CG 22EAS(SLP) - Lawn mower HITACHI - Free user manual and instructions

Product Type	Lawn mower (brush cutter/weed trimmer)
Brand	Hitachi
Model	CG 22EAS(SLP)
Engine	2-stroke, 21.1 ml (1.27 cu. in.)
Fuel	Gasoline/oil mixture (25:1 to 50:1)
Fuel Tank Capacity	0.44 L (14.9 fl. oz.)
Dry Weight	4.5 kg (9.9 lbs)
Sound Pressure Level (LpA)	90 dB(A)
Guaranteed Sound Power Level (LwA)	112 dB(A)
Equivalent Vibrations (left/front handle)	6.7 m/s²
Equivalent Vibrations (right/front handle)	4.1 m/s²
Idle Speed	2,800 - 3,200 min⁻¹
Recommended Cutting Speed	Above 6,500 min⁻¹
Cutting Tool Type	Semi-automatic cutting head (nylon line Ø3.0 mm)
Deployed Line Length	11-14 cm (4-11/32" - 5-1/2")
Spark Plug	Champion CJ6 or equivalent
Electrode Gap	0.6 mm (0.024")
Safety Features	Blade guard, harness, on/off switch
Usage	Non-commercial (limited warranty)

Frequently Asked Questions - CG 22EAS(SLP) HITACHI

What fuel to use for the Hitachi CG 22EAS(SLP) lawn mower?

Use a mixture of unleaded gasoline (89 octane) and 2-stroke engine oil in a ratio of 25:1 to 50:1. For California only, a 50:1 ratio is recommended. Never use multigrade or used oil.

How to start the lawn mower?

Turn the switch to ON, press the primer bulb several times, close the choke, then pull the starter cord sharply. At the first signs of firing, open the choke and pull again. Let it warm up for 2-3 minutes before use.

How to adjust the cutting line length?

Tap the cutting head on the ground at low speed (max 4,500 min⁻¹) to advance the line by about 3 cm per tap. You can also extend the line manually after stopping the engine. The ideal length is 11 to 14 cm.

What is the regular maintenance of the air filter?

Clean the air filter daily or more frequently in dusty conditions. Open the cover, wash the filter in warm soapy water, dry it well before reassembling. Replace it if damaged or very dirty.

How to adjust the engine idle speed?

Turn the idle adjustment screw (T) clockwise until the blade starts to turn, then unscrew slightly counterclockwise so the blade stops. Normal idle is 2,800 to 3,200 min⁻¹.

What to do if the cutting line does not advance properly?

Check that the nylon line and all head components are properly installed. Ensure the housing is securely attached and the locking tabs are in place. If the problem persists, contact a Hitachi service center.

What are the important safety precautions?

Always wear safety glasses, a helmet, hearing protection, gloves, and sturdy clothing. Keep children and bystanders more than 15 meters away. Never start the engine in a closed room due to toxic exhaust fumes.

How to lubricate the drive shaft?

Every 20 hours of service, disassemble the flexible shaft, clean it, and apply a generous coat of lithium grease. Reinsert it into the tube and reassemble the gear housing.

What oil to use for the 2-stroke mixture?

Use a quality 2-stroke engine oil, grade JASO FC or ISO EGC. Never use BIA or TCW oils (for water-cooled engines). Follow the proportions indicated on the oil container.

What to do if the blade rotates at idle?

If the blade rotates at idle, reduce the speed by unscrewing the idle adjustment screw (T) counterclockwise until it stops. If the problem persists, take the unit to an authorized Hitachi service center.

USER MANUAL CG 22EAS(SLP) HITACHI

Technical line drawing of a mechanical clamp or lever device labeled CG22EAS (SLP), showing no text or symbols on the diagram itself.

SAFETY INSTRUCTIONS AND INSTRUCTION MANUAL

WARNING

IMPROPER OR UNSAFE use of this power tool can result in death or serious bodily injury!

This manual contains important information about product safety. Please read and understand this manual BEFORE operating the power tool. Please keep this manual available for other users and owners before they use the power tool. This manual should be stored in safe place.

