DR 9 HP Pro User Manual

Download

SAFETY & OPERATING INSTRUCTIONS

STUMP GRINDER

DR Power Equipment

Serial No.

Order No.

Read and understand this manual and all instructions before operating the DR STUMP GRINDER.

Original Language

Toll-free phone: 1-800-DR-OWNER (376-9637) Fax: 1-802-877-1213 Website: www.DRpower.com

Table of Contents

Chapter 1: General Safety Rules............................................................................................................................................................ 3

Chapter 2: Setting Up The DR STUMP GRINDER ............................................................................................................................... 6

Chapter 3: Operating The DR STUMP GRINDER................................................................................................................................ 11

Chapter 4: Maintaining The DR STUMP GRINDER............................................................................................................................. 14

Chapter 5: Troubleshooting.................................................................................................................................................................. 22

Chapter 6: Parts Lists, Schematic Diagrams And Warranty ................................................................................................................ 24

Conventions used in this manual

This indicates a hazardous situation, which, if not avoided, could result in death or serious injury.

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 history 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

Read this safety & 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 immediately.

#235451

#257091

#137581

153451

193201

#264881

#188871

Protecting Yourself and Those Around You

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:

 Keep in mind that the operator or user is responsible for accidents or hazards occurring to other people, their property, and

themselves.

 Always wear protective goggles or safety glasses with side shields while using the STUMP GRINDER to protect your eyes from

possible thrown debris.

 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.

 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.

 Wear long pants while operating the STUMP GRINDER.  Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing.  Keep bystanders at least 50 feet away from your work area at all times. Stop the engine when another person or pet

approaches.

Safety for Children and Pets

Tragic accidents can occur if the operator is not alert to the presence of children and pets. Children are often attracted to the

Never

machine and the grinding activity. precautions:

assume that children will remain where you last saw them. Always follow these

 Keep children and pets at least 50 feet from the working area and ensure they are under the watchful care of a responsible

adult.

 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

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:

 Never run the engine in 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.

 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.

 Replace rubber fuel lines and grommets when worn or damaged and after 5 years of use.  Fill the gasoline tank outdoors 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.

 If you 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.

 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.

 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.

 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.

 Keep combustible substances away from the engine when it is hot.  Never cover the machine while the muffler is still hot.  Do not operate the engine 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.

 The muffler and engine become very hot and can cause a severe burn; do not touch.

4 DR

STUMP GRINDER

General Safety

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:

 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.

 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.

 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 warranty.

 Allow only one person to operate the Stump Grinder at any time.  If the 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.

 Never tamper with safety devices. Check their proper operation regularly.  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.

 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.

 Never overload or attempt to grind material beyond the manufacturer’s recommendation. Personal injury or damage to the

machine could result.

 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.

 Never operate the machine when under the influence of alcohol, drugs, or medication.  Use the machine only in daylight.  Stay alert for hidden hazards or traffic.  Keep all nuts and 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 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 1-800DR-OWNER (376-9637) for assistance.

STUMP

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

Maintenance Meter

Throttle Lever

Presence Lever

Gas Fill

Choke Lever

Fuel Shut-off

Starter Cord

Pneumatic Tires

Oil Fill

Belt Guard

“On” “Off” Ignition Switch (6HP) (This Switch is Disconnected on 9HP Manual Start Models and not Needed for Starting)

Carbide Teeth

Figure 1a

6 DR

STUMP GRINDER

DR STUMP GRINDER Controls and Features (Electric Start)

Operator Presence Lever

Brake Lever

“Start” Key Switch

Battery

Maintenance Meter

Throttle Lever

Oil Fill

REAR VIEW

Gas Fill

Choke Lever

Fuel Shut-off

Starter Cord

Pneumatic Tires

Figure 1b

Belt Guard

Carbide Teeth

Specifications

Engine

Tire Size Handle Bars

Brake Diameter Clutch Engagement speed Frame

Belt Size Construction

Cutting Head Cutting Head Size

(w/Teeth)

Cutting Teeth

Machine Dimensions

Operating Weight Shipping Weight Shipping Dimensions

6HP Subaru Manual-Start 9HP Subaru Manual-Start 9HP Subaru Electric-Start Please refer to the Engine

Owner’s Manual for Enginespecifications.

