Hitachi CG 40EBF, CG 40EBFL Handling Instructions Manual

Backpack Brush Cutter
Desbrozadora de mochila
Roçadora dorsal

CG 40EBF (L)

Read the manual carefully before operating this machine.
Antes de utilizar esta máquina, lea cuidadosamente el manual.
Leia o manual atentamente antes de operar esta máquina.

Handling instructions
Instrucciones de manejo
Instruções de uso

123

10

8

1

5

2

6

7

3

4

5

2

9

10

456

16

11

12

14

13

15

78

2

910

11 12 13

A

B

17

14 15 16

B

C

A

17 18 19

19

T

A

B

20

18

3

20 21 22

23

4

MEANINGS OF SYMBOLS

NOTE: Some units do not c arry them.

Symbols

WARNING

The foll owing show symbols used for the machine. B e sure that you understand their meaning before use.

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

min

Shows ma ximum shaft s peed. Do not
use the cutting attachment whose max

-1

speed is below th e shaft speed.

English

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

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

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

Be careful of thrown obje cts.

Contents

WHAT IS WHAT .................................................................................6

WARNINGS AND SAFET Y INSTRUCTIONS ...................................7

SPECIFICATIONS .............................................................................8

ASSEMBLY PROCEDURES ..............................................................8

OPERATING PROCEDURES ............................................................8

MAINTEN AN CE .................................................................................9

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

Use anti-slip and sturdy foot wear.

Blade thrust may occur when the
spinning blade contacts a solid obje ct
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.

5

English

WHAT IS WHAT

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.

1. Fuel ca p

2. Throttle lever

3. Ignition switch

4. Blade guard

5. Cutting attachment

6. Dr ive shaft tube

7. H a n d l e

8. Harness

9. Clutch case

10. Starter handle

11. Fuel cock

12. Choke lever

13. Engine

14. Angle transmission

15. Combi b ox spanner

16. Handling instructions

514

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6

4

2

12

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13

9

15

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16

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6

English

WARNINGS AND SAFETY INSTRUCTIONS

Operator safety

○ Always wear a safet y face shield or goggles.
○ Always wear heavy, long pants, boots and gloves. Do not wear

loose clothing, jewelry, short pants, sandals or go barefoot.
Secure hair so it is above sh oulder length.

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

infl uence of alcohol, dr ugs or medication.

○ Never let a c hild 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 room or building.

Breath ing exhaust fumes can kill.

○ Keep handles free of oil and fuel.
○ Keep hands away from cutting equipment.
○ Do not gra b or hold the unit by the cut ting equipme nt.
○ When the unit is turned off , make sure the cut ting at tachment

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 c aused by vibrat ion.

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 fi ngers. If any symptoms of the
above appear, seek medical advic e 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 operat ing 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 ar e cracked, chipped or damaged in any way

before using the unit/machi ne.

○ Make sure t he safety guard is properly at tached.
○ 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 and where there are no sparks or

fl ames.

○ Use a container approved for 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.
○ Move at lea st 3 m away from fueling site before starting engine.
○ Stop engine before removing fuel cap.
○ 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 t he tank, store so fuel will not leak.

○ 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.

WARNING

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

pay special attention when handling or fi lling fuel.

Cutting safety

○ Do not cut any material other than grass and brush.
○ Do not perform any operations which may infl uence an

enorm ous shock on the cutting att achment.

Other wise, the fl ex ible shaft may risk to be damage d.

○ Inspect the area to be cut before each use. Remove objects

which can be thrown or become ent angled.

○ 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.

○ Always keep the driver shaf t tube 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.
○ Keep all parts of your body away from the muffl er and cutting

attac hment when the engine is running.

○ Keep cut ting attachment below waist level.
○ When relocating to a new work area, be sure to shut off the

machine and ensure that all cut ting attach ments 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 gras s from the cutting attachment.

○ Always carry a fi rst-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 par ts as recommended

by the man ufacturer.

Transpor t 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 transpor ting in a vehicl e.

○ 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 t he tank, store so fuel will not leak.

○ Store unit/machine out of the reach of children.
○ Clean and maint ain the unit carefully and store it in a dry place.
○ Make sure engine switch is off when transporting or storing.
○ When transporting in a vehic le, cover blade with blade cover.

If situations occur which are not covered in this manual, take care
and use common sense. Contact your Hitachi dealer 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 possibilit y

of personal injury with recoil spring.

