Hitachi CG 24EC, CG 27EC Handling Instructions Manual

CG 24EC (S) / CG 24EC (SL) CG 27EC (SL)

en es pt

Handling instructions

Instrucciones de manejo

Instruções de uso

CG 24EC (S)

CG24EC(S)

CG24ECP(SL) CG27ECP(SL)

234

Q R

567

8910

14 15

11 12 13

14 15 16

17 18 19

20 21 22

23 24 25

26 27 28

0.6 mm

10 cm

29 30 31

10 cm

11-14 cm

English

MEANINGS OF SYMBOLS

NOTE: Some units do not carry them.

Symbols

WARNING

The following show symbols used for the machine. Be sure that you understand their meaning before use.

Grass Trimmer / Brush Cutter Priming pump

It is important that you read, fully understand and observe the following safety precautions and warnings. Careless or improper use of the unit may cause serious or fatal injury.

Read, understand and follow all warnings and instructions in this manual and on the unit.

Always wear eye, head and ear protectors when using this unit.

Do not use metal/rigid blades when this sign is shown on the unit.

Keep all children, bystandards and helpers 15 m away from the unit. If anyone approaches you, stop the engine and cutting attachment immediately.

Be careful of thrown objects.

Guaranteed sound power level

Blade thrust may occur when the spinning blade contacts a solid object in the critical area. A dangerous reaction may occur causing the entire unit and operator to be thrust violently. This reaction is called blade thrust. As a result, the operator may lose control of the unit which may cause serious or fatal injury. Blade thrust is more likely to occur in areas where it is diﬃ cult to see the material to be cut.

Hot Surface – Contact with hot surface can cause serious burns.

The hedge trimmer attachment cannot be used on models with this label.

Indicate handle location. Arrows which show limits for handle positioning.

Shows maximum shaft speed. Do not use the cutting attachment whose max rpm is below the

-1

min

shaft rpm.

Gloves should be worn when necessary, e.g., when assembling cutting equipment.

Use anti-slip and sturdy footwear.

Choke – Run position (Open) Speed of output shaft

Choke – Start position (Closed)

On/Start Fuel tank capacity

Oﬀ /Stop

Emergency stop Cutting attachment

Fuel and oil mixture

Idle speed adjustment

ISO22868

WA, Ra(M)

2000/14/EC

Displacement

Spark plug

Idling speed

Idle

Max. engine output

Dry weight (without fuel, cutting attachment, harness and cutting attachment guard)

Sound pressure level LpA by ISO 22868

pA, eq

Equivalent*

Measured sound power level LwA by 2000/14/ EC Racing

English

WA, Ra(G)

2000/14/EC

hv, eq(F)

Before using your machine

• Read the manual carefully.

• Check that the cutting equipment is correctly assembled and adjusted.

• Start the unit and check the carburetor adjustment. See “MAINTENANCE”.

NOTE: Equivalent noise level / vibration level are calculated as the time-weighted energy total for noise / vibration levels

* 1/2 Idle, 1/2 racing.

WHAT IS WHAT? (Fig. 1)

Since this manual covers several models, there may be some diﬀ erence between pictures and your unit. Use the instructions that apply to your unit.

A: Fuel cap B: Throttle trigger C: Starter handle D: Cutting attachment guard E: Cutting attachment F: Drive shaft tube G: Handle H: Hanger I: Ignition switch J: Harness (if so equipped) K: Throttle trigger lockout L: Choke lever M: Engine N: Gear case O: Combi box spanner P: Handling instructions Q: Goggles R: Hex bar wrench

WARNINGS AND SAFETY INSTRUCTIONS

Pay special attention to statements preceded by the following words:

Indicates a strong possibility of severe personal injury or

CAUTION

Indicates a possibility of personal injury or equipment

NOTE

Helpful information for correct function and use.

Operator safety

○ Wear head protection (1). (Fig. 2) ○ Always wear a safety face shield or goggles (2). (Fig. 2) ○ Wear approved hearing protection (3). (Fig. 2)

Long-term exposure to noise can result in permanent

Pay attention to your surroundings. Be aware of any

Remove safety equipment immediately upon shutting oﬀ

○ Always wear heavy, long-sleeved shirts (4) and long

Do not wear loose clothing, jewelry, short pants, sandals

Secure hair so it is above shoulder length.

