M2961040H.1 MODEL NUMBER: 2961040, 2961050 SERIAL NUMBER: _____________ Owner's Manual Instructions for Operation, Maintenance 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.
Hazard Signal Word Definitions 2
Table of Contents Part I. Introduction About Your Grinder ..............................................................................................................4 Safety Decal Locations ............................................................................................................5 Safety Decals ............................................................................................................................ 6 Transporting & Receiving: 1. Receiving Your Unit ...................
About Your Grinder 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.
Safety Decal Locations Reference # 1 3 4 5 6 2 7 8 Part # 784272 decal kit 784291 785625 784661 786635 Description Flying Debris Hazard (person) Personal Injury / Fire, Explosion / Entanglement Hazards Amputation and Entanglement Hazard California Proposition 65 Warning Poisonous Gas Hazard Flying Debris Hazard (direction) Control Panel Burn Hazard Model # All All All All All All 2961040 2961050 All WARNING ALWAYS make sure safety labels are in place and in good condition.
Safety Decals 5 1 7 2 6 4 8 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.
Transporting and Receiving 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. New Unit: Truck Delivery 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, cardboard container or other appropriate method.
Machine Component Identification Reference # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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 8
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: 1. Marking Underground Utilities 2. Checking Controls 3. Checking/Adding Oil 4. Filling Stump Grinder Gasoline Tank 5. Inspecting Fuel System for Leaks 6. Adjusting Handle Bar 7.
Operation (cont’d) Fill Stump Grinder Gasoline Tank Check the gasoline level in the grinder's gas 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.
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 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.
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. To start the grinder: Note: For additional engine starting instructions see your Honda/Kohler engine manual.
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 presence bar Stop the engine using the following steps: 1. While holding cutting wheel off ground, release the operator presence bar, and push the Engine On/off Switch to the OFF position. Wait until the cutting wheel completely stops. 2. Use the Clutch On/off Switch to disengage clutch.
Operation (cont’d) 4. Moving the Grinder Move the grinder using the following steps: (Refer to illustration on previous page) 1. 2. 3. 4. Start engine. See "Starting the Grinder" on page 12 & 13. Release Brake Lever. Pull down on Handle, raising Cutting Wheel off the ground. Push Direction Control Lever ahead for forward travel and pull back for reverse travel. 5. Grinding the Stump WARNING: Flying Debris Hazard Stones, chips, and debris can cause serious injury or property damage.
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 Chip pile WARNING: Flying Debris Hazard Stones, chips, and debris can cause serious injury or property damage.
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. - Be aware of safety warning and instructions below for avoiding static electric caused fires.
Operation (cont’d) 7. Storing the Grinder When you are finished using the grinder and it has cooled, you must: o o o o o o 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.
Operation (cont’d) 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.
Maintenance & Repair WARNING ALWAYS shut off the engine, make sure the engine is cool, disconnect the spark plug and positive battery terminal from the battery before cleaning, adjusting, or servicing the grinder. Make sure all guards and shields are replaced before using. Maintenance Perform regular maintenance Perform periodic maintenance as directed in this manual to keep the grinder in safe working condition.
Maintenance & Repair (cont’d) Lubricate Cutter shaft bearings should be greased. The cutter shaft bearing is greased by pumping grease into zerks located on the housing of the bearing. Cutting wheel Grease zerks Bearing Grease Specification Lithium Complex #2 230°C (446°F) Corrosion and Oxidation inhibitors, EP optional 80 Minimum Soap Type NLGI Grade Dropping Point Additives Viscosity Index Check and adjust brake Check that the brake is functioning properly.
Maintenance & Repair (cont’d) 1. Belt Tension Adjustment Note: Belt tension and alignment are inter-related. Do not adjust one without checking the other. 1. 2. 3. 4. 5. 6. Remove belt guard. Loosen hydrostatic drive belt idler. Loosen (4) engine base (mount) bolts. Loosen lock nut on tension bolt and alignment bolt. Turn tension bolt clockwise to increase belt tension and counterclockwise to decrease belt tension. Check that the pulleys are aligned using a straight edge.
Maintenance & Repair (cont’d) 2. Hydrostatic Drive Neutral Adjustment The drive itself contains no adjustments. The ground control lever, when in automatic neutral position, should not allow any forward or rearward creeping of the grinder (providing the grinder is on level ground – on unlevel ground, see brake control instructions). Neutral position is adjusted by removing the quick disconnect from the control arm, located on the bottom side of the transmission.
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. To set the proper Hex nut interaction distance, lower the Linkage Bolt onto the Switch Button until you hear the switch "CLICK".
Maintenance & Repair (cont’d) 7. Rotate the wheel until you come to the next set of straight teeth. Repeat steps 2 – 6. 8. Next, replace the angle pockets (angles occur away from the wheel). 9. Remove one set at a time or all old angle teeth and pockets at once. Clean the wheel with a wire brush. 10. Install your pocket bolt through the holes in the counterbored pocket. Apply anti-seize. Slide the pocket bolts through the holes in the wheel.
Maintenance & Repair (cont’d) 6.
Specifications ENGINE OPTIONS Make Model CC Rating GENERAL Weight Length Height Width RPM Operating Type of Fuel Starting Oil Sensor CUTTER WHEEL Diameter Thickness Bearings (Dia.) (2) Teeth Pockets Teeth (8) (Carbide Tips) Disc RPM Drive CUTTING CAPACITY Above Grade Below Grade Stump Diameter GROUND TRAVEL Speed Drive Brake 2961040 2961050 Honda GX630RTXF2 630 cc Kohler CH730-0002 721 cc 500 lbs. (227 kg) 85" (218 cm) 56" (142 cm) 30" (76 cm) 3600 RPM Gasoline Electric Yes 14" (36 cm) 3/8" (.
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.
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. Fire extinguisher. Keep a fire extinguisher rated "ABC" by the National Fire Protection Association nearby is always recommended when using gasoline-operated machinery.
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. Hot muffler. Never touch hot muffler or hot exhaust manifold. Exhaust and engine parts can be very hot and will burn you. Machine's moving parts.
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.
M2961040 Exploded View – Rev H.
M2961040 Parts List – Rev H.
Wiring Diagram – Item # 2961040 (Honda) 33
Wiring Diagram – Item # 2961050 (Kohler) 34
Limited Warranty Policy August 2010 This warranty is limited to Dosko units distributed by Great Northern Equipment Distributing, Inc. 20195 South Diamond Lake Road, Rogers, MN and sold by dealers or distributors authorized to sell that product. The following warranty applies to Dosko units purchased at retail or placed into rental service on or after August 1st 2010.
Great Northern Equipment Distributing Inc. 20195 S.
