Trench Badger Pro 12 Operators Manual Ver R.5

Owner’s Manual
TrenchBadger®
PRO series
English
Please read the operator’s manual carefully and make sure you understand
the instructions before using the machine.
© 2016 TrenchBadger, Inc. — All Rights Reserved.
Ver R.5
1
CONTENTS
CONTENTS ................................................................................2
FUELING ........................................................................... 14
INTRODUCTION.........................................................................3
Oxygenated Gasoline.................................................. 14
Dear customer, ...................................................................3
Alkylate Gasoline ........................................................ 14
SAFETY AWARENESS .................................................................4
Fuel Mixture ............................................................... 14
A FEW WORDS ABOUT SAFETY ...........................................4
Filling the Tank ........................................................... 14
SYMBOLS ............................................................................4
STARTING THE ENGINE ..................................................... 15
THE OPERATOR’S MANUAL .................................................5
Starting Warm Engine................................................. 15
ENVIRONMENTAL AND OPERATIONAL WARNINGS.............5
Breaking-in the Engine ............................................... 15
IMPORTANT MESSAGE TO EMPLOYERS ..............................6
STOPPING THE ENGINE ..................................................... 15
STATE AND LOCAL REQUIREMENTS ....................................6
GENERAL WORKING INSTRUCTIONS ................................. 16
GENERAL SAFETY PRECAUTIONS .........................................6
Preparation for Trench/Bed Cutting ........................... 16
FUEL HANDLING..................................................................7
Safety Harness Adjustment ........................................ 16
OPERATIONAL SAFETY ........................................................7
Basic Safety Rules ....................................................... 16
Kickout..........................................................................8
Check Before Starting ................................................. 16
Maintaining Control ......................................................8
WORKING TECHNIQUES .................................................... 17
First Aid Kit ...................................................................8
Trenching ................................................................... 17
Machine Safety Equipment ...........................................8
Bed Cutting ................................................................. 17
Throttle Lockout ...........................................................9
MAINTENANCE ....................................................................... 18
Stop Switch ...................................................................9
CARBURETOR ADJUSTMENT ............................................. 18
Trenching Deflector ......................................................9
Idle Speed Adjustment ............................................... 18
Vibration Damping........................................................9
FUEL FILTER ...................................................................... 19
Centrifugal Clutch .......................................................10
AIR FILTER ......................................................................... 19
Harness Strap .............................................................10
STARTER UNIT................................................................... 19
ASSEMBLY ...............................................................................11
ENGINE ............................................................................. 19
PRODUCT AND COMPONENT VIEWS ................................11
SPARK PLUG...................................................................... 19
Accessories and Layouts .............................................11
MUFFLER .......................................................................... 20
PRODUCT ASSEMBLY ........................................................13
GEARBOX .......................................................................... 20
Assembly of the Top Deflector....................................13
DEFLECTORS ..................................................................... 20
Assembly of the Gearbox ............................................13
CONTINUAL MAINTENANCE ADVISABLE ........................... 20
Assembly of the Front Deflector .................................13
TROUBLESHOOTING ............................................................... 21
Assembly of the V-Trench Blades................................13
STORAGE ................................................................................ 23
Assembly of the Handle ..............................................13
TECHNICAL DATA .................................................................... 23
OPERATION .............................................................................14
2
INTRODUCTION
Dear customer,
Congratulations on your selected TrenchBadger product! We are certain you will be pleased with your purchase of
one of the finest handheld trenchers/bed cutters on the market.
TrenchBadger is the first to bring a hand held, stand-up ergonomic trencher/bed cutter to the outdoor power
equipment consumers for both the lawn and garden and building and construction industry, with safety and quality as
our highest priority.
We are convinced that you will appreciate the quality and performance of our product for many projects to come. The
purchase of one of our products gives you access to professional help for operational guidance and repair and
service whenever this may be necessary.
We want to help you get the best results from your new trencher/bed cutter and to operate it safely. This manual contains the
information on how to do that - please read it carefully. Think of this operator′s manual as a valuable document. By following
its′ content (assembly, environmental awareness, operation, maintenance, etc.) the life span and the second-hand value of
the machine can be extended. If you lend, rent or sell this machine, make sure that the new operator receives the owner′s
manual.
Thank you for using a TrenchBadger product.
TrenchBadger has a policy of continuous development and product improvement and therefore reserves the right to
modify the design and appearance of products without prior notice.
Best Wishes,
TrenchBadger, Inc.
3
SAFETY AWARENESS
SAFETY AWARENESS
A FEW WORDS ABOUT
SAFETY
Your safety, and the safety of others, is very
important. And using this trencher/bed cutter safely
is an important responsibility.
To help you make informed decisions about safety,
we have provided operating procedures and other
information on labels and in this manual. This
information alerts you to potential hazards that
could hurt you or others.
Of course, it is not practical or possible to warn you
about all the hazards associated with operating or
