Manual Hitachi TCG27EAS (page 13 of 76) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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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 your Hitachi dealer.

NOTE

○ Standard Idle rpm is 2800-3200 rpm.

WARNING

When the engine is idling the cutting attachment must under no

circumstances rotate.

Air ﬁ lter (Fig. 32)

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

Open the air ﬁ lter cover and the ﬁ lter (28). 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. 33)

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. 34)

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.

Flexible drive shaft (Fig. 35)

Flexible drive shaft should be removed and lubricated with good

quality lithium grease every 20 hours. To remove the ﬂ exible shaft,

ﬁ rst remove screw (29), loosen bolt (30) and remove the gear case

then pull the shaft out of the drive shaft pipe. Clean the shaft oﬀ and

apply a generous coat of lithium grease to it and insert if back into

the drive shaft pipe, turn it unit it drops into place then install the

gear case, install & tighten screw (29) and screw (30).

Angle transmission (Fig. 36)

Check angle transmission or angle gear for grease level about every

50 hours of operation by removing the grease ﬁ ller plug on the side

of angle transmission.

If no grease can be seen on the ﬂ anks of the gears, ﬁ ll the

transmission with quality lithium based multipurpose grease up to

3/4. Do not completely ﬁ ll the transmission.

Semi-auto cutting head

Nylon line replacement

(1) Remove the case (31) by ﬁ rmly pushing inward the locking tabs

with your thumbs as shown in Fig. 37.

(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 (32) 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. 38)

(4) Push each line into the stopper holes (33), leaving the loose

ends approx. 10 cm in length. (Fig. 39)

(5) Insert both loose ends of the line through the cord guide (34)

when placing the reel in the case. (Fig. 40)

NOTE

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

(33) with the cord guide (34) for easier line release later.

(6) Place the cover over the case so that the cap locking tabs (35)

on the case meet the long holes (36) on the cover. Then push

the case securely until it clicks into place. (Fig. 41)

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

should be equal on both sides. (Fig. 42)

Blade (

Fig. 43)

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 (38), always face the stamped side

up. In the case of a 3 or 4 tooth blade (37), 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.

000Book_TCG22EAS_WE.indb 13000Book_TCG22EAS_WE.indb 13 2012/10/22 18:09:162012/10/22 18:09:16

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Hitachi TCG27EAS Manual

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