WARRANTY: CG22EAB(SLP) is NOT intended for commercial use, and therefore, NO warranty is provided to their commercial applications and rental applications.

INSTRUCTIONS DE SECURITE ET MODE D'EMPLOI

! AVERTISSEMENT

NOTE: Some units do not carry them.

	Symbols⚠ WARNINGThe following show symbols used for the machine. Be sure that you understand their meaning before use.
	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.		Choke - Run position (Open)
		[TKSH]	Choke - Start position (Closed)
	Read, understand and follow all warnings and instructions in this manual and on the unit.	###	On/Start
	Always wear eye, head and ear protectors when using this unit.		Off /Stop
	Do not use metal/rigid blades when this sign is shown on the unit.	—	Emergency stop
	Keep all children, bystanders and helpers 15 m away from the unit. If anyone approaches you, stop the engine and cutting attachment immediately.		Fuel and oil mixture
			Idle speed adjustment
	Be careful of thrown objects.	###	Priming pump
	Shows maximum shaft speed. Do not use the cutting attachment whose max rpm is below the shaft rpm.	###	Guaranteed Sound power level
	Gloves should be worn when necessary, e.g., when assembling cutting equipment.		Hot surface – Contact with hot surface can cause serious burns.
	Use anti-slip and sturdy footwear.		The hedge trimmer attachment cannot be used on models with this label.
	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 difficult to see the material to be cut.		Indicate handle location. Do not attach handle above this point.
			Indicates blade guard location for a trimmer head or semi-auto cutting head.
Before using your machineRead the manual carefully.Check that the cutting equipment is correctly assembled and adjusted.Start the unit and check the carburetor adjustment. See “MAINTENANCE”.

Contents

WHAT IS WHAT 4

WARNINGS AND SAFETY INSTRUCTIONS ..... 5

WARRANTY 6

SPECIFICATIONS....7

ASSEMBLY PROCEDURES 9

OPERATING PROCEDURES 13

MAINTENANCE 15

WHAT IS WHAT

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

1. Fuel cap
2. Throttle trigger
3. Starter handle
4. Blade guard
5. Cutting attachment
6. Drive shaft tube
7. Handle
8. Ignition switch
9. Harness
10. Throttle trigger lockout
11. Chokelever
12. Engine
13. Angletransmission
    14.Jointcase
14. Combi box spanner
15. Handling instructions

Line drawing of a curved mechanical component with a labeled part (9), no text or symbols present.

WARNING

The engine exhaust from this product contains chemical known to the State of California to cause cancer, birth defects or other reproductive harm.

WARNINGS AND SAFETY INSTRUCTIONS

Operator safety

○ Always wear a safety face shield or goggles.
○ Approved protective goggles comply with standard ANSI Z87.1 in the USA.
○ Always wear heavy, long pants, boots, gloves and a long-sleeve shirt. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. Secure hair so it is above shoulder length.
○ Do not operate this tool when you are tired, ill or under the influence of alcohol, drugs or medication.
○ Never let a child or inexperienced person operate the machine.
○ Wear hearing protection. Pay attention to your surroundings. Be aware of any bystanders who may be signaling a problem. Remove safety equipment immediately upon shutting off engine.
○ Wear head protection.
Never start or run the engine inside a closed environment, such as a room or building. Breathing carbon monoxide exhaust fumes can kill.
○ Keep handles free of oil and fuel.
○ Keep hands away from cutting equipment.
○ Do not grab or hold the unit by the cutting equipment.
○ When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down.
When operation is prolonged, take a break from time to time so that you may avoid possible Hand-Arm Vibration Syndrome (HAVS) which is caused by vibration.

WARNING

● Antivibration systems do not guarantee that you will not sustain Hand-Arm Vibration Syndrome or carpal tunnel syndrome. Therefore, continual and regular users should monitor closely the condition of their hands and fingers. If any symptoms of the above appear, seek medical advice immediately.

- If you are using any medical electric/electronic devices such as a pacemaker, consult your physician as well as the device

manufacturer prior to operating any power equipment.

