Bush Hog DHM7 User manual

© 2021 Alamo Group Inc.
This Operator's Manual is an integral
part of the safe operation of this
machine and must be maintained
with the unit at all times. READ,
UNDERSTAND, and FOLLOW the
Safety and Operation Instructions
contained in this manual before
operating the equipment. C01-
Cover_B
Important Operating
and Safety
Instructions are
found in the Mower
Safety Video that can
be instantly
accessed on the
internet at:
www.algqr.com/bve
DISC
MOWER
Published 05/21 Part No. 50078281
OPERATOR’S MANUAL
BUSH HOG®
2501 Griffin Ave.
Selma, AL 36703
334-874-2700
www.bushhog.com
DHM7
$0.00

In order to reduce accidents and enhance the safe operation of mowers, Bush Hog, in cooperation with other
industry manufacturers has developed the AEM/FEMA Industrial and Agricultural Mower Safety Practices video
and guide book.
The video will familiarize and instruct mower-tractor operators in safe practices when using industrial and
agricultural mowing equipment. It is important that Every Mower Operator be educated in the operation of their
mowing equipment and be able to recognize the potential hazards that can occur while operating a mower. This
video, along with the mower operator’s manual and the warning messages on the mower, will significantly assist in
this important education.
Your Authorized Bush Hog Dealer may have shown this video and presented you a DVD Video when you
purchased your mower. If you or any mower operator have not seen this video, Watch the Video, Read this
Operator’s Manual, and Complete the Video Guidebook before operating your new mower. If you do not
understand any of the instructions included in the video or operator’s manual or if you have any questions
concerning safety of operation, contact your supervisor, dealer or Bush Hog.
If you would like a VHS video tape of the video, please email [email protected] or Fax AEM VHS
Video at [phone] or mail in a completed copy of the form on the back of this page to AEM VHS Video 1502
E Walnut Street, Seguin, TX 78155. and request the VHS video version. Please include your name, mailing
address, mower model and serial number.
Every operator should be trained for each piece of equipment (Tractor and Mower), understand the intended use
and the potential hazards before operating the equipment.
The information and material listed above along with this Operator’s Manual can assist you in meeting the OSHA
requirement for Operator annual training.
OSHA TRAINING REQUIREMENTS
The following training requirements have been taken from Title 29, Code of Federal Regulations Part
1928.57 (a)(6). www.osha.gov
Operator Instructions. At the time of initial assignment and at least annually thereafter, the employer shall instruct
every employee who operates an agricultural tractor in the safe operating practices and servicing of equipment with
which they are or will be involved, and of any other practices dictated by the work environment.

Bush Hog will provide
one (1) AEM Mower Safety Practices Video
Please Send Me: VHS Format – AEM/FEMA Mower Operator Safety Video
DVD Format – AEM/FEMA Mower Operator Safety Video
Mower Operator’s Manual
AEM Mower Operator’s Safety Manual
Requester Name:_________________________________Phone:___________________________
Requester Address: ___________________________________________
City:_____________________________________
State: ____________________________________
Zip Code:_________________________________
Mower Model:___________________________Serial Number:_____________________________
Date Purchased:__________________________Dealer Salesperson:_________________________
Dealership Name:________________________ Dealership Location:________________________
Mail to:
AEM Video Services
1502 E. Walnut Street
Seguin, TX 78155
Or Fax to:
[phone]
Or Email to:
AEMV[email protected]

To the Owner/Operator/Dealer
This Operator's Manual is an integral part of the safe operation of this machine and must be maintained with the
implement at all times. A Manual canister is provided on the implement where this manual can be properly stored.
If you lose or damage this manual a free replacement manual can be obtained from an authorized Bush Hog dealer
or by down loading the manual from the Bush Hog website www.bushhog.com
BEFORE YOU START! READ, UNDERSTAND, and FOLLOW the information provided in this manual, the AEM
Mower Safety manual and the tractor operator's manual carefully to learn how to operate and service your machine
properly. Failure to do so could result in personal injury to you and bystanders. All implements with moving parts
are potentially hazardous. Every effort has been made to ensure that the machine is safe, but operators must avoid
engaging in unsafe practices and follow the written instructions provided. The manufacturer has designed this
implement to be used with all its safety equipment properly attached to minimize the chance of accidents.
SAFETY FIRST. Completely read and understand the safety section of this manual before operating this
equipment. Do not allow anyone to operate this equipment who has not fully read and understood this manual.
Contact your Dealer to explain any instructions that you do not fully understand.
The care you give your Bush Hog Implement will greatly determine your satisfaction with its performance and its
service life. Carefully read and follow the instructions in this manual to provide you with a thorough understanding
of your new implement and its intended use and service requirements.
All references made in this manual to right, left, front, rear, top or bottom are as viewed facing the direction of
forward travel with the implement properly attached to the tractor.
Replacement Parts information is located in a separate Parts Manual. Bush Hog mowers use balanced and
matched system components for blade carriers, blades, cuttershafts, knives, knife hangers, rollers, drivetrain
components, and bearings. These parts are made and tested to Bush Hog specifications. Non-genuine “will fit”
parts do not consistently meet these specifications. The use of “will fit” parts may reduce mower performance, void
warranties, and present a safety hazard. Use genuine Bush Hog mower parts for economy and safety.
For future reference, record your Bush Hog product model number and serial number.
Dealer Telephone Model Number
Owner Purchase Date Serial Number
SERIAL NUMBER PLATE