Guaranteed sound power level LwA by 2000/14/ EC Racing

Vibration level by ISO 22867 Front or Left handle / Equivalent*

under various working conditions with the following time distribution:

WARNING

loss of life, if instructions are not followed.

damage, if instructions are not followed.

hearing impairment.

bystanders who may be signaling a problem.

engine.

pants (5) and non-slip boots (6) and gloves (7). (Fig. 2)

or go barefoot.

hv, eq(R)

○ Do not operate this tool when you are tired, ill or under

○ Do not operate the tool at night or under bad weather

Working on slippery ground could lead to an accident if

○ Never let a child or inexperienced person operate the

○ Do not start the engine if there are any ﬂ ammables such

○ Never start or run the engine inside a closed room or

○ Keep handles free of oil and fuel. ○ Keep hands away from cutting equipment. ○ Do not grab or hold the unit by the cutting equipment. ○ Gloves should be worn when installing or removing the

○ When the unit is shut oﬀ , make sure the cutting

○ When operation is prolonged, take a break periodically

○ Always operate the tool with proper protective equipment

○ Do not touch the spark plug area or high voltage during

○ Do not allow children near the tool during operation. ○ Do not touch the engine, muﬄ er cover or exhaust vent

○ Antivibration systems do not guarantee that you will

○ If you are using any medical electric/electronic devices

Unit/machine safety

○ Inspect the entire unit/machine before each use.

○ Replace parts that are cracked, chipped or damaged in

○ Make sure the cutting attachment guard and harness are

○ Keep others away when making carburetor adjustments. ○ Use only accessories as recommended for this unit/

Vibration level by ISO 22867 Rear or Right handle / Equivalent*

Uncertainty

the inﬂ uence of alcohol, drugs or medication.

conditions when visibility is poor. And do not operate the tool when it is raining or right after it has been raining.

you lose your balance.

machine.

as dry leaves, waste paper or fuel in the vicinity.

building. Breathing exhaust fumes can kill.

cutting attachment. Failure to do so may result in injury.

attachment has stopped before the unit is set down.

so that you may avoid possible Hand-Arm Vibration Syndrome (HAVS) which is caused by vibration.

WARNING

and clothing. Failure to do so may result in accidents such as burns or injuries. (Fig. 2)

operation. Doing so may result in electric shock.

during or shortly after operation. Doing so may result in burn or injury.

not sustain Hand-Arm Vibration Syndrome or carpal tunnel syndrome. Therefore, continual and regular users should monitor closely the condition of their hands and ﬁ ngers. If any of the above symptoms appear, seek medical advice immediately.

such as a pacemaker, consult your physician as well as the device manufacturer prior to operating any power equipment.

Replace damaged parts. Check for fuel leaks and make sure all fasteners are in place and securely tightened.

any way before using the unit/machine. Faulty parts may increase the risk of accidents and may lead to an injury.

properly attached. Do not operate if cutting attachment guard and harness is not properly attached.

machine by the manufacturer.

English

○ Before operation, make sure that there are no tools such

as the adjustment key or spanner still attached to the unit.

WARNING

○ Never modify the unit/machine in any way. Do not use

your unit/machine for any job except that for which it is intended.

○ Non-authorized modiﬁ cations and/or accessories may

result in serious personal injury or the death of the operator or others.

Fuel safety

○ Mix and pour fuel outdoors and where there are no

sparks or ﬂ ames.

○ Use a container approved for fuel. ○ Move at least 3 m away from fueling site before starting

engine.

○ Stop engine before removing fuel cap. Do not remove

the fuel cap during operation.

○ Empty the fuel tank before storing the unit/machine. It is

recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.

WARNING

○ Fuel is easy to ignite or get explosion or inhale fumes, so

that pay special attention when handling or ﬁ lling fuel.

○ Do not smoke or allow smoking near fuel or the unit/

machine or while using the unit/machine.

○ Wipe up all fuel spills before starting engine. ○ Store unit/machine and fuel in area where fuel vapors

cannot reach sparks or open ﬂ ames from water heaters, electric motors or switches, furnaces. etc.

○ When using the unit in dry areas, make sure that ﬁ re

extinguishing equipment is readily available.

○ If you shut oﬀ the engine for refueling, make sure the unit

has cooled down before adding fuel.

Cutting safety

○ Do not cut any material other than grass and brush. ○ Inspect the area to be cut before each use.

Remove objects which can be thrown or become

entangled.

Do not operate in areas where there are tree roots or

rocks.

○ For respiratory protection, wear an aerosol protection

mask when cutting the grass after insecticide is scattered.

