B.W. Machinery Greatbull GBK65 Series User manual

Greatbull Chipper
User’s Manual
GBK65 Series
Please read through this owner’s manual carefully before using the product, to insure
the safety of yourself and others.
*Due to continuing improvements, actual product may differ slightly from the product described herein

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Index
1. Introduction........................................................................................ 2
2. Safey and Security Measures....................................................... 2
3. Warning Signs.................................................................................... 8
4. Machine Symbols.............................................................................. 9
5. Machine Description......................................................................10
6. Operating Instructions.................................................................12
7. Using the Machine..........................................................................20
8. Maintenance and Service............................................................ 21
9. Troubleshooting.............................................................................. 27
10. Transportation.............................................................................. 28
11. Storage.............................................................................................28
12. Recycling and Machine Disposal............................................29
13. Warranty Conditions...................................................................29
14. Spare Parts Diagram...................................................................30
15. Spare Parts List.............................................................................31

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1. INTRODUCTION
Warning! Read all safety warnings and all instructions. Failure to
observe all warnings and instructions below can result in fire and/or serious
injury. Before using this machine, carefully read the information in this
manual on correct set up and safety techniques.
The chipper is only designed to shred pieces of wood. It is prohibited to
shred any other material (for example metal, stones, plastics and any other
materials). If you want to shred roots, remove the sand, mud or other
residues before shredding. Any other use of the shredder not described
here, annuls the warranty responsibility of the manufacturer.
Save all instructions for future reference. If sold in the future,
remember to give this manual to the new owner.
Remember that the machine operator is responsible for the damages and
accidents caused to other people or things. The manufacturer will not be
liable in any way for damages caused by improper or incorrect use of this
machine.
2. SAFETY AND SECURITY MEASURES
To avoid mishandling this machine please read all instructions in this
manual before using for the first time. All information included in this
manual is important for your personal safety and that of other people,
animals and things surrounding you. If you have any questions regarding
the information contained in this manual ask a professional or go to the
point of sale where you purchased this machine to resolve it.
The following list of hazards and precautions include the likely situations
that may occur during the use of this machine. If you encounter a situation
not described in this manual use common sense to use the machine in the
most secure way possible, or if you see danger, do not use the machine.

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2.1. USERS
This machine has been designed to be manipulated by older users who
have read and understand these instructions. This machine must not be
used by children, or lack of experience or knowledge.
Warning! Do not allow children to use this machine.
Warning! Do not allow people who do not understand these instructions
to use this machine. Before using this machine, familiarize yourself with it
ensuring that you perfectly know where the controls and safety devices are,
and the manner in which it must be used. If you are an inexperienced user
we recommend you practice doing a simple job and if possible, in the
company of an experienced person. The cutting tool of this machine is very
sharp. It is dangerous to use this machine improperly.
Warning! Only lend this machine to persons who are familiar with this
type of machine and know how to use it. Always lend the machine along
with the user instruction manual so the new user can carefully read it and
understand it. This machine is dangerous in the hands of untrained users.
Place the machine on a flat surface and make sure it’s stable before starting
it.
Create a work area with a width of 3 meters and a length of 10 meters in
the direction where the residues are expelled. During the shredding process,
the users must ensure that nobody is injured with the material expelled
from the machine. Mark the working area with for example red and white
beacons.
Always place the switch in the off position when:
● The machine is not being watched over.
● Maintenance work is being carried out.
● The entry and exit tubes have been removed.
Carry out periodic maintenance inspections (see “Maintenance and service”
section).

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2.2. PERSONAL SAFETY
Stay alert, watch what you are doing and use common sense when
operating this machine.
Do not use this machine when you are tired or under the influence of drugs,
alcohol or medications. A moment of inattention while operating this
machine can cause serious personal harm.
Remove all keys or hand tools from the machine and the work area before
starting the machine. A wrench or tool left near the machine may be
touched by a part of the machine in motion and project itself causing
personal injury.
Keep both feet firmly in place on the ground and maintain balance at all
times.
When using this machine, wear the following protective equipment: Eye and
hearing protection and safety gloves.
The noise caused by this machine can cause hearing damage. Use
auditory protection.
Dress properly. Do not wear loose clothing or jewellery.
2.3. SAFETY IN THE WORK AREA
Do not operate this machine in explosive atmosphere as well as in
the presence of flammable liquids, gases and dust.
Never start the machine in enclosed areas such as rooms or
garages. This machine emits dangerous gases through the
exhaust pipe that will accumulate in the area causing the air to be
toxic and harmful to the health of people, animals and plants that
are inside the area. Do not start the machine in a room or enclosure. The
exhaust fumes and fuel fumes contain carbon monoxide and harmful