Unit/machine safety

○ Inspect the entire unit/machine before each use. Replace damaged parts. Check for fuel leaks and make sure all fasteners are in place and securely tightened.
○ Replace parts that are cracked, chipped or damaged in any way before using the unit/machine.
○ Make sure the cutting attachment is properly installed and securely fastened.
○ Make sure the safety guard is properly attached.
- Keep others away when making carburetor adjustments.
○ Use only accessories as recommended for this unit/machine by the manufacturer.

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.

Fuel safety

○ Mix and pour fuel outdoors where there are no sparks and flames.
○ Use a container approved for fuel.
☐ Do not smoke or allow smoking near fuel or the unit/machine or while using the unit/machine and fueling or mixing fuel.
○ Wipe up all fuel spills from the unit.
○ Move at least 10 ft (3 m) away from fueling site before starting engine.
- Slowly remove the fuel cap only after stopping the engine.
○ 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 and fuel in area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces. etc.

WARNING

Fuel is easy to ignite or get explosion or inhale fumes, so that pay special attention when handling or filling fuel.

Cutting safety

○ Do not cut any material other than grass and brush.
○ Clear the area to be cut before each use. Remove objects which can be thrown or become entangled in the cutting attachment.

☐ 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 50 ft (15 m) hazard zone. There is still a risk of injury from thrown object. Bystanders should be encouraged to wear eye protection. Stop the engine immediately if you are approached.
○ Always keep the engine on the right side of your body.
○ Hold the unit/machine firmly with both hands.
- Keep firm footing and balance. Do not overreach.
- Keep all parts of your body away from the muffler and cutting attachment when the engine is running.
○ Keep cutting attachment below waist level.
When relocating to a new work area, be sure to shut off the machine and ensure that all cutting attachments are stopped.
○ Never place the machine on the ground when running.
○ 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 first-aid kit when operating any power equipment.
Never start or run the engine inside a closed room or building and/or near infl ammable liquids. Breathing exhaust fumes can kill.

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.

Transport and storage

○ Carry the unit/machine by hand with the engine stopped and the muffler away from your body.
○ Allow the engine to cool, empty the fuel tank, and secure the unit/machine before storing or transporting in a vehicle.
○ 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 in a vehicle, cover blade with blade cover.

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. Pay special attention to statements preceded by the following words:

WARNING

Indicates a strong possibility of severe personal injury or loss of life, if instructions are not followed.

CAUTION

Indicates a possibility of personal injury or equipment damage, if instructions are not followed.

NOTE

Helpful information for correct function and use.

CAUTION

Do not disassemble the recoil starter. You may get a possibility of personal injury with recoil spring.

WARRANTY

The warranties provided by Hitachi Koki U.S.A., Ltd. are explained in the warranty card enclosed with this product titled “Hitachi Outdoor Power Equipment Limited Warranty”.

Model CG22EAB(SLP) is NOT intended for commercial use, and therefore, NO warranty is provided to their commercial applications and rental applications. Therefore, the two year warranty for “the first commercial end user” and one year warranty for “rental applications” mentioned in the warranty card are provided on CG22EAS(SLP), and CG22EAD(SLP), but NOT on CG22EAB(SLP).