○ Keep others including children, animals, bystanders and

helpers outside the 15 m hazard zone. Stop the engine immediately if you are approached.

○ Please exercise caution as engine startup may be

delayed after pulling the starter handle.

○ Always keep the engine on the right side of your body. ○ Hold the unit/machine ﬁ rmly with both hands. ○ Keep ﬁ rm footing and balance. Do not over-reach.

Losing your balance during work may lead to an injury. ○ Keep all parts of your body away from the muﬄ er and

cutting attachment when the engine is running.

○ Keep cutting attachment below knee level. ○ Please exercise caution when operating in areas where

electrical cables or gas pipes are present.

○ Do not operate the cutting attachment for anything but

clearing grass or bushes. Avoid operations where the cutting attachment may touch water such as puddles or dig into dirt. Failure to do so may result in injury or damage to the unit.

○ Avoid prolonged use at low speed range in which

vibration is high. Doing so may result in engine damage.

○ When relocating to a new work area, or inspecting,

adjusting or exchanging the unit’s cutting attachments, accessories, etc., be sure to shut oﬀ the machine and ensure that all cutting attachments are stopped.

○ Never place the machine on the ground when running. ○ Never touch the cutting attachment when it is rotating. ○ Always ensure that the engine is shut oﬀ and any cutting

attachments have completely stopped before clearing debris or removing grass from the cutting attachment.

○ Always carry a ﬁ rst-aid kit when operating any power

equipment.

○ Turn oﬀ the engine and make sure the cutting attachment

has come to a full stop before removing the unit from your body or before leaving the unit unattended.

○ If you accidentally bump or drop the unit, inspect it

immediately to make sure there are no damage, cracks or deformations.

○ If the tool is operating poorly and produces strange noise

or vibrations, turn oﬀ the engine immediately and ask your dealer to have it inspected and repaired.

Continued use under these conditions could lead to

injury or tool damage.

○ Use in accordance with local laws and regulations.

Maintenance safety

○ Maintain the unit/machine according to recommended

procedures.

○ Disconnect the spark plug before performing

maintenance except for carburetor adjustments.

○ Keep others away when making carburetor adjustments. ○ Use only genuine HITACHI replacement parts as

recommended by the manufacturer.

CAUTION

Do not disassemble the recoil starter. There is a

possibility of personal injury with recoil spring.

WARNING

Improper maintenance could result in serious engine

damage or in serious personal injury.

Transport and storage

○ Carry the unit/machine by hand with the engine stopped

and the muﬄ er away from your body.

○ Allow the engine to cool, empty the fuel tank, and secure

the unit/machine before storing or transporting. Failure to do so may result in ﬁ re or accidents.

○ Empty the fuel tank before storing the unit/machine. It is

recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.

○ Store unit/machine out of the reach of children. ○ Clean and maintain the unit carefully and store it in a dry

place.

○ Make sure engine switch is oﬀ when transporting or

storing.

○ When transporting and storing, either remove the cutting

attachment or place the blade cover over the blade.

○ You have to secure the machine during transport to

prevent loss of fuel, damage or injury.

○ If a warning label cannot be read, peels oﬀ or becomes

indistinct, replace it with a new one. To purchase new

labels, contact Hitachi Authorized Service Centers. If situations occur which are not covered in this manual, take care and use common sense. Contact Hitachi Authorized Service Centers if you need assistance.

SPECIFICATIONS

The SPECIFICATIONS of this machine are listed in the table on page 38.

NOTE

All data subject to change without notice.

ASSEMBLY PROCEDURES

Installation of handle

(1) Loop handle type (Fig. 3) Attach the handle to the drive shaft tube with the angle

towards the engine.

Adjust the location to the most comfortable position

before operation.

Make sure to securely attach the handle with the 2 bolts.

NOTE

If your unit has handle location label (8) on drive shaft

tube, follow the illustration.

(2) Bike handle type (Fig. 4) Remove the handle bracket (9) from the assembly. Place the handle and attach the handle bracket with four

bolts lightly. Adjust to appropriate position. Then attach it ﬁ rmly with the bolts.

Installation of harness

(If so equipped)

WARNING

If the product includes a harness, always make sure to

use it.

Attach the harness hook (10) to the hanger (11) on the drive shaft tube. (Fig. 5) Adjust the length of the harness for easy operation of the tool.