DEALER to CUSTOMER Pre-Delivery / Operation
Instructions
Dealer should inform the Purchaser of this product of Warranty terms, provisions, and procedures that are
applicable. Dealer should also inform the Purchaser to review the contents of the Operator’s Manual including
safety equipment, safe operation and maintenance, to review the Safety Signs on the implement (and tractor if
possible) and of Purchaser’s responsibility to train his/her operators in safe operation procedures.
•IMPLEMENTS: I have explained that Deflectors, Chain Guards, or Solid Skirts must be installed and
maintained in good repair.
•DRIVELINES: I have made certain that all driveline, gearbox, and other shields are in good repair and fastened
securely in place to prevent injuries from entanglement or thrown objects.
•HYDRAULIC MACHINES: I have explained the necessity of using clean hydraulic oil, changing filters as
instructed, stopping leaks, damage caused by operating with over-heated oil, caring for hoses, using hoses of
proper rating, maintaining the specified operating pressure and the potential hazard of oil’s penetrating the
skin.
•FOLDING-TYPE IMPLEMENTS: I have explained that it is not possible to guard against thrown objects when
the head is lifted off ground and that operator is responsible to watch out for persons in the area. I have
explained that the lifted mower head or boom can contact overhead obstructions with damage to cables and
telephone lines and possible injury. I have explained that the extended head or boom or retracted boom can
contact power lines with resulting electrocution, injury or death and that operator is responsible for keeping
clear of such hazards.
PRE-DELIVERY SERVICE
CHECK AND ADJUST OR LUBRICATE AS REQUIRED
See Operator’s Manual for Details
Inspection Performed - Warranty and Safety Procedures Explained - Installation Complete
LUBRICATION & HYDRAULICS
Gearbox (Oil Levels)
Hydraulic Oil Level (External Tank)
Tractor Hydraulic Oil Level
Hydraulic Hoses (Not Kinked Tighten Connections)
Front Pump Drive (Assembly Is Tight And Shaft Properly
Aligned)
MOWER
Spindle And Motor Bolts Properly Torqued
Spindle Oil Level
Blade Carrier Bolts Properly Torqued/Retaining Pin In
Place
Mower Cutting Height And Level Adjusted
Cutting Shaft Bearings Lubricated
All Hardware Properly Torqued
Tire and Air Pressure/Lug Nuts (Correct Torque)
Wheel Bearings (Check, Grease, and Preload)
ATTACHMENTS & INSTALLATION
Deflectors Front And Rear
Shredding Attachments
Correct Blade Rotation Direction
Axle Arms And Beams
Tongue And Control Rods (Installed And Adjusted)
All Bolts - Pins And Nuts (Proper Torque)
MOWER TO TRACTOR CONNECTIONS
Draw Bar Length (Check And Set)
A-Frame Pivot & Links
Control Rods (Adjusted Equal)
Axle Height (Adjusted)
Cutting Height (Adjust)
Mount Kit-Pre-Operation Check Complete
Mower Wing (Adjust Level With The Center)
Mower Wing (Check For Proper Raising Operation)
C.V. Drivelines (Check Max Turn Radius)
Pull Type Hitch (Height Adjustment)
Mounting Hardware Properly Torqued
SAFETY ITEMS
Protective Shields (Operation And Installation)
Driveline Clutch (Torque Limiter) (Adjust And Run In)
Safety Decals (Installed)
Operator’s Manual (Supplied)
Tractor PTO Shield (Installed)
S.M.V. Emblem (Installed If Needed)
Tongue Jack (Installation and Operation)
Safety Tow Chain (Installed)
ADMA Driveline Safety Manual Supplied
AEM Mower Safety Manual (Supplied in Canister)
AEM Mower Safety Video has been shown to Purchaser

Table of Contents
SAFETY SECTION ............................................................................................................. 1-1
General Safety Instructions and Practices ........................................................................................................ 1-2
Equipment Operation Safety Instructions and Practices ................................................................................... 1-5
Connecting or Disconnecting Implement Safety Instructions and Practices ................................................... 1-10
Transporting Safety Instructions and Practices .............................................................................................. 1-10
Maintenance and Service Safety Instructions and Practices .......................................................................... 1-12
Storage and Parking Safety Instructions and Practices .................................................................................. 1-15
Concluding Safety Instructions and Practices ................................................................................................. 1-15
Decal Location ................................................................................................................................................ 1-16
Decals ............................................................................................................................................................. 1-18
FEDERAL LAWS AND REGULATIONS ......................................................................................................... 1-21
INTRODUCTION SECTION ................................................................................................ 2-1
ASSEMBLY SECTION ....................................................................................................... 3-1
TECHNICAL NOTES TO AID IN ASSEMBLY OF DHM7 ................................................................................. 3-2
Pins and Screws ............................................................................................................................................... 3-2
Shims, Spacers, Bushings and Washers .......................................................................................................... 3-2
Nuts, Grease Nipples ........................................................................................................................................ 3-2
.......................................................................................................................................................................... 3-2
OPERATION SECTION ...................................................................................................... 4-1
Standard Equipment and Specifications ........................................................................................................... 4-3
OPERATOR REQUIREMENTS ........................................................................................................................ 4-4
TRACTOR REQUIREMENTS ........................................................................................................................... 4-5
ROPS and Seat Belt ......................................................................................................................................... 4-5
Tractor Safety Devices ...................................................................................................................................... 4-5
Tractor Horsepower .......................................................................................................................................... 4-5
3-Point Hitch ..................................................................................................................................................... 4-6
Front End Weight ............................................................................................................................................. 4-6
Power Take Off (PTO) ...................................................................................................................................... 4-6
GETTING ON AND OFF THE TRACTOR ........................................................................................................ 4-7
Boarding the Tractor ......................................................................................................................................... 4-7
Dismounting the Tractor ................................................................................................................................... 4-8
STARTING THE TRACTOR ............................................................................................................................. 4-8
CONNECTING THE MOWER TO THE TRACTOR .......................................................................................... 4-9
Connecting the Mower ...................................................................................................................................... 4-9
How to adapt the cardan shaft ........................................................................................................................ 4-11
Road Use ........................................................................................................................................................ 4-12
Adjustments and Set-up .................................................................................................................................. 4-13
Belt Tension .................................................................................................................................................... 4-13
Cutting Height ................................................................................................................................................. 4-13
Use .................................................................................................................................................................. 4-14
Work Position .................................................................................................................................................. 4-14
Mowing ............................................................................................................................................................ 4-14
PRE-OPERATION INSPECTION AND SERVICE .......................................................................................... 4-14
Tractor Pre-Operation Inspection/Service ....................................................................................................... 4-15
Mower Pre-Operation Inspection/Service ....................................................................................................... 4-16
Cutting Component Inspection ........................................................................................................................ 4-17
DRIVING THE TRACTOR AND IMPLEMENT ................................................................................................ 4-21
Starting the Tractor ......................................................................................................................................... 4-22
Brake and Differential Lock Setting ................................................................................................................. 4-22
Driving the Tractor and Mower ........................................................................................................................ 4-23

Crossing Ditches and Steep Inclines .............................................................................................................. 4-23
OPERATING THE TRACTOR AND IMPLEMENT .......................................................................................... 4-25
Foreign Debris Hazards .................................................................................................................................. 4-26
Bystanders/Passersby Precautions ................................................................................................................ 4-26
Engaging the Power Take Off (PTO) .............................................................................................................. 4-27
PTO RPM and Ground Speed ........................................................................................................................ 4-28
Operating the Mower ...................................................................................................................................... 4-28
Shutting Down the Implement ......................................................................................................................... 4-30
DISCONNECTING THE MOWER FROM THE TRACTOR ............................................................................ 4-31
MOWER STORAGE ....................................................................................................................................... 4-32
TRANSPORTING THE TRACTOR AND IMPLEMENT .................................................................................. 4-32
Transporting the Mower .................................................................................................................................. 4-32
Transporting on Public Roadways .................................................................................................................. 4-35
Hauling the Tractor and Implement ................................................................................................................. 4-36
TROUBLESHOOTING GUIDE ....................................................................................................................... 4-38
MAINTENANCE SECTION ................................................................................................. 5-1
Disk and Blade Maintenance ............................................................................................................................ 5-2
How to Check the Mower Devices .................................................................................................................... 5-2
Disc Replacement ............................................................................................................................................. 5-4
LUBRICATION .................................................................................................................................................. 5-5
STORAGE ........................................................................................................................................................ 5-7
PROPER TORQUE CHART FOR FASTENERS .............................................................................................. 5-7

Safety Section 1-1
SAFETY SECTION

SAFETY
DHM7 05/21 Safety Section 1-2
© 2021 Alamo Group Inc.
SAFETY
General Safety Instructions and Practices
Operator Safety Instructions and Practices
A careful operator is the best operator. Safety is of primary importance to the manufacturer and should be to
the owner/operator. Most accidents can be avoided by being aware of your equipment, your surroundings, and
observing certain precautions. The first section of this manual includes a list of Safety Messages that, if
followed, will help protect the operator and bystanders from injury or death. Read and understand these Safety
Messages before assembling, operating or servicing this Implement. This equipment should only be operated
by those persons who have read the manual, who are responsible and trained, and who know how to do so
responsibly.
The Safety Alert Symbol combined with a Signal Word, as seen below, is used throughout this
manual and on decals which are attached to the equipment. The Safety Alert Symbol means:
“ATTENTION! BECOME ALERT! YOUR SAFETY IS INVOLVED!” The Symbol and Signal Word
are intended to warn the owner/operator of impending hazards and the degree of possible injury
faced when operating this equipment.
Indicates an imminently hazardous situation that, if not avoided, WILL result in DEATH OR
VERY SERIOUS INJURY.
Indicates an imminently hazardous situation that, if not avoided, COULD result in DEATH
OR SERIOUS INJURY.
Indicates an imminently hazardous situation that, if not avoided, MAY result in MINOR
INJURY.
Identifies special instructions or procedures that, if not strictly observed, could result in
damage to, or destruction of the machine, attachments or the environment.
NOTE: Identifies points of particular interest for more efficient and convenient operation or repair.(SG-1)
Practice all usual and customary safe working precautions and above all---remember safety is
up to YOU. Only YOU can prevent serious injury or death from unsafe practices.
READ, UNDERSTAND, and FOLLOW the following Safety Messages. Death or serious
injury may occur unless care is taken to follow the warnings and instructions stated in the
Safety Messages. Always use good common sense to avoid hazards. (SG-2)
Si no lee ingles, pida ayuda a alguien que si lo lea para que le traduzca las
medidas de seguridad. (SG-3)

SAFETY
DHM7 05/21 Safety Section 1-3
© 2021 Alamo Group Inc.
SAFETY
The rotating parts of this machine continue to rotate even after the PTO has been turned off.
The operator should remain in the operator’s seat for 60 seconds after the brake has been
set, the PTO disengaged, the tractor turned off, and all evidence of rotation has ceased.
(S3PT-10)
“Wait a minute...Save a life!”
Never operate the Tractor or Implement until you have read and
completely understand this Manual, the Tractor Operator’s Manual, and
each of the Safety Messages found in the Manual or on the Tractor and
Implement. Learn how to stop the tractor engine suddenly in an
emergency. Never allow inexperienced or untrained personnel to operate
the Tractor or Implement without supervision. Make sure the operator
has fully read and understood the manuals prior to operation. (SG-4)
The operator and all support personnel should wear hard hats, safety
shoes, safety glasses, and proper hearing protection at all times for
protection from injury including injury from items that may be thrown by
the equipment. (SG-16)
PROLONGED EXPOSURE TO LOUD NOISE MAY CAUSE
PERMANENT HEARING LOSS! Tractors with or without an Implement
attached can often be noisy enough to cause permanent hearing loss.
We recommend that you always wear hearing protection if the noise in
the Operator’s position exceeds 80db. Noise over 85db over an
extended period of time will cause severe hearing loss. Noise over 90db
adjacent to the Operator over an extended period of time will cause
permanent or total hearing loss. NOTE: Hearing loss from loud noise
[from tractors, chain saws, radios, and other such sources close to the
ear] is cumulative over a lifetime without hope of natural recovery. (SG-I7)
Always read carefully and comply fully with the manufacturer’s
instructions when handling oil, solvents, cleansers, and any other
chemical agent. (SG-22)
KEEP AWAY FROM ROTATING ELEMENTS to prevent entanglement
and possible serious injury or death. (SG-24)

SAFETY
DHM7 05/21 Safety Section 1-4
© 2021 Alamo Group Inc.
SAFETY
Never allow children to play on or around Tractor or Implement. Children can slip or fall off
the Equipment and be injured or killed. Inadvertent contact with controls can cause the
Implement to shift or fall crushing themselves or others. (SG-25)
DO NOT use drugs or alcohol immediately before or while operating the
Tractor and Implement. Drugs and alcohol will affect an operator’s
alertness and coordination and therefore affect the operator’s ability to
operate the equipment safely. Before operating the Tractor or Implement,
an operator on prescription or over-the-counter medication must consult
a medical professional regarding any side effects of the medication that
would hinder their ability to operate the Equipment safely. NEVER
knowingly allow anyone to operate this equipment when their alertness or
coordination is impaired. Serious injury or death to the operator or others
could result if the operator is under the influence of drugs or alcohol. (SG-27)
Prolonged operation may cause operator boredom and fatigue affecting safe operation.
Take scheduled work breaks to help prevent these potentially impaired operating
conditions. Never operate the Implement and Tractor in a fatigued or bored mental state
which impairs proper and safe operation. (SG-32)
Use extreme caution when getting onto the Implement to perform repairs, maintenance and
when removing accumulated material. Only stand on solid flat surfaces to ensure good
footing. Use a ladder or raised stand to access high spots which cannot be reached from
ground level. Slipping and falling can cause serious injury or death. (SG-33)
Avoid contact with hot surfaces including hydraulic oil tanks, pumps, motors, valves and
hose connections. Relieve hydraulic pressure before performing maintenance or repairs.
Use gloves and eye protection when servicing hot components. Contact with a hot surface
or fluid can cause serious injury from burns or scalding. (SG-34)
DO NOT operate this Implement on a Tractor that is not properly maintained. Should a
mechanical or Tractor control failure occur while operating, immediately shut down the
Tractor and perform repairs before resuming operation. Serious injury and possible death
could occur from not maintaining this Implement and Tractor in good operating condition.
(SG-36)
Avoid contact with hot surfaces of the engine or muffler. Use gloves and eye protection
when servicing hot components. Contact with a hot surface or fluid can cause serious injury
from burns or scalding. (SG-38)

SAFETY
DHM7 05/21 Safety Section 1-5
© 2021 Alamo Group Inc.
SAFETY
Equipment Operation Safety Instructions and Practices
Do not put hands or feet under mower decks. Blade Contact can result
in serious injury or even death. Stay away until all motion has stopped
and the decks are securely blocked up. (SGM-09)
Always keep a careful lookout and use extreme care when working around utility and
municipal obstructions. Never allow the Mower to contact any utility, municipal, or other
type structure. Clearly mark all mowing obstructions and consult local utility providers for
a safe code of operation. (SPU-5)
Do not operate the implement while wearing loose fitting clothing. Entanglement of the
clothing with the rotating elements can result in serious injury or even death. Stay clear of
all rotating elements at all times. (SSP-03)
Never leave the Tractor and Implement unattended while the Implement is in the lifted
position. Accidental operation of lifting lever or a hydraulic failure may cause sudden drop
of unit with injury or death by crushing. To properly park the implement when
disconnecting it from the tractor, lower the stand and put the retaining pin securely in place,
or put a secure support under the A-Frame. Lower the implement carefully to the ground.
Do not put hands or feet under lifted components. (S3PT-1)
This Implement may be wider than the Tractor. Be careful when operating or transporting
this equipment to prevent the Implement from running into or striking sign posts, guard rails,
concrete abutments or other solid objects. Such an impact could cause the Implement and
Tractor to pivot violently resulting in loss of steering control, serious injury, or even death.
Never allow the Implement to contact obstacles. (S3PT-12)
Be sure you have adequate knowledge of the property you will be working on. Take time to
make yourself aware of any area underground lines or cables. Contact with buried lines or
cable could result in serious injury or death. If in doubt about buried utility lines call 811
before digging or 1-800-258-0808. (SBH-6)
Operate this Equipment only with a Tractor equipped with an approved roll-
over-protective system (ROPS). Always wear seat belts. Serious injury or even
death could result from falling off the tractor, particularly during a turnover when
the operator could be pinned under the ROPS. (SG-7)

SAFETY
DHM7 05/21 Safety Section 1-6
© 2021 Alamo Group Inc.
SAFETY
BEFORE leaving the tractor seat, lower the implement, set the parking
brake and/or set the tractor transmission in parking gear, disengage the
PTO, stop the engine, remove the key, and wait for all moving parts to
stop. Place the tractor shift lever into a low range or parking gear to
prevent the tractor from rolling. Never dismount a Tractor that is moving
or while the engine is running. Operate the Tractor controls from the
tractor seat only. (SG-9)
Never allow children or other persons to ride on the Tractor or Implement.
Falling off can result in serious injury or death. (SG-10)
Never allow children to operate, ride on, or come close to the Tractor or
Implement. Usually, 16-17 year-old children who are mature and
responsible can operate the implement with adult supervision, if they
have read and understand the Operator’s Manuals, been trained in
proper operation of the tractor and Implement, and are physically large
enough to reach and operate the controls easily. (SG-11)
Do not mount or dismount the Tractor while the tractor is moving. Mount
the Tractor only when the Tractor and all moving parts are completely
stopped. (SG-12)
Start tractor only when properly seated in the Tractor seat. Starting a
tractor in gear can result in injury or death. Read the Tractor operators
manual for proper starting instructions. (SG-13)
Do not operate this Equipment with hydraulic oil or fuel leaking. Oil
and fuel are explosive and their presence could present a hazard. Do
not check for leaks with your hand! High-pressure oil streams from
breaks in the line could penetrate the skin and cause tissue damage
including gangrene. To check for a hose leak, SHUT the unit ENGINE
OFF and remove all hydraulic pressure. Wear oil impenetrable gloves,
safety glasses and use cardboard to check for evidence of oil leaks. If
you suspect a leak, REMOVE the HOSE and have it tested at a Dealer.
If oil does penetrate the skin, have the injury treated immediately by a
physician knowledgeable and skilled in this procedure. (SG-15)

SAFETY
DHM7 05/21 Safety Section 1-7
© 2021 Alamo Group Inc.
SAFETY
Never run the Tractor engine in a closed building or without adequate ventilation. The
exhaust fumes can be hazardous to your health. (SG-23)
Do not exceed the rated PTO speed for the Implement. Excessive PTO speeds can cause
Implement driveline or component failures resulting in serious injury or death. (SG-26)
Operate the Tractor and/or Implement controls only while properly seated in the Tractor
seat with the seat belt securely fastened around you. Inadvertent movement of the Tractor
or Implement may cause serious injury or death. (SG-29)
In case of mechanical difficulty during operation, place the transmission in the park
position, set the parking brake, shut down all power, including the PTO and the engine and
remove the key. Wait until all rotating motion has stopped before dismounting. (SG-39)
Do Not operate this equipment in areas where insects such as bees, may attack you and/or
cause you to lose control of the equipment. If you must enter in such areas, use a tractor
with an enclosed Cab and close the windows to prevent insects from entering. If a tractor
cab is not available, wear suitable clothing including head, face, and hand protection to
shield you from the insects. Attacking insects can cause you to lose control of the tractor,
which can result in serious injury or death to you or bystanders. Never dismount a moving
tractor. (SG-40)
Mow only in conditions where you have clear visibility in daylight or with adequate artificial
lighting. Never mow in darkness or foggy conditions where you cannot clearly see at least
300 feet (90 m) in front and to the sides of the tractor and mower. Make sure that you can
clearly see and identify passersby, steep slopes, ditches, drop-offs, overhead obstructions,
power lines, debris and foreign objects. If you are unable to clearly see these type of items
discontinue mowing. (SGM-1)
There are obvious and hidden potential hazards in the operation of this
Mower. REMEMBER! This machine is often operated in heavy brush
and in heavy weeds. The Blades of this Mower can throw objects if
shields are not properly installed and maintained. Serious injury or even
death may occur unless care is taken to insure the safety of the operator,
bystanders, or passersby in the area. Do not operate this machine with
anyone in the immediate area. Stop mowing if anyone is within 300 feet
of mower. (SGM-02)

SAFETY
DHM7 05/21 Safety Section 1-8
© 2021 Alamo Group Inc.
SAFETY
The rotating parts of this machine have been designed and tested for rugged use.
However, the components could fail upon impact with heavy, solid objects such as metal
guard rails and concrete structures. Such impact could cause the broken objects to be
thrown outward at very high velocities. To reduce the possibility of property damage,
serious injury, or even death, never allow the implement to contact such obstacles. (SGM-4)
Extreme care should be taken when operating near loose objects such
as gravel, rocks, wire, and other debris. Inspect the area before
mowing. Foreign objects should be removed from the site to prevent
machine damage and/or bodily injury or even death. Any objects that
cannot be removed must be clearly marked and carefully avoided by the
operator. Stop mowing immediately if blades strike a foreign object.
Repair all damage and make certain rotor or blade carrier is balanced
before resuming mowing. (SGM-05)
Many varied objects, such as wire, cable, rope, or chains, can become entangled in the
operating parts of the mower head. These items could then swing outside the housing at
greater velocities than the blades. Such a situation is extremely hazardous and could result
in serious injury or even death. Inspect the cutting area for such objects before mowing.
Remove any like object from the site. Never allow the cutting blades to contact such items.
(SGM-06)
Mow at the speed that you can safely operate and control the tractor and mower. The
correct mowing speed depends on terrain condition and grass type, density, and height of
cut. Normal ground speed range is from 2-5 mph (3-8 kph). Use slow mowing speeds
when operating on or near steep slopes, ditches, drop-offs, overhead obstructions, power
lines, or when debris and foreign objects are to be avoided. (SGM-07)
Avoid mowing in reverse direction when possible. Check to make sure there are no
persons behind the mower and use extreme care when maneuvering in reverse. Mow only
at a slow ground speed where you can safely operate and control the tractor and mower.
Never mow an area that you have not inspected and removed debris or foreign material.
(SGM-08)
Do not mow with two machines in the same area except with Cab tractors with the windows
closed. (SGM-11)

SAFETY
DHM7 05/21 Safety Section 1-9
© 2021 Alamo Group Inc.
SAFETY
Follow these guidelines to reduce the risk of equipment and grass fires
while operating, servicing, and repairing the Mower and Tractor:
-Equip the Tractor with a fire extinguisher in an accesible location.
-Do Not operate the Mower on a Tractor with an underframe exhaust.
-Do Not smoke or have an open flame near the Mower and Tractor.
-Do Not drive into burning debris or freshly burnt areas.
-Ensure slip clutches are properly adjusted to prevent excessive slippage and plate heating.
-Never allow clippings or debris to collect near drivelines, slip clutches, and gearboxes.
Periodically shut down the Tractor and Mower and clean clippings and collected debris from
the mower deck. (SGM-12)
The Mower is designed for certain mowing applications and is rated to cut up to a specific
size vegetation (see Mower Standard Equipment and Specifications). DO NOT use this
mower to cut vegetation above the Mower’s rated capacity or to cut any type of non-
vegetative material. Only operate this Mower on a properly sized and equipped Tractor.
Operating this Mower in an application for which it is not designed and/or operating the
Mower with the wrong size Tractor can cause Mower component damage and equipment
failure resulting in possible serious injury or death. (SGM-14)
Do not operate or pull the mower into standing water. When uplift or fan type mower blades
contact water they can be severely deflected downward causing possible failure of blade
resulting in serious boldly injury to the operator or bystanders. (SGM-15)
Use extreme caution when raising the Mower above ground level. Stop the Blades from
turning when the Mower is raised and passersby are within 100 yards. Raising the
Mower exposes the Cutting Blades which creates a potentially serious hazard and can
cause serious injury by objects thrown from the Blades or by contact with the Blades. (SPU-1)
Disc Mowers are capable under adverse conditions of throwing rocks and other debris for
a considerable distance (50 yards or more) and causing serious bodily injury. Follow safety
messages carefully.
STOP MOWING IF PASSERSBY ARE WITHIN 50 YARDS UNLESS:
-Front Curtain Shield is installed and in good condition. Replace
when needed with genuine Original Equipment Manufactuers parts.
-Mower cutting head is running close to and parallel to the ground surface.
-Passersby are outside the thrown object zone.
-The area to be cut has been cleared of foreign material such as rocks, cans, glass, and
debris. NOTE: This Disc mower is not to be used for highway maintenance. (SDM-1)

SAFETY
DHM7 05/21 Safety Section 1-10
© 2021 Alamo Group Inc.
SAFETY
Connecting or Disconnecting Implement Safety Instructions and
Practices
Transporting Safety Instructions and Practices
Disc Mowers rotate at a very high rate of speed (3000 RPM). Vibration due to missing,
broken, or unbalanced components may cause serious imbalance and lead to rapid failure
of components and possible bodily injury from components failure or thrown objects. KEEP
BLADE BOLTS AND DISC ATTACHING BOLTS TIGHTENED AS SPECIFIED IN
OPERATORS MANUAL TO ASSURE THE INTEGRITY OF THE ASSEMBLIES. (SDM-3)
There are obvious and hidden potential hazards in the operation of the Disc Mower.
REMEMBER! This machine is often operated in hay, grass , and heavy weeds which could
hide foreign objects. Remove all foreign debris before mowing an area. The Blades of this
mower can throw objects if shields are not installed and maintained. Serious injury or even
death may occur unless care is taken to insure the safety of the operator, bystanders, or
passersby in the area. Do not operate this machine with anyone in the immediate area.
Stop mowing if anyone is within 50 yards of mower. (SDM-4)
Do not let the Blades turn when the Mower Deck is raised for any
reason, including clearance or for turning. Raising the Mower deck
exposes the Cutting Blades which creates a potentially serious hazard
and could cause serious injury or even death from objects thrown from
the Blades. (SRM-07)
Always shut the Tractor completely down, place the transmission in park, and set the
parking brake before you or anyone else attempts to connect or disconnect the Implement
and Tractor hitches. (S3PT-15)
Be particularly careful when transporting the Implement with the Tractor. Turn curves or go
up hills only at a low speed and using a gradual steering angle. Rear mounted implements
move the center of gravity to the rear and remove weight from the front wheels. Make
certain, by adding front ballast, that at least 20% of the tractor’s weight is on the front wheels
to prevent rearing up, loss of steering control or Tractor tip-over. Slow down on rough or
uneven surfaces to prevent loss of steering control which could result in property damage
or possible injury. Do not transport unless 3-Point lift lever is fully raised and in the latched
transport position. Dropping implement in transport can cause serious damage to the
tractor and/or Implement and possibly cause the operator or others to be injured or killed.
(S3PT-02)

SAFETY
DHM7 05/21 Safety Section 1-11
© 2021 Alamo Group Inc.
SAFETY
This Implement may be wider than the Tractor. Be careful when operating or transporting
this equipment to prevent the Implement from running into or striking sign posts, guard rails,
concrete abutments or other solid objects. Such an impact could cause the Implement and
Tractor to pivot violently resulting in loss of steering control, serious injury, or even death.
Never allow the Implement to contact obstacles. (S3PT-12)
Make certain that the “Slow Moving Vehicle” (SMV) sign is installed in
such a way as to be clearly visible and legible. When transporting the
Equipment use the Tractor flashing warning lights and follow all local
traffic regulations. (SG-6)
Transport only at speeds where you can maintain control of the
equipment. Serious accidents and injuries can result from operating this
equipment at high speeds. Understand the Tractor and Implement and how it handles
before transporting on streets and highways. Make sure the Tractor steering and brakes
are in good condition and operate properly.
Before transporting the Tractor and Implement, determine the proper transport speeds for
you and the equipment. Make sure you abide by the following rules:
Test the tractor at a slow speed and increase the speed slowly. Apply the Brakes smoothly
to determine the stopping characteristics of the Tractor and Implement. As you increase
the speed of the Tractor the stopping distance increases. Determine the maximum
transport speed not to exceed 20 mph (30 kph) for transporting this equipment.
Test the equipment at a slow speed in turns. Increase the speed through the turn only after
you determine that the equipment can be operated at a higher speed. Use extreme care
and reduce your speed when turning sharply to prevent the tractor and implement from
turning over. Determine the maximum turning speed for you and this equipment before
operating on roads or uneven ground.
Only transport the Tractor and Implement at the speeds which allow you to properly control
the equipment.
Be aware of the operating conditions. Do not operate the Tractor with weak or faulty brakes
or worn tires. When operating down a hill or on wet or rain slick roads, the braking distance
increases: use extreme care and reduce your speed. When operating in traffic always use
the Tractor’s flashing warning lights and reduce your speed. Be aware of traffic around you
and watch out for the other guy. (SG-19)
Be particularly careful when transporting the Implement using the tractor. Turn curves or
go up or down hills only at a low speed and at a gradual steering angle. Make certain that
at least 20% of the tractor’s weight is on the front wheels to maintain safe steerage. Slow
down on rough or uneven surfaces. (STI-01)

SAFETY
DHM7 05/21 Safety Section 1-12
© 2021 Alamo Group Inc.
SAFETY
Maintenance and Service Safety Instructions and Practices
Only tow the Implement behind a properly sized and equipped Tractor
which exceeds the weight of the Implement by at least 20%. DO NOT
tow the Implement behind a truck or other type of vehicle. Never tow the
Implement and another Implement connected in tandem. Never tow the
Implement at speeds over 20 MPH. (STI-06)
Your driving vision may be reduced or impaired by the tractor, cab, or implement. Before
driving on public roadways identify any limited vision areas, and make adjustments to your
operating position, mirrors, and the implement transport position so that you can clearly
see the area where you will be traveling, and any traffic that may approach you. Failure to
maintain adequate vision of the public roadway and traffic can result in serious injury or
even death. (STI-10)
When the cutting head is folded for transport, the center of gravity of the Tractor is raised
and the possibility of overturn or tip-over is increased. Serious injury or even death could
result from a tractor turnover. Turn slowly and use extra care on hillsides. Never fold the
cutting head while on a hillside as the tractor might overturn. (SDM-2)
Make sure the PTO shield, integral driveline shields, and input shields
are installed when using PTO-driven equipment. Always replace any
shield if it is damaged or missing. (S3PT-8)
Relieve hydraulic pressure prior to doing any maintenance or repair work
on the Implement. Place the Implement on the ground or securely
blocked up, disengage the PTO, and turn off the tractor engine. Push
and pull the Remote Cylinder lever in and out several times prior to
starting any maintenance or repair work. (S3PT-09)
Always disconnect the main PTO Driveline from the Tractor before performing service on
the Implement. Never work on the Implement with the tractor PTO driveline connected and
running. Rotating Parts, or Drivelines could turn without warning and cause immediate
entanglement, injury or death. (S3PT-11)
Always maintain the safety signs in good readable condition. If the safety signs are missing,
damaged, or unreadable, obtain and install replacement safety signs immediately. (SG-5)