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DOSKO 691SP-20HE, Owner'S Manual

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DOSKO 691SP-20HE Owner'S Manual Download Page 27

Specifications 

 

27 

 

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 

Gasoline 

Starting 

Electric 

Oil Sensor 

Yes 

CUTTER WHEEL 

 

Diameter 

14" (36 cm) 

Thickness 

3/8" (.95 cm) 

Bearings (Dia.) (2) 

1-3/16" (3 cm) 

Teeth Pockets 

Reversible 

Teeth (8) 
(Carbide Tips) 

Greenteeth® 

1/2" dia. (1.27 cm) 

1/4" thick (.635 cm) 

Disc RPM 

3000 RPM 

Drive 

Electromagnetic Clutch 

2 Gates belts 

2V-belts with Idler Bearing tensioners 

CUTTING CAPACITY 

Above Grade 

24" (61 cm) 

Below Grade 

18" (46 cm) 

Stump Diameter 

No Limit 

GROUND TRAVEL 

Speed 

0-3 MPH; Not towable 

Drive 

Hydrostatic Drive 

16-650 x 8" (480 x 20 cm) 

Brake 

Disc Brake with Adjustable Brake pads 

NOISE AND VIBRATION DATA 

Sound Pressure 

92 dBA 

103 dBA 

Sound Power 

102 dBA 

113 dBA 

Hand-Arm Vibration 

4.43 m/s² 

4.27 m/s² 

Standard Deviation  

0.75 m/s² 

0.91 m/s² 

Summary of Contents for 691SP-20HE

Page 1: ... 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 23 meters of stump grinding operation Protect cars windows and other objects within 23 meters from flying debris Be prepared for machine kick...

Page 2: ...Hazard Signal Word Definitions 2 ...

Page 3: ...5 5 Grinding the Stump 15 6 Refueling 17 7 Storing the Grinder 18 Part III Maintenance and Repair Maintenance To be done by owner or Rental Dealer 20 1 Belt Tension Adjustment 22 2 Hydrostatic Drive 23 3 Electric Clutch Engagement 23 4 Stop Switch Adjustment 24 5 Setting Sharpening Teeth 24 6 Schedule 26 Specifications 27 Part IV Important Safety Information Summary of Important Safety Information...

Page 4: ...n 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 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 7...

Page 5: ...odel 1 789537 Cut Foot Hazard All 2 789538 Thrown Object Hazard All 3 789665 Control Panel 691SP 20HE 789536 691SP 25KE 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 ...

Page 6: ...Safety Decals 6 2 1 3 789538 A B H I J K L M N C D E F G 789665 789537 ...

Page 7: ...to the left or on by turning the switch to the right I Wear eye protection while operating J Wear ear protection while operating K Wear protective footwear while operating L Wear gloves while operating M Hazards exist Read manual before operating N Move control in indicated direction to move stump grinder in same direction O Move key to point up to stop Move key to right to run Move key to far rig...

Page 8: ...priate 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 Re...

Page 9: ...anel 2 Pin Adjustment Handle Bar 3 Tire and Hub 4 Discharge Flap 5 Belt Guard 6 Tooth Pocket 7 Cutting Tooth 8 Cutter Wheel Disc 9 Cutter Guard 10 Gasoline Tank 11 Engine 12 Adjustable Brake Lever 13 Handle Bar 14 Operator Presence Handle Bar 15 Direction Control Lever ...

Page 10: ...Call 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 cutt...

Page 11: ...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 and a damaged gasoline tank If grinder is in an enclosed area and you smell gas DO NOT start engine DO NOT light ...

Page 12: ...g and disconnecting the battery WARNING Battery hazards Batteries are hazardous because they contain caustic acid can emit explosive gases and can cause electric shock Caution must be exercised when making connections to a battery to avoid shock and contact with the acid and to prevent any sparking that could lead to an explosion ALWAYS follow the general battery safety rules and instructions list...

Page 13: ... brake adjustment turn knob on top of brake lever See Maintenance and Repair section for instructions 4 Confirm Clutch on off switch is on the OFF position WARNING Stay in the OPERATOR POSITION while actuating controls Never leave grinder unattended 5 Pull Engine On off Switch to RUN position 6 For cold engine pull choke lever to full choke position To restart warm engine move choke to half choke ...

Page 14: ...t the ground 3 Use Brake Lever to set brake before leaving the controls particularly if you are on an incline 4 Turn Engine Key Switch to OFF position 5 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 bar Ignition key switch Clutch on off switch Brake lever Engine on off switch Directio...

Page 15: ...wly pivot the cutting wheel back and forth lowering the cutting wheel approximately 1 5 to 2 5 cm before each sweep until you have removed the front portion of the stump to ground level WARNING Rotating cutter wheel Keep hands and feet away Contact with wheel rotating teeth will cause serious personal injury 6 Raise cutting wheel until center of cutting wheel is just above top of stump 7 With cutt...

Page 16: ...ebris can fly 23 meters in any direction out of the chute and bounce off objects and hit operator bystanders or breakable objects 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 locatio...

Page 17: ...g 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 self propelled units or portable containers at service stations Avoid static elect...

Page 18: ...may have become loose Pay particular attention to the cutting teeth Choose a storage location Store the grinder in a location that is o Clean and dry o Away from sources of heat open flames sparks or pilot lights even if the grinder s gas tank is empty Residual gasoline could ignite o Away from extreme high or low temperatures o Covered for extra protection Remove key Remove key from starter and s...

Page 19: ...llow 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 ...

Page 20: ...after unit is stopped Allow unit to cool before servicing 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 1 763 428 2237 Replacement parts If a part needs replacement only use factory approved repair parts Replacement parts that do not meet specification...