NOTE

You may need to adjust the position of the hangar (11)

to balance the unit. To do so, loosen bolt (12) and adjust the position of hangar (11). After adjusting as necessary, make sure to securely tighten the bolt (12). (Fig. 5)

Installation of cutting attachment guard

WARNING

If an incorrect or faulty guard is ﬁ tted, this may cause

serious personal injury.

CAUTION

Some cutting attachment guards are equipped with

sharp line limiters. Be careful with handling it.

NOTE

○ When using a trimmer head with two piece type cutting

attachment guard, attach the guard extension to the cutting attachment guard, then tighten the bolt (13). (Fig. 6)

○ The guard extension is already attached to the cutting

attachment guard at the time of purchase.

○ The guard bracket may come already mounted to the

gear case on some models.

Align the cutting attachment guard with the guard bracket and secure it to the drive shaft tube, using the bolt and cover bracket. (Fig. 7)

Installation of cutting attachment

WARNING

○ Install the cutting attachment properly and securely as

instructed in the handling instructions.

If not attached properly or securely, it may come oﬀ and

cause serious and/or fatal injury.

○ Do not install or remove cutting attachments while the

engine is running.

○ Always use genuine Hitachi cutting attachments and

metal ﬁ ttings.

Installation of semi-auto cutting head

1. Function Automatically feeds more nylon cutting line when it is

tapped at low rpm (not greater than 4500 min

-1

English

Speciﬁ cations

Type of

Code

attaching

No.

screw

6696454 Female screw

Applicable nylon cord Cord diameter: Φ3.0 mm Length: 2 m Cord diameter: Φ2.4 mm Length: 4 m

2. Precautions

○ The case must be securely attached to the cover. ○ Check the cover, case and other components for cracks

or other damage. ○ Check the case and button for wear. If the wear limit mark (14) on the case is no longer visible

or there is a hole in the bottom (15) of the button, change

the new parts immediately. (Fig. 8) ○ The cutting head must be securely mounted to the unit’s

gear case/cutter case. ○ If the cutting head does not feed cutting line properly,

check that the nylon line and all components are properly

installed. Contact Hitachi Authorized Service Centers if

you need assistance.

WARNING

For Hitachi heads, use only ﬂ exible, non-metallic line

recommended by the manufacturer. Never use wire or

wire ropes. They can break oﬀ and become a dangerous

projectile.

3. Installation (Fig. 9) Insert the allen wrench (16) into the hole of the gear

case/cutter case in order to lock the drive shaft tube. Install cutting head on gear case/cutter case of grass

trimmers/brush cutters. The mounting nut is left-hand-

threaded. Turn clockwise to loosen/counter-clockwise to

tighten.

NOTE

Since the cutter holder cap is not used here, keep it for

when a metal blade is used, if so equipped.

4. Adjusting line length Set the engine speed as low as possible and tap the

head on the ground. The nylon line will be drawn out

about 3 cm with each tap. (Fig. 10) Also, you can extend the nylon line by hand but the

engine must be completely stopped. (Fig. 11) Adjust the nylon line to the proper length of 11–14 cm

before each operation.

Direction of rotation

Counterclockwise

Size of attaching screw

M10xP1.25LH

OPERATING PROCEDURES

Fuel (Fig. 12)

WARNING

○ The trimmer is equipped with a two-stroke engine.

Always run the engine on fuel, which is mixed with oil. Provide good ventilation, when fueling or handling fuel. ○ Fuel is highly ﬂ ammable and it is possible to get seriously

injured when inhaling or spilling on your body. Always pay attention when handling fuel. Always have

good ventilation when handling fuel inside building.

Fuel

○ Always use branded 89 octane unleaded gasoline. ○ Use genuine two-cycle oil or use a mix between 25:1 to

50:1, please consult about the mixture ratio to Hitachi

Authorized Service Centers. ○ If genuine oil is not available, use an anti-oxidant added

quality oil expressly labeled for air-cooled 2-cycle engine

use (JASO FC GRADE OIL or ISO EGC GRADE). Do not

use BIA or TCW (2-stroke water-cooling type) mixed oil.

English

○ Never use multi-grade oil (10 W/30) or waste oil. ○ Never mix fuel and oil in machine’s fuel tank. Always mix

fuel and oil in a separate clean container. Always start by ﬁ lling half the amount of gasoline, which is to be used. Then add the whole amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of gasoline. Mix (shake) the fuel-mix thoroughly before ﬁ lling the fuel tank.

