DOSKO 2961040 Owner's Manual

Self-propelled stump and root grinder
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Self-Propelled Stump and Root Grinder
2961040 (691SP-20HE) & 2961050 (691SP-25KE)
Your Dosko grinder is intended for outdoor-use only and can be used to remove tree stumps and
exposed root systems close to ground level. By moving the wheel 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.
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 of stump grinding operation.
Protect cars, windows and other objects within 75 feet 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."
ADD ENGINE OIL, FUEL & BATTERY: Your stump grinder comes fully assembled and requires only that you add
engine oil to crankcase, fuel to tank, and a battery.
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
Owner's Manual
Instructions for Operation, Maintenance
WARNING
M2961040H.1
MODEL NUMBER: 2961040, 2961050
SERIAL NUMBER: _____________
STOP!
1

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Summary of Contents for DOSKO 2961040

  • Page 1 Self-Propelled Stump and Root Grinder 2961040 (691SP-20HE) & 2961050 (691SP-25KE) Your Dosko grinder is intended for outdoor-use only and can be used to remove tree stumps and exposed root systems close to ground level. By moving the wheel in sweeping movements laterally over the top and front of the stump, you can gradually grind it away.
  • Page 2 Hazard Signal Word Definitions...
  • Page 3: Table Of Contents

    Table of Contents Part I. Introduction About Your Grinder ......................4 Safety Decal Locations ......................5 Safety Decals ..........................6 Transporting & Receiving: 1. Receiving Your Unit ...................... 7 Machine Component Identification ..................8 Part II. Operation Operation: 1. Pre-Start Check List & Procedures ................9 2.
  • Page 4: About Your Grinder

    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 wheel in sweeping movements laterally over the top and front of the stump, you can gradually grind it away.
  • Page 5: Safety Decal Locations

    Amputation and Entanglement Hazard decal kit California Proposition 65 Warning Poisonous Gas Hazard 784291 Flying Debris Hazard (direction) 785625 2961040 Control Panel 784661 2961050 786635 Burn Hazard WARNING ALWAYS make sure safety labels are in place and in good condition. If a safety label is...
  • Page 6: Safety Decals

    Safety Decals To order replacement safety labels, call Dosko Customer Service at 1-800-822-0295. All grinder units can be transported via trailers or with the purchase of an optional towing kit package can be towed behind the vehicle.
  • Page 7: Transporting & Receiving

     If you have missing components, contact your rental company or Dosko Customer Service at 1-800-822-0295. Depending on your unit and model, it may have been shipped on a wooden skid, New Unit: Truck cardboard container or other appropriate method.
  • Page 8: Machine Component Identification

    Machine Component Identification Reference # Description Control Panel Pin Adjustment Handle Bar Tire and Hub Discharge Flap Belt Guard Tooth Pocket Cutting Tooth Cutter Wheel Disc Cutter Guard Gasoline Tank Engine Adjustable Brake Lever Handle Bar Operator Presence Handle Bar Direction Control Lever...
  • Page 9: Part Ii. Operation

    Operation 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: Marking Underground Utilities Checking Controls Checking/Adding Oil...
  • Page 10 Operation (cont’d) Fill Stump Grinder Check the gasoline level in the grinder's gas tank. If needed, fill tank with Gasoline Tank 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.
  • Page 11 Operation (cont’d) 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 Cut or trim the stump preferably to ground level using a power saw.
  • Page 12: Starting The Grinder

    Operation (cont’d) 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.
  • Page 13: Stopping Engine

    Operation (cont’d) Operator presence bar Handle bar Brake lever Ignition key switch Engine on/off switch Throttle Choke lever Handle bar adjustment Cutting wheel 3. Stopping the Engine Operator Stop the engine using the following steps: Direction presence bar control lever 1.
  • Page 14: Moving The Grinder

    Operation (cont’d) 4. Moving the Grinder Move the grinder using the following steps: (Refer to illustration on previous page) 1. Start engine. See "Starting the Grinder" on page 12 & 13. 2. Release Brake Lever. 3. Pull down on Handle, raising Cutting Wheel off the ground. 4.
  • Page 15 Operation (cont’d) Chip Build-up 12. When grinding larger stumps, chips may begin to build up under the wheels.  Release brake and pull machine towards you so that the "chip pile" is directly under the cutting wheel.  Drop cutter wheel down on "chip pile", material will be discharged from machine area. Cutter wheel Direction of grinding...
  • Page 16: Refueling

    Operation (cont’d) 6. 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.
  • Page 17: Storing The Grinder

    Operation (cont’d) 7. Storing the Grinder When you are finished using the grinder and it has cooled, you must: o Cool engine before storage. o Clean the grinder. o Inspect for worn or damaged parts. o Choose covered storage location. o Prevent accidental starting.
  • Page 18 Operation (cont’d) Start grinder every The grinder should be started regularly. At least every four weeks, start 4 weeks 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.
  • Page 19: Maintenance (To Be Done By Owner Or Rental Dealer)