7

English

SPECIFICATIONS

Model CG40EBF (L)

Engine Size (ml) 39.8

Spark Plug NGK BPMR6A

Fuel Tank
Capacity (l)

Dry Weight (kg) 9.6

NOTE

* All data is subject to change without notice.

1.2 0

ASSEMBLY PROCEDURES

Drive shaft to fl exible shaft (Fig. 1)

Remove joint pipe bolt (1),
Insert the fl exible shaft (2) into the joint pipe (3) of Drive Shaft to the
end and tighten the joint pipe bolt (1) by engaging the bolt to the slot
(4) of fl exible shaft.

NOTE

Make sure to align square end of fl exible inner shaft (5) with

square hole of drive shaft by slightly rotating drive shaft, so that
they are connec ted fi rmly.

Flexible shaf t to engine (Fig. 2)

Lift fl exible-shaft lock pin (6) .
Insert fl exible shaft (2) into clutch case to the end by inserting
square end of fl exible inner shaft (3) into square hole of adaptor in
clutch case.
Release the lock pin to lock the fl exible shaft by lining up the lock
pin and the hole (7) of fl exible shaft.

Throttle cable and stop cord (Fig. 3)

Connect throttle cables (8) by hooking each cut end of the cables
and clamp the jointed part with connector case (9) which locks.
Connect each end of stop c ords (10).

NOTE

○ When removing connector case, insert coin or minus driver in

slot in th e middle and twist it.

○ Fix protection tube on drive shaft or handle using cord clamps

(11). (Fig. 4)

○ Check that the carburetor throttle returns to the idle position

and also that it can be opened wide by operating the throttle
lever.

Installation of handle (Fig. 5)

Remove the handle bracket (12).
Set the handle on, and attach the handle bracket (12) with two
screws slightly. And adjust position of the handle according to your
working style. Then fi x it fi rmly with the screws.

Installation of blade guard (Fig. 6)

Align the notch hole (14) of the gear case with the hole (15) of the
gear case cover (13) to install the gear case cover with 3 screws.
Install the blade guard on drive shaft tube against angle
transmission (16). Tighten the guard bracket fi rmly so that the blade
guard does not swing or move down during operation.
Install the gear case and blade guard so that blade guard contacts
the gear case. (Fig. 7)

8

CAUTION

The blade guard must be in place when operating.
If the blade guard is not in place when operating, you may get

the serious injury.

Installation of cutting blade (Fig. 8)

When installing a cutting blade, make sure that there are no cracks
or any damage in it and that the cutting edges are facing the correct
direction.
Align the notch hole of the cutter holder with the hole on the gear
case cover and insert the Allen wrench to stop turning. Turn the
fi xing nut clockwise and remove the fi xing nut, cutter holder cap,
and toothed lock washers.
The installation of the cutting blade is as follows: insert the Allen
wrench into the notch hole of the cutter holder and the hole on
the gear case. Then, install the cutting blade (check the installing
direction, as referring to Fig. 10), the cutter holder cap and toothed
lock washers onto the cutter holder in this order. Finally, tighten the
fi xing nut securely by turning counterclockwise with the Combi box
spanner. (Fig. 8)

CAUTION

○ When installing the cutting blade, set its center hole to the

convex part of the cutter holder and hold it with the concave
surface of the cutter holder cap. Then, tighten the fi xing nut to
prevent the cutting blade from being eccentric. (Fig. 9)

After installing the cutting blade, be sure to remove the Allen

wrench and Combi box spanner.

○ Before operation, make sure the blade has been properly

installed.

○ Before operation, check the cut ter holder cap under the cutting

blade for wear or cracks. If any damage or wear is found,
replace it, as it is an article of consumption.

NOTE

The blade must be retained with a new cotter pin each time

installed. (Fig. 8)

OPERATING PROCEDURES

Fuel (Fig. 11)

WARNING

○ The backpack brush cutter is equipped with a two-stroke

engine. Always run the engine on fuel, which is mixed with oi l.
Provide good ventilation, when fueling or handling fuel.
○ Fuel is highly fl ammable and toxic and can result in serious

injur y if it is inhaled or comes into contact with your skin. Always

handle fuel with care. Always have good ventilation when

handling fuel inside building.