SPECIFICATIONS

Model		CG22EAS (SLP)	CG22EAD (SLP)	CG22EAB (SLP)
	Engine Size (cu. in.) 1.27 (21.1 ml)
	Spark Plug Champion CJ6 or equivalent
	Fuel Tank Capacity (fl . oz) 14.9 (0.44 l)
	Dry Weight (lbs) 9.9 (4.5 kg) 10.6 (4.8 kg) 8.8 (4.0 kg)
	Sound pressure level LpA (dB (A)) Equivalent (ISO22868)	90 90 90
	Measured sound (ISO22868) power level LwA Racing (dB (A))	107 107 107
	Measured sound (2000/14/EC) power level LwA Racing (dB (A))	107 107 107
	Guaranteed (2000/14/EC) sound power Racing level LwA (dB (A))	112 112 112
	Vibration level (m/s2)(ISO7916)
	Equivalent (Front / Left handle)	6.7	7.7	6.5
	Equivalent (Rear / Right handle)	4.1	4.7	6.9
	Uncertainty	1.5	1.5	1.5
	Idling (Front / Left handle)	4.9	4.1	5.3
	Idling (Rear / Right handle)	3.3	3.7	3.8
	Racing (Front / Left handle)	8.0	10.1	7.6
	Racing (Rear / Right handle)	4.7	5.5	8.9
Model		CG24EASP (SL) CG27EASP (SL)
	Engine Size (cu. in.) 1.46 (23.9 ml)	1.64 (26.9 ml)
	Spark Plug Champion CJ6 or equivalent
	Fuel Tank Capacity (fl . oz) 18.3 (0.52 l)
	Dry Weight (lbs) 10.6 (4.8 kg) 11.2 (5.1 kg)
	Sound pressure level LpA (dB (A)) Equivalent (ISO22868)	92 93
	Measured sound (ISO22868) power level LwA Racing (dB (A))	108 110
	Measured sound (2000/14/EC) power level LwA Racing (dB (A))	107 108
	Guaranteed (2000/14/EC) sound power Racing level LwA (dB (A))	108 109
	Vibration level (m/s2)(ISO7916)
	Equivalent (Front / Left handle)	6.2	6.2
	Equivalent (Rear / Right handle)	5.8	7.4
	Uncertainty	1.5	1.5
	Idling (Front / Left handle)	4.2	3.1
	Idling (Rear / Right handle)	3.1	2.0
	Racing (Front / Left handle)	7.7	8.3
	Racing (Rear / Right handle)	7.6	10.4

NOTE

Equivalent noise level/vibration level are calculated as the time-weighted energy total for noise/vibration levels under various working conditions with the following time distribution: 1/2 Idle, 1/2 racing.

* All data subject to change without notice.

ASSEMBLY PROCEDURES

Drive shaft to engine (Fig. 1)

Loosen tube locking bolt (1) about ten turns so that the bolt point will not obstruct drive shaft tube to be inserted. When inserting drive shaft tube, hold the tube locking bolt outward preventing inside fitting from obstructing as well.

Insert the drive shaft into the clutch case of the engine properly until the marked position (2) on the drive shaft tube meets the clutch case.

Some models may come with the drive shaft already installed.

Fig. 1

NOTE

When it is hard to insert drive shaft up to the marked position on the drive shaft tube, turn drive shaft by the cutter mounting end clockwise or counter-clockwise. Tighten tube locking bolt lining up the hole in the shaft tube. Then tighten clamp bolt securely.

Installation of attachment

1. Join the attachment in place of it.
2. Make sure the lock pin (3) fi ts in the location hole (4) of tube and that the tube will not come off. (Fig. 2)
3. Tighten the knob nut (5) securely. (Fig. 2)

Fig. 2

Installation of handle

WARNING

When you use steel/rigid blades on straight shaft trimmers or brush cutters, always use a barrier bar (6) and shoulder harness with the loop handle. (Fig. 3)

Technical line drawing of a mechanical device with two views (top and side), no visible text or symbols

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.

NOTE

If your unit has handle location label on drive shaft tube, follow the illustration.

Remove the handle bracket (7) from the assembly. (Fig. 4)

Place the handles and attach the handle bracket with four bolts lightly. Adjust to appropriate position. Then attach it firmly with the bolts.

Fig. 4

Attach the protection tube to the drive shaft or handle using cord clamps (8). (Fig. 5)

Diagram of a cable or cable connector with labeled parts (no text or symbols present)

Fig. 5

NOTE

If the protection tube is set apart from the handle or pipe, it will be caught by something during operation and it may cause serious injury. Do not set the protection tube apart from the handle or pipe.