maintaining a trencher/bed cutter. You must use
your own good judgment.
You will find important safety information in a variety
of forms, including:
• Safety Labels—on the trencher/bed cutter.
Your manual contains special
messages to bring attention to
potential safety concerns,
machine damage as well as
helpful operating and servicing
information. PLEASE READ
ALL THE INFORMATION
CAREFULLY TO AVOID
INJURY AND MACHINE
DAMAGE.
When operating this equipment,
always wear:
 A protective helmet where there
is a risk of falling objects
 Approved hearing protection
 Approved eye protection
Wear non-slip, heavy-duty
protective gloves when operating
and handling the blades.
• Safety Messages—preceded by a safety alert
symbol and one of three signal words: DANGER,
WARNING, or CAUTION.
• Safety Headings—such as IMPORTANT
SAFETY INFORMATION.
• Safety Section—such as TRENCHER SAFETY.
• Instructions—how to use this trencher/bed cutter
correctly and safely.
This entire book is filled with important safety
information—please read it carefully!
Note: Illustrations and specifications
in this manual may vary according to
Country requirements and are subject to
change without notice by the
manufacturer.
Wear safety shoes or boots having
skid-proof sole and anti-piercing /
steel toed inserts.
Watch out for thrown objects and
ricochets.
The operator of the machine must
ensure, while working, that no
persons or animals come closer
than 50ft (15m).
SYMBOLS
These signal words mean the following, if you don’t
follow instructions:
You WILL be KILLED
or SERIOUSLY HURT
You CAN be KILLED
or SERIOUSLY HURT
You CAN be HURT
Kickback - Machine can be thrown
violently up or to the side when the
blade comes into contact with a
fixed object. The blade is capable
of amputating an arm or leg.
Always keep people and animals
at least 50ft (15m) from the
machine.
4
SAFETY AWARENESS
THE OPERATOR’S MANUAL
Your operator’s manual is for your protection.
READ IT. Keep it in a safe place for reference.
Know what you are doing before you begin
assembly of the unit. Proper preparation and
upkeep go hand-in-hand with satisfactory
performance of the trencher/bed cutter and safety.
Contact your dealer or the distributor for your area if
you do not understand any of the instructions in this
manual. In addition to the operating instructions,
this manual contains paragraphs that require your
special attention.
!
!
ENVIRONMENTAL AND
OPERATIONAL WARNINGS
!
WARNING: To ensure safe and
correct operation of the trencher/bed
cutter, this operator’s manual should
always be kept with or near machine.
!
WARNING: Allow only persons who
understand this manual and have had
proper training to operate your
trencher/bed cutter.
!
!
!
WARNING: A trencher/bed cutter can
be dangerous if used incorrectly or
carelessly, and can cause serious or
fatal injury to the operator or others.
It is extremely important that you
read and understand the contents of
this operator’s manual.
!
!
WARNING: Muffler surfaces are very
hot during and after operation of the
trencher/bed cutter, keep all body
parts away from the muffler. Serious
burns may occur if contact is made
with the muffler.
WARNING: Long-term exposure to
noise can result in permanent
hearing impairment. So always use
approved hearing protection.
WARNING: Exposure to vibrations
through prolonged use of gasoline
powered hand tools could cause blood
vessel or nerve damage in the fingers,
hands, and wrists of people prone to
circulation disorders or abnormal
swellings. Prolonged use in cold
weather has been linked to blood
vessel damage in otherwise healthy
people. If symptoms occur such as
numbness, pain, loss of strength,
change in skin color or texture, or loss
of feeling in the fingers, hands, or
wrists, discontinue the use of this tool
and seek medical attention.
WARNING: The engine exhaust from
this product contains chemicals known
to the State of California to cause
cancer, birth defects or other
reproductive harm. Operate your
trench/bed cutter outdoors only in a
well ventilated area.
WARNING: Under no circumstances
may the design of the machine be
modified without the permission of
the manufacturer. Always use
genuine accessories. Non-authorized
modifications and/or accessories can
result in serious personal injury or
the death of the operator or others.
WARNING: The ignition system
produces an electromagnetic field of
a very low intensity. This field may
interfere with some pacemakers. To
reduce the risk of serious or fatal
injury, persons with pacemaker
should consult their physician and
the pacemaker manufacturer before
operating this tool.
5
SAFETY AWARENESS
IMPORTANT MESSAGE TO
EMPLOYERS
As an employer, you have a special responsibility to
the people who work for you. Before you ask
anyone to operate this trencher/bed cutter, you
need to determine whether the operator is capable
and strong enough to safely handle and control the
trencher/bed cutter.
If you decide he/she is, make sure the employee(s)
read and understand all instructions and warnings
in this manual and on the labels before operating
the trencher/bed cutter.
Allow adequate time for hands-on training by a
qualified instructor, and personally supervise
practice sessions, until you feel sure the employee
is ready to operate the trencher/bed cutter.
Also, be sure employees wear proper clothing, eye
and hearing protection, and any other gear that may
be required by local ordinances or your insurance
company.
Remember, too, that you are responsible for
keeping the trencher/bed cutter properly maintained
and in safe operating condition.
Your commitment to safety on the job can help
prevent accidents and result in longer and more
productive years of service.
STATE AND LOCAL
REQUIREMENTS
The engine is NOT equipped with a
Spark Arrester System complying with the
requirements of SAE Recommended
Practice J335 and California Codes 4442 and 4443.
All national forest land and land managed by the
states of California, Maine, Washington, Idaho,
Minnesota, New Jersey and Oregon require internal
combustion engines to be equipped with a spark
arrester screen by law. Other states and federal
agencies are enacting similar regulations.
Operating this engine in a state or locale where
such regulations apply, could result in a violation of
the law.
• Major cases of trencher/bed cutter accidents
happen when the blade or thrown objects hits the
operator. While working with the trencher/bed
cutter, always use safety protective approved
clothing. The use of protective clothing does not
eliminate injury risks, but reduces the injury effects
in case of accident. Consult your trusted clothing
supplier to choose equipment in compliance with
legislation. The clothing must be proper and not an
obstacle. Wear adherent protective clothing.
Protective jackets and dungarees leggings are
ideal. Do not wear loose clothing, scarves, ties or
bracelets. Tie up and protect long hair (example
with foulards, cap, helmets, etc.). Safety boots
having skidproof sole and anti-piercing insert.
Wear protective goggles or face screens. Use
protections against noises: for example, noise
reduction ear guards or earplugs. The use of
protections for the ear requires much more
attention and caution, because the perception of