Fuel

○ Always use branded 89 oct ane 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 Hi tachi dealer.
○ If genuine oil is not available, use an anti-oxidant added qualit y

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-grad e oil (10 W/30) or wa ste oil.
○ 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 fi lling the fuel tank.

Fueling

WARNING

○ Always shut off the engine before refueling.
○ Slowly open the fuel tank, when fi lling up with fuel, so that

possible over-pressure disappears.

○ Tighte n the fuel cap carefully, after fue ling.
○ Always move the backpack brush cutter at least 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.

English

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

Open the fuel cock (17). (Fig. 12-B)
Move the throttle lever to start p osition A. (Fig. 14)

NOTE

Starting with full throttle causes sudden high revolution of

Blade, which is dangerous, so please avoid it.

Set the choke lever (18) to CLOSED position. (Fig. 13-A)
Pull the recoil starter briskly, TAKING CARE TO KEEP THE
HANDLE in your grasp, while not allowing it to snap back.
When you hear combustible sounds a couple of times, move the
choke lever to OPEN position. Then pull the recoil starter briskly
again.
After starting the engine, allow it about 2 - 3 minutes to warm up
before subjecting it to any load.

CAUTION

Blade may turn and fl exible shaft may swing as engine starts.

Do not let the blade touch any object when engine starts.

After starting the engine, wear the backpack.

Cutting (Fig. 15, 16)

○ When cutting, operate engine at over 6500 min

time of use at low rpm may wear ou t the clutch prematurely.

○ Cut grass from right to left.
○ When working on a slope, the blade should allow the contour

from top to bottom, with th e operator looking down to the left.

○ 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.

○ The blade turns counter-clockwise, therefore, be advised to

operate the unit from right to lef t for effi cient cutting. Keep
onlookers out of working area at least 15 m.

WARNING

○ If the cut ting attachment should strike stones or other debris,

stop the engine and make sure that the attachment and related
parts are undamaged. When grass or vines wrap around
attac hment, stop engine and attachment and remove them.

Stopping (Fig. 17)

Decrease engine speed and run at an idle for a few minutes, then
turn off ignition switch (19).
After stoppin g the engine, close the fuel cock (17). (Fig. 12-A)

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.

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. Extended

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. 18)

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 factor y, 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 lter is clean. When the idle speed is correct, the
cutting attachment will not rotate. If adjustment is required, close
(clockwise) the T-screw, with the engine running, until the cutting
attachment starts to rotate. Open (counter-clockwise) the screw
until the cutting attachment stops. You have reached the correct
idle speed when the engine runs smoothly in all positions well
below th e rpm when the cutting attachment starts to rotate.
If the cutting attachment still rotates after idle speed adjustment,
contact your Hitachi dealer.

NOTE

Standard Idle rpm is 2500– 3000 min

WARNING

When the engine is idling the cutting attachment must under no

circumstances rotate.

Air fi lter (Fig. 19)

The air fi lter must be cleaned from dust and dirt in order to avoid:

○ Carburetor malfunctions
○ Starting problems
○ Engine power reduction
○ Unnecessar y wear on the engine parts
○ Abnormal fuel consumption

Clean the air fi lter daily or more often if working in exceptionally
dusty areas.

Cleaning the air fi lter

Remove the air fi lter cover and the fi lter (20). 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 repl aced.

Spark plug (Fig. 20)

The spark plug condition is infl uenced by:

○ An incorrect carburetor setting
○ Wrong fuel mixture (too much oil in the gasoline)
○ A dirt y air fi lter
○ Hard running conditions (such a s 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 necessar y. 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.

Muffl er (Fig. 21)

Remove the muffl er and clean out any excess carbon from the
exhaust port or muffl er inlet every 100 hours of operation.

Cylinder (Engine cooling) (Fig. 22)

The engine is air cooled, and air must circulate freely around engine
and over cooling fi ns on cylinder head to prevent overheating.
Every 100 operating hours, or once a year (more often if conditions
require), clean fi ns and external surfaces of engine of dust, dirt and
oil deposits which can contribute to improper cooling.

NOTE

Do not operate engine with engine shroud or muffl er guard

removed as this will cause overheating and engine damage.

Angle transmission (Fig. 23)

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

Flexible shaft

When lubricating fl exible shaft, apply grease in the fl exible pipe of
clutch case side. (It is recommended to apply grease after every 15­20 hours of use.)

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9