Mixing amount of two-cycle oil and gasoline

Gasoline (Liter)

0.5 10 ——— 20 1 20 ——— 40 2 40 ——— 80 4 80 ——— 160

Fueling

WARNING

○ Always shut oﬀ the engine and let it cool for a few

minutes before refueling.

Do not smoke or bring ﬂ ames or sparks near the fueling

site.

○ Slowly open the fuel tank, when ﬁ lling up with fuel, so

that possible over-pressure disappears.

○ Tighten the fuel tank cap carefully, after fueling. ○ Always move the unit at least 3 m from the fueling area

before starting.

○ Always wash any spilled fuel from clothing immediately

with soap.

○ Be sure to check any fuel leakage after refueling. ○ Before fueling, in order to remove static electricity from

the main body, the fuel container and the operator,

please touch the ground that is slightly damp. Before fueling, clean the tank cap area carefully, to ensure that no dirt falls into the tank. Make sure that the fuel is well mixed by shaking the container, before fueling.

Starting

WARNING

○ Before starting the tool, ensure that the cutting

attachment is not touching any objects or the ground.

Otherwise, the cutting attachment may unexpectedly

rotate and cause an injury. ○ Ensure that the cutting attachment does not rotate while

the engine is idling. If it does rotate, adjust the idle speed

according to the instructions in “Idle speed adjustment” in

the “MAINTENANCE” section. If the cutting attachment

still rotates after this adjustment, immediately stop the

engine and cease use, then bring the tool to the nearest

Hitachi Authorized Service Center.

CAUTION

Ensure that the throttle outer end is in the holder. (1) Starting the cold engine

1. Set ignition switch (17) to ON position. (Fig. 13)

2. Push priming bulb (18) several times so that fuel ﬂ ows

through return pipe (19). (Fig. 14)

3. Set choke lever (20) to START position (closed) (A).

(Fig. 15)

4. Pull recoil starter briskly, taking care to keep the handle

in your grasp and not allowing it to snap back. (Fig. 16)

5. When you hear the engine want to start, return choke

lever to RUN position (open) (B). (Fig. 15)

6. Pull recoil starter briskly again. (Fig. 16)

NOTE

If engine does not start, repeat procedures from 2 to 5.

Two-cycle oil (ml)

Ratio 50:1 Ratio 25:1

7. Then allow the engine about 2–3 minutes to warm up before subjecting it to any load.

8. Check that the cutting attachment does not rotate when the engine is idling.

(2) Starting the warm engine Use only 1, 2, 6 and 8 of the starting procedure for a cold

engine.

If the engine does not start, use the same starting

procedure as for a cold engine.

Cutting

WARNING

○ Always use the harness (if so equipped) and wear the

proper attire and protective equipment when operating the unit. (Fig. 17)

○ Keep others including children, animals, bystanders and

helpers outside the 15 m hazard zone. Stop the engine immediately if you are approached. (Fig. 18)

○ When grass or vines wrap around attachment, stop

engine and attachment and remove them. Continuing operation with grass or vines wrapped around the attachment may result in damages such as early abrasion of the clutch.

CAUTION

Use and points of caution will vary depending on the type

of cutting attachment. For safe use, make sure to follow the instructions and guidelines provided with each type.

NOTE

○ Press the quick release button or pull emergency release

ﬂ ap (If so equipped) in the event of emergency. (Fig. 19)

○ Use in accordance with local laws and regulations. (1) Using a semi-auto cutting head

○ Set the engine at high speed when using this attachment. ○ Cut grass from left to right. The cut grass will be

discharged away from the body, minimizing transfer to your clothes. (Fig. 20)

○ With nylon cord, use about 2 cm of the end of the cord

to cut grass. Using the full length of the cord will reduce rotation speed and make cutting diﬃ cult.

NOTE

Automatically feeds more nylon cutting line when it is

tapped at low rpm (not greater than 4500 min

WARNING

○ This product is equipped with a line limiter that will

automatically cut any excess cord. When operating the unit, do not remove the guard or line limiter.

As the resistance is greater for nylon cords as opposed

to blades, mishandling could increase engine load and result in damage.

○ Do not use with the engine set at low speeds. If the

engine speed is low, grass may wrap around the attachment, causing the clutch to slip which could result in clutch abrasion.

○ With nylon cord cutters, always use over 15 cm of cord.

If the length of the cord is too short, rotation speed will increase and may cause damage to the nylon cord cutter. As the curved drive shaft tube model in particular is not equipped with a deceleration mechanism, the possibility of increased rotation speed for the cutting attachment is high.