audible warning signals (screaming, alarms, etc.)
is limited. Always remove your hearing protection
as soon as the engine stops. Wear gloves that
permit the maximum absorption of vibrations.
• Check the trencher/bed cutter each day to ensure
that each device, whether for safety or otherwise,
is functional.
• Never use a damaged, modified, or improperly
repaired or assembled trencher/bed cutter. Do not
remove damage or deactivate any of the safety
devices. Always replace cutting tools or safety
devices immediately if it becomes damaged,
broken or is otherwise removed.
• Carefully plan your operation in advance. Do not
begin cutting until you have a clear work area,
secure footing, and a planned retreat path.
• The trencher/bed cutter must only be used for
trenching to appropriate depths or bed edging. It is
unadvisable to perform other types of uses.
GENERAL SAFETY
PRECAUTIONS
• Do not handle or operate a trencher/bed cutter
when you are fatigued, ill, or upset, or if you have
taken alcohol, drugs, or medication. You must be
in good physical condition and mentally alert.
Trencher/bed cutter work is strenuous. If you have
any condition that might be aggravated by
strenuous work, check with your doctor before
operating a trencher/bed cutter. Be more cautious
before rest periods and towards the end of your
shift.
6
SAFETY AWARENESS
FUEL HANDLING
!
WARNING: The engine exhaust from
this product contains chemicals
known to the State of California to
cause cancer, birth defects or other
reproductive harm. Operate your
trench/bed cutter outdoors only in a
well ventilated area.
• Never place the trencher/bed cutter in a
combustible area such as dry leaves, straw,
paper, etc.
• Store the unit and fuel in an area where fuel
vapors cannot reach sparks or open flames from
water heaters, electric motors or switches,
furnaces, etc.
• Never take the cap off the tank when the engine is
running.
• Never use fuel for cleaning operations.
!
!
!
WARNING: Fuel and fuel fumes can
cause serious injury when inhaled or
allowed to come in contact with the
skin. For this reason observe caution
when handling fuel and make sure
there is adequate ventilation.
WARNING: Beware of carbon
monoxide poisoning.
WARNING: Mufflers fitted with
catalytic converters get very hot
during use and remain so for some
time after stopping. This also applies
at idle speed. Contact can result in
burns to the skin. Remember the risk
of fire!
• To reduce the risk of fire and burn injury, handle
fuel with care. It is highly flammable.
• Mix, store and transport fuel in a container
approved for gasoline.
• Mix fuel outdoors where there are no sparks or
flames.
• Select bare ground, stop engine, and allow cooling
before refueling.
• Loosen fuel cap slowly to release pressure and to
keep fuel from escaping around the cap.
• Tighten fuel cap securely after refueling. Unit
vibration can cause an improperly tightened fuel
cap to loosen or come off and spill quantities of
fuel.
• Wipe spilled fuel from the unit and allow remaining
fuel to evaporate. Move 10 feet (3 m) away from
refueling site before starting engine.
• Take care not to get fuel on your clothing. If you
have spilt fuel on yourself or your clothes, change
your clothes. Wash any part of your body that has
come in contact with fuel. Use soap and water.
OPERATIONAL SAFETY
!
WARNING: Always hold the
trencher/bed cutter with both hands
when the engine is running. Use a
firm grip with thumbs and fingers
encircling the trencher/bed cutter
handles.
• Keep all parts of your body away from the cutting
attachment when the engine is running.
• Always carry the trencher/bed cutter with the
engine stopped and the muffler away from your
body. When transporting your trencher/bed cutter,
carry from appropriate handles. When transporting
in a vehicle, keep blades covered. Properly secure
your trencher/bed cutter to prevent turnover, fuel
spillage and damage.
• Do not operate a trencher/bed cutter with one
hand! Serious injury to the operator, helpers,
bystanders, or any combination of these persons
may result from one-handed operation. A
trencher/bed cutter is intended for two-handed
use.
• Shut off the engine before setting down the
trencher/bed cutter. Do not leave the engine
running unattended.
• Only use the trencher/bed cutter in well-ventilated
places, do not operate the trencher/bed cutter in
explosive or flammable atmospheres or in closed
environments. Beware of carbon monoxide
poisoning.
• Always cut from a firm-footed and safe position on
the ground.
• Never attempt to burn off spilled fuel under any
circumstances.
• Do not smoke while handling fuel or while
operating the trencher/bed cutter.
!
WARNING: Take great care when
working on sloping ground.
• Store fuel in a cool, dry, well ventilated place.
7
SAFETY AWARENESS
• Do not cut near electric cables.
!
WARNING: Call you local utilities
before you dig. Find the local 811 call
center in the U.S.
• Keep the handles dry, clean, and free of oil or fuel
mixture.
• Never cut with the trencher/bed cutter above
ground level.
• Never use the trencher/bed cutter without blade
deflector.
Kickout
Recognize that kickout can happen. With a basic
understanding of kickout, you can reduce the
element of surprise which contributes to accidents.
!
WARNING: Avoid kickout which can
result in serious injury. Kickout is the
sideward, or sudden forward motion
of the machine occurring when the
blade contacts any object such as a
log or stone, or when the wood
closes in and pinches the saw blade
in the cut. Contacting a foreign
object can also result in loss of
brush cutter control.
First Aid Kit
Always have a first aid kit nearby.
Machine Safety Equipment
This section describes the machine′s safety equipment,
its purpose, and how checks and maintenance should
be carried out to ensure that it operates correctly. See
the Assembly section to locate where this equipment is
positioned on your machine.
The life span of the machine can be reduced and the
risk of accidents can increase if machine maintenance
is not carried out correctly and if service and/or repairs
are not carried out professionally. If you need further
information please contact your nearest service
workshop.
!
Maintaining Control
• Keep a good, firm grip on the brush cutter with
both hands when the engine is running and don’t
let go. A firm grip will help you reduce kickout and
maintain control of the brush cutter. Keep your
fingers encircling the handle.
• Stand with your weight evenly balanced on both
feet.
!
IMPORTANT! All servicing and repair
work on the machine requires special
training. This is especially true of the
machine′s safety equipment. If your
machine fails any of the checks
described below you must contact
your service agent. When you buy
any of our products we guarantee the
availability of professional repairs
and service. If the retailer who sells
your machine is not a servicing
dealer, ask him for the address of
your nearest service agent.
WARNING: Never use a machine with
faulty safety equipment. The
machine’s safety equipment must be
checked and maintained as described
in this section. If your machine fails
any of these checks contact your
service agent to get it repaired.
• Do not overreach. You could be drawn or thrown
off balance and lose control of the brush cutter.
!
WARNING: As a trencher/bed cutter
user, do not solely rely on the
product’s safety features. You must
follow all safety precautions,
instructions, and maintenance in this
manual to help avoid serious injury.
• Position of handlebars, designed with correct
distance with each other. The spread and position
of the hands provided by this design work together
to give balance and resistance in controlling the
machine.
8
SAFETY AWARENESS
Throttle Lockout
The throttle lockout is designed to prevent
accidental operation of the throttle control. When
you press the lock (A) (i.e. when you grasp the
handle) it releases the throttle control (B). When you
release the handle the throttle control and the
throttle lockout both move back to their original
positions. This movement is controlled by two
independent return springs. This arrangement
means that the throttle control is automatically
locked at the idle setting.
Stop Switch
Use the stop switch to switch off the engine.
Start the engine and make sure the engine stops
when you move the stop switch to the stop setting.
A
B
Trenching Deflector
Make sure the throttle control is locked at the idle
setting when the throttle lockout is released.
This deflector is intended to prevent loose objects from
being thrown towards the operator. The deflector also
protects the operator from accidental contact with the
cutting blades. See
Check that the deflector is undamaged and not
cracked. Replace the deflector if it has been
exposed to impact or is cracked.
Press the throttle lockout and make sure it returns to
its original position when you release it.
!
WARNING: Never use a cutting
attachment without an approved
deflector. If an incorrect or faulty
deflector is fitted, this can cause
serious personal injury.
Vibration Damping
Your machine is equipped with a vibration damping
system that is designed to minimize vibration and
make operation easier.
Check that the throttle trigger and throttle lockout
move freely and that the return springs work
properly.
The machine′s vibration damping system reduces
the transfer of vibration between the engine
unit/cutting equipment and the machine′s handle
unit.
Regularly check the vibration damping units for
cracks or deformation.
9
SAFETY AWARENESS
Centrifugal Clutch
Your equipment is fitted with a centrifugal clutch that
engages and disengages the engine from the
attachment and blades based on throttle.
When throttle is applied, the clutch is engaged and
rotational power is transferred to the blades.
When the throttle is released, the clutch begins to
disengage and remove power transfer to the blades.
!
WARNING: THE CUTTING ATTACHMENT
SHOULD NEVER TURN AT IDLE. Turn the
idle speed screw “T” counter-clockwise to
reduce the idle RPM, or contact a
Servicing Dealer for adjustment and
discontinue use until the repair is made.
Serious personal injury may result from
the cutting attachment turning at idle.
A damaged clutch may cause a cutting attachment to
rotate at idle speed and increase the risk of personal
injury from loss of control and from contact with the
cutting tool.
Harness Strap
Your equipment comes with a Harness Strap that
permits the trench/bed cutter to be properly balanced
and at an appropriate height from the ground.
Check that the harness strap is correctly positioned
over the far shoulder and across the chest to support
the balanced weight of the machine.
10
ASSEMBLY
PRODUCT AND COMPONENT VIEWS
Accessories and Layouts
3
1
2
Figure 1
Figure 2
8
9
5
7
4
6
Figure 3
Figure 4
16
5
15
8
14
10
11
13
18
17
12
Figure 5
11
ASSEMBLY
20
19
21
18
29
Stop Line
28
30
24
22
23
26
25
27
Figure 5
1-2. Supplied Tools
12. Throttle Lever
21. Bolt and Washer (2x)
3. Harness
13. Throttle Trigger Lockout
22. Blade Arbor Washer (2x)
4-5. Handle and Mounting Screws
14. Half-throttle Button
23. Blade Nut RH (LH thread)
6. Fuel Cap
15. Choke Lever
24. Blade Nut LH (RH thread)
7. Fuel Purge Bulb
16. Spark Plug
25. RH V-Trench Blade
8. Pull Start Handle
17. Air Filter
26. LH V-Trench Blade
9. Muffler Guard
18. Engine Pole
27. Blade Spacer (optional)
10. Harness Attachment
19. Front Deflector
28. Gearbox with Front Plate
11. STOP Button
20. Wing Nut (2x)
29. Top Deflector
30. Set Screws (2x)
12
ASSEMBLY
PRODUCT ASSEMBLY
!
!
WARNING: Always stop the engine
before doing any work on the
trench/bed cutter. The attachment
continues to rotate even after the
throttle has been released. Ensure that
the cutting attachment has stopped
completely and disconnect the HT lead
from the spark plug before you start to
work on it.
WARNING: After use the bevel gear may
be very hot, always wear protective
gloves when performing maintenance.
Assembly of the Top Deflector
Loosen the Deflector Screw and slide Top Deflector
(29) onto Engine Pole (18) to desired height.
Position and tighten.
!
!
WARNING: Never use machine
without an approved safety
deflector. If an incorrect or faulty
deflector is fitted, this can cause
serious personal injury.
WARNING: The deflector provided
with your trench/bed cutter may not
protect the operator from all
foreign objects (gravel, glass, wire,
etc) thrown by the rotating cutting
attachment. Thrown objects may
also ricochet and strike the
operator.
Assembly of the Gearbox
Slide Gearbox (28) onto Engine Pole (18) until
Drive Shaft is fully engaged into Gearbox. Confirm
full engagement to Stop Line on Engine Pole.
With engine sitting flat to ground level, align bottom
of Gearbox flat to ground level. Tighten (2x) side
Set Screws to torque (1/4 turn past figure tight) –
Set Screws to align with holes in Engine Pole.
Then tighten (2x) Pole Clamp screws on Gearbox
evenly until to torque (1/4 turn past figure tight).
Assembly of the V-Trench Blades
Tools needed: Inside Blade Wrench; Outside Nut
Wrench.
Remove and clean all debris/dirt on blade
components before assembly. Install V-trench
Blades (25-26) on respective sides where cutting
teeth are facing forward and inward.
Note: If Blade teeth hit Front Plate or Engine Pole,
install optional Blade Spacer (27) to offset.
Install Blade Arbor Washer (22) and then
respective Blade Nut (23 or 24) on either side and
hand tighten.
Engage Inside Blade Wrench behind Blade and
let free end hit the ground. Using a Nut Wrench,
torque each side to 60Ft-lbs.
Note: RH side is a left hand thread.
!
WARNING: Properly assemble the blade
washers and apply proper torque to
Blade Nuts. Serious personal injury may
result from the blades loosening during
operation.
If proper torque is not possible,
discontinue use until the repair is made.
!
WARNING: Always discard a blade that
is bent, twisted, cracked, broken or
damaged in any other way. Never
attempt to straighten a twisted blade so
that it can be reused. Only use original
blades of the specified type.
!
WARNING: Never touch or adjust the
blade while the motor is running. The
blade is very sharp; always wear
protective gloves when performing
maintenance.
Assembly of the Handle
Fit the Handle (5) onto the Engine Pole (18) and
secure using the (4x) screws (4). The handle
position is calculated depending on the
requirements of the operator.
Assembly of the Front Deflector
Install Bolt and Washer (21) under Top Deflector
bracket and Front Plate. Install Front Deflector (19)
with proper orientation. Thread on Castle Nuts and
tighten.
13
OPERATION
FUELING
condensed out of humid air or be a contaminant in
the fuel system, including tank.
The use of oxygenated gasoline may cause the
occurrence of vapor-lock easier.
Alkylate Gasoline
Do Not Smoke!
This product is powered by a 2-cycle engine and
requires pre-mixing gasoline and 2-cycle oil. Pre-mix
unleaded gasoline and 2-cycle engine oil in a clean
container approved for gasoline.
RECOMMENDED FUEL: THIS ENGINE IS
CERTIFIED TO OPERATE ON UNLEADED
GASOLINE INTENDED FOR AUTOMOTIVE
USE WITH AN OCTANE RATING OF 89 ([R +
M] / 2) OR HIGHER.
Mix 2-Cycle Engine Oil with gasoline according to the
instructions on the package. We strongly recommend
the use of 2% (50:1) Efco Two Cycle Engine Oil,
which is specifically formulated for all Efco air-cooled
two-stroke engines.
The correct oil / fuel proportions shown in the table
below are suitable when using the Efco Two Cycle
Engine Oil or an equivalent high quality engine oil
(JASO specification FD or ISO specification L-EGD).
When oil specifications are NOT equivalent or
unknown use 4% (25:1) fuel / oil mixing ratio.
!
!
!
CAUTION: DO NOT USE AUTOMOTIVE
OIL OR 2-CYCLE OUTBOARD OIL.
CAUTION:
- Match your fuel purchases to your
consumption; don’t buy more than you
will use in one or two months;
- Store gasoline in a tightly-closed
container in a cool, dry place.
CAUTION: For the mixture, never use a
fuel with an ethanol percentage higher
than 10%; gasohol (mixture of gasoline
and ethanol) up to 10% ethanol or E10 fuel
are acceptable.
!
Fuel Mixture
2-Cycle Engine Oil (25:1) 4%
Gasoline
1 Gallon (US)
1 Liter
Oil
5.2 oz.
40 cc (40 ml)
2-Cycle Engine Oil (50:1) 2%
Gasoline
1 Gallon (US)
1 Liter
Oil
2.6 oz.
20 cc (20 ml)
Filling the Tank
!
WARNING: Follow safety instruction for
fuel handling. Always shut off engine
before fuelling. Never add fuel to a
machine with a running or hot engine.
Move at least 10 feet (3 m) from refuelling
site before starting engine. DO NOT
SMOKE!
1.
Clean surface around fuel cap to prevent
contamination.
2.
Loosen fuel cap slowly.
3.
Carefully pour fuel mixture into the tank.
Avoid spillage.
4.
Prior to replacing the fuel cap, clean and
inspect the gasket.
5.
Immediately replace fuel cap and hand
tighten. Wipe up any fuel spillage.
Oxygenated Gasoline
When using an oxygenated gasoline, a good practice
of fuel management is necessary.
Gasoline oxygenated with alcohol readily takes up
water when it is present; the water may be
CAUTION: Alkylate fuels have A different
density than normal fuel. Therefore
engines, set with normal fuel, need
different H jet regulation to avoid critical
issues. For this operation, it’s necessary
to be turned at a Licensed Service Dealer.
!
WARNING: Check for fuel leaks. If any are
found, correct before use. Contact a
Servicing Dealer if necessary.
14
OPERATION
BASIC OPERATOR TIPS
1.
Wear non-slip gloves for maximum grip and
protection.
2.
Maintain a proper grip on the trencher/bed cutter
whenever the engine is running. The fingers
should encircle the handlebar and the thumb is
wrapped under the handlebar.
6.
Pull the starter cord to start the engine.
7.
Once the machine is started, warm up the
machine for few seconds, without touching the
throttle lever. The machine could need more
seconds to warm up with cold weather or at high
altitudes.
!
STARTING THE ENGINE
Place the brush cutter on level ground and ensure
that no objects or obstructions are in immediate
vicinity which could come in contact with the cutting
attachment.
1.
Place the trencher/bed cutter on the ground in a
stable position. Check that the blade is free.
2.
Slowly push the purge bulb 6 times (Fig.4, (7))
3.
Pull the choke lever (Fig. 5, (15)) in the CLOSE
position (A)
!
CAUTION:
- Never wrap the starter cord around your
hand.
- When pulling the starter rope, do not use
the full extent of the rope as this can cause
the rope to break.
- Do not let starter rope snap back. Hold
the starter handle and let the rope rewind
slowly.
WARNING: Do not trench/cut with the
choke lever at the CLOSE
position. Do not operate with the
starting throttle lock engaged.
Cutting with the starting throttle lock
engaged does not permit the
operator proper control.
Starting Warm Engine
Follow above starting instructions, but do not use the
CLOSE position (A) for start up again.
Breaking-in the Engine
NOTE: It is normal for smoke to be emitted from a
new engine during and after first use.
The engine reaches the maximum power after
5-8 hours of activity.
4.
Hold the body of the machine on the ground
using your left hand (CAUTION! Not with your
foot!). Pull the starter rope until the first kick over
of the engine is heard (no more than 3 pulls). A
new unit may require additional pulls.
During this period of breaking-in, do not make the
machine function idly at full throttle, to avoid
excessive functioning stress.
Keep the engine at full throttle the entire time you are
trenching/cutting.
!
CAUTION: During the break-in
period, do not vary the carburetion to
obtain a presumed power increment;
the engine can be damaged.
STOPPING THE ENGINE
Set the throttle lever to idle position and wait a few
seconds to let the engine cool off.
Turn off the engine, pushing the ON/OFF switch (Fig.
4, (11)).
5.
Push the choke lever in OPEN position
15
OPERATION
GENERAL WORKING
INSTRUCTIONS
!
WARNING: This section describes
the basic safety precautions for
working with the trencher/bed cutter.
If you encounter a situation where
you are uncertain how to proceed,
you should ask an expert. Contact
your dealer or your service
workshop. Avoid all usage which you
consider to be beyond your
capability. You must understand the
difference between trenching and
bed cutting before use.
Preparation for Trench/Bed Cutting
!
WARNING: The trencher/bed cutter is to
be used at ground level with the cutting
attachment perpendicular to the ground.
Use above ground level or with the cutting
attachment parallel to the ground may
increase the risk of injury. Never use your
trencher/bed cutter as a hedge/tree
trimmer or outside its intended use.
2.
Do not use the machine in bad weather, such as
dense fog, heavy rain, strong wind, intense cold,
etc. Working in bad weather is tiring and often
brings added risks, such as icy ground,
unpredictable felling direction, etc.
3.
Make sure you can move and stand safely.
Check the area around you for possible
obstacles (roots, rocks, branches, ditches, etc.)
in case you have to move suddenly. Take great
care when working on sloping ground.
4.
Switch off the engine before moving to another
area.
5.
Never put the machine down with the engine
running.
6.
Always use the correct equipment.
7.
Make sure the equipment is well adjusted.
8.
Follow the safety precautions.
9.
Organize your work carefully.
10. Always use full throttle when starting to cut with
the blade.
11. Always use sharp blades.
12. Avoid large stones/rocks.
Check Before Starting
!
WARNING: Neither the operator of the
machine nor anyone else may attempt to
remove cut material while the engine is
running or the cutting equipment is
rotating, as this can result in serious
injury.
Stop the engine and cutting equipment
before you remove material that has
wound around the blade/equipment as
otherwise there is a risk of injury.
Safety Harness Adjustment


Prior to operation, adjust and fit Safety Harness
(Fig. 2). Lift both trencher/ bed cutter and Safety
Harness Strap. Slip Safety Harness over far
shoulder and across chest. Adjust harness at
buckle as to carry partial load of machine.
Safety Harness should not interfere with Throttle
Control or operational movement of machine.
• Check the blades are free to rotate without binding
to each other or gearbox.
• Check the blades to ensure that no cracks have
formed at the bottom of the teeth or by the centre
hole. Discard a blade if cracks are found.
• Check that the blade washers are not cracked due
to fatigue or due to being tightened too much. Discard
the washer if it is cracked.
• Ensure the blade locking nuts have not lost their
captive force. The tightening torque of the locking nut
should be 37 ftlb (50 Nm).
• Check Deflector and Bikini for cracks and proper
mounting.
!
WARNING: Always discard a blade that is
bent, twisted, cracked, broken or damaged
in any other way. Never attempt to
straighten a twisted blade so that it can be
reused. Only use original blades of the
specified type.
Basic Safety Rules
1.
Look around you:
• To ensure that people, animals or other things
cannot affect your control of the machine.
• To ensure that people, animals, etc., do not
come into contact with the cutting attachment or
loose objects that are thrown out by the cutting
attachment.
16
OPERATION
WORKING TECHNIQUES
!
WARNING: Watch out for thrown objects.
Always wear approved eye protection.
Never lean over the cutting attachment
guard. Stones, rubbish, etc. can be thrown
up into the eyes causing blindness or
serious injury. Stop the machine
immediately if anyone approaches. Never
swing the machine around without first
checking behind you to make sure no-one
is within the safety zone.
Trenching