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chemicals. In case of a concentration of gases produced by poor ventilation,
remove all the impedes the flow of clean air from the work area to improve
ventilation and do not return to work in the area unless you have correctly
ventilated the area and are certain that ventilation is sufficient as to not
happen again this concentration.
The area within a radius of 10 meters around the machine
should be considered risk area in which no one must enter while
the machine is running (security area). When necessary, use
rope and warning signs to mark the security area.
Maintain children and curious persons away from the work area while
operating this machine. Distractions can cause a loss of control. Make sure
the children, people or animals do not come into your work area.
When the work must be performed simultaneously by two or more persons,
always check the presence and location of others in order to maintain a
sufficient distance between each person to ensure safety.
Do not use this machine at night, with fog or low visibility which will not
allow you to see the working area clearly.
Keep the working area clean and work with good lighting. Only use this
machine with daylight or with good artificial lighting. Cluttered and dark
areas cause accidents. Inspect and remove any objects that can cause
damage to you or the machine.
2.4. SAFETY IN THE USE OF FUELS
IMPORTANT: The fuel used for this machine is highly flammable.
If the fuel or the machine ignites, smother the fire with a dry
powder fire extinguisher.
Petrol and oil are hazardous; avoid contact of gasoline or oil with the skin
and eyes. Do not inhale or swallow them. Immediately see your doctor if
you ingest fuel or oil. If you accidentally come into contact with fuel or oil
clean with soap and water as soon as possible, if you then continue to feel
irritated or unwell immediately consult a doctor.
Do not refuel in enclosed or poorly ventilated areas or near flames.
Fumes from the fuel and oil contain hazardous chemicals. In the
case of a concentration of gases produced by insufficient
ventilation, remove all that impedes the flow of clean air from the area in

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order to improve the flow of clean air from the area in order to improve
ventilation. Do not return to the area unless you have properly ventilated
the area and are certain that ventilation is sufficient so this does not happen
again.
Petrol and oil are extremely flammable and explosive under
certain conditions. Do not smoke in the area. Keep flames,
sparks or heat sources away from the machine.
Do not smoke while transporting fuel, when you fill out the deposit or when
you are working with the machine.
Do not refuel in locations where there is the presence of open flames,
sparks or heat sources. Fill the tank always in well-ventilated areas and with
the motor stopped. Do not overflow fuel when filling the fuel tank. Make
sure to correctly and tightly close the cap on the fuel after refilling. In the
event of a fuel leakage, be sure to clean these leaks completely before
starting, move the machine away from the spillage area and avoid any
source of ignition until all vapours are gone. Add fuel before starting the
machine.
Never remove the cap of the fuel tank while the engine is running or when
the machine is hot. Make sure the cap of the fuel is tightly and correctly
closed while you are using the machine.
Do not use fuel that has been stored for longer than 2 months.
2.5 CARE AND USE OF THIS MACHINE
The chipper is only designed to shred pieces of woods. It is prohibited
to shred any other materials ( for example metal, stones, plastics and
any other materials). If you want to shred roots, remove the sand, mud or
other residues before shredding. Any other use of the shredder not
described here, annuls the warranty responsibility of the manufacturer.
Check that all the safety devices are installed and in good condition.
Remember that the machine operator is responsible for the dangers and
accidents caused to other people or things. The manufacturer will not be in
any way liable for damages caused by improper or incorrect use of this
machine.

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The cutting tool is very sharp. Not following the instructions may cause
severe damage.
Keep this machine maintained and in proper condition. Check that the
moving parts are not misaligned or locked, that there are no broken parts or
other conditions that may affect the operation of this machine. Whenever
this machine is damaged, repair it before use. Many accidents are caused
by poorly maintained machines.
Check:
- The machine completely and look for loose and damage parts (screws,
nuts and etc).
- Engine oil level.
- Damaged and /or defective welded parts.
Make sure that the machine undergoes adequate maintenance controls. All
damage caused by the use of defective, worn out or non original parts,
annuls the warranty responsibility of the manufacturer.
Keep your face and body as far away from the machine as possible. Whilst
introducing the wood into the machine for shredding, maintain both feet at
the same level as those of the wheels.
Turn off the machine, disconnect the spark plug and make sure that the
cutting tool has stopped before making any adjustments, filling with fuel,
changing accessories, cleaning transportation and storage of this machine.
Such preventive safety measures reduce the risk of accidental starting of
this machine.
Never tilt the machine when the engine is running.
Replace the caution signs if damaged or if not legible.
Do not tilt the machine with the engine running.
Reduce the engine speed when shutting down the engine, and if the engine
has a petrol closing valve, then close this valve when the engine is not
running.