Throttle wire / stop cord

Press the upper tab (9) and open the air cleaner cover. (Fig. 6)

Line drawing of a hand holding a mechanical component with labeled parts (no text or symbols present)

Fig. 6

Connect stop cords. (Fig. 7)

Illustration of two types of cable connectors with no text or symbols

Fig. 7

If the throttle outer end (10) is threaded on your unit, screw it and the earth terminal (11) (if so equipped) into the cable adjuster stay (12) all the way, and then tighten this cable end using the adjuster nut (13) against the cable adjuster stay (12).

Connect throttle wire end (14) to carburetor (15) and install swivel cap (16) (if so equipped) where is included in tool bag, onto swivel (15) (Fig. 8).

Some models may come with the parts installed.

Fig. 8

Installation of blade guard (Fig. 9, 10, 10-1, 11)

WARNING

• Do not start or operate unit unless each guard is properly assembled to unit.
• If unit is operated without a sharp line limiters, the line will become too long, the engine will overheat, and engine damage may occur.
• Check sharp line limiters surely cut nylon line when operating.

Two-step illustration of a medical or surgical device with no visible text or symbols

Fig. 9

Technical line drawings of mechanical components, including a bracket and lever assembly (no text or symbols)

Fig. 10
Fig. 10-1

Technical line drawing of a mechanical clamp or bracket assembly (no text or symbols)

Fig. 11

NOTE

The guard bracket may come already mounted to the gear case on some models.

Install the blade guard on drive shaft tube against angle transmission. Tighten the guard bracket firmly so that the blade guard does not swing or move down during operation.

Install the blade guard to the guard bracket, which also secures the guard to the gear case using the two guard mounting screws.

CAUTION

Some blade guards are equipped with sharp line limiters. Be careful with handling it.

When using a trimmer head with two piece type blade guard, attach the guard extension to the blade guard. (Fig. 12)

Illustration of hands holding a device with two arrows indicating downward motion (no text or symbols)

Fig. 12

NOTE

When attaching the guard extension to the blade guard, the sharp line limiter must be removed from the blade guard, (if so installed).
○ If your unit has guard location label on drive shaft tube, follow the indication.
To remove the guard extension, refer to the drawings. Wear gloves as the extension has a sharp line limiter, then push the four square tabs on the guard one by one in order. (Fig. 13)

Fig. 13

Installation of semi-auto cutting head

1. Function

Automatically feeds more nylon cutting line when it is tapped at low rpm (not greater than 4,500 min ^-1 ).

Specifications

Code No.	Type of attaching screw	Direction of rotation	Size of attaching screw
6696454	Female screw	Counterclockwise	M10×P1.25-LH
6696597	Female screw	Clockwise	M8×P1.25-RH

Applicable nylon cord

Cord diameter: 1/8" (Φ3.0 mm) Length: 6.5 ft (2 m)

Cord diameter: 3/22" (Φ2.4 mm) Length: 13 ft (4 m)

1. 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 (17) on the case is no longer visible or there is a hole in the bottom (18) of the button, change the new parts immediately. (Fig. 14)

Fig. 14

• The cutting head must be securely mounted to the unit's gear case.
  For outstanding performance and reliability, always use Hitachi nylon cutting line. Never use wire or other materials that could become a dangerous projectile.
  ○ 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.
• Installation (Fig. 15)
  ○ Install cutting head on gear case of grass trimmers/brush cutters. The mounting nut is left-hand-threaded. Turn clockwise to loosen/ counterclockwise to tighten.

Fig. 15

For curved shaft models, the mounting nut is right-hand-threaded. Turn counterclockwise to loosen/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.
○ Insert Allen wrench (19) into the hole of the gear case in order to lock the cutter holder.

1. 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 1-3/16" (3 cm) with each tap. (Fig. 16)

Technical line drawing of a mechanical clamp or lever mechanism with a downward arrow indicating motion (no text or symbols present)

Fig. 16

Also, you can extend the nylon line by hand but the engine must be completely stopped. (Fig. 17)

Technical line drawing of a mechanical device with a central hub and cable (no text or symbols)

Fig. 17

○ Adjust the nylon line to the proper length of 4-11/32"-5-1/2" (11-14 cm) before each operation.

WARNING

For Hitachi heads, use only flexible, non-metallic line recommended by the manufacturer. Never use wire or wire ropes. They can break off and become a dangerous projectile.