14.5" Pneumatic 14.5" Pneumatic 14.5" Pneumatic Height adjustable to 32", 36.5"

and 40" (w/tools)

Band w/ locking feature 4" Centrifugal 1900 RPMs Welded 12 ga steel

construction

V-Belt AP47: 49.3" OD, 47.3" ID Wrapped for abrasion

resistance

Rotary 9 Tooth

1.3" Wide (kerf) X 10.5" Diameter

Replaceable Tungsten Carbide Tipped (three position)

28" W x 51" L x 36" H* *center Handlebar position

127 lbs 192 lbs.

54.75" L x 35.5" W x 45.25" H

Please refer to the Engine Owner’s Manual for Enginespecifications.

Height adjustable to 32", 36.5" and 40" (w/tools)

Band w/ locking feature 4" Centrifugal 1900 RPMs Welded 12 ga. steel

construction

V-Belt BP47: 49.8" OD, 47.3" ID Wrapped for abrasion

resistance

Rotary 9 Tooth

1.3" Wide (kerf) X 10.5" Diameter

Replaceable Tungsten Carbide Tipped (three position)

28" W x 51" L x 36" H* *center Handlebar position 139 lbs

204 lbs.

54.75" L x 35.5" W x 45.25" H

Please refer to the Engine Owner’s Manual for Enginespecifications.

Height adjustable to 32", 36.5" and 40" (w/tools)

Band w/ locking feature 4" Centrifugal 1900 RPMs Welded 12 ga. steel

construction

V-Belt BP47: 49.8" OD, 47.3" ID Wrapped for abrasion

resistance

Rotary 9 Tooth

1.3" Wide (kerf) X 10.5" Diameter

Replaceable Tungsten Carbide Tipped (three position)

28" W x 51" L x 36" H* - *center Handlebar position

160 lbs 225 lbs.

54.75" L x 35.5" W x 45.25" H

Box Cover

Figure 2

8 DR

Straps

STUMP GRINDER

Unpacking the DR STUMP GRINDER

Tools and supplies Needed:

 Wire Cutters  Utility Knife  Needle Nose Pliers  Safety Glasses

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).

2. Pull the seams at the ends of the Box apart (you may need Needle Nose

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 Plastic Straps that are securing the Stump Grinder to the Pallet,

unlock the Brake by pressing 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

STUMP GRINDER.

Safety and Operating Instructions Manual

Box Seams

Adding Oil and Gasoline

Engine Oil

Fuel

 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 checking the level frequently to avoid overfilling.

 To get an accurate reading when checking the oil level:

- The Engine must be level.

- The dipstick should not 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.

SAE 30: above 50 degrees F; 10w-30: 10-90 degrees F; 5w-30: 30 degrees F or below

Unleaded gasoline

. Fill the reservoir slowly,

be screwed down to ensure an accurate oil

Figure 3

Figure 4

Cable Ties

Full

Low

The Frame and Engine must be level to get an 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 oil. 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.

Gas Fill Cap

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.

Figure 6

Valve Stem Protective Cap

Figure 7

Remove any blocking used to level the Engine before operating the DR Stump Grinder.

Check the Tire Pressure

Tools Needed:

 Tire Pressure Gauge  Air Compressor

1. Remove the Valve Stem Protective Cap (Figure 7) and check the tire pressure

with a Tire Pressure Gauge.

2. Check what the manufacturers recommended pressure is that is stamped on

the side of the Tire.

3. If the pressure is too low, add air through the Valve Stem with an air hose.

4. Replace the Valve Stem Protective Cap when finished.

Do not over inflate the tires. Inflate to the manufacturers recommended pressure found on the tires.

Connect the Battery

Figure 8

10 DR

Battery

STUMP GRINDER

Negative Terminal

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 Grinder by reviewing Figure 1 in Chapter 2 before beginning the steps outlined in this chapter.

Read and understand the warnings listed in “Chapter 2 General Safety Rules” before operating this Stump Grinder.

Control Levers

1. Familiarize yourself with all of the Control Levers and their functions before

operating the Stump Grinder (Figure 9).

Starting the Engine (Manual Start)

2. Turn the Ignition Switch to the “ON” position (Figure 10) (6HP only).

3. Make sure the Fuel Shut-off is in the “OPEN” position (Figure 11).

4. 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.

Operator Presence Lever

Brake Lever

Figure 9

Ignition Switch

Throttle Lever

Off

5. 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.

6. 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.

7. 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 10

Choke Lever

Fuel Shut-off

Figure 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 right 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

 Dig away the earth and remove any stones near the tree stump that may

interfere with your work.

