DR® STUMP GRINDER SAFETY & OPERATING INSTRUCTIONS
Contents
1. DR STUMP GRINDER SAFETY amp OPERATING INSTRUCTIONS DR Power Equipment Serial No Toll free phone 1 800 DR OWNER 376 9637 Fax 1 802 877 1213 Order No Original Language Website www DRpower com WARNING WARNING Read and understand this manual and all instructions before operating the DR STUMP GRINDER Table of Contents Chapter 1 General Safety 3 Chapter 27Setting Up The DR STUMPGRINDER a a 6 Chapters Operating The DR STUNIP GRINDER ANAN AA AA 11 Chapter 4 Maintaining The STUMP 14 Chapter Se MOUDE NOONE esee 22 Chapter Parts Lists Schematic 24 Conventions used this manual WARNING WARNING This indicates a hazardous situation which if not avoided could result in death or serious injury CAUTION CAUTION This indicates a hazardous situation which if not avoided could result in minor or moderate injury This information is important in the proper use of your machine Failure to follow this instruction could result in damage to your machine or property Serial Number and Order Number A Serial Number is used to identify your machine and is located on the Serial Number Label on your machine An Order Number is used to check and maintain your order h2. 19 18012 Pulley Flat Idler 3 1 4 20 12686 Bolt HHCS 3 8 16 x2 Gr5 30505 Tooth Kit 21 16413 Nut Nylon Lock 3 8 16 Low Profile 22 18887 Label Hot Surface 26 DR STUMP GRINDER n EN Schematic DRIVE ASSEMBLY see next page for 9HP specific parts CONTACT US AT www DRpower com 27 Parts List DRIVE ASSEMBLY 9HP specific parts NOTE Part numbers listed are available through DR Power Equipment Ref Part Description 01 27172 Frame w Labels 02 26536 Bolt Serrated Flange M6 1x16 03 11241 Washer Flat 5 16 Uss 04 12334 Bolt Hhcs 3 8 16 x 1 3 4 Gr 5 Zp 05 26485 Wire Harness Manual Start 28690 Wire Harness Electric Start 06 12781 Label Warning Add Oil 07 28347 Engine w Labels Subaru 9HP 28703 Engine W Label 13 74 Subaru E S 08 18887 Label Hot Surface R C 28 DR STUMP GRINDER Ref Part Description 09 26533 Clutch Centrifugal 1 Bore 10 26563 Belt Stump Grinder 9HP 11 27140 Spacer 1 ID 1 375 OD 313 Th 12 27164 Washer 47 14 1 4 Od 15 Th 13 22911 Bolt Hhcs 7 16 20 X 1 Gr 8 Locking Patch 14 11075 Nut Nylon Lock 3 8 16 15 26568 Shim 1 ID 1 375 OD x 16 Th Parts List and Schematic AXLE ASSEMBLY NOTE Part numbers listed are available through DR Power Equipment Refit Part Description 01 24744 Wheel 14 5 x 7 6 2 Ply Gray 02 17882 Bolt Hcs 5 16 24 x 1 03 11243 Washer Lock Split 5 16 04 16514 Washer 385 ID 1
3. Check that Engine is clean of debris Check the general condition of the Stump Grinder e g nuts bolts welds etc Check Belt for wear and or stretching Check Tire Pressure and wear Check the Teeth for wear and damage Check the Frame for wear and damage Check the Debris Guard for wear and damage Remove any debris wrapped around the Cutter Head for Bearing protection es kad kad kad End of Season and Storage WARNING WARNING Before performing any maintenance procedure or inspection stop the engine wait five 5 minutes to allow all parts to cool Disconnect the spark plug wire keeping it away from the spark plug Change the engine oil Clean or replace the Air Filter Check the teeth for wear and damage Remove any debris wrapped around the Cutter Head If your DR STUMP GRINDER will be idle for more than 30 days we recommend using a gas stabilizer This will prevent sediment from gumming up the Carburetor If there is dirt or moisture in the gas or tank remove it by draining the tank Completely fill the tank with fresh unleaded gas and add the appropriate amount of stabilizer or gasoline additive Run the Engine for a short time to allow the additive to circulate e Clean the exterior of the unit to remove all dirt grease and any other foreign material To prevent rust touch up painted surfaces that have been scratched or chipped e Be sure all nuts bolts and screws are sec
4. Plastic Straps that are securing the Stump Grinder to the Pallet unlock the Brake by gripping the Brake Lever then releasing it and roll the Stump Grinder from the Pallet Figure 4 Do not discard the shipping materials until you are fully satisfied with your new DR STUMP GRINDER Adding Oil and Gasoline Engine Oil SAE 30 above 50 degrees 10w 30 10 90 degrees 5w 30 30 degrees F or below Figure 3 Unleaded gasoline nonce a e You must add oil before starting the engine This machine is shipped without oil Traces of oil may be in the reservoir from factory testing but you must add oil before starting the engine Fill the reservoir slowly checking the level frequently to avoid overfilling e To get an accurate reading when checking the oil level The Engine must be level The dipstick should not be screwed down to ensure an accurate oil Figure 4 level reading NOTE Use only the recommended high detergent engine oil Other types of oil could cause problems operating your machine Please refer to your Engine Owner s Manual for detailed oil information 1 Position the machine so the Frame and Engine are level Remove the Oil Fill Dipstick Figure 5 and clean the end of it with a rag nonce Ca The Frame and Engine must be level to get accurate reading when adjusting the oil level Use blocks to adjust the height of the cutting head to level the Frame 2 Machines are shipped with no o
5. are clean and tight The Battery may not be charged Check the voltage yourself or at a Service Station If it is low charge it with a 12 volt 1 to 2 amp trickle Charger If you do not use your machine for at least 45 minutes at a time the Battery may need to be periodically charged See the Battery Care section in Chapter 4 If your Engine still won t start visit our website at www DRpower com Make sure the Choke Lever is all the way off The Air Filter may be dirty change it following the procedure in the Engine Owner s Manual The Spark Plug may be dirty or cracked change it if necessary The gas may be old change it if necessary Use a fuel stabilizer if you keep gas longer than one month The Engine oil may be dirty Change it if necessary Check that the Cooling Fins are clean and free of debris Clean as needed If your Engine still lacks power visit our website at www DRpower com Troubleshooting Table Continued A WARNING Set the Wheel Brake shut down the engine remove the spark plug wire and wait 5 minutes before performing any maintenance procedure or inspection on the Stump Grinder SYMPTOM POSSIBLE CAUSE Engine smokes Check the oil level and adjust as needed Clean the Engine cooling fins and the carburetor housing if they are dirty The Air Filter may be dirty change it following the procedure in the Engine Owner s Manual You may be using the wrong oil Refer to your Engine Owner s Man