OPERATING PROCEDURES

Fuel (Fig. 18)

Fig. 18

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 contains highly flammable and it is possible to get the serious personal injury 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 the oil bottle for the ratio or Hitachi Authorized Service Centers.
○ Only for the state of California at 50:1.
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.
○ Never use multi-grade oil (10 W/30) or waste oil.
○ Always mix fuel and oil in a separate clean container.

Always start by filing half the amount of fuel, which is to be used. Then add the whole amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of fuel.

Mix (shake) the fuel-mix thoroughly before filling the fuel tank.

Fueling

WARNING

● Always shut off the engine before refueling.
● Slowly open the fuel tank, when filling up with fuel, so that possible over-pressure disappears.
● Tighten the fuel cap carefully, after fueling.
● Always move the trimmer at least 10 ft (3 m) from the fueling area before starting.
● Always wash any spilled fuel from clothing immediately with soap.
- Be sure to check for any fuel leakage after refueling.

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

CAUTION

Before starting, make sure the cutting attachment does not touch anything.

1. Set ignition switch (20) to ON position. (Fig. 19, 20)

Fig. 19

Technical line drawing of a mechanical device with no visible text or symbols

Fig. 20

* Push priming bulb (21) several times so that fuel flows through return pipe (33). (Fig. 21)

Fig. 21

1. Set choke lever (23) to CLOSED position (A). (Fig. 22)

Fig. 22

1. Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it to snap back. (Fig. 23)

Line drawing of a hand using a mechanical device to adjust a circular component (no text or symbols present)

Fig. 23

1. When you hear the engine want to start, return choke lever to RUN position (open) (B). Then pull recoil starter briskly again.

NOTE

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

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

Cutting (Fig. 24, 25, 26)

When cutting, operate engine at over 6,500 min ^-1 . Extended time of use at low rpm may wear out the clutch prematurely.
○ Cut grass from right to left.
○ Cut grass from left to right (only curve shaft model).
○ 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 difficult to see the material to be cut.

○ Wear the harness as shown in the figure (if so equipped). The blade turns counter-clockwise, therefore, be advised to operate the unit from right to left for efficient cutting. Keep onlookers out of working area at least 50 ft (15 m).

Illustration of a worker sweeping debris with tools and arrows indicating surface damage (no text or symbols)

Fig. 24

Line drawing of a person in safety gear holding equipment (no text or symbols)

Fig. 25

Fig. 26

WARNING

If cutting attachment should strike against stones or other debris, stop the engine and make sure that the attachment and related parts are undamaged. When grass or vines wrap around attachment, stop engine and attachment and remove them.

Stopping (Fig. 27, 28)

Decrease engine speed and run at an idle for a few minutes, then turn off ignition switch (20).

Fig. 27

Line drawing of a mechanical device with no visible text or symbols

Fig. 28

For models with an engine ignition switch, keep the ignition switch pressed until the engine comes to a complete stop.

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.

Semi-auto cutting head

When cutting, operate engine at over 6,500 min ^-1 . Extended time of use at low rpm may wear out the clutch prematurely.
○ Cut grass from right to left.
○ Cut grass from left to right (only curve shaft model).

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.

Automatically feeds more nylon cutting line when it is tapped at low rpm (not greater than 4,500 min ^-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. 29)

Line drawing of hands using a tool to adjust or install a mechanical component (no text or symbols visible)

Fig. 29

WARNING

● The cutting attachment may be spinning during carburetor adjustments.
● Never start the engine without the complete clutch cover and tube assembled! 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 basically 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 Iter is clean. Be sure the cutting attachment stop turning when the engine idle. 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 Authorized Service Centers.

NOTE

Standard Idle rpm is 2,800 - 3,200 min ^-1 .

WARNING

When the engine is idling the cutting attachment must under no circumstances rotate.

Air fi Iter (Fig. 30)

The air fi Iter 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.

