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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 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.
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' 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: 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
Owner's Manual
Instructions for Operation, Maintenance
WARNING
M2961040A
MODEL NUMBER: 2961040, 2961050
SERIAL NUMBER: _____________
STOP!
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Related Manuals for DOSKO M2961040A
Summary of Contents for DOSKO M2961040A
- 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 blade in sweeping movements laterally over the top and front of the stump, you can gradually grind it away.
- Page 2 Hazard Signal Word Definitions...
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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 blade in sweeping movements laterally over the top and front of the stump, you can gradually grind it away. -
Page 5: Safety Decal Locations
Safety Decal Locations Reference # Part # Description Model # 784262 Flying Debris Hazard (person) 784291 Flying Debris Hazard (direction) 784271 Personal Injury / Fire, Explosion / Entanglement Hazards 783542 Amputation and Entanglement Hazard 784260 California Proposition 65 Warning 784226 Poisonous Gas Hazard 784661 Control Panel... -
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
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. New Unit: Truck Depending on your unit and model, it may have been shipped on a wooden skid, 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) Check the gasoline level in the grinder’s gas tank. If needed, fill tank with Fill stump grinder 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.
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Page 11: Starting The Grinder
Operation (cont’d) 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. - Page 12 Operation (cont’d) 11) When engine starts, move choke lever to RUN position and turn Throttle slowly to full OPEN position. WARNING: A rotating cutting blade is very dangerous. Stay at the controls and keep others away until you are sure the blade has come to a complete stop. Operator presence bar Handle bar Brake lever...
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Page 13: Stopping Engine
Operation (cont’d) 3. Stopping the Engine Operator Stop the engine using the following steps: Direction presence bar control lever 1. While holding blade off ground, release the operator presence bar, and push the Engine On/off Switch to the OFF position. Wait until the blade completely stops. -
Page 14: Grinding The Stump
Operation (cont’d) 5. Grinding the Stump WARNING: Flying Debris Hazard Stones, chips, and debris can cause serious injury or property damage. Debris can fly 75 ft in any direction out of the chute. They can bounce off any fixed objects as well and hit operator, bystanders or breakable objects. 1. -
Page 15: Refueling
Operation (cont’d) WARNING: Flying Debris Hazard Stones, chips, and debris can cause serious injury or property damage. Debris can fly 75 ft in any direction out of the chute and bounce off objects and hit operator, bystanders or breakable objects. ... -
Page 16: Storing The Grinder
Operation (cont’d) 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 self propelled units or portable containers at service stations: Avoid static electric sparking while filling the gasoline tank: Never fill the grinder’s gas tank directly from the fuel pump. - Page 17 Operation (cont’d) o Away from extreme high or low temperatures. o Covered for extra protection Remove key Remove key from starter and secure key in a safe location, or remove spark plug, in order to ensure the grinder cannot be started in a storage location or by untrained persons or children.
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Page 18: 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 19 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)
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Page 20: 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 21: Hydrostatic Drive
Maintenance & Repair (cont’d) 2. Hydrostatic Drive Neutral Adjustment The drive itself contains no T-handle adjustments. The ground control lever, Transmission when in automatic neutral position, should not allow any forward or Quick rearward creeping of the grinder disconnect (providing the grinder is on level ground –... -
Page 22: 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 23 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;...
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Page 24: 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 25: Specifications
Specifications 2961040 2961050 ENGINE OPTIONS Make Honda Kohler Model GX620R1TXF2 CH730-0002 CC Rating 620 cc 721 cc GENERAL Weight 500 lbs. (227 kg) 85” (218 cm) Length 56” (142 cm) Height 30” (76 cm) Width RPM Operating 3600 RPM Type of Fuel Gasoline Starting Electric... -
Page 26: 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 27 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 28 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. ...
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Page 29: 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 30: Parts Explosion
M2961040 Exploded View – Rev A... - Page 31 M2961040 Parts List – Rev A Item Part # Description Model Item Part # Description Model 3”, 11/16” sheave 783940 GX620 Honda engine 2961040 784793 A2340 belt, 784704 25hp Kohler engine 2961050 784182 784719 Shield transmission 1/4” Hose clamp 784141 Neutral T-handle 777834 1/4”...
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Page 32: Wiring Diagrams
Wiring Diagram – Item # 2961040 (Honda) - Page 33 Wiring Diagram – Item # 2961050 (Kohler)
- Page 34 This page has intentionally been left blank.
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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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