6. closest to you not touching near the top edge Figure 13 4 Lock the Hand Brake by pulling the Brake Lever sliding the Lock forward and releasing the Lever 97 Always make sure the Teeth are not in contact with anything before operating the Throttle Lever The Clutch will be damaged if the teeth are not free to turn as you start to press the Throttle UJ 5 Fully Squeeze the Throttle Lever on the right side Handlebar this will engage the Cutter Head Rotation Let the Cutter Head come up to speed o Lower the Cutter Head approximately 1 2 to 1 into the front top corner of the stump and slowly swing the Cutter Head to the left into the stump by pushing on the right hand handlebar Figure 14 When you are finished with the first pass through the Stump swing the Cutter Head back to the starting position on the right side Lower the Cutter Head approximately 1 2 to 1 and slowly swing the Cutter Head to the left through the Stump Continue this process until you have removed the front portion of the stump to ground level norce If the Engine bogs down lift the Cutting Head away from the stump to allow the Cutting Head to come back up to speed before further cutting 7 Swing the Cutter Head over to the right side Figure 15 arrow 1 advance the machine forward arrow 2 by releasing and resetting the brake The machine should only be advanced far enough to engage the Cutter Head into the stump so that
7. right if the engine is already warm On NOTE The Operator Presence Lever must be held down for the Engine to start and continue running If you need to stop the machine quickly for any reason let go of the Operator Presence Lever 4 Hold down the Operator Presence Lever and slowly pull the Starter Cord until you feel resistance then pull quickly The Cord will recoil back into position 5 As the engine warms up slowly adjust the Choke to the right towards the run position Wait until the engine runs smoothly before each Choke adjustment 6 When the Engine is warmed up and running smoothly ensure that the Choke is fully in the run position to the right Starting the Engine Electric Start 1 Make sure the Fuel Shut off is in the OPEN position Figure 11 2 Move the Choke Control Lever to the left to the choke position leave in the run position to the right if the engine is already warm NOTE The Operator Presence Lever must be held down for the Engine to start and continue running If you need to stop the machine quickly for any reason let go of the Operator Presence Lever Figure 11 CONTACT US AT www DRpower com 11 Key Switch 3 Hold down the Operator Presence Lever and turn the Key Switch fully to the Start position until the engine starts Figure 12 The Key will move back a bit from the full Start position when released 4 As the engine warms up slowly adjust the Choke to the righ
8. 390 OD 3 8 Th 05 26469 Bushing Bronze 75 OD 63 ID 06 26564 Axle 07 24677 Key Square 3 16 x 1 08 26486 Brake Drum 09 12321 Bolt 5 16 18 x 3 4 10 11238 Washer Flat 1 4 Uss 1 26473 Brake Band 12 16413 Nut Lock 3 8 16 Lo Profile 13 12336 Bolt Hhcs 5 16 18 x 1 1 4 Gr5 Zp 14 15 16 17 18 19 20 21 22 23 24 25 26 11076 11126 12969 26477 11073 11237 11983 24230 13447 14386 28697 25862 28320 Ref Part Description Nut Nylon Lock 5 16 18 Ring Retaining 3 4 Ext Shim 3 4 ID 1 1 8 OD 1 16 L Zp Bushing Flange 3 4 ID Nut Nylon Lock 1 4 20 Washer Flat 10 Uss Bolt Hhcs 1 4 20 x 3 4 L Hold Down Battery Battery 9AH 12V Pad Battery 1 38 x 7 0 Pad Battery 2 5 x 6 125 Bracket Battery Clamp Tube 7 16 Vinyl coated CONTACT US AT www DRpower com 29 Notes 30 DR STUMP GRINDER age Notes CONTACT US www DRpower com 31 C C 6 gqIO h 02hmr9 Daily Checklist for the DR STUMP GRINDER To help maintain your DR STUMP GRINDER for optimum performance we recommend you follow this checklist each time you use your Stump Grinder WARNING WARNING Before performing any maintenance procedure or inspection stop the engine wait five 5 minutes to allow all parts to cool Disconnect the spark plug wire keeping it away from the spark plug Check the engine oil and Gas Tank level
9. Check General Equipment Condition Clean Engine Exterior amp Cooling Fins Remove debris wrapped around Cutter Head for Bearing protection Check Tire Pressure Check Cutting Teeth are they dull or damaged Replace Belt if stretched or worn Clean Air Filter Lubricate Cables SAE 30 Oil Change Engine Oil Replace Cutting Teeth or sooner if dull or damaged 4 Check Cutter Head when Teeth are replaced 1 Replace Cutter Head order 30506 101 A4 Replace Spark Plug Replace Air Filter Removing and Replacing the Engine Oil Tools and Supplies Needed e 14mm Wrench e 1 2 Wrench electric start only e Rags and approved Container for waste oil e Small funnel e Engine Oil see your Engine Manual for Oil specifications HIN Batt wr The Frame and Engine must be level to get an accurate reading when Locknut adjusting the oil level Use blocks to adjust the height of the cutting head to inside Frame level the Frame Battery Bracket Figure 16 1 For Electric Start machines you will first need to disconnect the Battery Terminals and remove the Battery Bracket by removing the two Locknuts from the Bracket Studs with a 1 2 Wrench leave Battery attached to Bracket Figure 16 14 DR STUMP GRINDER Position the machine so the Frame and Engine are level and place Waste Oil Container under the Oil Drain Plug Figure 17 Remove the Oil Drain Plug with a 14mm Wrench an
10. F ITEM 31 ELECTRIC START ONLY 21 MANUAL START ONLY CONTACT US AT WWW DRpower com 25 Parts List DRIVE ASSEMBLY see page 24 for 9HP specific parts list NOTE Part numbers listed are available through DR Power Equipment Ref Part Description Ref Part Description 01 26531 Engine Subaru 6HP w Labels 23 16480 Spring Ext 3 4 OD 085 Wire 3 L 02 13443 Bolt 5 16 18 x 1 1 2 24 13443 Bolt 5 16 18 x 1 1 2 03 11238 Washer Flat 1 4 USS 25 11069 Nut 5 16 18 ZP Gr2 04 11076 Nut Nylon Lock 5 16 18 26 26472 Pulley 4 5 Diam 05 26521 Clutch Centrifugal 3 4 Bore 27 25802 Bearing Stamped Flange 1 Bore 06 17882 Bolt HCS 5 16 24 x 1 28 11158 Bolt HCS 5 16 18 x 1 Gr5 ZP 07 16514 Washer 385 ID 1 390 OD 3 8 TH 29 26474 Guard Pulley 08 26468 Belt Stump Grinder 6HP 30 26483 Ring Retaining 1 Shaft 09 26528 Guard Belt w Labels 31 30409 Bolt Pocket 10 12321 Bolt HCS 5 16 18 3 4 32 30406 Tooth 11 11243 Washer Lock Split 5 16 33 30408 Pocket Straight 12 25709 Label Safety Icons 34 30407 Spacer Tooth 13 19239 Label DR Logo 5 3 4 Silver 35 11076 Nut Nylon Lock 5 16 18 ZP 14 26566 Arm Idler Pulley 36 29417 Cutter Head Dual Straight Teeth 15 26535 Bolt Shoulder 1 2 x 3 4 Long 37 12781 Label Warning Check Oil 16 24677 Key Square 3 16 x1 FBP 38 26485 Wire Harness 17 11241 Washer Flat 5 16 USS 39 142291 Key Square 1 4 x 1 1 4 18 26482 Deflector Exhaust