Technical line drawing of a mechanical component with internal parts and part number 24 (no text or symbols present)

Fig. 30

Cleaning the air filter

Open the air filter cover and the filter (24). Rinse it in warm soap suds. Check that the fi Iter is dry before reassembly. An air fi Iter that has been used for some time cannot be cleaned completely. Therefore, it must regularly be replaced with a new one. A damaged fi Iter must always be replaced.

Fuel filter (Fig. 31)

Drain all fuel from fuel tank and pull fuel fi liter line from tank. Pull fi liter 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.

Line drawing of a hand holding a piston and valve (no text or symbols)

Fig. 31

Spark plug (Fig. 32)

The spark plug condition is influenced by:

○ An incorrect carburetor setting
○ Wrong fuel mixture (too much oil in the gasoline)
○ A dirty air fi Iter
○ 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 0.024" (0.6 mm). The spark plug should be replaced after about 100 operation hours or earlier if the electrodes are badly eroded.

Fig. 32

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. 33)

Flexible drive shaft should be removed and lubricated with good quality lithium grease every 20 hours. To remove the flexible shaft, first remove screw (25), loosen bolt (26) 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 (25) and screw (26).

Fig. 33

Angle transmission (Fig. 34)

Check angle transmission or angle gear for grease level about every 50 hours of operation by removing the grease filler 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.

Simple line drawing of a mechanical device with a lever and base mount (no text or symbols)

Fig. 34

Semi-auto cutting head

Nylon line replacement

(1) Remove the case (27) by firmly pushing inward the locking tabs with your thumbs as shown in Fig. 35.

Fig. 35

(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 (28) 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. 36)

Fig. 36

(4) Push each line into the stopper holes (29), leaving the loose ends approx. 4" (10 cm) in length. (Fig. 37)

Fig. 37

(5) Insert both loose ends of the line through the cord guide (30) when placing the reel in the case. (Fig. 38)

Fig. 38

NOTE

When placing a reel in the case, try to line up the stopper holes (29) with the cord guide (30) for easier line release later.

(6) Place the cover over the case so that the cap locking tabs (31) on the case meet the long holes (32) on the cover. Then push the case securely until it clicks into place. (Fig. 39)

Fig. 39

(7) The initial cutting line length should be approx. 4-11/32"-5-1/2" (11-14 cm) and should be equal on both sides. (Fig. 40)

Fig. 40

Maintenance schedule

Below you will find 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 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 sufficiently tightened.
○ Make sure that the blade transport guard is undamaged and that it can be securely fitted.
○ Check that nuts and screws are sufficiently tightened.

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 0.024" (0.6 mm), or change the spark plug.
☐ Check that the angle gear is filled with grease up to 3/4.
○ Clean the air filter.

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.

SIGNIFICATION DES SYMBOLES

Line drawing of a curved mechanical component with a labeled part (9), no text or symbols present.

ATTENTION

Fig. 1

REMARQUE

Fig. 2

Technical line drawing of two mechanical clamping or lifting devices with directional arrows indicating motion (no text or symbols)

Fig. 3

Fig. 4

Diagram of a mechanical device with labeled parts, showing hoses and connectors (no text or symbols present)

Fig. 5

REMARQUE

Technical line drawing of a hand holding a mechanical component with labeled part '9' (no text or symbols beyond label)

Fig. 6

Illustration of two types of cable connectors with no text or symbols

Fig. 7

Fig. 8

Two-step diagram showing a hand holding a cable with a circular symbol and a crossed-out cable, no text or symbols present.

Fig. 9

Technical line drawings of mechanical components, including a bracket and lever assembly (no text or symbols)

Fig. 10
Fig. 10-1

Technical line drawing of a mechanical clamp or bracket assembly (no text or symbols)

Fig. 11

REMARQUE

Illustration of hands holding a device with arrows indicating downward motion (no text or symbols)

Fig. 12

REMARQUE

Fig. 13

Cordon de nylon applicable

Line drawing of a mechanical lever mechanism with a curved handle and base, showing motion direction (no text or symbols)

Fig. 16

Technical line drawing of a mechanical component with a central hub and cable (no text or symbols)

Fig. 17

Technical line drawing of a mechanical device with no visible text or symbols

Fig. 20

Line drawing of a hand operating a mechanical engine component (no text or symbols)

Fig. 23

Illustration of a worker using a tool to clean or mark debris, with no text or symbols present.

Fig. 24

Line drawing of a person in safety gear holding equipment (no text or symbols)

Fig. 25

Fig. 26

ATTENTION

Line drawing of a mechanical device with no visible text or symbols

Fig. 28

Line drawing of a mechanical assembly with hands operating a tool (no text or symbols)

Fig. 29

ATTENTION

Technical line drawing of a mechanical component with internal parts and part number 24 (no text or symbols present)

Fig. 30

Line drawing of a hand holding an internal combustion engine cylinder (no text or symbols)

Fig. 31

Bougie (Fig. 32)

Fig. 32

REMARQUE

Simple line drawing of a mechanical device with a lever and base mount (no text or symbols)

Fig. 34

Fig. 36

Fig. 37

Fig. 1

NOTA

Fig. 2

Technical line drawing of a mechanical device with two views (top and side), no visible text or symbols

Fig. 3

Fig. 4

Diagram of a mechanical device with labeled parts (no text or symbols present)

Fig. 5

NOTA

Technical line drawing of a mechanical assembly with hands adjusting parts (no text or symbols)

Fig. 6

Conecte los cables de parada. (Fig. 7)

Illustration of two types of cable connectors with no text or symbols

Fig. 7

Fig. 8

Illustration of two mechanical components with no visible text or symbols, showing a hand holding a tool (no text or symbols present)

Fig. 9

Technical line drawing of a mechanical assembly with no visible text or symbols

Fig. 10

Technical line drawing of a mechanical device with no visible text or symbols

Fig. 10-1

Technical line drawing of a mechanical clamp or bracket assembly (no text or symbols)

Fig. 11

NOTA

Illustration of hands holding a device with two arrows indicating downward motion (no text or symbols)

Fig. 12

NOTA

Fig. 13

Line drawing of a mechanical clamp or lever mechanism with a curved handle and base, showing motion direction (no text or symbols)

Fig. 16

Technical line drawing of a mechanical component with a central hub and cable (no text or symbols)

Fig. 17

Technical line drawing of a mechanical device with labeled part '20' (no text or symbols beyond label)

Fig. 20

Line drawing of a hand operating a mechanical pump or motor component (no text or symbols)

Fig. 23

Illustration of a worker using a tool to move debris with arrows indicating movement (no text or symbols)

Fig. 24

Line drawing of a person in safety gear holding equipment (no text or symbols)

Fig. 25

Fig. 26

ADVERTENCIA

Line drawing of a mechanical device with a numbered label '20' pointing to a component (no text or symbols on the device itself)

Fig. 28

Line drawing of a mechanical assembly with hands operating a tool (no text or symbols)

Fig. 29

ADVERTENCIA

Technical line drawing of a mechanical component with internal parts and part number 24 (no text or symbols present)

Fig. 30

Line drawing of a hand holding an internal combustion engine cylinder (no text or symbols)

Fig. 31

Bujía (Fig. 32)

Fig. 32

NOTA

Simple line drawing of a mechanical device with a lever and base mount (no text or symbols)

Fig. 34

Fig. 36

Fig. 37

CG24EASP CG27EASP

CG24EASP / CG27EASP CG22EAS / CG24EASP / CG27EASP

CG22EAD

CG22EAD CG22EAB

CG22EAB

Line drawing of a quill pen with inkwell (no text or symbols)

Line drawing of a quill pen with inkwell (no text or symbols)

WARNING:

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

• Lead from lead-based paints,
• Crystalline silica from bricks and cement and other masonry products, and
• Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

AVERTISSEMENT:

Minato-ku, Tokyo 108-6020, Japan

Distributed by

Hitachi Koki U.S.A., Ltd.

PO Box 970

Braselton, GA 30517

Hitachi Koki Canada Corp.

450 Export Blvd. Unit B,

Mississauga ON L5S 2A4