DR Tow-Behind All Terrain User Manual
DR
SAFETY & OPERATING INSTRUCTIONS
®
7.25 ALL-TERRAIN TRIMMER/MOWER
DR Power Equipment
Serial No.
Order No.
Read and understand this manual and all instructions before operating the DR 7.25 ALL-TERRAIN TRIMMER/MOWER.
Original Language
Toll-free phone: 1-800-DR-OWNER (376-9637)
Fax: 1-802-877-1213
Website: www.DRpower.com
Table of Contents
y
Chapter 1: General Safety Rules ............................................................................................................................................................ 3
Chapter 2: Setting Up the DR 7.25 ALL-TERRAIN TRIMMER/MOWER .............................................................................................. 6
Chapter 3: Operating the DR 7.25 ALL-TERRAIN TRIMMER/MOWER .............................................................................................. 10
Chapter 4: Maintaining The DR 7.25 ALL-TERRAIN TRIMMER/MOWER .......................................................................................... 14
Chapter 5: Troubleshooting .................................................................................................................................................................. 20
Chapter 6: Parts Lists and Schematic Diagrams .................................................................................................................................. 22
Conventions used in this manual
This indicates a hazardous situation, which, if not followed, will result in death or serious injury.
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
our 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
®
7.25 ALL-TERRAIN TRIMMER/MOWER
Chapter 1: General Safety Rules
Read this Safety & Operating Instructions manual before you use the DR 7.25 ALL-TERRAIN TRIMMER/MOWER. 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 7.25 ALL-TERRAIN TRIMMER/MOWER carries prominent labels as reminders for its proper and safe use. Shown below
are copies of 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 DR 7.25 ALL-TERRAIN TRIMMER/MOWER as you set up and before you operate the unit. Replace damaged
or missing safety and information labels immediately.
#32440
#32442
#13758
#13649
#34393
Protecting yourself and those around you
This is a high-powered machine, with moving parts operating with high energy at high speeds. You must protect yourself and
others from possible injury. Not taking proper precautions 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:
Always wear protective goggles or safety glasses with side shields while trimming to protect your eyes from possible thrown
debris.
Avoid wearing loose clothing or jewelry, which can catch on the machine’s moving parts.
We recommend wearing gloves while using this machine. Be sure your gloves fit properly and do not have loose cuffs or
drawstrings.
Wear shoes with non-slip treads when using your DR 7.25 ALL-TERRAIN TRIMMER/MOWER. If you have safety shoes, we
recommend wearing them. Do not use the machine while barefoot or wearing sandals with exposed toes or heels.
Wear long pants while operating the DR 7.25 ALL-TERRAIN TRIMMER/MOWER.
Use ear protectors or ear plugs rated for at least 20 dba to protect your hearing.
Keep bystanders at least 100 feet away from your work area at all times. The tips of the cutting cords on the DR 7.25 ALL-
TERRAIN TRIMMER/MOWER can throw sticks, small stones, gravel, and bits of debris over long distances at great velocity.
Do not travel over loose materials such as gravel or mulch with the trimmer head spinning. Doing so could cause personal
injury or property damage from thrown objects. Shut off the Tow Vehicle, set the parking brake and remove the key and then
shut down the Trimmer Engine to stop the spinning cords when another person or pet approaches.
Never tamper with safety devices. Check their proper operation regularly.
Never operate the machine when under the influence of alcohol, drugs, or medication.
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
machine and the trimming activity.
precautions:
Never
assume that children will remain where you last saw them. Always follow these
Keep children and pets out of the working area and 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 DR 7.25 ALL-TERRAIN TRIMMER/MOWER.
Use extra care when approaching blind corners, shrubs, trees, or other objects that may obscure your vision.
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, wait 5 minutes, disconnect the spark plug
wire, keeping it away from the spark plug to prevent accidental starting 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 cover over the carburetor air-intake removed, except for adjustment.
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 with use and can cause a severe burn; do not touch. Allow the engine to cool before
refueling, doing maintenance, or making adjustments.
Do not mow in the rain. Water on the spark plug may cause the engine to stall.
Keep combustible substances away from the engine when it is hot.
Never cover the machine while the muffler is still hot.
4 DR
®
7.25 ALL-TERRAIN TRIMMER/MOWER
Operating the Trimmer/Mower Safely
This is a high-powered machine, with moving parts operating with high energy at high speeds. 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. Keep in mind that the
operator or user is responsible for accidents or hazards occurring to other people, their property, and themselves. Always take the
following precautions when using this machine:
Be cautious when trimming in reverse and do not hit any obstacles. The machine is designed to spring out of the way when
hitting obstacles in the forward direction, not the reverse direction. If you hit obstacles with the Trimmer in the reverse
direction the trimmer could be damaged and is not covered by the Warranty.
Know how to stop the Trimmer quickly by shutting off the engine.
Never allow people who are unfamiliar with these instructions to use the DR 7.25 ALL-TERRAIN TRIMMER/MOWER. Allow
only responsible individuals who are familiar with these rules of safe operation to use your machine.
Do not exceed 1-3 mph when trimming to allow proper cutting and discharge of material.
Do not exceed 5 mph when transporting to prevent damage to the machine.
Operating your Trimmer/Mower with the head misaligned with the ground can result in poor cut quality, pivoting problems,
scalping during cutting, wear on your equipment, and damage to the cutting cord
Never place your hands, feet, or any part of your body on or under the mower deck in the path of the spinning cords, belt,
pulleys, or near the discharge opening while the machine is running. Keep area of discharge clear of people, animals,
buildings, glass, or anything else that will obstruct clear discharge, cause injury, or damage.
Your DR 7.25 ALL-TERRAIN TRIMMER/MOWER is a powerful tool, not a plaything. Exercise extreme caution at all times.
The design of your machine is for trimming and mowing grass, weeds, and other growth as specified in this manual. Do not
use it for any other purpose.
Whenever you leave the operating position to make adjustments, change cords or if you have to remove grass or debris from
the underside of the deck, always shut off the Tow Vehicle, set the parking brake and remove the Key. Shut off the Trimmer
Engine and after all moving parts to come to a complete stop, then wait five minutes before performing any maintenance
procedure or inspection on the Trimmer.
Be mindful of roll over hazards, changes in terrain, slopes, or wet conditions. Use care when backing up.
Stop the cutting cords when crossing gravel drives, walks, or roads.
Never, under any conditions, remove, bend, cut, fit, weld, or otherwise alter standard parts on the DR 7.25 ALL-TERRAIN
TRIMMER/MOWER. This includes all shields and guards. Modifications to your machine could cause personal injuries and
property damage and will void your warranty.
If the cutting cords strike a foreign object or if your machine should start making an unusual noise or vibration, shut off the
Tow Vehicle, set the parking brake and remove the Key. Shut off the Trimmer Engine and after all moving parts to come to a
complete stop, then wait five minutes before inspection. Vibration is generally a warning of trouble. Clean and repair and/or
replace damaged parts.
While using the DR 7.25 ALL-TERRAIN TRIMMER/MOWER, do not 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. Make sure that you have 100%
control of the Trimmer at all times.
Watch for traffic when mowing near roadways.
Use the machine only in daylight.
Be cautious when using your DR 7.25 ALL-TERRAIN TRIMMER/MOWER around fencing, wires, ropes, and hoses. It is
possible that these and other debris can become wound around the Trimmer Head of the machine, potentially damaging the
bearings or injuring you.
Do not operate the DR 7.25 ALL-TERRAIN TRIMMER/MOWER on slopes greater than is recommended in your Tow Vehicle’s
user manual.
Keep all nuts and bolts tight and keep the equipment in good operating condition.
A Note to All Users
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 7.25 ALL-TERRAIN TRIMMER/MOWER 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 7.25 ALL-TERRAIN TRIMMER/MOWER
A
s
A
l
It may be helpful to familiarize yourself with the controls and features of your DR 7.25 ALL-TERRAIN TRIMMER/MOWER 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 7.25 ALL-TERRAIN TRIMMER/MOWER Controls and Features
Pneumatic
Caster Wheel
Recoil Starter
Oil Fil
Gas Fill
Tow Hitch
Tow Bar
Choke Lever
Throttle Lever
Springback
ssembly
Trimmer Height
djustment Spacer
Trimmer
Guard
Belt Cover
Pneumatic
Tracking Wheel
Cutting Cord
Mow-Ball
Figure 1
6 DR
®
7.25 ALL-TERRAIN TRIMMER/MOWER
®
Cord Head
Specifications
2 1 4
s
Engine
Cutting Width
Cutting Heights
Cord Tip Speed (mph)
Cord Size
Offset Maximum Reach
Frame
Spindle Housing
Drive Belt
Cord Line Plates
Mow-Ball
Wheels
Hitch Type (pin/ball)
Hitch Height
Machine Dimensions
Machine Weight
Ground Clearance
Tow Bar Length
ASSEMBLY
725 Series Briggs and Stratton. See your Engine owner’s manual for detailed Engine Specifications
22"
3" to 6" in 1/2" increments
230
0.155" (Blue) or 0.175" (Green)
45" nominally, 60" or 72" in offset position
11 Gauge Steel, Painted
Cast Aluminum
3L x 77", Aramid Reinforced
Cast Aluminum
Heat, Impact, and UV-Resistant Polymer
9" Diameter x 3.5" Wide
1/2" diameter clevis pin; 2" Ball Hitch Compatible w/ Additional Kit
6" - 21" in 1.5" increments
81" L x 60" W x 23" H
262 lbs.
4" minimum
40"
Hardware Bag Parts (Figure 2 and Table Below)
Item Part no. Description QTY
1 ........ 34326 .......... Bolt, Hex, Flange, GR8, 3/8-16 x 3" LG .................... 2
2 ........ 16003 .......... Pin, Hitch Clip, 1/2" To 9/16", .12" Wire ................. 1
3 ........ 10179 .......... Washer, Flat, 1/2" ..................................................... 1
4 ........ 18737 .......... Pin, Clevis, 1/2" OD x 4.5" LG .................................. 1
5 ........ 18081 .......... Washer, Lock, 3/8" .................................................... 2
Compare the contents of the Hardware Bag with the list above and Figure 1. If
you have any questions please contact us at www.DRpower.com or call 1-800DR-OWNER (376-9637) for assistance.
Tools Needed:
9/16" Wrench
3/4" Wrench
1. Position the Tow Bar Assembly onto the Pivot Assembly and secure with two
Flange Bolts and Lock Washers using a 9/16" Wrench (Figure 3).
5
3
Figure 2
Flange Bolts and
Lock Washer
Tow Bar Assembly
Pivot Assembly
Figure 3
CONTACT US AT www.DRpower.com 7
2. Remove the Bolt, Flat washer and Locknut that is installed on the Pivot
Bracket using two 3/4" Wrenches (Figure 4).
3. Insert the Rod End of the Spring Assembly into the Pivot Bracket and secure
with a Bolt, Flat Washer and Locknut using two 3/4" Wrenches. Do not over
tighten.
Figure 4
Figure 5
Caster Bracket
Grease Fitting
Caster Wheel
Grease Fitting
Rod End
Pivot Bracket
Bolt, Flat Washer
and Locknut
Hitch Pin
Spacers
Caster Wheel
4. Remove the Hitch Pin from the Caster Wheel and install the Shaft into the
Caster Bracket (Figure 5). Reinsert the Hitch Pin to secure the Caster.
Greasing the Wheels and Wheel Support
Tools needed:
Grease gun
Lithium grease
Clean cloth
1. Apply general-purpose lithium grease to the Wheel Bracket Grease Fitting
and the Caster Wheel Grease Fitting using a grease gun (Figure 6).
2. Apply general-purpose lithium grease to the Tracking Wheel Grease Fitting
using a grease gun (Figure 7).
Adding Oil and Gasoline
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.
To get an accurate reading when checking the oil level:
- The machine should be on a level surface.
- The dipstick must
reading.
be screwed down to ensure an accurate oil level
Figure 6
Tracking
Wheel
Grease
Fitting
Figure 7
8 DR
®
7.25 ALL-TERRAIN TRIMMER/MOWER
Note: Refer to the Engine Manufacturers Manual for more detailed Engine
information.
Tip: To avoid confusion, we recommend leaving the caps ON the Fuel and Oil
Fills until you are ready to pour either gasoline or oil into the correct Fill.
Note: You will need approximately 15 to 22 ounces of SAE 30 high detergent oil
depending on Engine type. Use only SAE 30 high detergent oil classified “For Service
SF, SG, SH, SJ” or higher. Do not use special additives. Other types of oil could
cause problems with the operation of your machine. Please refer to your Engine
Owner’s Manual for detailed information on oil quantity and cold temperature oil
specifications.
1. Place the machine on a level surface and adjust the Tow Hitch as needed so
the Frame and Engine are level.
2. Initially add 1/2 of the SAE 30 High Detergent oil into the Oil Fill (Figure 8)
and wait one minute for the oil to settle.
3. 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.
4. Fill the Fuel Tank with fresh, unleaded gas (with a minimum of 87 Octane),
to not more than 1/4" from the bottom of the Fill Neck to allow for Fuel
expansion. Be careful not to overfill and reinstall the Cap before starting the
Engine. See your Engine Owner’s Manual for more information.
Note: To refill the Fuel Tank, turn the Engine OFF, and let the Engine cool at least
two minutes before removing the Fuel Fill Cap.
Fill the fuel tank outdoors or in a well-ventilated area, away from sparks, open
flames, pilot lights, heat, and other ignition sources.
Gas Fill
Oil Fill
Figure 8
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