    Repair. Major service, including the installation or replacement of parts, should be performed only by a qualified electrical service technician. Obtain factory approved parts from Dosko Service at 1-800-822-0295.  Replacement parts. If a part needs replacement, only use factory approved repair parts.
  • Page 20 Maintenance & Repair (cont’d) Cutter shaft bearings should be greased. Lubricate The cutter shaft bearing is greased by pumping grease into zerks located on the housing of the bearing. Cutting Grease zerks wheel Bearing Grease Specification Soap Type Lithium Complex NLGI Grade Dropping Point 230°C (446°F)
  • Page 21: Belt Tension Adjustment

    Adjustment is made by moving drive belt idler up or down. CAUTION: Over tightening this belt will damage the hydrostatic pulley. Note: New belts require a "break-in" period of approximately 10 hours. Readjustment may be necessary after "break-in." Note: Use only factory recommended belts. Contact your Dosko dealer.
  • Page 22: Hydrostatic Drive

    Maintenance & Repair (cont’d) 2. Hydrostatic Drive Neutral Adjustment The drive itself contains no adjustments. T-handle The ground control lever, when in Transmission automatic neutral position, should not allow any forward or rearward creeping Quick of the grinder (providing the grinder is disconnect on level ground –...
  • Page 23: Stop-Switch Adjustment

    Maintenance & Repair (cont’d) 4. Stop-Switch Adjustment CAUTION: Never attempt to alter, modify or override this switch. If Stop-switch needs to be replaced or adjusted follow the below directions. 1. Loosen Hex Nut. 2. Turn the Linkage Bolt clockwise to lower or counter-clockwise to raise the point of interaction with Stop Switch.
  • Page 24 When you dull or damage a cutting edge, loosen the top nut, tap the tooth down, rotate the tooth a third of a turn and tighten back up. Dosko cutting teeth are tipped with heavy-duty carbide. Carbide retains its Sharpening Teeth sharpness longer;...
  • Page 25: Schedule

    If a part needs replacement, only use parts that meet the manufacturer's specifications. Replacement parts that do not meet specifications may result in a safety hazard or poor operation of the grinder. Contact Dosko Customer Service at 1-800-822-0295 for any questions, problems, or parts orders.
  • Page 26: Specifications

    Specifications 2961040 2961050 ENGINE OPTIONS Make Honda Kohler Model GX630RTXF2 CH730-0002 CC Rating 630 cc 721 cc GENERAL Weight 500 lbs. (227 kg) Length 85" (218 cm) Height 56" (142 cm) Width 30" (76 cm) RPM Operating 3600 RPM Type of Fuel...
  • Page 27: Part Iv: Important Safety Information Summary Of Important Safety Information For Operation

    Summary of Important Safety Information This section provides a summary of the various safety procedures and measures that have been presented throughout the manual. Keep this summary handy and refer to it to refresh your memory about how to safely use your grinder. WARNING Carefully read and make sure you understand the following safety information before using the grinder.
  • Page 28: Personal Protective Equipment

    Summary of Important Safety Information (cont’d)  Transporting. During transporting, take precautions to make sure stump grinder will not tip over and cause a fuel leak hazard.  Hot exhaust - fires. Exhaust from engine can be extremely hot and cause fire. Position muffler at least 7 feet from combustible objects during operation.
  • Page 29 Summary of Important Safety Information (cont’d)  Other exhaust dangers. This product contains or emits chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Avoid inhalation of exhaust.  Smoking/sparks. Never smoke near the running grinder, and never operate near sources of sparks or flames. ...
  • Page 30: Special Safety Information On Static Electricity

    Special Safety Information on Static Electricity Static electricity and filling gasoline: Static electricity can initiate from ungrounded gasoline tanks or containers, from flowing gasoline, and from persons carrying a static electric charge Static electricity on numerous occasions has explosively ignited gasoline vapors that were present during fueling processes, resulting in serious burns to nearby persons.
  • Page 31: Parts Explosion

    M2961040 Exploded View – Rev H.1 Personal Protection Equipment (not shown): 174630 Reusable corded earplugs 174653 Face shield 174690 Safety eyewear 8467 Safety gloves...
  • Page 32 M2961040 Parts List – Rev H.1 Item Part # Description Model Item Part # Description Model 783896 GX630 Honda engine 2961040 785391 3/8" heat sleeve 18" 82358 1/2" shoulder bolt 784704 25hp Kohler engine 2961050 784672 Drive idler bearing 784719...
  • Page 33: Wiring Diagrams

    Wiring Diagram – Item # 2961040 (Honda)
  • Page 34 Wiring Diagram – Item # 2961050 (Kohler)
  • Page 35: Warranty

    In order to register for the warranty on your new Dosko unit, the dealer or rental owner should fill out and return to Dosko the enclosed warranty registration cards within ten (10) days after your purchase.
  • Page 36 Great Northern Equipment Distributing Inc. 20195 S. Diamond Lake Rd, Ste 100 Rogers, MN 55374 Made in USA...

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691sp-20he691sp-25ke2961050

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