 Check that the ground is free of foreign objects, such as electrical cables,

barbed wire, etc.

 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.

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 the

previous page.

2. Allow engine to warm up at idle for a few minutes.

3. Move the Stump Grinder into position with the Cutter Head at the right side

of the stump on the edge 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.

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.

Brake Leve

Start at Right-Hand Side of Stump

Figure 13

5. Hold down the Throttle Lever on the right side Handlebar (this will engage

the Cutter Head Rotation). Let the Cutter Head come up to speed.

Figure 14

6. 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

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.

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.

Figure 15

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 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.

Chapter 4: Maintaining The DR STUMP GRINDER

)

Rep

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.

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

EACH USE

Check Engine Oil Level Check General Equipment Condition Check Cutting Teeth (are they dull or damaged) Clean Engine Exterior & Cooling Fins Remove debris wrapped around Cutter Head for Bearing protection.

Check Tire Pressure 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 Check Cutter Head when Teeth are replaced

lace Cutter Head (order kit # 271621) lace Spark Plug

Replace Air Filter

time 5

hours

    

VERY 25

HOURS

    

 

VERY 60

HOURS

Removing and Replacing the Engine Oil

Tools and Supplies Needed:

 14mm Wrench  1/2" Wrench (electric start only)  Rags and approved Container (for waste oil)  Small funnel  Engine Oil (see your Engine Manual for Oil specifications)

VERY 100

HOURS



 

Figure 16

14 DR

Battery Bracket

STUMP GRINDER

Battery Terminals

Locknuts inside Frame

The Frame and Engine must be level to get an accurate reading when adjusting the oil level. Use blocks to adjust the height of the cutting head to level the Frame.

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).

2. Position the machine so the Frame and Engine are level and place a Waste

Oil Container under the Oil Drain Plug (Figure 17).

3. Remove the Oil Drain Plug with a 14mm Wrench and 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 SAE 30 High Detergent 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:

 Two 1/2" Wrenches  9/16" Wrench  New DR Drive Belt (see chapter 6 for part numbers)  Gloves

1. Remove the Bolt, Lock Washer and Flat Washer from the rear of the Belt

Guard with a 1/2" Wrench (Figure 18).

2. 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.

Figure 17

Bolt, Flat Washers and Locknut

Figure 18

Bolt, Lock Washer and Flat Washer

Full

Oil Drain Plug

Oil Fill/Dipstick

Low

3. You should wear Gloves as you position a 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.

4. 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 (Figure 19). Remove the Belt from around the Cutting Head Pulley (Figure 20).

5. 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.

Figure 19

Figure 20

Idler Pulley

Belt

Clutch Pulley

Belt

Cutting Head Pulley

Tire

Figure 21

Bolt and Washer

Replacing the Wheels

Tools and Supplies needed:

 1/2" Wrench

1. 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 21).

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.

16 DR

STUMP GRINDER

Replacing the Cutting Teeth

Tools and Supplies needed:

 Two 7/16" Wrenches  Gloves

CAUTION! Wear Gloves when working near the teeth. Without Gloves your hands could suffer cuts from the sharp Teeth.

1. Block the front end of the Stump Grinder so the Cutter Head is just off the

ground.

2. Remove the nine Bolts and Locknuts from the Cutter Head with two 7/16"

Wrenches (Figure 22).

3. Move the Side Plates away from the Cutter Head Base to gain access to the

Teeth (Figure 23).

4. Remove a Cutter Tooth by sliding the Tooth to the side and pulling it away

from the Cutter Head. Install a new Cutter Tooth that is the same as the one you removed (straight, left bend or right bend).

5. Continue removing and adding Teeth until they all are replaced.

NOTE: The Teeth must be installed in the correct order - straight Tooth, left bend

Tooth and then right bend Tooth, straight, left bend and then right bend etc.

6. When all the Cutter Teeth are in place, slide the Side Plates back against the

Cutter Head.

7. Secure the Teeth by fastening the Side Plates to the Cutter Head the new

nine Bolts and Locknuts that came with your Cutting Teeth Kit.

CAUTION! Check wear of the Head Assembly each time the Teeth are replaced.

Replace the Head Assembly if it is damaged or worn.

Bolt and Locknut

Figure 22

Bolt Hole

Tooth Slot

Right Bend Tooth

Cutter Head Base

Be sure to use the new Bolts and 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.

Replacement Teeth Mounting Bolts must pass through the slot in the Teeth. Some Head Assemblies may have additional holes in between the Teeth that are not used.

Do not over tighten the Bolts. They should be snug, about 100 inchpounds (8 foot-pounds). If Bolts are over tightened they may crack or break.

The Teeth should fit securely and when pulled out straight towards the front of the machine (not rocking side to side) should not move more than 1/32". If it moves more than 1/32" the Cutter Head Tooth Key is worn and the Cutter Head should be replaced.

Left Bend Tooth

Side Plate

Figure 23

Side Plate

Straight Tooth

Dead Blow Hammer

Figure 24

Clutch

Brake Hub

Replacing the Clutch

Tools and Supplies needed:

 1/2" Wrench (6HP)  5/8" Wrench (9HP)  Dead Blow Hammer

1. Place a 1/2" Wrench (6HP) or 5/8" Wrench (9HP) onto the Clutch Bolt and

rotate the Wrench counterclockwise until you feel some resistance (Figure

24).

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 from the

Engine Shaft.

4. Apply a never seize type grease to the Engine Shaft and install the new

Clutch (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 (9HP).

Lubricate Cables

Supplies needed:

 SAE 30 Oil

1. Lubricate the 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:

Bolt, Lock Washer and Flat Washer

Figure 25

Handlebar

Bottom Bolt, Flat Washers and Locknut

Figure 26

When the Handlebars are adjusted to the highest setting, you should change the position of the Exhaust Deflector so it is oriented 45º downward to the left so it is not pointing directly at the Handlebar. The paint may be damaged if the Deflector is not rotated.

 Two 9/16" Wrenches  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 25).

3. Remove the bottom Bolt, Flat Washers and Locknuts from both Handlebars

with two 9/16" Wrenches and just loosen the upper Hardware (Figure 26).

4. Rotate the Handlebars forward to 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.

18 DR

STUMP GRINDER

Adjusting The Brake

Tools and supplies needed:

Brake Cable

 1/2" Wrench  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.

Tightening the Brake Cable (if the Brake does not hold the Wheel in place)

Loosen the lower nut a few turns so it moves away from the Bracket (Figure

27).

Adjusting Nuts

Spring

Figure 27

Bracket

2. As you rotate the Wheel forward (with Wheel Lever unlocked), tighten the upper Nut until you feel a slight resistance at the

Wheel.

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: 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)

6. 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 27).

7. Tighten the lower Nut up against the Bracket.

8. Lower the Stump Grinder to the ground and test the Brake and pivoting (side

to side) action.

9. If the left-side Wheel holds when the Brake is applied, but the machine is

hard to push ahead when the Brake is released, the Cable needs more loosening. Repeat steps above as needed.

Loosen 1/4 Turn

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 may need adjustment.

Tools needed:

 10mm Socket  Ratchet and Extension

1. Loosen the Throttle Pivot Nut 1/4 turn counterclockwise and test the

Throttle Lever (Figure 28). 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 needed.

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 assistance.

Figure 28

Throttle Pivot Nut

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:

 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.

 Store an unused Battery in a dry environment with temperatures between +40°F (+5°C) 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.

 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.

 Do not continue to crank your Engine when the Battery charge is low.

Charging the Battery

When you are finished charging the battery, disconnect the 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.

 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.

2. 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.

3. Plug the Charger into a standard wall outlet.

 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 temperature when not using your DR STUMP GRINDER.

 If the 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:

 Two 7/16" Wrenches

1. Disconnect the Battery Terminals (Figure 29).

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.

5. Install the Battery Clamp and secure with the Bolts and Locknuts using two

7/16" Wrenches.

6. Attach the Battery Terminals. Black Wire to negative black Terminal and Red

Wire to positive red Terminal.

Bolts and Locknut

Figure 29

Battery Terminals

Battery Clamp

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.

 Do not dispose of a lead-acid Battery in a fire; the Battery may explode or leak.  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 Management 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]. Once there, click the Municipal HHW link under Hazardous Household Waste, and enter your zip code. The site lists recycling centers located near you.

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 PO Box 720 245 Portersville Road Ellwood City, PA 16117 (724) 758-2825; 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].

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.

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

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 smoothly.

(Please refer to the Engine Owner’s Manual for engine-specific procedures.)

 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 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.

22 DR

STUMP GRINDER

Troubleshooting Table (Continued)

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.

The Engine runs well but the Cutting Head won’t move.

The Engine does not fully return to low idle when the throttle is released.

 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 Manual for detailed

information.

 If the Engine still smokes, visit our website at www.DRpower.com.  The Throttle should be fully pressed to engage Clutch.

 The Cutter Head Drive Belt is off the pulleys or broken. Reinstall or change Belt (refer to

“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”).

 Throttle linkage is sticking. Adjust throttle linkage (refer to “Chapter 4: Maintaining the DR

Stump Grinder”)

The Cutting Head is rotating but the cutting action is extremely slow and the stump is showing signs of excessive heat.

Belt falls off Pulleys frequently.

Left-side Wheel turns forward when Brake Lever is locked or machine is difficult to push when Brake Lever is released.

 The teeth are dull or damaged. Replace Teeth (refer to “Chapter 4: Maintaining the DR Stump

Grinder”).

 Check Pulleys and Belt for damage.  Check tightness of Idler Arm Pivot Bolt.

 Brake Cable needs adjusting. Adjust Cable as needed (refer to “Chapter 4: Maintaining the DR

Stump Grinder”).

Chapter 6: Parts Lists, Schematic Diagrams And Warranty

Parts List - HANDLEBAR ASSEMBLY

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part# Description

01 271731 Cross Member, Handlebar, w/Labels 02 134431 Bolt, 5/16-18 x 1-1/2" 03 110761 Nut Nylon Lock 5/16-18 04 265191 Label, Control Panel Front 05 179291 Plug, Control Panel, With Cutout 06 180691 Lever, Op Presence, w/ Wire 07 165181 Lever, Brake, w/ Lock 08 164951 Grip, Ergonomic, 1" 09 164961 Grip, 1" 10 264801 Throttle 11 111631 Screw, #10 x 1-1/2", Type A 12 265291 Handlebar, Right, w/Label 13 150431 Bolt, Hhcs, 3/8-16 x 1-1/4", Gr5 14 112411 Washer, Flat, 5/16", Uss 15 247291 Handlebar, Left 16 110751 Nut, Nylon Lock, 3/8-16 17 157121 Bolt, Hcs, 3/8-16 x 2-1/4", Full Thread 18 112141 Cable Tie, 7 1/2"

Ref# Part# Description

19 264791 Bracket, Brake Cable 20 179121 Bolt, Tri-Lobe, 1/4-20 x 1/2" 21 264761 Guard, Debris 22 111581 Bolt, Hcs, 5/16-18 x 1", Gr 5, Zp 23 112381 Washer, Flat, 1/4", Uss 24 271721 Frame, w/Labels 25 264881 Label, Head Rotation 26 234941 Label, DR Logo, 6" Round 27 235451 Label, CHP Address 28 264781 Cable, Brake 29 153451 Label, Throttle Control 30 217201 Meter, Hour/RPM/Maintenance 31 265041 Switch, Start 32 193201 Label, Start 33 235481 Keys 34 287011 Screw, M4 x 8mm 35 287021 Washer, Lock, M4

24 DR

STUMP GRINDER

Schematic – HANDLEBAR ASSEMBLY

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

01 265311 Engine, Subaru, 6HP, w/Labels 02 134431 Bolt, 5/16-18 x 1-1/2" 03 112381 Washer, Flat 1/4", Uss 04 110761 Nut, Nylon Lock, 5/16-18 05 265201 Clutch, Centrifugal, 3/4" Bore 06 178821 Bolt, Hcs, 5/16-24 x 1" 07 165141 Washer, .385" ID, 1.390" OD, 3/8" TH 08 264681 Belt, Stump Grinder, 6HP 09 265281 Guard, Belt, w/Labels 10 123211 Bolt, Hcs, 5/16-18 x 3/4" 11 112431 Washer, Lock, Split, 5/16" 12 257091 Label, Safety Icons 13 192391 Label, DR Logo, 5-3/4" Silver 14 265661 Arm, Idler Pulley 15 265351 Bolt, Shoulder, 1/2" x 3/4" Long 16 129691 Shim, .75"ID, 1.125"OD, .06"TH, ZP 17 112411 Washer, Flat, 5/16", Uss 18 264821 Deflector, Exhaust 19 180121 Pulley, Flat Idler, 3-1/4" 20 126861 Bolt, Hhcs, 3/8-16 x 2", Gr5 21 164131 Nut, Nylon Lock, 3/8-16, Low Profile 22 188871 Label, Hot Surface

Ref# Part# Description

23 164801 Spring, Ext, 3/4" OD, .085 Wire, 3" L 24 134431 Bolt, 5/16-18 x 1-1/2" 25 110691 Nut, 5/16-18, Zp, Gr2 26 265651 Pulley, 5" Diam, A/B Profile 27 258021 Bearing, Stamped Flange, 1" Bore 28 111581 Bolt, Hcs, 5/16-18 x 1", Gr5, Zp 29 264741 Guard, Pulley 30 264831 Ring, Retaining, 1" Shaft 31 265621 Base, Cutter Head, 2 Key 32 264641 Plate, Side, Cutter Head 33 160861 Bolt, Hhcs, 1/4-20 x 1-3/4", Gr8 34 110731 Nut, Nylon Lock, 1/4-20 35 264671 Tooth, Left 36 264651 Tooth, Straight 37 264661 Tooth, Right 38 142291 Key, Square, 1/4" x 1-1/4" 39 127811 Label, Warning, Check Oil 40 264851 Wire Harness

Not Illustrated

265321 Teeth Kit

26 DR

STUMP GRINDER

Schematic – DRIVE ASSEMBLY (see next page for 9HP specific parts)

Parts List – DRIVE ASSEMBLY (9HP specific parts)

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part# Description

01 271721 Frame, w/Labels 02 265361 Bolt, Serrated Flange, M6-1x16 03 112411 Washer, Flat, 5/16", Uss 04 123341 Bolt, Hhcs, 3/8-16 x 1-3/4", Gr 5, Zp 05 264851 Wire Harness, Manual Start 286901 Wire Harness, Electric Start 06 127811 Label, Warning Add Oil 07 271331 Engine w/Labels, Subaru, 9HP 287031 Engine W/ Label, 13.74 GTQ, Subaru E/S 08 188871 Label, Hot Surface, R/C

Ref# Part# Description

09 265331 Clutch, Centrifugal, 1" Bore 10 265631 Belt, Stump Grinder 9HP 11 271401 Spacer, 1" ID,1.375" OD, .313 Th 12 271641 Washer, .47"Id, 1.4"Od, .15" Th 13 229111 Bolt, Hhcs, 7/16-20 X 1", Gr 8, Locking

Patch 14 110751 Nut Nylon Lock 3/8-16 15 265681 Shim, 1" ID, 1.375" OD x .16 Th

28 DR

STUMP GRINDER

Parts List and Schematic – AXLE ASSEMBLY

NOTE: Part numbers listed are available through DR Power Equipment.

Ref# Part# Description

01 247441 Wheel, 14.5 x 7-6, 2 Ply, Gray 02 178821 Bolt, Hcs, 5/16-24 x 1" 03 112431 Washer, Lock, Split, 5/16" 04 165141 Washer, .385 ID, 1.390 OD, 3/8" Th 05 264691 Bushing, Bronze, .75 OD, .63 ID 06 265641 Axle 07 246771 Key, Square, 3/16" x 1" 08 264861 Brake Drum 09 123211 Bolt, Hcs, 5/16-18 x 3/4" 10 112381 Washer, Flat, 1/4", Uss 11 264731 Brake, Band 12 164131 Nut, Nylon Lock, 3/8-16, Lo Profile 13 123361 Bolt, Hhcs, 5/16-18 x 1-1/4", Gr5, Zp

Ref# Part# Description

14 110761 Nut, Nylon Lock, 5/16-18 15 111261 Ring, Retaining, 3/4", Ext 16 129691 Shim, 3/4" ID, 1-1/8" OD, 1/16" L, Zp 17 264771 Bushing, Flange, 3/4" ID 18 110731 Nut, Nylon Lock, 1/4-20 19 112371 Washer, Flat, #10, Uss 20 119831 Bolt, Hhcs, 1/4-20 x 3/4" L 21 242301 Hold Down, Battery 22 134471 Battery, 9AH 12V 23 143861 Pad, Battery, 1.38" x 7.0" 24 286971 Pad, Battery, 2.5" x 6.125" 25 258621 Bracket, Battery 26 283201 Clamp, Tube, 7/16", Vinyl coated

Notes:

30 DR

STUMP GRINDER

Notes:

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.

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. [ ] 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.

End of Season and Storage

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.

 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.

 Be sure all nuts, bolts, and screws are securely fastened.  Inspect moving parts and the Drive Belt for damage and wear; replace if necessary.

 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.

 If possible, store the Stump Grinder in 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 (+35C). 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, P.O. BOX 25, VERGENNES, VERMONT 05491

DR 9 HP Pro User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual