUS_WE.indb 12000Book_CG25EUS_WE.indb 12 2009/12/25 21:39:082009/12/25 21:39:08

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Hitachi CG25EUS Manual

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