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2.6 SERVICE
Please periodically check your machine by a qualified repair service agent
using only original replacement parts. This will ensure that the safety of this
machine is maintained.
3. WARNING SIGNS
Warning labels indicate required information for the use of the machine.
Warning: Danger!
Carefully read this manual before starting or using the machine.
You must wear adequate protection for the ears and eyes.
Use safety gloves and slip-resistant safety boots.
Do not get in front of this machine when it is running, danger of
injury.
Keep people away from the work area.
Blades and rotating parts in operation. Keep hands and feet away.
Danger of injury.
Do not insert hands or any other body part in the feeding hopper
oor in the ejection mouth piece.
Attention! Do not touch! Hot surface.
Danger: Lethal gases! Do not use this machine in enclosed or
_poorly ventilated areas.
Danger! Flammable fuel. Risk of fire or explosion.

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Do not smoke or get flames near the fuel or machine.
Check that there are no fuel leakages.
Warning ! Before carrying out maintenance or repair work on the
machine, turn it off and disconnect the spark plug.
Dispose of your appliance organically. So do not throw in trash
containers.
Comply with the CE directives (EU standards).
4. MACHINE SYMBOLS
In order to guarantee safe and proper use and maintenance of the machine,
the following symbols appear on the machine.
Fuel tank
Choke open
Open fuel lever
Positions of the accelerator:
Tortoise = Minimum.
Hare = Maximum.
ON (Machine is ready to function).
OFF (Machine cannot function).
HOT Warning: Hot surface! Risk of burns.

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Oil tank
When the engine is running, do not open
the guard. Stop the engine when
changing the cutting blade.
Do not put your hands into the machine.
5.MACHINE DESCRIPTION
5.1.CONDITIONS OF USE
The chipper is only designed to shred pieces of wood. It is prohibited to
shred any other materials (for example metal, stones, plastics and any other
materials). If you want to shred roots, remove the sand, mud or other
residues before shredding. Any other use of the shredder not described
here, annuls the warranty responsibility of the manufacturer. Do not use
this machine for any other purpose not intended. The use of this machine
for other than the designated operations may result in dangerous situations.
Use this machine outdoors, in dry environments and temperatures between
5℃to 45℃.
Remember that the machine operator is responsible for the dangers and
accidents caused to other people or things. The manufacturer shall not be in
any case responsible for damages caused by improper or incorrect use of
this machine.

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5.2. DETAILED DESCRIPTION OF THIS PRODUCT
1. Fuel Tank
2. Emergency Stop Switch
3. Flap
4. Feeding Chute
5. Wheels
6. Axle
7. Supporting Stand
8. Tow Bar
9. Drive Belt Component
10. Engine
11. Discharge Chute
12. Discharge Chute Adjusting Plate
Images and drawings in this manual are approximate and may not correspond with the
actual product.
5.3. TECHNICAL FEATURES
Brand
Greatbull
Greatbull
Model
GBK65
GBK65H
Engine
Briggs & Stratton 6.5HP
Honda GX200
Displacement
205cc
196cc
Fuel Type
Unleaded Petrol
Unleaded Petrol
Fuel Volume
3.8L
3.1L
Oil Type
SAE30
10W30
Oil Volume
0.6L
0.6L
Max. Cutting Capacity
76mm (3”)
76mm (3”)
Max. Engine Speed
3600rpm
3600rpm
Max. Blade Speed
2400rpm
2400rpm
Net weight
74kgs
74kgs
The above technical characteristics can be modified without prior notice.

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6. OPERATING INSTRUCTIONS
6.1. ASSEMBLY
Step 1. - Wheels and wheel axle.
Step 2. - Support stand and tow bar.
Pic. 1
Pic. 2
Pic. 3
Pic. 4
Pic. 5

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Step 3. - Feeding chute and discharge chute.
Step 4. - Connect the wires.
Pic. 6
Pic. 7
Pic. 8
Pic. 9

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6.2. FUEL AND OIL
IMPORTANT: The fuel used for this machine is highly flammable. I the fuel
or the machine ignites, put out the fire with a dry power extinguisher.
Petrol and oil are extremely flammable and explosive under certain
conditions. Do not smoke near the machine. Keep flames, sparks or heat
source away from the machine.
Use unleaded petrol.
Do not use fuel that has been stored for longer than 2 months. A fuel stored
for too long will cause the starting of the machine to be more difficult and
result in unsatisfactory engine performance. If the fuel has been in the
machine’s tank for longer than two months, empty the tank and replace it
with fresh fuel.
6.2.1. FILLING THE FUEL TANK
1. Choose a suitable area to perform this operation.
2. Remove the fuel thank cap and fill with fuel.
3. Tightly close the fuel tank cap and remove all any spilled fuel with a dry
cloth.
WARNING: Stop the engine before refuelling.
Do not start the machine in an enclosed room or space. The exhaust gases
and fumes from the fuel and oil contain carbon monoxide and harmful
chemicals.
In case of a large amount of gases produced by poor ventilation, stop the
engine safely. Do not return to the working in the area unless you have
properly ventilated the area and are certain that ventilation is sufficient so
that this does not happen again.
Do not refuel in locations where there is the presence of open flames,
sparks or heat sources. Always fill the tank in well-ventilated areas and with
the motor stopped. Don’t overfill the fuel tank. In the event of a fuel
leakage be sure to remove these leaks completely before starting, move the
machine away from the area of spillage and avoid any source of ignition
until all vapours are gone.

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Keep yourself at least 3 meters from the refuelling area before starting the
machine.
Add fuel before starting the machine. Never remove the fuel tank cap while
the engine is running or when the machine is hot.
Do not use fuels such as ethanol or methanol.These fuels will damage the
engine of the machine.
6.2.2. ENGINE OIL
For transportation reasons, your machine’s engine comes from the factory
without any oil in it. Before starting the engine for the first time you must
put oil the engine.
This engine uses quality 4-stroke SAE30/10W30 oil, depending on the model.
Filling the oil sump:
- Place the machine on a flat, horizontal and uncluttered surface.
- Unscrew the oil filler cap.
- Add 0.6L of oil.
- Wait 1 minute for the oil to completely go down to the crankcase.
- Clean the dipstick from the oil with a cloth.
- Insert the rod and screw on the oil cap.
- Unscrew the plug again and check the mark left by oil on the dipstick. The
mark left by the oil must be between the minimum and maximum marks.
- If the mark is below the minimum, add a little bit more oil and recheck.
Pic. 10

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- If the mark is above the maximum, you will have to remove oil from the
crankcase. To do this, tilt the machine and let out a small amount of oil (put
a container at the end of the tube to prevent oil spilling on the machine or
the ground).
6.3. STARTING THE MACHINE
6.3.1. CHECKPOINTS BEFORE STARTING
The machine must be operated as instructed below:
Keep hands, other extremities and clothes clear of the feeding chute, clear
of the discharge chute and clear of all rotating elements.
Maintain a good balance on both feet. Do not lean on the machine.
Maintain yourself well clear of the discharge area whilst the machine is
working.
If the blades hit a foreign object (any other objects different to wood) or if
the machine starts to make strange noises and/or it vibrates in an abnormal
way, stop the engine so that the blades stop turning. Take the machine to
your nearest service agent for repair.
If the machine gets stuck, you must stop it and wait for the blades to stop
turning.
The use of working gloves, ear protections and
working glasses is mandatory.
The machine is designed for outdoor use only. Avoid using the machine in
outdoor areas with a high probability of exhaust fumes.
The machine must be used by only one person at a time.
Never insert your hands into the feeding chute until the machine has been
stopped and the blades have stopped rotating.
Pic. 11

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The pieces of wood that might have got stuck transversally must only be
removed when the machine has been stopped completely and the blades
have stopped rotating.
Transportation of the machine should be carried out by two persons to
avoid possible injuries.
Two blades opposite on a rotor and another counter blade on the chassis.
6.3.2. STARTING THE ENGINE
Before starting engine make sure to check the engine oil and fuel tank.
1. Turn the fuel lever to the ‘ON’ position (Pic. 12) (12.1).
2. Set the choke lever to the ‘ON’ position (Pic. 13) (13.1).
Pic. 12
12.1
Pic. 13
13.1

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3. Turn the engine ‘ON/OFF’ switch to the ‘ON’ position (Pic. 14) (14.1).
4. Hold down the engine firmly with one hand on the frame. With the other
hand grip the recoil starter cord handle and pull slowly until resistance is felt
indicating that the recoil starter is engaged. When resistance is felt pull the
cord sharply (Pic. 15). Continue this procedure until the engine starts.
5. When the engine has been successfully started and is running smoothly
return the choke lever to the ‘OFF’ position (Pic. 16) (16.1).
Pic. 14
14.1
Pic. 15
Pic. 16
16.1

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6. When the engine is running, the speed can be adjusted by moving the
throttle control lever (Pic. 17) (17.1) to the high (indicated by a hare),
medium or low position (indicated by a tortoise).
6.3.3. STOPPING THE ENGINE
Note: If the machine starts to make an unusual noise, stop the machine
immediately, allow the engine to cool and inspect thoroughly.
1. To stop the engine, turn the engine ‘ON/OFF’ switch to the ‘OFF’ position,
as in Pic. 18 (18.1).
2. When the engine has stopped completely, turn the fuel lever to the ‘OFF’
position as well, as shown in Pic. 19 (19.1).
17.1
18.1
19.1
Pic. 18
Pic. 19
Pic. 17