Once equipment is started and engine is at idle,
lift both trencher/ bed cutter and Safety Harness
(Fig. 2). Slip Safety Harness over far shoulder
and across chest. Confirm harness carry’s partial
load of machine.

To begin trenching, start with the machine at full
throttle and ease the blades into the soil until half
the blade is in ground.

Work systematically, forward, down, and
backwards, trenching 3-5in of additional soil with
each motion until depth is reached.

Continue forward, down, and backwards
trenching from bottom of trench depth to the top,
excavating another segment of soil.

With each forward and down trench, take a step
backwards and pull trencher towards operator.
Bed Cutting

Remove one of the trenching blades and reinstall
blade washer and lock nut. Re-torque lock nut to
be 37 ft-lb (50 Nm).

Once equipment is started and engine is at idle,
lift both trencher/ bed cutter and Safety Harness
(Fig. 2). Slip Safety Harness over far shoulder
and across chest. Confirm harness carry’s partial
load of machine.

At which ever end of the bed is easiest, start with
the machine at full throttle and ease the blade
into the soil until half the blade is in ground.

Carefully walk backwards following the bed line
and excavate soil.
17
MAINTENANCE
!
WARNING: Always wear protective
gloves during maintenance
operations. Do not carry out
maintenance with the engine hot.
!
WARNING: Never repair damaged
cutting attachments by welding,
straightening or modifying the shape.
This may cause parts of the cutting
tool to come off and result in serious
or fatal injuries.
CARBURETOR
ADJUSTMENT
Before adjusting the carburetor, clean the cover vents
and air filter as shown in Illustration. Refer to
Maintenance-Air Filter Sections for details.
WARNING: Don’t try to force the
screws outside the range!
!
WARNING: Don’t modify the
carburetor in any way in such case
the engine will not run in
compliance with emissions
regulations.
!
Idle Speed Adjustment

If the engine starts, runs, and accelerates but will
not idle; turn the idle speed screw “T” clockwise
to increase idle speed.

If the cutting attachment turns at idle, turn the
idle speed screw “T” counterclockwise to reduce
the idle RPM and stop the cutting attachment
movement. If the cutting attachment still moves
at idle speed, contact a Servicing Dealer for
adjustment and discontinue use until the repair is
made.

Screw L must be adjusted so that the engine
promptly responds to sharp accelerations and
gives good idle operation.

Screw H must be adjusted so that the engine
gives maximum power during the cutting phase.
Allow the engine to warm up prior to carburetor
adjustment.
!
WARNING! If the idle speed cannot
be adjusted so that the cutting
attachment stops, contact your
dealer/service workshop. Do not use
the machine until it has been
correctly adjusted or repaired.
This engine is designed and manufactured in order to
comply with EPA (Environmental Protection Agency)
Phase 3 regulations. The carburetor is designed to
permit only the adjustment of L and H screws in a
range of 1/4 round; the ±1/8 round the hall range
admissible for L and H screws is determined by the
manufacturer and you cannot modify it.
18
MAINTENANCE
FUEL FILTER
STARTER UNIT
WARNING: The coil spring is under
tension and could fly apart causing
serious injuries. Never try to
disassemble or modify it.
!
ENGINE
Clean the cylinder fins with compressed air or a brush
periodically. Dangerous overheating of engine may
occur due to impurities on the cylinder.
Check the fuel filter periodically. Replace it if
contaminated or damaged.
AIR FILTER
!
WARNING: Do not clean filter in
gasoline or other flammable solvent
to avoid creating a fire hazard or
producing harmful evaporative
emissions.
If a power drop is noticed, check the air filter.
Open the air filter cover (A) and check the air filter (B)
each day, change the filter if heavily clogged or
damaged.
Blow with compressed air, at a distance.
Reinstall the air filter into cover. Place the air filter
cover onto the brush cutter. Tighten the air filter cover
screw securely. A used air filter can never be
completely cleaned. It is advisable to replace your air
filter with a new one after six month of operation.
Make sure the cover and the support are clean before
fitting the new filter.
!
CAUTION: Never run the engine
without the air filter, serious damage
could result. Make sure the air filter
is correctly placed in the air filter
cover before reassembly. Always
replace damaged filters. Do not clean
a filter with a brush.
To keep the working temperature as low as possible
the machine is equipped with a cooling system.
SPARK PLUG
This engine uses a NGK BPMR7A with .02” (0.5 mm)
electrode gap. Use an exact replacement and replace
every six months or more frequently, if necessary.
!
WARNING: Never test the ignition
system with ignition wire connector
removed from spark plug or with
unseated spark plug, since
uncontained sparking may cause a
fire. A loose connection between
spark plug terminal and ignition wire
connector in the boot may create
arcing that could ignite combustible
fumes and cause a fire.
Use only resistor type spark plugs of the approved
range.
Factors such as:
- too much oil in fuel mix;
- dirty air filter;
- unfavorable running conditions (e.g. operating at part
load) may result in rapid deterioration of the spark
plug.
19
MAINTENANCE
MUFFLER
!
!
!
WARNING: This muffler is fitted with
a catalytic converter needed for the
engine to be in compliance with the
emissions requirements.
Never modify or remove the catalytic
converter: failure to do so is a
violation of law.
WARNING: Mufflers fitted with
catalytic converters get very hot
during use and remain so for some
time after stopping. This also applies
at idle speed. Contact can result in
burns to the skin. Remember the risk
of fire!
CONTINUAL MAINTENANCE
ADVISABLE
It is advisable to inspect the machine by a specialized
technician at an authorized service network at the end
of season, if used intensively, and every two years if
with normal use.
!
ATTENTION: All maintenance
operations not reported in this
manual must be carried out by an
authorized Service Center.
To ensure steady and regular
trencher/bed cutter operation,
remember that parts must only be
replaced with ORIGINAL SPARES.
WARNING: Do not operate your
machine if the muffler is damaged,
missing or modified.
An improperly maintained muffler will
increase the risk of fire and hearing
loss.
GEARBOX
Clean the Gearbox Output Shafts with compressed air
or a brush periodically. Overheating of engine may
occur due to impurities on the cylinder.
!
WARNING: The Gearbox (Fig. 5, (27))
can get hot during use and may
remain so for a while afterwards. You
could get burnt if you touch it.
DEFLECTORS
Inspect and clean both the Top and Bikini Deflectors in
regulator intervals. Build up of debris could hide
damage and/or necessary repair.
20
TROUBLESHOOTING
Using Troubleshooting Chart
!
WARNING: Always stop unit and disconnect spark plug before performing all of the
recommended remedies below except remedies that require operation of the unit.
When you have checked all the possible causes listed and you are still experiencing the problem or if you
are experiencing a problem that is not listed in this chart, see your Servicing Dealer.
PROBLEM
Engine will not start or will run only a
few seconds after starting.
Engine starts but will not accelerate
properly.
Engine starts but will not run properly
at high speed.
Engine does not reach full speed and
/ or emits excessive smoke
Engine starts, runs, and accelerates
but will not idle.
POSSIBLE CAUSE
1.
No spark
2.
Flooded engine
3.
Out of gas
1.
Carburetor requires “L” (Low jet)
adjustment.
2.
Clogged air filter
1.
Carburetor requires “H” (High
jet) adjustment.
2.
Clogged air filter
1.
Check oil fuel mixture.
2.
Clogged air filter
3.
Carburetor requires “H” (High jet)
adjustment.
Idle Screw adjustment
POSSIBLE SOLUTION
1. Check Spark. Remove spark
plug cover. Remove spark plug
from cylinder. Reattach the
spark plug wire and lay spark
plug on top of cylinder. Pull the
starter rope and watch for spark
at spark plug tip. If there is no
spark, repeat test with a new
spark plug (BPMR7A).
2. With the ignition switch off,
remove spark plug. Move choke
lever to Run position and pull
starter cord 15 to 20 times. This
will clear excess fuel from
engine. Clean and reinstall spark
plug. Pull starter three times with
choke lever at run. If engine
does not start, move choke lever
to choke and repeat normal
starting procedure. If engine still
fails to start, repeat procedure
with a new spark plug.
3. Remove Fuel Cap and refill tank.
1. Adjust with in allowable limits.
Outside of limits, contact a
Servicing Dealer for carburetor
adjustment.
2. Clean per Maintenance section
1. Adjust with in allowable limits.
Outside of limits, contact a
Servicing Dealer for carburetor
adjustment.
2. Clean per instructions in
Maintenance-Air Filter Section.
1. Use fresh fuel and the correct 2cycle oil mix.
2. Clean per instructions in
Maintenance-Air Filter Section.
3. Adjust with in allowable limits.
Outside of limits, contact a
Servicing Dealer for carburetor
adjustment.
Turn idle speed screw “T” clockwise
to increase idle speed. If cutting
attachment turns at idle, turn idle
21
TROUBLESHOOTING
speed screw “T” counterclockwise
to decrease speed; see OperationCarburetor Adjustment.
Cutting attachment running incorrectly
and with high vibration
Engine starts and runs, but cutting
attachment is not rotating
!
WARNING: Never touch the
blade while the engine is
running.
1.
2.
Gearbox damaged.
Gearbox assembled incorrectly
3.
Blade(s) assembled incorrectly
1.
Gearbox damaged.
2.
Gearbox assembled incorrectly
3.
Clutch drum damaged.
1. Replace if necessary – Contact
a Servicing Dealer
2. Reassemble the Gearbox to
Engine Pole with care
3. Reassembles the Blade(s) with
care
1. Replace if necessary – Contact
a Servicing Dealer
2. Reassemble the Gearbox to
Engine Pole with care
3. Replace if necessary – Contact
a Servicing Dealer
22
GENERAL
STORAGE
!
WARNING: Stop engine and allow to cool, and secure the unit before storing or transporting in a
vehicle. Store unit and fuel in an area where fuel vapors cannot reach sparks or open fl ames from
water heaters, electric motors or switches, furnaces, etc. Store unit with all guards in place. Position
so that any sharp object cannot accidentally cause injury to passersby. Store the unit out of reach of
children and other unauthorized persons.
1.
Drain and clean the fuel tank in a well ventilated area.
2.
Drain all fuel from tank into a container approved for gasoline. Run engine until it stops. This will remove all
fuel-oil mix which could become stale and leave varnish and gum in the fuel system.
3.
Clean all foreign material from the brush cutter. Keep away from corrosive agents such as garden chemicals
and de-icing salts.
4.
Abide by all Federal and local regulations for the safe storage and handling of gasoline. Excess fuel should be
used in other 2-cycle engine powered equipment.
!
CAUTION: It is important to prevent gum deposits from forming in essential fuel system parts such as
the carburetor, fuel fi lter, fuel hose, or fuel tank during storage. Alcohol blended fuels (called gasohol
or E10 or using ethanol, methanol) can attract moisture which leads to fuel mixture separation and
formation of acids during storage. Acidic gas can damage the engine.
TECHNICAL DATA
ENGINE:
Manufacturer: EFCO DS 3500
Displacement: 2.21 cu.in (36.3 cc)
Bore: 1.50 in (38 mm)
Stroke: 1.36 in (32 mm)
PERFORMANCE:
Idle Speed: 2,800 RPM
WOT (With Blade): 11,700 RPM
Power: 1.9 HP / 1.4 kW (8,500 RPM)
FUEL AND OIL SYSTEMS:
Carburetor: Multi Position Diaphragm Carburetor
Fuel Tank Capacity: 20.3 fl .oz. (600 ml)
Fuel Mix: See Operation-Fueling Section
IGNITION SYSTEM:
Spark Plug: NGK BPMR7A
Spark Plug Gap: 0.02 in. (0.5 mm)
TRENCHING ASSEMBLY
Gearbox: 10:1 ratio, V-output shaft; internal lubrication
Blades: 12 inch carbide tipped; knife edge
Deflector: Adjustable, 12 inch x 12 inch; rubber skirts
23
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