Stopping (Fig. 21)

Decrease engine speed and run at an idle for a few minutes, then turn oﬀ ignition switch (17).

WARNING

A cutting attachment can injure while it continues to spin

after the engine is stopped or power control is released. When the unit is turned oﬀ , make sure the cutting attachment has stopped before the unit is set down.

-1

MAINTENANCE

MAINTENANCE, REPLACEMENT OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY ANY NON-ROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.

Carburetor adjustment (Fig. 22)

The carburetor is a precision part that mixes air and fuel, and it is designed to ensure high performance from the engine. Before the tool is shipped from the factory, its carburetor is adjusted during a test run. Only make adjustments if it is necessary because of environmental conditions (the climate or atmospheric pressure), the type of fuel, the type of twocycle oil, etc.

WARNING

○ Because the carburetor is manufactured with a high

degree of precision, do not disassemble it.

○ For this product, the only setting of the carburetor that

can be adjusted is the idle speed (T).

○ Never start the engine without the complete clutch cover

and tube assembled! Otherwise the clutch can come loose and cause personal injuries.

T = Idle speed adjustment screw. Idle speed adjustment (T)

WARNING

○ When the engine is stopped, do not excessively turn

the idle speed adjustment screw (T) in a clockwise direction. Otherwise, when the engine starts, the cutting attachment may unexpectedly rotate and cause an injury.

○ Do not adjust the idle speed adjustment screw (T) for

any reason other than to adjust the idling. Run the engine while adjusting the idling. (1) If the engine stops during idling

Start the engine, and slowly turn the idle speed

adjustment screw (T) in a clockwise direction until it is in

a position at which the engine rotates smoothly. At that

time, ensure that the cutting attachment is not spinning. (2) If the cutting attachment rotates during idling

Slowly turn the idle speed adjustment screw (T) in a

counter-clockwise direction until it is in a position at

which the cutting attachment does not rotate. At that

time, ensure that the rotation of the engine is smooth.

WARNING

If the cutting attachment still rotates after adjustment of

the idle speed adjustment screw (T), immediately stop

the engine and cease use, then contact the nearest

Hitachi Authorized Service Center.

Air ﬁ lter (Fig. 23)

The air ﬁ lter (21) 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.

Loosen the screw (22), then open the air ﬁ lter cover and remove the air 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.

English

Fuel ﬁ lter (Fig. 24)

Remove the fuel ﬁ lter (23) from the fuel tank, and replace it if it is dirty.

NOTE

A blocked fuel ﬁ lter (23) can prevent the supply of fuel and cause a rotation malfunction of the engine.

Spark plug (Fig. 25)

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.

Gear case (Fig. 26)

Check gear case or angle gear for grease level about every 50 hours of operation by removing the grease ﬁ ller plug on the side of gear case. If no grease can be seen on the ﬂ anks of the gears, ﬁ ll the gear case with quality lithium based multipurpose grease up to 3/4. Do not completely ﬁ ll the gear case.

CAUTION

○ Make sure to remove any dirt or grit when attaching the

plug to its original position.

○ Before attempting inspection or maintenance of the gear

case, make sure the case has cooled.

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. 27.

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. 28)

4. Push each line into the stopper holes (26), leaving the loose ends approx. 10 cm in length. (Fig. 29)

5. Insert both loose ends of the line through the cord guide (27) when placing the reel in the case. (Fig. 30)

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 (28) on the case meet the long holes (29) on the cover. Then push the case securely until it clicks into place. (Fig. 31)

7. The initial cutting line length should be approx. 11–14 cm and should be equal on both sides. (Fig. 32)

English

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 the use of 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 Hitachi Authorized Service Centers.

Daily maintenance

○ Clean the exterior of the unit. ○ Check that the harness is undamaged. ○ Check the cutting attachment guard for damage or

cracks. Change the guard in case of impacts or cracks.

○ Check that the cutting attachment is properly centered,

sharp, and without cracks. An oﬀ -center cutting attachment induces heavy vibrations that may damage the unit.

○ Check that the cutting attachment nut is suﬃ ciently

tightened.

○ Check that nuts and screws are suﬃ ciently tightened. ○ Check that the unit is undamaged and free of defects.

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 angle gear is ﬁ lled with grease up to 3/4. ○ 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.

SELECTING ACCESSORIES

The accessories of this machine are listed on page 39.

+ 28 hidden pages

Hitachi CG 24EC, CG 27EC Handling Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual