CG22EAP2 - Grass trimmer HITACHI - Free user manual and instructions

USER MANUAL CG22EAP2 HITACHI

Line drawing of a mechanical device labeled CG 22EAP2 (SL), showing a lever and clamp mechanism without any text or symbols on the device 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: CG22EAP2(SLB) 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)
			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.		Hot surface – Contact with hot surface can cause serious burns.
	Gloves should be worn when necessary, e.g., when assembling cutting equipment.	[OKO]	Indicate handle location.Arrows which show limits for handle positioning.
	Use anti-slip and sturdy footwear.		Indicates cutting attachment guard location for a trimmer head or semi-auto cutting head.
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”.

Contents

WHAT IS WHAT 3

WARNINGS AND SAFETY INSTRUCTIONS ..... 4

WARRANTY 6

SPECIFICATIONS....7

ASSEMBLY PROCEDURES 8

OPERATING PROCEDURES 11

MAINTENANCE 14

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. Cutting attachment guard
5. Cutting attachment
6. Drive shaft tube
7. Handle
8. Hanger
9. Ignition switch
10. Harness (if so equipped)
11. Chokelever
12. Engine
    13.Gearcase
    14.Cuttercase
    15.Jointcase
13. Combi box spanner
14. Handling instructions
    18.Swivelcap
    19.Goggles
15. Hex. bar wrench
16. Muffl er cover

Line drawing of a curved mechanical component with a labeled dimension (10), no text or symbols present.

16 17 19 20 18

CG 22EAP2 (SLB)

CG 22EAP2 (SLD)

CG 22EAP2 (SL)

1 2 3 11 12 21

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

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.

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, non-slip 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 approved hearing protection. Long-term exposure to noise can result in permanent hearing impairment.

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.
Do not operate the tool at night or under bad weather conditions when visibility is poor. And do not operate the tool when it is raining or right after it has been raining.
Working on slippery ground could lead to an accident if you lose your balance.

Do not start the engine if there are any fl ammables such as dry leaves, waste paper or fuel in the vicinity.
Gloves should be worn when installing or removing the cutting attachment. Failure to do so may result in injury.

WARNING

● Always operate the tool with proper protective equipment and clothing. Failure to do so may result in accidents such as burns or injuries.
- Do not touch the spark plug area or high voltage during operation. Doing so may result in electric shock.
- Do not allow children near the tool during operation.
- Do not touch the engine, muffler cover or exhaust vent during or shortly after operation. Doing so may result in burn or injury.
● 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. Faulty parts may increase the risk of accidents and may lead to an injury.
○ Make sure the cutting attachment is properly installed and securely fastened.

○ Make sure the cutting attachment guard and harness are properly attached. Do not operate if cutting attachment guard and harness is not properly attached.
- Keep others away when making carburetor adjustments.
○ Use only accessories as recommended for this unit/machine by the manufacturer.
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 modifications and/or accessories may result in serious personal injury or the death of the operator or others.

Fuel safety

○ Mix and pour fuel outdoors where there are no sparks and flames.
○ Use a container approved for fuel.
○ Move at least 10 ft (3 m) away from fueling site before starting engine.
- Slowly remove the fuel cap only after stopping the engine. 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 and fueling or mixing fuel.
● Wipe up all fuel spills before starting engine.
- 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.
- 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.

☐ 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.
○ 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 firmly with both hands.
○ Keep firm footing and balance. Do not overreach.

Losing your balance during work may lead to an injury.

• Keep all parts of your body away from the muffler 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 first-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 muffler 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 fire 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 situations occur which are not covered in this manual, take care and use common sense. Contact Hitachi Authorized Service Centers if you need assistance.

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 CG22EAP2(SLB) 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 CG22EAP2(SL), and CG22EAP2(SLD), but NOT on CG22EAP2(SLB).

SPECIFICATIONS

Model		CG22EAP2 (SL) CG22EAP2 (SLD) CG22EAP2 (SLB)
	Engine Size (cu. in.) 1.27 (21.1 ml)
	Spark Plug Champion CJ6
	Fuel Tank Capacity (fl . oz) 14.5 (0.43 l)
	Dry Weight (lbs) 9.7 (4.4 kg) 10.4 (4.7 kg) 8.6 (3.9 kg)
	Sound pressure level LpA (dB (A)) Equivalent (ISO22868)	98 98 98
	Measured sound (ISO22868) power level LwA Racing (dB (A))	112 112 112
	Guaranteed (ISO22868) sound power Racing level LwA (dB (A))	115 115 115
	Vibration level (m/s2) (ISO22867)	6.3	7.7	5.5
	Equivalent (Front / Left handle) Equivalent (Rear / Right handle) Uncertainty	5.2	4.7	6.6
		1.5	1.5	1.5

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.

Technical diagram of a mechanical assembly with labeled parts 1 and 2

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 (CG22EAP2 (SLD) only)

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)

Technical diagram of a mechanical assembly with numbered components labeled 3, 4, and 5

Fig. 2

CAUTION

• When you pull and release the lock pin (3), always make sure it returns to its original position.
  ● Always check the label to see if an attachment can be used with a unit.

Installation of handle (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.

Diagram of a mechanical clamp or clamp mechanism with labeled parts and directional arrows indicating motion or force.

Fig. 3

NOTE

If your unit has handle location label (6) on drive shaft tube, follow the illustration.

WARNING

Do not use metal or plastic blade cutting attachments with loop handle type.

Throttle wire / stop cord

Press the upper tab (7) and open the air cleaner cover. (Fig. 4)

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

Fig. 4

Connect stop cords. (Fig. 5)

Line drawing of two types of cable connectors (no text or symbols)

Fig. 5

If the throttle outer end (8) is threaded on your unit, screw it and the earth terminal (9) (if so equipped) into the cable adjuster stay (10) all the way, and then tighten this cable end using the adjuster nut (11) against the cable adjuster stay (10).

Connect throttle wire end (12) to swivel (13) of carburetor and install swivel cap (14) (if so equipped) where is included in tool bag, onto swivel (13) (Fig. 6).

Some models may come with the parts installed.

Technical diagram of a mechanical assembly with numbered components and an inset showing a component labeled 14.

Fig. 6

CAUTION

Open and close the throttle and verify that the swivel (13) abuts against screw (15) when the throttle is closed.

Installation of harness

(If so equipped)

WARNING

If the product includes a harness, always make sure to use it.

Attach the harness hook (16) to the hanger (17) on the drive shaft tube. (Fig. 7)

Adjust the length of the harness for easy operation of the tool.

16 17 18

Fig. 7

NOTE

You may need to adjust the position of the hangar (17) to balance the unit. To do so, loosen bolt (18) and adjust the position of hangar (17). After adjusting as necessary, make sure to securely tighten the bolt (18). (Fig. 7)

Installation of cuttingt attachment guard

WARNING

- Do not start or operate unit unless each guard is properly assembled to unit.

- If an incorrect or faulty guard is fitted, this may cause serious personal injury.

CAUTION

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

Aligning to the position indicated by the guard location label (19), firmly secure the cutting attachment guard to the drive shaft tube with the bolt (20) and guard bracket (21). (Fig. 8)

20 21 19

Fig. 8

(Curved shaft model)

Attach the cutter case to the cutting attachment guard and firmly secure with the bolt and nut. (Fig. 9)

Illustration of two mechanical components with arrows indicating movement, no text or symbols present

Fig. 9

⚠ WARNING

- 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.

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 fittings.

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)

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 (22) on the case is no longer visible or there is a hole in the bottom (23) of the button, change the new parts immediately. (Fig. 10)

22 23

Fig. 10

○ 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 flexible, 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. 11)

Insert the allen wrench (24) 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. The mounting nut is left-hand-threaded. Turn clockwise to loosen/counter-clockwise to tighten.

24

Fig. 11

NOTE

For curved drive shaft tube models, the mounting nut is right-hand-threaded. Turn counterclockwise to loosen/clockwise to tighten.

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 1-3/16" (3 cm) with each tap. (Fig. 12)

Mechanical assembly diagram showing a lever mechanism with a curved arrow indicating motion (no text or symbols present)

Fig. 12

Also, you can extend the nylon line by hand but the engine must be completely stopped. (Fig. 13)

Technical line drawing of a mechanical component with a black arrow pointing to a top circular feature (no text or symbols)

Fig. 13

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

OPERATING PROCEDURES

Fuel (Fig. 14)

25-50 A 1 B

Fig. 14

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.
- Never mix fuel and oil in machine's fuel tank. Always mix fuel and oil in a separate clean container.

Always start by fi ling 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.

Mixing amount of two-cycle oil and gasoline

Gasoline (Liter)	Two-cycle oil (ml)
	Ratio 50:1 Ratio 25:1
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 flames or sparks near the fueling site.
- 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, 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

CAUTION

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

1. Starting the cold engine

(1) Set ignition switch (25) to ON position. (Fig. 15)

25

Fig. 15

(2) Push priming bulb (26) several times so that fuel flows through return pipe (27). (Fig. 16)

26 27

Fig. 16

(3) Set choke lever (28) to START position (closed) (A). (Fig. 17)

1 N 28 A B

Fig. 17

(4) Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it to snap back. (Fig. 18)

Line drawing of a hand operating a mechanical device with a black arrow pointing to the handle (no text or symbols present)

Fig. 18

(5) When you hear the engine want to start, return choke lever to RUN position (open) (B). (Fig. 17)

(6) Pull recoil starter briskly again. (Fig. 18)

NOTE

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

(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, 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. 19)
- Keep others including children, animals, bystanders and helpers outside the 15 m hazard zone. Stop the engine immediately if you are approached. (Fig. 20)
- 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.

Safety warning illustration showing a worker using a safety harness and a circular diagram with safety symbols indicating distance from 50ft.

Fig. 19 Fig. 20

NOTE

Use in accordance with local laws and regulations.

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. 21)
○ Cut grass from right to left as the cutting attachment of the curved drive shaft tube model rotates clockwise.
With nylon cord, use about 3/4" (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.

Diagram illustrating a mechanical device and worker cleaning a surface with directional arrows, likely illustrating environmental or safety measures.

Fig. 21

NOTE

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

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 5-7/8" (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. 22)

Decrease engine speed and run at an idle for a few minutes, then turn off ignition switch (25).

25

Fig. 22

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.

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. 23)

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

Fig. 23

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. 24)

The air filter (29) 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 device interior with no visible text or symbols

Fig. 24

Cleaning the air fi Iter

Open the air filter cover and remove the air filter (29). Rinse it in warm soap suds. Check that the filter is dry before reassembly. An air filter that has been used for some time cannot be cleaned completely. Therefore, it must regularly be replaced with a new one. A damaged filter must always be replaced.

Fuel fi Iter (Fig. 25)

Check the fuel fi Iter occasionally for clogging as insufficient fuel flow could affect engine speed.

Drain all fuel from fuel tank and pull fuel filter (30) from tank. Rinse it in warm water with detergent.

Rinse thoroughly until all traces of detergent are eliminated. Squeeze, away excess water and allow element to air dry.

NOTE

If the fuel fi lter (30) is hard due to excessive dirt buildup, replace it.

Line drawing of a mechanical device with labeled component '30' (no text or symbols beyond label)

Fig. 25

Spark plug (Fig. 26)

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.

0.024" (0.6 mm)

Fig. 26

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. 27)

(curved drive shaft tube model)

Flexible drive shaft should be removed and lubricated with good quality lithium grease every 20 hours. To remove the flexible shaft, first remove screw (31), loosen bolt (32) and remove the cutter case then pull the shaft out of the drive shaft tube. Clean the shaft off and apply a generous coat of lithium grease to it and insert if back into the drive shaft tube, turn it unit it drops into place then install the cutter case, install & tighten screw (31) and bolt (32).

31 32

Fig. 27

Gear case (Fig. 28)

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

Line drawing of a mechanical device with a lever and base, no text or symbols present

Fig. 28

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 (33) by firmly pushing inward the locking tabs with your thumbs as shown in Fig. 29.

33

Fig. 29

(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 (34) 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. 30)

4" (10 cm) 34

Fig. 30

(4) Push each line into the stopper holes (35), leaving the loose ends approx. 4" (10 cm) in length. (Fig. 31)

4" (10 cm) 35 4"

Fig. 31

(5) Insert both loose ends of the line through the cord guide (36) when placing the reel in the case. (Fig. 32)

35 36

Fig. 32

NOTE

When placing a reel in the case, try to line up the stopper holes (35) with the cord guide (36) for easier line release later.

(6) Place the cover over the case so that the cap locking tabs (37) on the case meet the long holes (38) on the cover. Then push the case securely until it clicks into place. (Fig. 33)

38 37

Fig. 33

(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. 34)

4-11/32"-5-1/2" (11-14 cm) 4-11/32"-5-1/2" (11-14 cm)

Fig. 34

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 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 cutting attachment 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.
○ Check that nuts and screws are sufficiently 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 0.024" (0.6 mm), or change the spark plug.

○ Check that the angle gear is filled with grease up to 3/4.
○ Clean the air fi iter.

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.

TROUBLESHOOTING

Use the inspections in the table below if the tool does not operate normally. If this does not remedy the problem, consult your dealer or the Hitachi Authorized Service Center.

Condition Cause Remedy
Engine does not start	Fuel system	Fuel tank is empty or fuel level is low	Fill the fuel tank with the correct fuel mix (25:1-50:1)
		Fuel tank contains old fuel (off ensive odor)	Replace with new fuel
		Too much fuel is absorbed and spark plug is wet	1. Disconnect the spark plug and allow to dry2. Pull the starter handle 5 or 6 times to remove the surplus fuel3. Attach the spark plug4. Set the choke lever to RUN position and pull the starter handle
		Fuel filter is clogged with dirt	Clean the fuel filter
		Fuel pipe is bent or disconnected	Ensure that the fuel flows smoothly
		Carburetor malfunction	Contact Hitachi Authorized Service Centers
	Electrical system	Stop switch lead has short-circuited	Contact Hitachi Authorized Service Centers
		Spark plug is dirty Replace or clean	the spark plug
		Electrode gap is too big Adjust the gap to 0.6 mm	gap to 0.6 mm
		Poor connection between high tension cable and spark plug	Reconnect
		Electrical system malfunction	Contact Hitachi Authorized Service Centers
	Other	Muffl er exhaust port is clogged with carbon	Contact Hitachi Authorized Service Centers for repair
Engine starts but cuts out straightawayEngine is apt to cut out	Fuel system	Fuel tank is empty or fuel level is low	Fill the fuel tank with the correct fuel mix (25:1-50:1)
		Fuel tank contains old fuel (off ensive odor)	Replace with new fuel
		Two-cycle oil has not been added	Contact Hitachi Authorized Service Centers
		Choke lever is in START position Set the choke lever to RUN position
		Air has got into fuel system Reconnect the fuel pipe or joint
		Carburetor malfunction	Contact Hitachi Authorized Service Centers
	Electrical system	Ignition failure
		Spark plug failure Replace with new spark plug
		Electrical system failure	Contact Hitachi Authorized Service Centers
	Other	Engine overheating
		Wrong spark plug model	Replace with designated part See “SPECIFICATIONS”
		Dirty air cleaner Clean
		Carbon clogging (muffl er exhaust port)	Clean
		Insuffi cient compression (piston, piston ring, cylinder)	Contact Hitachi Authorized Service Centers
Abnormal vibration		Cutting attachment is not properly installed	See “Installation of cutting attachment”
		Handle, handle bracket or other fastening part is loose	Check and tighten
		Grass is wrapped round gear case	Remove grass
Engine is running but blade does not moveMovement is poor		Grass is wrapped round gear case	Remove grass and dirt
Engine does not stop Stop switch failure			Set the choke lever to START position to stop the engineCease use immediately and contact Hitachi Authorized Service Centers
Engine stops when throttle is closed		Idle speed is too low	Contact Hitachi Authorized Service Centers
Blade continues rotating when throttle is closed		Idle speed is too highThrottle wire is too taut	Contact Hitachi Authorized Service Centers

SIGNIFICATION DES SYMBOLES

Line drawing of a curved mechanical component with a labeled dimension (10), no text or symbols present.

CARACTÉRISTIQUES 25

MONTAGE 26

UTILISATION....29

ENTRETIEN 32

CG 22EAP2 (SLB)

CG 22EAP2 (SLD)

CG 22EAP2 (SL)

Labeled diagram of a mechanical device with numbered parts for identification

ATTENTION

Technical diagram of a mechanical device with labeled parts 1 and 2, showing assembly or assembly steps.

Fig. 1

REMARQUE

Technical diagram of a mechanical assembly with numbered components labeled 3, 4, and 5

Fig. 2

ATTENTION

Diagram of a mechanical or electrical device with labeled components and directional arrows indicating motion or force.

Fig. 3

REMARQUE

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

Fig. 4

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

Fig. 5

Technical diagram of a mechanical assembly with numbered components and an inset showing a component labeled 14.

Fig. 6

ATTENTION

Diagram showing two mechanical components with arrows indicating movement, no text or symbols present

Fig. 9

⚠ AVERTISSEMENT

Cordon de nylon applicable

Mechanical assembly diagram showing a lever mechanism with a curved arrow indicating motion (no text or symbols)

Fig. 12

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

Fig. 13

Line drawing of a hand operating a mechanical engine component with a black arrow indicating the tool (no text or symbols present)

Fig. 18

Safety warning illustration showing a worker using a tool to ensure 15m distance from 30ft to 40ft, with a circular hazard symbol and no warning.

Fig. 19 Fig. 20

REMARQUE

Diagram illustrating a mechanical device and worker cleaning a circular component, with directional arrows indicating motion or flow.

Fig. 21

REMARQUE

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

Fig. 23

⚠ AVERTISSEMENT

Technical line drawing of a mechanical component with internal parts and part number 29 (no text or symbols present)

Fig. 24

Technical line drawing of a mechanical device with labeled component '30' (no text or symbols beyond label)

Fig. 25

Bougie (Fig. 26)

0.024" (0.6 mm)

Fig. 26

REMARQUE

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

Fig. 28

ATTENTION

4" (10 cm) 34

Fig. 30

4" (10 cm) 35 4" (10 cm)

Fig. 31

la

Technical diagram of a mechanical device with numbered components for identification

ADVERTENCIA

Technical diagram of a mechanical device with labeled parts 1 and 2, showing assembly or assembly steps.

Fig. 1

NOTA

Technical diagram of a mechanical assembly with numbered components labeled 3, 4, and 5

Fig. 2

PRECAUCIÓN

Diagram of a mechanical clamp or clamp mechanism with labeled parts and directional arrows indicating motion or force.

Fig. 3

NOTA

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

Fig. 4

Conecte los cables de parada. (Fig. 5)

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

Fig. 5

Technical diagram of a mechanical assembly with numbered components and a magnified inset showing component 14.

Fig. 6

PRECAUCIÓN

Illustration of two mechanical components with no visible text or symbols, showing a switch mechanism (no text or symbols present)

Fig. 9

ADVERTENCIA

Mechanical assembly diagram showing a lever mechanism with a curved arrow indicating motion (no text or symbols)

Fig. 12

Technical line drawing of a mechanical component with a black arrow pointing to a top circular feature (no text or symbols)

Fig. 13

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

Fig. 18

Safety warning illustration showing a person using a rope and safety symbols including distance markers and hazard signs

Fig. 19 Fig. 20

NOTA

Diagram illustrating a mechanical device and worker using a tool to measure a circular motion or workpiece, with directional arrows indicating motion direction.

Fig. 21

NOTA

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

Fig. 23

ADVERTENCIA

Technical line drawing of a mechanical component with internal parts and part number 29 (no text or symbols present)

Fig. 24

Line drawing of a mechanical device with labeled component '30' (no text or symbols beyond label)

Fig. 25

Bujía (Fig. 26)

0.024" (0.6 mm)

Fig. 26

NOTA

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

Fig. 28

PRECAUCIÓN

4" (10 cm) 34

Fig. 30

4" (10 cm) 35

Fig. 31

Exploded view diagram of a mechanical assembly with numbered components and labeled parts A, B, and C.

CG22EAP2 (SL) CG22EAP2 (SLD)

Technical diagram of a mechanical assembly with numbered components and exploded views, including parts like gears, shafts, and housing.

Technical diagram of a mechanical assembly with numbered components and exploded view, including labeled parts like 'C' and numbered parts 187–229.

CG22EAP2 (SLB)

Technical diagram of a mechanical assembly with numbered components and exploded views

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