11. HP or 5 8 Wrench 9HP onto the Clutch Bolt and rotate the Wrench counterclockwise until you feel some resistance Figure 25 e 2 Hit the Wrench with a Dead Blow Hammer to start the Bolt turning on the Engine Shaft 3 Remove the Bolt Lock Washer Large Flat Washer and Clutch with Key from the Engine Shaft 4 Apply a never seize type grease to the Engine Shaft and install the new Clutch and Key align the Clutch Key Slot with the Key on Engine Shaft and secure with the Bolt Lock Washer and Large Flat Washer using a 1 2 Wrench 6HP or 5 8 Wrench 9 Lubricate Cables Supplies needed e SAE 30 Oil 1 Lubricate the upper ends of the Throttle and Brake Cables with SAE 30 Oil where the cable goes into the sheathing 2 Work the Cable Levers to work the Oil in between the Cable and Sheathing Adjusting the Handlebars Supplies needed e Two 9 16 Wrenches e 1 2 Wrench 1 Remove the left Wheel as described in the Replacing the Wheels section NOTE The Brake Lever can be locked to aid in loosening the Hardware in the next step but must be unlocked to remove the Brake Drum 2 Remove the four Bolts Lock Washers and Flat Washers from the Brake Drum with a 1 2 Wrench and pull the Drum from the Axle Figure 26 3 Remove the bottom Bolt Flat Washers and Locknuts from both Handlebars with two 9 16 Wrenches and just loosen the upper Hardware Figure 27 4 Rotate the Handlebars forward to
12. When the Cable is adjusted correctly and the Brake Lever is locked the left side Wheel will still rotate in reverse towards the operator with some effort but should not rotate forward Loosening the Brake Cable if the Brake does hold the Wheel in place but pushing the machine with the Brake off is difficult 1 As you rotate the Wheel forward with Wheel Lever unlocked loosen the upper Nut until the Wheel turns more freely but you still feel a slight resistance at the Wheel Figure 28 2 Tighten the lower Nut up against the Bracket 3 Lower the Stump Grinder to the ground and test the Brake and pivoting side to side action gt 4 If the left side Wheel holds when the Brake is applied but the machine is Loosen hard to push ahead when the Brake is released the Cable needs more 21 4 Turn loosening Repeat steps above as needed 2 er Adjusting The Throttle Linkage Over time friction may increase in the Throttle Linkage If the throttle lever does not return fully to low idle the throttle Pivot Nut need adjustment Tools needed e 10mm Socket e Ratchet and Extension 1 Loosen the Throttle Pivot Nut 1 4 turn counterclockwise and test the Throttle Lever Figure 29 If the Throttle Lever fully returns to low idle it is working properly If there is still some hesitation of the Throttle Lever fully returning to low idle turn the Throttle Pivot Nut another 1 4 turn and retest as n
13. adjust them higher or back to make them lower and align with the holes in the Frame 5 Reinstall the bottom Bolt Flat Washers and Locknuts into both Handlebars and tighten all Handlebar Hardware with two 9 16 Wrenches 6 Reinstall the Brake Drum and Wheel on the left side of the machine When the Handlebars are adjusted to the highest setting you should change the position of the Exhaust Deflector so it is oriented 45 downward to the left so it is not pointing directly at the Handlebar The paint may be damaged if the Deflector is not rotated 18 DR STUMP GRINDER Adjusting The Brake Tools and supplies needed Brake Cable e 1 2 Wrench e Blocking Material NOTE You must block the machine up so the left side Wheel is just off the ground and can rotate freely to perform the following steps Adjusting Tightening the Brake Cable if the Brake does not hold the Wheel in Nuts place Spring 1 Loosen the lower nut a few turns so it moves away from the Bracket Figure 28 2 As you rotate the Wheel forward with Wheel Lever unlocked tighten the upper Nut until you feel a slight resistance at the Wheel Figure 28 3 Tighten the lower Nut up against the Bracket 4 Lower the Stump Grinder to the ground and test the Brake and pivoting side to side action 5 If the left side Wheel rotates forward while the Brake Lever is locked the Cable needs more tightening Repeat steps above as needed NOTE
14. agement District or your local waste handler to locate the collection site nearest you Some collection sites recycle Batteries year round others collect them periodically You can also visit the Web site of Earth 911 for more information www earth911 org For a fee you can recycle your Batteries with the International Metals Reclamation Company Visit them at www inmetco com and click Services or contact them at INMETCO One INMETCO Drive Ellwood City PA 16117 724 758 2800 fax 724 758 2845 To learn more about hazardous waste recycling visit the Web site for Battery Council International www batterycouncil org or for the Environmental Protection Agency www epa gov CONTACT US www DRpower com 21 Chapter 5 Troubleshooting Most problems are easy to fix Consult the Troubleshooting Table below for common problems and their solutions If you continue to experience problems contact us at www DRpower com or call toll free 1 800 DR OWNER 376 9637 for support WARNING WARNING Set the Wheel Brake shut down the engine remove the spark plug wire and wait 5 minutes before performing any maintenance procedure or inspection on the Stump Grinder Troubleshooting Table SYMPTOM POSSIBLE CAUSE 22 Recoil will not pull out or is difficult to pull The Engine will not start Please refer to the Engine Owner s Manual for Engine specific procedures The Engine lacks power or Is not running smoot
15. d let the Oil drain into the Container 4 Replace the Oil Drain Plug and remove the Oil Fill Dipstick 5 Initially add 16 oz of oil type of oil recommended by the Engine Manufacturer into the Oil Fill and wait one minute for the oil to settle 6 Check the Dipstick and continue adding a few ounces of oil at a time rechecking the Dipstick until the oil reaches the fill mark Be careful not to overfill 7 Replace the Battery Bracket for electric start machines and reconnect the Battery Replacing the Belt Tools and Supplies needed e e e Two 1 2 Wrenches 9 16 Wrench New DR Drive Belt see chapter 6 for part numbers Gloves Remove the Bolt Lock Washer and Flat Washer from the rear of the Belt Guard with a 1 2 Wrench Figure 18 Slightly loosen the Bolt Washers and Lock Nut at the front of the Belt Guard with two 1 2 Wrenches and rotate the Guard forward NOTE You may need to pull out on the bottom edge of the Guard as you rotate the Belt Guard to clear the Frame You should wear Gloves as you position 9 16 Wrench onto the Idler Pulley Bolt and inline with the Pulley Bracket Figure 19 Pull the Wrench to rotate the Belt Tensioner away from the Belt and then remove the Belt from under the Idler Pulley Roll the Belt off the top of the Clutch Pulley by rotating the Cutting Head in the reverse direction as you guide the Belt off to the side at the top of the Pulley Remove the Belt fro
16. e with the air cleaner or the carburetor air intake cover removed Removal of such parts could create a fire hazard Do not use flammable solutions to clean the air filter e The muffler and engine become very hot and can cause a severe burn do not touch 4 DR STUMP GRINDER General Safety WARNING WARNING Operating this Stump Grinder safely is necessary to prevent or minimize the risk of death or serious injury Unsafe operation can create a number of hazards for you Always take the following precautions when operating this Stump Grinder e Your Stump Grinder is a powerful tool not a plaything Exercise extreme caution at all times The machine is designed to grind stumps Do not use it for any other purpose e Know how to stop the Stump Grinder quickly see stopping the engine in chapter 3 Never operate your unit on a slippery wet muddy or icy surface Exercise caution to avoid slipping or falling See manufacturer s instructions for proper operation and installation of accessories Only use accessories approved by DR Power Equipment e Never use the machine without ensuring that all guards and shields are in place Never under any conditions remove bend cut fit weld or otherwise alter standard parts on the Stump Grinder This includes all shields and guards Modifications to your machine could cause personal injuries and property damage and will void your
17. ediately 1 800 DR OWNER Before Starting Engine CONTROL START 19320 gt CUTTING HEAD HOT ROTATION Use Caution y When Children On Slopes Rotating Parts Or Others Are Rotating Parts Around 18887 25709 26488 18887 23545 13758 15345 Protecting Yourself and Those Around You A WARNING This is a high powered machine with moving parts operating with high energy You must operate the machine safely Unsafe operation can create a number of hazards for you as well as anyone else in the nearby area Always take the following precautions when using this machine e Keep mind that the operator or user is responsible for accidents or hazards occurring to other people their property and themselves e Always wear protective goggles or safety glasses with side shields while using the STUMP GRINDER to protect your eyes from possible thrown debris e Avoid wearing loose clothing or jewelry which can catch on moving parts We recommend wearing gloves while using the STUMP GRINDER Be sure your gloves fit properly and do not have loose cuffs or drawstrings e Wear shoes with non slip treads when using your STUMP GRINDER If you have safety shoes we recommend wearing them Do not use the machine while barefoot or wearing open sandals e Wear long pants while operating the STUMP GRINDER e Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing Keep bystanders at least 50
18. eeded NOTE The Throttle Pivot Nut should not be loosened to the point that the Throttle Linkage is too loose has excessive play If the problem persists please contact us at www DRpower com or call 1 800 DR OWNER 376 9637 for Figure 29 assistance CONTACT US AT www DRpower com 19 Battery Care For Electric Starting Models Only Proper care can extend the life of a Battery Follow these recommendations to ensure your Battery s best performance and long life e Do not allow the Battery charge to get too low If the machine is not used charge the Battery every 4 6 weeks Operate the engine for at least 45 minutes to maintain proper Battery charge e Store an unused Battery a dry environment with temperatures between 40 F 1 5 7C and 95 F 35 C Make sure the storage temperatures will never be outside of these limits The lower the storage temperature is within the specified temperature the better as the battery will discharge more slowly at low temperatures e Do not charge an already charged Battery In theory you cannot overcharge our Battery with a trickle charger however when a Battery is fully charged and the charger is still on it generates heat that could be harmful to the Battery A fully charged Battery will read 12V 13 2V with a voltmeter e Do not continue to crank your Engine when the Battery charge is low Charging the Battery Novice Aa When you are finished charging the battery disconnect t
19. er Throttle Lever Gas Fill Oil Fill Belt Guard Starter Cord Pneumatic Tires On Off Ignition Switch 6HP This Switch is Disconnected on 9HP Manual Start Models and not needed for Starting Carbide Teeth Figure 6 DR STUMP GRINDER DR STUMP GRINDER Controls and Features Electric Start 1 Start Key Switch Maintenance Meter Operator Presence Lever Brake L Throttle Lever Oil Fill REAR VIEW Gas Fill y 7 7 Shut off Starter Cord Pneumatic Tires Carbide Teeth Figure 1b CONTACT US AT www DRpower com 7 Specifications Engine 6HP Subaru Manual Start 9HP Subaru Manual Start 9HP Subaru Electric Start Please refer to the Engine Please refer to the Engine Please refer to the Engine Owner s Manual for Engine Owner s Manual for Engine Owner s Manual for Engine specifications specifications specifications 14 5 Pneumatic 14 5 Pneumatic 14 5 Pneumatic Height adjustable to 32 36 5 Height adjustable to 32 36 5 Height adjustable to 32 36 5 and 40 and 40 40 Ba Welded 12 ga steel Welded 12 ga steel Welded 12 ga steel construction construction construction Bet v 8elt Bet AP47 49 3 OD 47 3 ID BP47 49 8 OD 47 3 ID BP47 49 8 OD 47 3 ID Construction Wrapped for abrasion Wrapped for abrasion Wrapped for abrasion resistance resi
20. feet away from your work area at all times Stop the engine when another person or pet approaches CONTACT US AT www DRpower com 3 Safety for Children and Pets WARNING WARNING Tragic accidents can occur if the operator is not alert to the presence of children and pets Children are often attracted to the machine and the grinding activity Mever assume that children will remain where you last saw them Always follow these precautions e Keep children and pets at least 50 feet from the working area and ensure they are under the watchful care of a responsible adult e Be alert and turn the machine off if children or pets enter the work area Never allow children to operate the STUMP GRINDER Safety with Gasoline Powered Machines WARNING WARNING Gasoline is a highly flammable liquid Gasoline also gives off flammable vapor that can be easily ignited and cause a fire or explosion Never overlook the hazards of gasoline Always follow these precautions e Never run the engine an enclosed area or without proper ventilation as the exhaust from the engine contains carbon monoxide which is an odorless tasteless and deadly poisonous gas e Store all fuel and oil in containers specifically designed and approved for this purpose and keep away from heat and open flame and out of the reach of children e Replace rubber fuel lines and grommets when worn or damaged and after 5 years of use e Fill the gasoline tank o
21. ge Tools and Supplies needed e 1 2 Wrench e Dead Blow Hammer e Gloves CAUTION Wear Gloves when working near the teeth Without Gloves your hands may get cut from the sharp edges Block the front end of the Stump Grinder so the Cutter Head is just off the ground Note It may help to mark the Dull cutting edge prior to rotating the Teeth so you can be sure you have rotated to an unused cutting edge 2 Loosen the Locknut on the Tooth until the top of the Locknut is flush with the top of the Tooth threads Figure 21 3 Lightly tap on the top of the Locknut with a Dead blow Hammer so the Tooth will drop down away from the Tooth Mount Figure 22 4 Rotate the Tooth until the next flat area on the side of the Tooth is aligned with the flat area of the Mount Figure 23 5 After the tooth has been turned to the desired position push the Tooth up into the Mount and tighten the Locknut There are no torque specification needed for the Locknut but make sure you tighten them firmly 6 Repeat steps 2 5 for the remaining Teeth as needed Replacing the Cutting Teeth Tools and Supplies needed 1 2 Wrench 1 2 Socket Torque Wrench Dead Blow Hammer Gloves CAUTION Wear Gloves when working near the teeth Without Gloves your hands could suffer cuts from the sharp Teeth Locknut 1 Block the front end of the Stump Grinder so the Cutter Head is just off the ground Spacer 2 Remove the Locknut fro
22. he charger from the outlet first then disconnect the battery charger wires from the battery If you leave the battery charger wires connected to the battery the battery will discharge itself back into the charger Operate the Engine for at least 45 minutes to maintain proper Battery charge If the Battery loses its charge you will need to use a trickle charger like the DR Battery Charger to recharge it The Charger should have an output of 12 volts DC at no more than 2 amps e At 1 amp the Battery may need to be charged for as long as 48 hours At 2 amps the Battery may need to be charged for as long as 24 hours NOTE Using the Recoil Starter and then running the Engine will not recharge a dead or significantly discharged Battery To connect a Battery Charger to your DR STUMP GRINDER follow the steps listed below 1 Attach the Black alligator clipped wire from the Charger Adapter to the Negative terminal of the Battery then attach the Red alligator clipped wire to the Positive Battery terminal 2 Plug the Charger into a standard wall outlet e Typically the Battery takes between 6 and 8 hours to fully charge Do not leave the charger on the battery longer than 24 hours for a 2 amp charger or 48 hours for a 1 amp charger as you could potentially damage the battery You can charge the Battery many times The Battery lasts longer if you charge it before it is fully drained Keep it fully charged and at room tempera
23. hly Please refer to the Engine Owner s Manual for engine specific procedures DR STUMP GRINDER There may be an oil compression lock in the cylinder Take out the Spark Plug hold a rag over the Spark Plug hole and pull the Recoil Cord several times to blow out any oil in the Cylinder Wipe off the Spark Plug and reinstall it Check the Engine oil level the Engine may be seized The Recoil may be broken or jammed Visit our website at www DRpower com Make sure the Operator Presence Lever is held down and that the Ignition Switch is in the RUN position Manual Start or the Key is inserted into the Key switch and rotated to the right Electric Start Check the oil and gas level Make sure that the Fuel Shut Off is in the ON position Check that the Spark Plug Wire is attached The Air Filter may be dirty change it following the procedure in the Engine Owner s Manual The gas may be old change it if necessary Use a fuel stabilizer if you keep gas longer than one month Check the Throttle and Choke settings adjustment and travel The Spark Plug may be dirty or cracked change it if necessary If it s oily leave it out hold a rag over the Plug Hole and pull the Recoil Cord several times to blow out any oil in the Cylinder then wipe off the Plug and reinsert it Check the wire connections especially the ground connections to the Engine and the Starter connections Check to be sure that all of the connections
24. il Initially add 16 oz of the oil recommended by the Engine Manufacturer Wait one minute for the oil to settle Figure 5 Oil Fill Dipstick 3 Replace the Dipstick but DO NOT screw it in to ensure an accurate reading and then remove it to check the oil level clean the Dipstick with the rag after checking 4 Continue adding a few ounces of oil at a time rechecking the Dipstick until the oil reaches the fill mark Be careful not to overfill 5 Replace the Dipstick and screw all the way down when full CONTACT US AT www DRpower com 9 DR STUMP GRINDER eii 6 Remove the Gas Fill Cap and fill the Gas Tank with fresh unleaded gas with a minimum of 85 Octane to approximately 1 to 1 1 2 below the top of the fill neck to allow for fuel expansion Figure 6 Be careful not to overfill and reinstall the Gas Fill Cap before starting the engine See your Engine Owner s Manual for more detailed information NOTE To refill the gas tank turn the engine OFF and let the engine cool at least five minutes before removing the gas fill cap WARNING Remove any blocking used to level the Engine before operating the DR Stump Grinder Check the Tire Pressure Tools Needed e Tire Pressure Gauge e Air Compressor 1 Remove the Valve Stem Protective Cap Figure 7 and check the tire pressure with a Tire Pressure Gauge 2 Compare the tire pressure reading from step 1 with the manufacturer s recommended tire press
25. istory and is located on the upper left portion of your packing slip For your convenience and ready reference enter the Serial Number and Order Number in the space provided on the front cover of this manual Additional Information and Potential Changes DR Power Equipment reserves the right to discontinue change and improve its products at any time without notice or obligation to the purchaser The descriptions and specifications contained in this manual were in effect at printing Equipment described within this manual may be optional Some illustrations may not be applicable to your machine 2 DR STUMP GRINDER Chapter 1 General Safety Rules A WARNING Read this safety amp operating Instructions manual before you use the DR STUMP GRINDER Become familiar with the operation and service recommendations to ensure the best performance from your machine If you have any questions or need assistance please contact us at www DRpower com or call toll free 1 800 DR OWNER 376 9637 and one of our Technical Support Representatives will be happy to help you Labels Your DR STUMP GRINDER carries prominent labels as reminders for its proper and safe use Shown below are copies of all the Safety and Information labels that appear on the equipment Take a moment to study them and make a note of their location on your STUMP GRINDER as you set up and before you operate the unit Replace damaged or missing safety and information labels imm
26. m around the Cutting Head Pulley Reverse the previous steps to install the new Belt and reinstall the Belt Guard NOTE When installing the Belt onto the Clutch Pulley Start the Belt onto the bottom of the Pulley and rotate the Cutting Head forward as you guide the Belt up over the top of the Pulley Oil Fill Dipstick Figure 17 Bolt Lock Washer and Flat Washer Bolt Flat Washers and Locknut Figure 18 Figure 19 CONTACT US AT www DRpower com 15 Washer Figure 20 Tooth Threads Locknut Figure 21 Locknut Figure 22 Flat Area on Mount Flat Area on Tooth 3 places Figure 23 16 DR STUMP GRINDER Replacing the Wheels Tools and Supplies needed e 1 2 Wrench e Jack Stand or Block With the Stump Grinder on the ground remove the Bolt Lock Washer and Large Flat Washer from the Axle with a 1 2 Wrench Figure 20 2 Block the Stump Grinder up so the Wheels are off the ground and remove the Wheel NOTE The Wheel on the right hand side has a Bushing in each end of the Wheel Hub make sure the Bushings are in place when installing the Wheel The left hand Wheel has a Keyway built in with a key to hold it from spinning when the Brake is applied make sure the Key is installed in the slot when installing the Wheel 3 Reinstall the Wheel and secure with the Bolt Lock Washer and large Flat Washer using a 1 2 Wrench Rotating the Teeth from dull to sharp ed
27. m the tooth threads Figure 24 3 Lightly tap on the top of the Tooth Threads with a Dead blow Hammer to remove the Tooth from the Tooth Mount Tooth Note In the next step make sure that the flat spot on the mount and one of the flat Figure 24 spots on the Tooth are aligned properly before tightening the Tooth hardware Ensure that the Spacer Stays in position at the Locknut end of the Tooth 4 Insert a new Tooth into the Mount and hold it up into position in the Mount as you secure with a new Locknut Torque the Locknut to 20 ft Ibs 5 Repeat steps 2 through 4 for the remaining Teeth as needed CAUTION Check wear of the Head Assembly each time the Teeth are replaced Replace the Head Assembly if it is damaged or worn Ensure that all parts are secure and tight Large Allen Head Bolts should be at 180 ft Ibs torque Be sure to use the new Locknuts provided with the replacement teeth Failure to replace the Head Assembly when damaged or worn may result in Cutting Teeth coming loose and damaging the machine The Locknuts should be snug but do not over tighten CONTACT US www DRpower com 17 Dead Blow Hammer Figure 25 Brake Hub Bolt Lock Washer and Flat Washer Figure 26 Handlebar Bottom Bolt Flat Figure 27 Washers and Locknut Replacing the Clutch Tools and Supplies needed e 1 2 Wrench 6HP 5 8 Wrench 9HP Never Seize type Grease Dead Blow Hammer Place 1 2 Wrench 6
28. nd bolts tight and keep the equipment in good operating condition A Note to All Users Under California law and the laws of some other states you are not permitted to operate an internal combustion engine using hydrocarbon fuels without an engine spark arrester This also applies to operation on US Forest Lands All DR STUMP GRINDERS shipped to California New Mexico and Washington State are provided with spark arresters Failure of the owner or operator to maintain this equipment in compliance with state regulations is a misdemeanor under California law and may be in violation of other state and or federal regulations Contact your State Park Association or the appropriate state organization for specific information in your area No list of warnings and cautions can be all inclusive If situations occur that are not covered by this manual the operator must apply common sense and operate this DR STUMP GRINDER in a safe manner Contact us at www DRpower com or call 1 800 DR OWNER 376 9637 for assistance CONTACT US AT www DRpower com 5 Chapter 2 Setting Up The DR STUMP GRINDER It may be helpful to familiarize yourself with the controls and features of your DR STUMP GRINDER as shown in Figure 1 before beginning these procedures If you have any questions at all please feel free to contact us at www DRpower com DR STUMP GRINDER Controls and Features Manual Start Operator Brake Lever Presence Lever Maintenance Met
29. ower com 23 M Chapter 6 Parts Lists and Schematic Diagrams Parts List HANDLEBAR ASSEMBLY NOTE Part numbers listed are available through DR Power Equipment Ref Part Description 01 27173 02 13443 03 11076 04 26519 05 17929 06 18069 07 16518 08 16495 09 16496 10 26480 11 11163 12 26529 13 15043 14 11241 15 24729 16 11075 17 15712 18 11214 24 Cross Member Handlebar w Labels Bolt 5 16 18 x 1 1 2 Nut Nylon Lock 5 16 18 Label Control Panel Front Plug Control Panel With Cutout Lever Op Presence w Wire Lever Brake w Lock Grip Ergonomic 1 Grip 1 Throttle Screw 10 x 1 1 2 Type Handlebar Right w Label Bolt Hhcs 3 8 16 x 1 1 4 Gr5 Washer Flat 5 16 USS Handlebar Left Nut Nylon Lock 3 8 16 Bolt HCS 3 8 16 x 2 1 4 Full Thread Cable Tie 7 1 2 DR STUMP GRINDER Ref Part Description 19 26479 20 17912 21 26476 22 11158 23 11238 24 27172 25 26488 26 23494 27 23545 28 26478 29 15345 30 21720 31 26504 32 19320 33 23548 34 28701 35 28702 Bracket Brake Cable Bolt Tri Lobe 1 4 20 x 1 2 Guard Debris Bolt HCS 5 16 18 x 1 Gr 5 ZP Washer Flat 1 4 USS Frame w Labels Label Head Rotation Label DR Logo 6 Round Label CHP Address Cable Brake Label Throttle Control Meter Hour RPM Maintenance Switch Start Label Start Keys Screw M4 x 8mm Washer Lock M4 Schematic HANDLEBAR ASSEMBLY 52 30 PART O
30. stance resistance Cutting Head Rotary 8 Tooth Rotary 8 Tooth Rotary 8 Tooth Cutting Head Size 1 75 Wide kerf X 10 5 1 75 Wide kerf X 10 5 1 75 Wide kerf X 10 5 w Teeth Diameter Diameter Diameter Cutting Teeth Replaceable Carbide Tipped Replaceable Carbide Tipped Replaceable Carbide Tipped three position three position three position Machine Dimensions 28 Wx 51 Lx 36 28 W x 51 Lx 36 28 W x 51 Lx 36 center center Handlebar sedition center Handlebar position Handlebar position Operating Weight 166 Ibs Shipping Weight Shipping Dimensions 54 75 Lx 35 5 W x 45 25 H 54 75 Lx 35 5 W x 45 25 H 54 75 Lx 35 5 W x 45 25 H Unpacking the DR STUMP GRINDER Tools and supplies Needed e Wire Cutters Utility Knife Needle Nose Pliers Safety Glasses CAUTION CAUTION The Straps and Cable Ties may be under tension Wear Safety Glasses when cutting the Straps and Cable Ties to protect your eyes 1 Cut the two Straps securing the Box Cover and remove the Cover Figure 2 Figure 2 8 DR STUMP GRINDER 2 Pull the seams at the ends of the apart you may need Needle Nose Safety and Operating Box Instructions Manual Seams Pliers to loosen the staples and lay the sides down Figure 3 3 Remove the Product Package Safety and Operating Instructions manual and Engine manual from the Control Panel by cutting the tape with a Utility Knife 4 Cut all
31. t towards the run position Wait until the engine runs smoothly before each Choke adjustment 5 When the Engine is warmed up and running smoothly ensure that the Choke is fully in the run position to the right Stopping the Engine Figure 12 1 Slowly release the Throttle Control Lever to the idle position Figure 9 2 Release the Operator Presence lever to stop the Engine 3 Turn the Ignition Switch to the Off position Figure 10 for 6HP Manual Start and to the left Figure 12 for 9HP Electric Start Before You Begin e Dig away the earth and remove any stones near the tree stump that may interfere with your work e Check that the ground is free of foreign objects such as electrical cables barbed wire etc e Cut the stump as close to the ground as possible using a Chainsaw before using the Stump Grinder 12 DR STUMP GRINDER Grinding Stumps These grinding instructions are basic guidelines Try different techniques in direction and depth of cut to determine what works best for your situation WARNING Read and understand the warnings listed in Chapter 2 General Safety Rules before operating this Stump Grinder 1 Start the Engine as described in the Starting the Engine section on page Side 11 E 2 Allow engine to warm at idle for a few minutes ek Move the Stump Grinder into position with the Cutter Head at the right side Figure 13 of the stump on the edge
32. ture when not using your DR STUMP GRINDER e Ifthe Battery does not hold its charge for very long under normal conditions or it simply won t hold a charge then replace it You can purchase replacement Batteries directly from us To install your new Battery follow the directions on the next page 20 DR STUMP GRINDER Replacing the Battery Tools Needed e Two 7 16 Wrenches 1 Disconnect the Battery Terminals Figure 30 2 Remove the Bolts and Locknuts that secure the Battery Clamp using two 7 16 Wrenches 3 Remove the Clamp and the dead Battery 4 Install the new Battery Terminals 5 Install the Battery Clamp and secure with the Bolts and Locknuts using two Battery 7 16 Wrenches Bolts Locknuts 6 Attach the Battery Terminals Black Wire to negative black Terminal and Red Figure 30 Wire to positive red Terminal Disposing of the Battery Responsibly Electric Start Models The Battery is a sealed lead acid Battery Recycle or dispose of it in an environmentally sound way e Do not dispose of a lead acid Battery in a fire the Battery may explode or leak e Do not dispose of a lead acid Battery in your regular household trash Law in most areas prohibits incinerating disposing in a landfill or mixing a sealed lead acid Battery with household trash Recycling a Used Battery Please dispose of your used Batteries responsibly by recycling them Call your local Solid Waste Man
33. ual for detailed information If the Engine still smokes visit our website at www DRpower com The Engine runs well but The Throttle should be fully pressed to engage Clutch the Cutting Head won t The Cutter Head Drive Belt is off the pulleys or broken Reinstall or change Belt refer to ne Chapter 4 Maintaining the DR Stump Grinder Confirm there is nothing wedged wrapped around cutter head or Pulleys Confirm the throttle is moving on the engine Confirm that Belt has not stretched to a point that it is slipping off the Pulleys Clutch is not working Change Clutch refer to Chapter 4 Maintaining the DR Stump Grinder The Engine does not Throttle linkage is sticking Adjust throttle linkage refer to Chapter 4 Maintaining the DR fully return to low idle Stump Grinder when the throttle is released The Cutting Head is The teeth are dull or damaged Replace Teeth refer to Chapter 4 Maintaining the DR Stump rotating but the cutting Grinder action is extremely slow and the stump is showing signs of excessive heat Belt falls off Pulleys Check Pulleys and Belt for damage frequently Check tightness of Idler Arm Pivot Bolt Left side Wheel turns Brake Cable needs adjusting Adjust Cable as needed refer to Chapter 4 Maintaining the DR forward when Brake Stump Grinder Lever is locked or machine is difficult to push when Brake Lever is released CONTACT US AT WWW DRp
34. ure stamped on the side of the tire 3 Ifthe pressure is too low add air through the Valve Stem with an air hose WARNING Do not over inflate the tires Inflate to the manufacturers recommended pressure found on the tires 4 Replace the Valve Stem Protective Cap when finished Connect the Battery NOTE The Battery may have been shipped with a protective Cap over the negative Terminal and the Cap will need to be removed to connect the Negative Wire 1 Connect the Black Negative Terminal onto the negative Battery Lug Figure 8 Chapter 3 Operating The DR STUMP GRINDER It may be helpful to better familiarize yourself with the features of your Stump Operator Presence Grinder by reviewing Figure 1 in Chapter 2 before beginning the steps outlined Lever in this chapter WARNING WARNING Read and understand the warnings listed in Chapter 2 General Safety Rules before operating this Stump Grinder Brake Throttle ever Control Levers sabad IE Figure 9 1 Familiarize yourself with all of the Control Levers and their functions before operating the Stump Grinder Figure 9 Starting the Engine Manual Start Ignition Switch 1 Turn the Ignition Switch to the ON position Figure 10 6HP only T 2 Make sure the Fuel Shut off is in the OPEN position Figure 11 MET 3 Move the Choke Control Lever to the left to the choke position leave in the e 4 run position to the
35. urely fastened e Inspect moving parts and the Drive Belt for damage and wear replace if necessary e Remove the Spark Plug s and pour about 1 ounce of motor oil into the Cylinder hole Replace the Plug s and crank the Engine over a couple of times using the Pull Cord or the Electric Starter for Electric Start Machines This will coat the piston and seat the valves to prevent moisture buildup e If possible store the Stump Grinder a dry protected place If it is necessary to store the Stump Grinder outside cover it with a protective material especially the Engine For Electric Start Model store the machine in a dry environment with temperatures between 40 degree symbol F 5C and 95F 35 Make sure the storage temperatures will never be outside of these limits The lower the storage temperature is within the specified temperature the better as the battery will discharge more slowly at low temperatures If it is necessary to store the Stump Grinder outside make sure to disconnect the battery and store it in an environment as listed above Make sure the disconnected battery terminals are not resting on any surface that may be prone to collecting water snow or any other liquid as this may cause damage to the terminals and to the battery when reconnected 75 MEIGS ROAD BOX 25 VERGENNES VERMONT 05491 2012 Country Home Products Inc All rights reserved 310641
36. utdoors with the engine off and allow the engine to cool completely Don t handle gasoline if you or anyone nearby is smoking or if you re near anything that could cause it to ignite or explode Reinstall the fuel tank Cap and fuel container cap securely e spill gasoline do not attempt to start the engine Move the machine away from the area of the spill and avoid creating any source of ignition until the gas vapors have dissipated Wipe up any spilled fuel to prevent a fire hazard and properly dispose of the waste e Allow the engine to cool completely before storing in any enclosure Never store a machine that has gas in the tank or a fuel container near an open flame or spark such as a water heater space heater clothes dryer or furnace e Never make adjustments or repairs with the engine running Shut down the engine disconnect the spark plug wire keeping it away from the spark plug to prevent accidental starting wait 5 minutes before making adjustments or repairs e Never tamper with the engine s governor setting The governor controls the maximum safe operation speed and protects the engine Over speeding the engine is dangerous and will cause damage to the engine and to the other moving parts of the machine If required see your authorized dealer for engine governor adjustments e Keep combustible substances away from the engine when it is hot e Never cover the machine while the muffler is still hot e Do not operate the engin
37. warranty Allow only one person to operate the Stump Grinder at any time e ifthe machine should start making an unusual noise or vibration shut down the engine disconnect the spark plug wire keeping it away from the spark plug to prevent accidental starting wait 5 minutes then inspect for damage Vibration is generally a warning of trouble Check for damaged parts and clean repair and or replace as necessary e Never tamper with safety devices Check their proper operation regularly e Before performing any maintenance or inspection procedure on the Stump Grinder release the throttle lever first and then release the operator presence lever turn the ignition switch to off remove the spark plug wire and keep it away from the spark plug e Never allow people who are unfamiliar with these instructions to use the Stump Grinder Allow only responsible individuals who are familiar with these rules of safe operation to use your machine e Never overload or attempt to grind material beyond the manufacturer s recommendation Personal injury or damage to the machine could result e While using the Stump Grinder don t hurry or take things for granted When in doubt about the equipment or your surroundings stop the machine and take the time to look things over e Never operate the machine when under the influence of alcohol drugs or medication e Use machine only in daylight Stay alert for hidden hazards or traffic Keep all nuts a
38. when swept across the stump it will remove 1 2 to 1 of stump with each sweep 8 Sweep the Cutter Head across the stump cutting away 1 2 to 1 of stump 9 Continue cutting and advancing until the top level of stump is all removed making sure not to cut the stump deeper than ground level during this first stage 10 Release the Throttle Lever and then the Operator Presence Lever to stop the Engine and wait ten seconds for Cutter Head to stop rotating 11 Release the Brake so you can pull the machine away from the stump and remove the chips debris and any dirt away from the stump 12 Repeat steps 1 through 11 until the stump is removed to the desired depth CONTACT US www DRpower com 13 Chapter 4 Maintaining The DR STUMP GRINDER Regular maintenance is the way to ensure the best performance and long life of your machine Please refer to this manual and the engine manufacturer s owner s manual for maintenance procedures Service intervals listed in the checklist below supersede those listed in the engine manufacturer s owner s manual WARNING WARNING Before performing any maintenance procedure or inspection stop the engine wait five 5 minutes to allow all parts to cool Disconnect the spark plug wire keeping it away from the spark plug Disconnect the Battery Terminals Electric start only Regular Maintenance Checklist PROCEDURE BEFORE EVERY 25 EVERY 60 EVERY 100 EACH USE HOURS HOURS HOURS Check Engine Oil Level
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