DR 9 HP Pro User Manual
`
DR
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.
CONTACT US AT www.DRpower.com 3
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.
CONTACT US AT www.DRpower.com 5
®
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
CONTACT US AT www.DRpower.com 7
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
®
DR
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.
CONTACT US AT www.DRpower.com 9
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).
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