HSC DOSKO DOSKO6HP User manual

USER MANUAL
Serial Number Range:
Year Of Manufacture:
KEEP THIS BOOKLET FOR FUTURE REFERENCE
Nottingham: 0115 946 1988
London: 0208 830 3333
Nottingham: [email protected]o.uk
London: [e-mail]
www.hscgroupuk.co.uk
The Hire Supply Company (UK) Limited
6HP DOSKO MINI STUMP
GRINDER
Product Code:
DOSKO6HP

1
Owner's Manual
Instructions for Operation, Maintenance
Compact Stump and Root Grinder
200-6HC
Your Dosko grinder is intended for outdoor-use only and can be used to remove many tree stumps and
exposed root systems close to ground level. By moving the blade in sweeping movements laterally
over the top and front of the stump, you can gradually grind it away. Make sure you completely read
and understand this manual before using the grinder for the first time.
WARNING
READ and UNDERSTAND this manual completely before using the grinder! Failure to properly operate,
and maintain this grinder could result in serious injury or death to the operator or bystanders.
All machines have hazards associated with their operation. This stump grinder has certain special hazards,
which you must be aware of. As an operator or owner you have a duty to be aware of these hazards and know
preventive measures to take to avoid them. When reading this manual pay particular attention to avoiding these
hazards.
In particular, be aware of the following:
•Know location of buried electrical and other utility lines.
•Do not allow children or untrained adults to operate.
•Wear eye protection and other personal protection against flying rocks and debris.
•Check that cutter wheel teeth are secured, sharp and not missing.
•Do not operate if operator presence bar fails to stop engine upon release.
•Make sure no children or bystanders are within 75 feet (23 m) of stump grinding operation.
•Protect cars, windows and other objects within 75 feet (23 m) from flying debris.
•Be prepared for machine "kickback" when initially contacting the stump.
•Be aware of potential for carbon monoxide (CO) poisoning.
•Prevent fires/explosions from fueling.
•Do not attempt to perform adjustments, declog or clean unit while engine is running.
•Avoid burns from engine or hot exhaust.
•Avoid using in wet or icy conditions where falls may occur.
Details about these hazards are found throughout the manual and are summarized at the end of the manual under
"Important Safety Information."
STOP!
ADD ENGINE OIL:Your stump grinder comes fully assembled and requires only that you add engine oil to crankcase
and fuel to tank.
INSPECT COMPONENTS:Closely inspect to make sure no components are missing or damaged. See the "Receiving
Your Unit" section for instructions on whom to contact to report missing or damaged parts.
Any Questions, Comments, Problems, or Parts Orders
Call your dealer or DOSKO Customer Service 1-800-822-0295 or 1-763-428-2237
MODEL NUMBER: 2962090
SERIAL NUMBER: _____________
M2962090O

Hazard Signal Word Definitions
2

Table of Contents
3
Part I. Introduction
About Your Grinder ..............................................................................................................4
Safety Decal Locations............................................................................................................5
Safety Decals............................................................................................................................6
Receiving Your Unit................................................................................................................8
Machine Component Identification ......................................................................................9
Part II. Operation
Operation:
1. Pre-Start Check List & Procedures...............................................................................10
2. Starting the Grinder.......................................................................................................13
3. Stopping the Engine......................................................................................................14
4. Grinding the Stump.......................................................................................................15
5. Refueling.......................................................................................................................16
6. Storing the Machine......................................................................................................17
Part III. Maintenance and Repair
Maintenance (To be done by owner or Rental Dealer) ..........................................................20
1. Belt Tension Adjustment ............................................................................................ 22
2. Stop-Switch Adjustment............................................................................................. 23
3. Installing Teeth ........................................................................................................... 23
4. Schedule...................................................................................................................... 25
Specifications..........................................................................................................................26
Part IV: Important Safety Information
Summary of Important Safety Information....................................................................... 27
Special Safety Information on Static Electricity................................................................ 30
Parts Explosion........................................................................................................................ 31
Warranty.................................................................................................................................... 33
California Proposition 65 Information............................................................................ 34

About Your Grinder
4
Thank you for purchasing or renting your Dosko grinder!
Owner/Operator/Renter Training
Read and follow all instructions and safety precautions presented throughout this manual. A summary of
important safety information can be found at the end of the manual. Keep this manual for reference and
review. If the owner of this unit is different than the operator, give a copy of this manual to any
operator to read. Rental Companies
All persons to whom you rent/loan this grinder must have access to this manual and read it. Check the
tube on the side of the unit to make sure a manual is inside. Advise all persons who will operate the
machine to read it. You should also provide personal instruction on how to safely operate the grinder and
remain available to answer any questions a renter/borrower might have. If videos are available, have
renter watch training video. Engine Instructions
For detailed Engine operation and maintenance information, always refer to the engine Owner's Manual
furnished with the grinder.
Product Suitability
Before using, the user shall determine the suitability of this product for this intended use and assumes
liability therein.
Your Dosko grinder can be used to remove many tree stumps and exposed root systems close to ground
level. By moving the blade in sweeping movements laterally over the top and front of the stump, you can
gradually grind it away. Never use a stump grinder for anything but grinding wooden tree stumps. The
intended operating environment is -20°C to 40°C to 95% RH. This is representative of most outdoor
conditions. Make sure you completely read and understand this manual before using the grinder for the
first time. If you have any questions, contact your retail or rental dealer or Dosko Customer Service at 1-
800-822-0295 or 1-763-428-2237.
WARNING: Never attempt to cut on a slope exceeding 15.
Exercise caution when cutting stumps on an incline, as the machine may shift or slide unpredictably. Never
attempt to cut with the machine uphill or downhill from you as it may slide toward you or you may fall
toward the machine. Cut only on a slope from the side. Never place, use, or move the stump grinder on a
slope exceeding 15°.
˙
Dosko is constantly improving its products. The specifications outlined herein are subject to change
without prior notice or obligation. The purchaser and/or user shall assume liability for any modification
and/or alterations of this equipment from original design and manufacture. Any alterations shall void
warranty and CE Certification (where applicable).
Contact Dosko Customer Service at 1-800-822-0295 or 1-763-428-2237 for any questions about the
appropriate use of this grinder or about optional accessories.
Warranty Registration
Please fill out and submit the warranty registration card so that we have your contact information for any
future product literature or replacement parts you may need.

Safety Decal Locations
5
*Only used on units sold into the EU
Reference #
Part #
Description
1
786100
decal set
Control Panel
789666*
2
799546
California Proposition 65 Warning
3
786100
decal set
Poisonous Gas Hazard
4
Flying Debris Hazard (direction)
789538*
5
786100
decal set
Personal Injury / Fire, Explosion / Entanglement Hazards
6
Flying Debris Hazard (person)
7
Amputation and Entanglement Hazard
789537*
8
799952
Spark-Strike Warning
WARNING
ALWAYS make sure safety labels are in place and in good condition. If a safety label is
missing or not legible, order new labels.

Safety Decals
6
2
1
3
5
7
6
4
8

Safety Decals
7
To order replacement safety labels, call Dosko Customer Service at
1-800-822-0295 or 1-763-428-2237.
REF.
DESCRIPTION
A
Cutting hazard to
foot. Keep
distance.
B
Thrown object
hazard. Keep
distance.
C
Wear eye
protection while
operating.
D
Wear ear
protection while
operating.
E
Wear protective
footwear while
operating.
F
Wear gloves while
operating.
G
Hazards exist. Read
manual before operating.
H
Move control
forward to
disengage brake.
Move control
backward to
engage brake.
7
789537
A
4
789538
B
1
C
D
E
F
G
H
789666

Receiving Your Unit
8
1. Receiving Your Unit
For all Units
You should inspect the grinder immediately after you receive delivery.
See the "Machine Component Identification" section of this
manual for a diagram of the grinder and its components.
•If you have missing components, contact your rental company or Dosko
Customer Service at 1-800-822-0295 or 1-763-428-2237.
New Unit: Truck
Delivery
Depending on your unit and model, it may have been shipped on a
wooden skid, cardboard container or other appropriate method.
For any shipping damage, make sure the delivery driver acknowledges it
and a claim is filed with the freight delivery company.
Note: Shipping damage claims are not covered by Dosko
warranty. Please contact carrier!
If any assembly is required. Separate assembly instructions will be
included.
New Unit: From a
Dealer
Your unit should have been delivered completely assembled and ready to
run. Read the "Pre-Start Checklist & Procedures" section, and verify that
the unit has been properly "prepped" before initial use.
Factory Delivery
In these cases, your unit has been completely assembled, tested and pre-
run. It should be ready for usage. See "Pre-Start Checklist and
Procedures".

Machine Component Identification
9
Reference #
Description
1
Operator Presence Handle Bar
2
Throttle Control Lever
3
Handle Bar
4
Adjustable Brake Lever
5
Manual Storage
6
T-Handle Knob
7
Engine
8
Starter Grip
9
Tire and Hub
10
Engine On/Off Switch
11
Discharge Flap
12
Cutter Guard
13
Cutter Wheel Disc
14
Cutting Tooth
15
Front Handle
16
Belt Guard
17
Nameplate/Serial Number

Operation
10
1. Pre-start Check List & Procedures
CAUTION:
Add engine crankcase oil. A new engine is shipped without oil. You must add the correct
amount of oil to engine crankcase or engine will be damaged beyond repair.
Before starting the engine you will want to make sure you have completed the following:
1. Marking Underground Utilities
2. Checking Controls
3. Checking Cutting Teeth
4. Checking/Adding Oil
5. Filling Stump Grinder Gasoline Tank
6. Inspecting Fuel System for Leaks
7. Locking Handle Bar
8. Wearing Personal Protection
9. Trimming Stump with Saw
10. Clearing Area of People and Objects
11. Working During Daylight
Each of these procedures is discussed in detail below.
Marking
Underground
Utilities
Call 811 or your local utility company to request marking utilities 3
days before stump grinding. Trees can grow on top of and around
underground wiring that was installed many years before a tree was
planted.
Check controls.
Check that:
•All guards are in place and tight.
•Operator presence bar switch is free moving.
•Inspect tires and rims for looseness, damage, and tire inflation.
Check cutting teeth
Inspect cutting teeth for tightness and sharpness. Only use factory-approved
parts for repair.
Check/add oil
Check the oil level using the dipstick and add oil as needed.
Using a funnel, add oil up to the FULL mark on the dipstick with the
recommended oil type for your engine and expected ambient conditions.
(See engine Owner's Manual for oil type and capacity, and more detailed oil
check/fill instructions.)
WARNING: Burn hazard
Never open oil fill port while engine is running. Hot oil can spray
over face and body.
˙

Operation
11
Fill stump grinder
gasoline tank
Check the gasoline level in the engine's fuel tank. If needed, fill tank with
fresh unleaded gasoline from a portable container, after first reading the
warnings and instructions below.
- Do NOT fill the gas tank to the top. Gasoline may spill when operating
on a slope.
- Do NOT overfill the gasoline tank. Allow at least 1" of empty space
below the fill neck to allow for fuel expansion.
WARNING:Gasoline fire/explosion hazard
Gasoline is highly flammable and explosive. Heat, sparks, and
flames can ignite gasoline vapors, which can become widespread
during fueling. A flash fire ignition and/or explosion could result
and cause serious injury or death. The following conditions could
result in gasoline ignition/explosion:
•gas vapor collection inside enclosures
•static electric sparks
•sparks from electric wiring, batteries, or running engines
•sources of heat (such as a hot engine or exhaust)
•open flames, including pilot lights
Inspect Fuel
System / Check for
Leaks
Inspect fuel system & check for leaks BEFORE starting grinder.
WARNING: Fuel leak hazard
A leaking fuel line no matter how small can be the source of a fire or
explosion when starting or operating the engine.
•Inspect the entire fuel system. Look for: Signs of leaks or deterioration,
chafed or spongy fuel hose, loose connections, loose or missing fuel
hose clamps, damaged gasoline tank, or defective gasoline shut-off
valve.
If grinder is in an enclosed area and you smell gas, DO NOT start
engine! DO NOT light a match. DO NOT flip on an electrical switch.
Exit area immediately leaving doors open and call fire department.
Locking Handle
Bar
Handle is capable of folding when not in use.
To lock handle into place:
•While unfolding handle, hold right ring up.
•Once handle is unfolded, slide ring down over both handle and frame
tube.
•Unhook left ring from hook and slide down over both handle and
frame tube.
To fold handle:
•Lift left ring and place on hook.
•Lift right ring and fold handle.

Operation
12
Personal Protection
Use approved protective clothing and approved protective equipment
when using the machine.
1) Always wear ANSI-approved and OSHA-compliant (in the EU,
EN166 1F) safety glasses with side shields and a full-face shield.
2) The use of ear plugs or other hearing protection device is also
recommended for persons working within 15-20 feet (4.5–6 m) of the
running grinder for longer than a few minutes. Hearing can be damaged
from prolonged, close-range exposure to the type of noise produced by
this grinder.
3) Wear long pants to protect legs from sparks, hot engine and flying
debris.
4) Never wear jewelry or loose-fitting clothing when starting or
operating the grinder or any mechanical device. Loose or dangling
apparel, jewelry or hair can become entangled in moving parts.
Trim Stump with
Saw
Cut or trim the stump preferably to ground level using a power saw.
Clear Area
Dig away the earth and remove any stones near the tree stump or roots that
may interfere with your work.
Work During
Daylight Hours
Only use the machine in daylight or in well-lit conditions. Never operate
the grinder after dark. Never operate the grinder in icy conditions, when
there is severe weather, or lightning.
Locked Position
Unlocked Position
Left
Ring
Right
Ring
Hook
Frame
Tube
Handle
Tube

Operation
13
Safe Zone
Danger Zone
Operator
Position
2. Starting the Grinder
After you have completed the pre-start checklist and procedures, you are ready to start the
grinder.
The following directions detail how to start the engine of your grinder.
WARNING:
Never attempt to use the grinder without proper protective equipment,
particularly eye protection and a full-face shield.
WARNING:
If you have an implanted medical device, consult a physician before using
this device.
To start the grinder:
Note: For additional engine starting instructions see your Honda engine manual.
1) Lock handle in the upright position.
2) Place stump grinder into position with cutting wheel near the front-top edge of the stump.
3) Use brake lever on handle to lock the wheel brake.
Note: For tighter brake adjustment, turn knob on top of brake lever. (See Maintenance &
Repair sections for instructions)
WARNING:
Stay in the OPERATOR POSITION (behind the machine) while
actuating controls. Never leave grinder unattended.
4) For cold engine, move choke lever
to the CLOSED position. To
restart a warm engine, leave choke
lever in OPEN position.
5) Turn engine switch to the ON
position.
6) Grip operator presence bar and
handle bar together in left hand.
WARNING:
A rotating cutting wheel is very dangerous. Stay at the controls and keep
others away until you are sure the blade has come to a complete stop.
7) Pull the starter grip lightly until you feel resistance, then pull briskly. Return the starter grip
gently. If the choke lever was moved to the CLOSED position to start the engine, gradually
move it to the OPEN position as the engine warms up.
8) If engine does not start, repeat steps 5-7.
9) Press down on handle bar to lift cutter wheel off the ground.
10)Grip throttle control lever and handle bar together in right hand. Centrifugal clutch will
engage and cutter wheel will begin to rotate.

Operation
14
3. Stopping the Engine
Stop the engine using the following steps:
1. While holding blade off ground, release the
operator presence bar. The engine will
stop. Wait until the blade completely stops.
Lower the blade so it is resting against the
ground.
2. Make sure brake is set before leaving the
controls, particularly if you are on an
incline.
3. Turn engine switch to OFF position.
4. Allow the engine to cool for at least 5
minutes before releasing brake and moving
to storage or transporting. A hot engine
can be a fire hazard.
Operator presence
handle bar
Adjustable brake lever
Cutting wheel
Adjustable Brake lever
Throttle control lever
Operator presence
handle bar
Handle bar

Operation
15
4. Grinding the Stump
WARNING: Flying Debris Hazard
Stones, chips, and debris can cause serious injury or property damage.
Debris can fly 75 ft (23 m)in any direction out of the chute. They can
bounce off any fixed objects as well and hit operator, bystanders or
breakable objects.
1. Set/engage the brake.
2. Pivot the grinder toward the side of the stump, with a fairly light touch feed straight into the
stump. As soon as you feed in, start to swing to the side until you feel the wheel drop off the
edge of the stump. Change direction and swing back the other way until you feel it reach the
other edge of the stump. As you swing to the side listen to the engine. Provide enough feed to
give it a moderate load. If you hear any belt or clutch squealing you are pushing too hard. If
you can’t swing it to the side, raise the grinder up.
You can cut roots off by plunging straight through them.
WARNING: Rotating cutter wheel.
Keep hands and feet away. Contact with wheel rotating teeth will cause
serious personal injury.
Chip Build-up
3. When grinding larger stumps, chips may begin to build up under the wheels.
4. Release brake and pull machine towards you so that the "chip pile" is directly under the
cutting wheel.
5. Drop cutter wheel down on "chip pile", material will be discharged from machine area.
WARNING: Flying Debris Hazard
Stones, chips, and debris can cause serious injury or property damage.
Debris can fly 75 ft (23 m) in any direction out of the chute and bounce off
objects and hit operator, bystanders or breakable objects.
Chip pile
Cutter wheel
Direction of
grinding

Operation
16
6. On these larger stumps, DO NOT allow grinder wheels to drop into stump hole. If a hole is in
the way of your progress, fill it with chips or change position.
WARNING:
Stop engine and set brake before leaving operator's position. KEEP BRAKE
ENGAGED except when changing locations.
7. When finished, stop the machine.
8. Pull machine away from stump, and rake chips away from stump.
5. Refueling
1) Before removing gas cap, turn engine off and allow to cool for at least two minutes.
Note: A running or hot engine can ignite fuel.
2) Remove grinder gasoline cap.
3) Add gasoline through the fill opening:
-Use only an UL-approved portable gasoline container to transfer the gasoline to the grinder's
tank.
-Be aware of safety warning and instructions below for avoiding static electric caused fires.
-Do not overfill.
WARNING:
Static electric spark hazard
A static electric spark can explosively ignite gasoline vapor,
resulting in a flash fire that could cause serious injury or
death. See "Special Safety Information on Static Electricity" at
end of this manual.
4) Clean up gasoline spills /splashes immediately.
•If possible, move the grinder away from spilled gasoline
on the ground.
•Wipe up spilled gasoline, and wait 5 minutes for excess
Wheel
Chip pile/debris
Hole
NOT CORRECT
CORRECT

Operation
17
gasoline to evaporate before starting engine.
•Gasoline soaked rags are flammable and should be disposed of properly.
•If gasoline is spilled on your skin or clothes, change clothes and wash skin immediately.
5) Replace gasoline cap securely before starting engine.
6) Store extra gasoline in a cool, dry place in an UL-approved, tightly sealed container.
7) Filling towable units or portable containers at service stations:
Even if you have a towable unit, avoid static electric sparking while filling the
gasoline tank:
•Never fill the grinder's gas tank directly from the fuel pump. The grinder's
tank is not grounded and high velocity flow from the pump can cause static
electricity build-up. Use an approved portable container to transfer gas to
the grinder's tank.
•Use a portable container made of metal or conductive plastic. This is
preferred because it dissipates static charge to ground more readily.
•Never fill a portable gas container while it is sitting inside a vehicle, trailer,
trunk, or pick-up truck bed. ALWAYS place container on the ground to be
filled.
•Keep nozzle in contact with container while filling. Do not use a nozzle lock-
open device.
6. Storing the Machine
When you are finished using the grinder and it has cooled, you must:
•Cool engine before storage.
•Clean the grinder.
•Inspect for worn or damaged parts.
•Choose covered storage location.
•Prevent accidental starting.
•Plan on exercising the engine at least monthly unless the grinder is prepared for long-
term storage.
Detailed instructions are provided below.
Cool engine
Let engine cool for at least five minutes before storing. A hot engine can
be a fire hazard.
Clean grinder
Clean all grease, dirt, mud and other foreign matter from the machine.
Touch up paint damage to prevent rust.

Operation
18
Inspect grinder
Inspect the machine for worn or damaged parts and tighten any nuts or
screws that may have become loose. Pay particular attention to the
cutting teeth.
Choose a storage
location
Store the grinder in a location that is:
- Clean and dry.
- Away from sources of heat, open flames, sparks, or pilot lights, even if
the grinder's gas tank is empty. Residual gasoline could ignite.
- Away from extreme high or low temperatures.
- Cover it for extra protection.
WARNING: If stump grinder is left in direct sunlight and
exposed to extreme temperatures fuel hoses can degrade rapidly.
Remove spark plug
Remove spark plug, in order to ensure the grinder cannot be started in a
storage location or by untrained persons or children.
Start grinder every
4 weeks
The grinder should be started regularly. At least every four weeks, start
the engine and let it run for 10 to 15 minutes.
Monthly exercising of the grinder will dry out any moisture that has
accumulated, lubricate cylinders, and clean out old gas in the carburetor.
Moisture, old gas, and dry mechanical parts cause deterioration in stored
engines.

Operation
19
Prepare engine for
long term
(seasonal) storage if
needed
If you will not be able to start the grinder regularly, you must prepare
the engine for long term storage to prevent gum deposits from forming
and causing malfunction of the engine.
Prepare engine for long term storage by:
oRemoving all gasoline from the tank and carburetor
OR
oAdding fuel stabilizer to the gasoline (following manufacturer's
instructions)
Fuel stabilizer steps:
1. Ensure gas tank is full.
2. Add fuel stabilizer to fuel tank.
3. Run engine at least 10 minutes after adding stabilizer to
allow it to enter the fuel system.
4. Shut off engine
5. Disconnect spark plug wire and remove spark plug
6. Add one teaspoon oil through spark plug hole
7. Place rag over spark plug hole and turn starter (or pull the
recoil) a few times to lubricate the combustion chamber.
8. Replace spark plug, but do not reconnect the spark plug wire.
WARNING:Gasoline fire/explosion hazard
Gasoline is highly flammable and explosive. Drain the fuel into an
approved container OUTDOORS and far away from open flame.
NEVER store an engine with fuel in the tank indoors or in poorly
ventilated spaces where fuel vapor can come in contact with
•static electric sparks
•sparks from electric wiring, batteries, or running engines
•sources of heat (such as a hot engine or exhaust)
•open flames, including pilot lights