Page 21: ...P optional Viscosity Index 80 Minimum Check and adjust brake Check that the brake is functioning properly Lock the brake push down on handle bar so that cutter wheel is off the ground Push or pull the grinder if the brake is loose the wheel will rotate To adjust braking tension Unscrew setscrew Turn knob clockwise to increase tension or counter clockwise to decrease tension Once you have set the b...

Page 22: ...ill serve as an adjustment point to counter the tension in the belts which may cause the engine pulley to be misaligned with the cutter wheel pulley 7 When belt tension is proper 15 to 19 Nm of tension or 5 mm deflection and pulleys are aligned retighten all loosened bolts and nuts 8 Reposition belt idler for hydrostatic drive 9 Reassemble belt guard Hydrostatic Belt Adjustment Adjustment is made ...

Page 23: ...gine is not running the grinder cannot be moved the hydrostatic drive is in the locked position Turn T handle clockwise to unlock the transmission This will allow freewheeling manual movement of the stump grinder 3 Electric Clutch Engagement The electric clutch needs no adjustments or lubrication CAUTION 1 Never engage clutch over 1 800 RPM 1 2 throttle Any clutch engagement over 1 800 RPM can and...

Page 24: ...d objects in the stump s environment such as dirt stones large rocks and buried scrap The loss and wear of cutting teeth can significantly impair the efficiency and performance of the stump grinder Therefore it is important to make frequent inspections of the condition of all the cutting teeth and to sharpen or replace any damaged or worn teeth Sharpening the teeth before excessive wear will resul...

Page 25: ...re installed Torque 1 Torque the pocket bolts to 245 325 Nm 2 You will notice the slotted end of the pocket bolt is about 3 mm short of the end of the threaded pocket This is okay This area will fill with dirt and protect the extraction slot at the end of the pocket bolt If you need the slot clean out the packed dirt and use the slot to turn out the broken bolt 3 To torque your tooth down tighten ...

Page 26: ... Shaft Grease X Belt Tension Tension X Bolts Tightness X Engine See manual Gasoline Amount X Safety Switches Operation X Warning Decals Legible X Tires Flaps Condition X Wires Cables Condition X Cutter Teeth Sharpness X IMPORTANT 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 ...

Page 27: ...eth Pockets Reversible Teeth 8 Carbide Tips Greenteeth 1 2 dia 1 27 cm 1 4 thick 635 cm Disc RPM 3000 RPM Drive Electromagnetic Clutch 2 Gates belts 2V belts with Idler Bearing tensioners CUTTING CAPACITY Above Grade 24 61 cm Below Grade 18 46 cm Stump Diameter No Limit GROUND TRAVEL Speed 0 3 MPH Not towable Drive Hydrostatic Drive 16 650 x 8 480 x 20 cm Brake Disc Brake with Adjustable Brake pad...

Page 28: ...hine and it s controls safely Understand and follow all safety labels Weather Never use in foul bad or questionable weather which causes a slippery ground condition Prohibition Against Modifications Never modify or alter the grinder in any way Modifications can create serious safety hazards and will also void the warranty Fuel exhaust system Never modify the exhaust system fuel tanks or fuel lines...

Page 29: ...nk to the top Gasoline may spill when operating on a slope Replace cap Replace gas cap securely before starting engine Spills Clean up fuel spills immediately Move grinder away from spilled fuel on the ground Wipe fuel off engine and wait 5 minutes for excess fuel to evaporate before starting engine Gas soaked rags should be disposed of properly On skin clothes If gasoline is spilled on your skin ...

Page 30: ...nda GX390 only Prevent accidental starting When grinder is not in use remove key from starter electric start engines and secure in a safe location or remove spark plug and disconnect positive battery terminal from battery in order to ensure that grinder cannot be started in a storage location or by untrained persons Storage location Store the grinder in a dry location away from sources of heat ope...

Page 31: ... Objects made of non conductive materials e g plastics easily accumulate and retain static electric charge as can objects made of conductive material e g metal water if they are not electrically grounded The static electric charge on an object such as a human body or plastic fuel tank container can reach as high as several thousand volts A static electric spark can be generated if the static elect...

Page 32: ...M2961040BOE Exploded View Rev C 1 32 Personal Protection Equipment not shown 174630 Reusable corded earplugs 1 174653 Face shield 1 174690 Safety eyewear 1 8467 Safety gloves 1 ...

Page 33: ...er belt guard 1 All Item Part Description Qty Model 47 785391 3 8 heat sleeve 18 All 48 82358 1 2 shoulder bolt 1 All 49 784672 Drive idler bearing 2 All 50 784628 Engine pulley spacer 1 2961050 51 784178 3 1 1 8 sheave 1 All 52 784794 1 4 x 1 4 x 3 75 key 1 2961040 82359 2961050 53 783565 1 3 16 bushing 1 All 54 784663 Electric clutch 1 All 55 789473 Clutch bracket 1 All 56 82349 1 ring clip 2 Al...

Page 34: ...Wiring Diagram Item 2961040 Honda 34 ...

Page 35: ...Wiring Diagram Item 2961050 Kohler 35 ...

Page 36: ... apply to any Dosko product which has been modified repaired or altered in such a manner as to affect its stability performance or operation nor which has been subjected to misuse abuse negligence or accident The owner is responsible for all regular maintenance as explained in the operator s manual Neglect in regular maintenance or failure to replace normal wear items such as knives bed knife lubr...

Page 37: ...37 Great Northern Equipment Distributing Inc 20195 S Diamond Lake Rd Ste 100 Rogers MN 55374 Made in USA Authorized Representative QNET BV Hommerterweg 286 6436 AM Amstenrade The Netherlands ...

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