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Published 10/10 Part No. 50068816C

OPERATOR’S MANUAL

BUSH HOG®

2501 Griffin Ave.

Selma, AL 36703

334-874-2700

www.bushhog.com

REAR-MOUNT

BOOM MOWER

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

RMB 1660

To the Owner/Operator/Dealer

All implements with moving parts are potentially hazardous. There is no substitute for a cautious, safe-minded

operator who recognizes the potential hazards and follows reasonable safety practices. The manufacturer has

designed this implement to be used with all its safety equipment properly attached to minimize the chance of

accidents.

BEFORE YOU START! Read the safety messages on the implement and shown in your manual. Observe the rules

of safety and common sense!

WARRANTY INFORMATION:

Read and understand the complete Warranty Statement found in this Manual. Fill out the Warranty Registration

Form in full and return it to within 30 Days. Make certain the Serial Number of the Machine is recorded on the

Warranty Card and on the Warranty Form that you retain.

In order to reduce accidents and enhance the safe operation of mowers, Bush Hog Division, 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 mail AEMVideo@alamo-group.com or Fax AEM VHS Video

at (830) 372-9529 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 annual operator 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 and implements 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.

Alamo Group Ag. Division is willing to 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:

(830) 372-9529

Or E-mail to:

AEMVideo@alamo-group.com

TABLE OF CONTENTS

SAFETY SECTION .............................................................................................................. 1-1

General Safety Instructions and Practices ......................................................................................................... 1-2

Operator Safety Instructions and Practices .......................................................................................................1-3

Connecting & Disconnecting Implement Safety Instructions & Practices ..........................................................1-5

Equipment Operation Safety Instructions and Practices .................................................................................... 1-6

Maintenance and Service Safety Instructions and Practices ........................................................................... 1-12

Transporting Safety Instructions and Practices ............................................................................................... 1-14

Concluding Safety Instructions and Practices .................................................................................................. 1-16

Decal Location ................................................................................................................................................. 1-17

Decal Description ............................................................................................................................................. 1-20

Federal Laws and Regulations ........................................................................................................................ 1-27

INTRODUCTION SECTION ................................................................................................. 2-1

ASSEMBLY SECTION ........................................................................................................ 3-1

TRACTOR SELECTION ....................................................................................................................................3-2

TRACTOR PREPARATION ............................................................................................................................... 3-3

Fitting Operator Guard ....................................................................................................................................... 3-3

DEALER SETUP INSTRUCTIONS .................................................................................................................... 3-4

ATTACHMENT TO TRACTOR .......................................................................................................................... 3-5

Flail Head Attachment ...................................................................................................................................... 3-12

OIL REQUIREMENTS ..................................................................................................................................... 3-13

Tank ................................................................................................................................................................. 3-13

FITTING CONTROL UNIT IN CAB .................................................................................................................. 3-13

Cable Controlled Models .................................................................................................................................. 3-13

RUNNING UP PROCEDURE .......................................................................................................................... 3-14

REMOVAL FROM TRACTOR ......................................................................................................................... 3-14

STORAGE ....................................................................................................................................................... 3-15

SUBSEQUENT ATTACHMENT TO IDENTICAL TRACTOR .......................................................................... 3-15

SUBSEQUENT ATTACHMENT TO DIFFERENT TRACTOR ......................................................................... 3-15

OPERATION SECTION ....................................................................................................... 4-1

Standard Equipment and Specifications ............................................................................................................ 4-3

OPERATOR REQUIREMENTS ......................................................................................................................... 4-4

TRACTOR REQUIREMENTS ............................................................................................................................ 4-5

ROPS and Seat Belt ..........................................................................................................................................4-5

Operator Thrown Object Protection ................................................................................................................... 4-5

Tractor Lighting and SMV Emblem .................................................................................................................... 4-6

Tractor Ballast .................................................................................................................................................... 4-6

Tractor Safety Devices .......................................................................................................................................4-7

Tractor Horsepower ...........................................................................................................................................4-7

3-Point Hitch ...................................................................................................................................................... 4-7

Hydraulics .......................................................................................................................................................... 4-7

Front End Weight ...............................................................................................................................................4-8

Power Take Off (PTO) ....................................................................................................................................... 4-8

GETTING ON AND OFF THE TRACTOR .........................................................................................................4-8

Boarding the Tractor ..........................................................................................................................................4-9

Dismounting the Tractor ..................................................................................................................................... 4-9

STARTING THE TRACTOR ............................................................................................................................ 4-10

PRE-OPERATION INSPECTION AND SERVICE ...........................................................................................4-11

Tractor Pre-Operation Inspection/Service ........................................................................................................ 4-11

Boom Unit Pre-Operation Inspection and Service ........................................................................................... 4-12

MACHINE CONTROLS ................................................................................................................................... 4-19

Cable Controls - Identification & Function ........................................................................................................ 4-19

Lever Functions ............................................................................................................................................... 4-20

Rotor Control .................................................................................................................................................... 4-21

BREAKAWAY ..................................................................................................................................................4-22

ROTOR OPERATING SPEED ......................................................................................................................... 4-23

FORWARD SPEED .........................................................................................................................................4-23

HIGH VOLTAGE CABLES ............................................................................................................................... 4-23

Hedge Cutting Procedure ................................................................................................................................ 4-24

Working on Adverse Slopes ............................................................................................................................. 4-25

Lift Float Kit (Optional) ..................................................................................................................................... 4-25

DRIVING THE TRACTOR AND IMPLEMENT .................................................................................................4-26

Starting the Tractor ..........................................................................................................................................4-27

Brake and Differential Lock Setting .................................................................................................................. 4-27

Driving the Tractor and Boom .......................................................................................................................... 4-28

OPERATING THE TRACTOR AND IMPLEMENT ........................................................................................... 4-28

Foreign Debris Hazards ................................................................................................................................... 4-29

Bystanders/Passersby Precautions ................................................................................................................. 4-29

Engaging the Power Take Off (PTO) ............................................................................................................... 4-30

Operating Speed and Ground Speed .............................................................................................................. 4-31

Operating the Mower ....................................................................................................................................... 4-31

Operating the Attached Mower Heads ............................................................................................................. 4-33

Shutting Down the Attached Head ................................................................................................................... 4-34

TRACTOR, BOOM, AND ATTACHED HEAD STORAGE ............................................................................... 4-35

TRANSPORTING THE TRACTOR AND IMPLEMENT ................................................................................... 4-35

Transport Position ............................................................................................................................................ 4-36

TRANSPORT POSITION-Head Attached ........................................................................................................4-37

TRANSPORT POSITION-Head Removal ........................................................................................................4-37

Transport Height .............................................................................................................................................. 4-38

Transporting on Public Roadways ................................................................................................................... 4-38

Hauling the Tractor and Implement .................................................................................................................. 4-41

TROUBLESHOOTING GUIDE ........................................................................................................................4-42

MAINTENANCE SECTION .................................................................................................. 5-1

LUBRICATION ................................................................................................................................................... 5-2

General .............................................................................................................................................................. 5-2

PTO SHAFT INSPECTION ................................................................................................................................5-2

PTO SHAFT LUBRICATION .............................................................................................................................. 5-2

HYDRAULIC SYSTEM ...................................................................................................................................... 5-3

Oil Supply ...........................................................................................................................................................5-3

Filtration Maintenance ........................................................................................................................................5-3

HYDRAULIC HOSES ......................................................................................................................................... 5-3

Hose Replacement ............................................................................................................................................ 5-4

Hose Warranty ................................................................................................................................................... 5-4

FLAILHEAD ....................................................................................................................................................... 5-5

CABLES ............................................................................................................................................................. 5-5

PTO GEARBOX ................................................................................................................................................. 5-6

STORAGE ......................................................................................................................................................... 5-6

PROPER TORQUE VALUES FOR FASTENERS .............................................................................................5-7

Safety Section 1-1

SAFETY SECTION

SAFETY

RMB 1660 11/10 Safety Section 1-2

SAFETY

General 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. Serious injury or

death 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

RMB 1660 11/10 Safety Section 1-3

SAFETY

Operator Safety Instructions and Practices

Engine Exhaust, some of its constituents, and certain vehicle components contain or emit

chemicals known to the state of California to cause cancer and birth defects or other

reproductive harm. (SG-30)

Battery posts, terminals and related accessories contain lead and lead compounds,

chemicals known to the state of California to cause cancer, birth defects or other

reproductive harm. (SG-31)

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)

SAFETY

RMB 1660 11/10 Safety Section 1-4

SAFETY

KEEP AWAY FROM ROTATING ELEMENTS to prevent entanglement

and possible serious injury or death. (SG-24)

Never allow children to play on or around Tractor or Implement. Children can slip or fall off

the Equipment and be injured or killed. Children can cause the Implement to shift or fall

crushing themselves or others. (SG-25)

NEVER 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

RMB 1660 11/10 Safety Section 1-5

SAFETY

Connecting & Disconnecting Implement Safety Instructions & Practices

The rotating parts of this machine continue to rotate even after the Tractor has been turned

off. The operator should remain in his seat for 60 seconds after the brake has been set, the

PTO disengaged, the tractor turned off, and all evidence of rotation has ceased. (SBM-5)

“Wait a minute...Save a life!”

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. (SFL-2)

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)

Do not put hands or feet near the cutter bar. Blade contact can result

in serious injury. Stay away until all motion has stopped and the

mower is securely blocked up. (SSM-1)

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)

Each Rear Wheel must have a minimum of 1500 pound contact with the

surface to prevent lateral instability and possible tip-over which could

result in serious bodily injury or even death. Widen the wheel tread and

add weights if needed. Refer to the mounting instructions or call Customer Service if you

need assistance with Counterweight Procedure. (SBM-11)

Do Not attempt to raise or lower the boom or mower head unless the Implement is securely

attached to the Tractor. The Implement could tip over and cause equipment damage and

possible serious injury or death. Do Not use the boom controls to assist in installing the

implement on the tractor. Raise or Lower the boom and mower head only while seated in

the Tractor operator’s seat with the seat belt securely fastened. Inadvertent contact with

the boom controls could allow a component to fall. A sudden or inadvertent fall by any of

these components could cause serious injury or even death. (SBM-23)

SAFETY

RMB 1660 11/10 Safety Section 1-6

SAFETY

Equipment Operation Safety Instructions and Practices

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)

Use extreme caution when raising the Mower head. Stop the Blades from turning when the

Mower Head is raised and passersby are within 300 feet. Raising the Mower head

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. (SBM-2)

Never Leave the mower unattended while the head is in the raised

position. The mower could fall causing serious injury to anyone who

might inadvertently be under the mower (SBM-4)

Always keep a careful lookout and use extreme care when working

around overhead obstructions. Never allow the Mower head or boom

within 10 feet of any power line. When working close to overhead

power lines consult your electric company for a safe code of operation.

(SBM-7)

The center of Gravity of Tractors equipped with a Rear-Mounted Boom

Mower is shifted to the rear and removes weight from the front wheels.

Add front ballast until at least 20% of the tractors weight is on the front

wheels to prevent rearing up, loss of steering control, and possibly

injury. (SBM-10)

Use extreme care and Safety Awareness when using the boom mower head to mulch loose

brush or wood that has fallen on the ground from overhead trimming. DO NOT mulch this

debris if bystanders, vehicles, livestock or buildings are within 300 feet of the mower. This

cut debris can be thrown at great velocities and could result in serious injury or even death. (SBM-17)

Do not back up this implement when the boom or mower head is extended. Backing could

damage the machine or its components. (SBM-19)

SAFETY

RMB 1660 11/10 Safety Section 1-7

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 accessible

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.

-Do Not attempt to mow or place the mower head close to

burning debris.

-Never allow clippings or debris to collect near drivelines,

gearboxes or hydraulic components such as valves, tanks,

pumps and motors. Periodically shut down the Tractor and

Mower and clean clippings and collected debris from the

mower deck. (SBM-20)

Do not operate Mower if excessive vibration exists. Shut down PTO and the Tractor

engine. Inspect the Mower to determine the source of the vibration. If Mower blades are

missing or damaged replace them immediately. Do not operate the mower until the

blades have been replaced and the Mower operates smoothly. Operating the Mower with

excessive vibration can result in component failure and 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 Mower to be operated with blades missing. (SFL-4)

SAFETY

RMB 1660 11/10 Safety Section 1-8

SAFETY

Flail Mowers are capable under adverse conditions of throwing

objects for great distances (300 feet or more) and causing serious

injury or death. Follow safety messages carefully.

STOP MOWING IF PASSERSBY ARE WITHIN 300 FEET UNLESS:

-Front and Rear Deflectors, Chain Guards, or Bands are installed and in good, workable

condition;

-Mower sections or Wings are running close to and parallel to the ground without

exposed Blades;

-All areas have been thoroughly inspected and all foreign material such as rocks, cans,

glass, and general debris has been removed.

NOTE: Where there are grass and weeds high enough to hide debris that could be

struck by the blades, the area should be: inspected and large debris removed, mowed at

an intermediate height, inspected closely with any remaining debris being removed, and

mowed again at desired final height. (This will also reduce power required to mow,

reduce wear and tear on the Mower drivetrain, spread cut material better, eliminate

streaking, and make the final cut more uniform.) (SFL-6)

Operate this Equipment only with a Cab Tractor. Always wear seat belts. (SG-45)

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)

SAFETY

RMB 1660 11/10 Safety Section 1-9

SAFETY

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)

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 blade 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)

SAFETY

RMB 1660 11/10 Safety Section 1-10

SAFETY

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)

The rotating parts of this machine have been designed and tested for rugged use.

However, the blades 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 cutting blades 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)

SAFETY

RMB 1660 11/10 Safety Section 1-11

SAFETY

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 to 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 mowing 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)

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)

Never leave the Implement and Power Unit unattended while the Implement is in the raised

position. Accidental operation of a lifting lever or a hydraulic failure may cause the

implement to suddenly fall causing serious injury or possible death to anyone who might

inadvertently be under the Implement. Lower the implement carefully to the ground. Do not

put hands or feet under lifted components. (SPU-3)

SAFETY

RMB 1660 11/10 Safety Section 1-12

SAFETY

Maintenance and Service Safety Instructions and Practices

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)

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)

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, Blades or Drivelines could turn without warning and cause

immediate entanglement, injury or death. (S3PT-11)

Never interfere with factory-set hydraulic calibrations. Any change in calibration could

cause a failure of the equipment and may result in injury. (SBH-13)

Relieve hydraulic pressure prior to doing any maintenance or repair work on the Implement.

Place the Mower Head on the ground or securely supported on blocks or stands, disengage

the PTO, and turn off the engine. Push and pull the control Levers or Joystick several times

to relieve pressure prior to starting any maintenance or repair work. (SBM-6)

All Safety Shields, Guards and Safety devices including (but not

limited to) - the Deflectors, Chain Guards, Steel Guards,

Gearbox Shields, PTO integral shields , and Retractable Door

Shields should be used and maintained in good working condition. All safety

devices should be inspected carefully at least daily for missing or broken

components. Missing, broken, or worn items must be replaced at once to reduce

the possibility of injury or death from thrown objects, entanglement, or blade

contact. (SBM-18)

DO NOT allow any person under a raised boom or mower head unless

it is securely locked up or supported. DO NOT approach the

Implement unless the Tractor is turned off and all motion has ceased.

Never work under the frame work, or any lifted component unless the implement is

securely supported or blocked up. Inadvertent contact with the controls could allow a

component to fall. A sudden or inadvertent fall by any of these components could cause

serious injury or even death. (SBM-22)

SAFETY

RMB 1660 11/10 Safety Section 1-13

SAFETY

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)

Do not modify or alter this Implement. Do not permit anyone to modify or alter this

Implement, any of its components or any Implement function. (SG-8)

Never work under the Implement, the framework, or any lifted

component unless the Implement is securely supported or blocked up

to prevent sudden or inadvertent falling which could cause serious

injury or even death. (SG-14)

Never attempt to lubricate, adjust, or remove material from the Implement while it is in

motion or while tractor engine is running. (SG-20)

Periodically inspect all moving parts for wear and replace when

necessary with authorized service parts. Look for loose fasteners, worn

or broken parts, and leaky or loose fittings. Make sure all pins have

cotter pins and washers. Serious injury may occur from not maintaining

this machine in good working order. (SG-21)

Do Not fill fuel tank while engine is running. Refuel only after engine has cooled down. If

fuel is spilled, move machine away from the area of the spill and avoid creating any source

of ignition until the gasoline has evaporated. (SG-28)

Perform service, repairs and lubrication according to the maintenance section. Ensure the

unit is properly lubricated as specified in the lubrication schedule and all bolts and nuts are

properly torqued. Failure to properly service, repair and maintain this Implement in good

operating condition could cause component failure and possible serious injury or even

death. (SG-35)

Use caution and wear protective gloves when handling sharp objects such as blades,

knives, and other cutting edges. Be alert to worn component surfaces which have sharp

edges. Sharp surfaces can inflict severe laceration injuries if proper hand protection is not

worn. (SG-37)

SAFETY

RMB 1660 11/10 Safety Section 1-14

SAFETY

Transporting Safety Instructions and Practices

Replace bent or broken blades with new blades. NEVER ATTEMPT TO STRAIGHTEN,

WELD, OR WELD HARDFACING ON BLADES SINCE THIS WILL LIKELY CRACK OR

OTHERWISE DAMAGE THE BLADE WITH SUBSEQUENT FAILURE AND POSSIBLY

CAUSE SERIOUS INJURY FROM THROWN BLADES. (SGM-10)

DO NOT weld or repair rotating mower components. Welds and other repairs may cause

severe vibration and/or component failure resulting in part being thrown from the mower

causing serious bodily injury. See your Authorized Dealer for proper repairs. (SGM-13)

PARTS INFORMATION

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. (SPBH-1)

SEE YOUR BUSH HOG DEALER

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)

Allow sufficient clearance for the Implement to swing outward while turning. Implements

carried behind the Tractor will swing outside the tire path when making turns. Contacting a

solid object while turning will cause equipment damage and possible injury. (S3PT-20)

Be particularly careful in transport. The Mower has raised the center of

gravity for the tractor and has increased the possibility of overturn.

Turn curves or go up slopes only at low speed and using a gradual

turning angle. Slow down on rough or uneven surfaces. (SBM-3)

SAFETY

RMB 1660 11/10 Safety Section 1-15

SAFETY

Secure the boom and mower head in the transport position before traveling on public roads.

Never transport on public roads with the boom and mower head extended. Always

disengage and lock out the hydraulic controls for the boom mower before transporting.

Inadvertent boom movement on public roads may contact with other vehicles resulting in

serious bodily injuries or even death. (SBM-21)

When transporting Boom Mower on a truck or trailer, the height or width

may exceed legal limits when the boom is in the transport position.

Contact with side or overhead structures or power lines can cause

property damage or serious injury or death. If necessary lower boom to

reduce height and/or remove mowing head to reduce width to the legal

limits. (SBM-8)

Never operate the Tractor and Mower Unit without an OPS (Operators

Protective Structure) or Cab to prevent injury from objects thrown from

ground or from overhead trimming. Stop mowing if workers or passersby

are within 300 feet. (SBM-9)

Make sure the Rotor Control Lever is in the OFF position and control lever locking

mechanism is in the “Locked” Position to prevent accidental movement. (SBM-26)

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)

SAFETY

RMB 1660 11/10 Safety Section 1-16

SAFETY

Concluding Safety Instructions and Practices

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)

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)

In addition to the design and configuration of this Implement, including Safety Signs and Safety Equipment,

hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper

training of personnel involved in the operation, transport, maintenance, and storage of the machine. Refer

also to Safety Messages and operation instruction in each of the appropriate sections of the Tractor and

Equipment Manuals. Pay close attention to the Safety Signs affixed to the Tractor and Equipment. (SG-18)

SAFETY

RMB 1660 11/10 Safety Section 1-17

SAFETY

Decal Location

NOTE: Bush Hog supplies safety decals on this product to promote safe operation. Damage to the decals may

occur while in shipping, use, or reconditioning. Bush Hog cares about the safety of its customers, operators,

and bystanders, and will replace the safety decals on this product in the field, free of charge (some shipping

and handling charges may apply). Contact your Bush Hog dealer to order replacement decals.

SAFETY

RMB 1660 11/10 Safety Section 1-18

SAFETY

ITEM PART NO. QTY LEVEL DESCRIPTION

1. D433 1 Decal Sheet Multiple Hazard

2. D388 1 Decal Sheet Driveline Hazards

3. D355 1 IMPORTANT Check Chains

4. 02962764 6 WARNING Pinch Points/Scissors

5. 02962765 1 DANGER Multiple Hazard/Crushing

6. 02965262 1 WARNING Oil Leaks

7. D354 1 DANGER Crushing Hazard

8. 50065309 1 LOGO Bush Hog Logo (14.85”)

9. 50068740 2 NAME RMB 1660 Model Name

10. 50061049 1 LOGO Bush Hog Logo (22”)

11. D524 1 BOOKLET Safety Booklet

12. 46505.01 1 _________ Canister (Operator’s Manual Inside)

13. 9313043 3 _________ Bolt

14. 9100103 3 _________ Flatwasher

15. 9143003 3 _________ Locknut

16. 46503.01 1 _________ Seal

17. 46505.01 1 _________ Operators Manual

18. 83380 1 REFLECT SMV Sign

19. NFS 1 SER PLT Serial Number Plate

20. 50068816C 1 _________ Operator’s Manual

21. D568 1 DANGER Operate with Enclosed Cab (Inside Cab)

22. D569 1 WARNING Operate Only with Cab Tractor

23. 10069088 4 _________ Pop Rivet

SAFETY

RMB 1660 11/10 Safety Section 1-19

SAFETY

ITEM PART NO. QTY LEVEL DESCRIPTION

1. 50061049 1 LOGO Bush Hog Logo (22”)

2. 24028 1 WARNING Rubber Deflectors

3. 02965141 1 WARNING Thrown Objects

4. 1290738 1 INSTRUCT Euro Multi-Instruction Flail Head

5. 09.821.35 1 MULTI-DECAL Euro Multi-Instruction

6. 1458392 1 REFLECT Red Reflector

7. 1458393 1 REFLECT Yellow Reflector

8. 41.094.14 1 SERIAL PLATE Serial Number Plate

9. 09.810.01 2 INSTRUCT Grease 8 Hours

SAFETY

RMB 1660 11/10 Safety Section 1-20

SAFETY

Decal Description

Multi Hazard Decal Sheet

P/N D433

Decal D433 consists of the following multi-hazards.

SAFETY

RMB 1660 11/10 Safety Section 1-21

SAFETY

Driveline Hazards

P/N D388

Decal D388 consists of the following multi-hazards.

SAFETY

RMB 1660 11/10 Safety Section 1-22

SAFETY

IMPORTANT! Keep Sway Bar Chains Tight

P/N D355

WARNING! Pinch Points

P/N 02962764

DANGER! Crushing and Pinch Points.

Moving machinery parts can pinch or crush or fall-

which may cause injury or death.

P/N 02962765

WARNING! Failure to INSPECT and REPAIR or

REPLACE Hoses may allow worn Hoses to rupture

SUDDENLY and VIOLENTLY with resulting serious

BODILY INJURY from SCALDING or FIRE with

resulting BURN INJURY or DEATH.

P/N 02965262

SAFETY

RMB 1660 11/10 Safety Section 1-23

SAFETY

DANGER! Crushing Hazard

Serious injury can result from contact with moving

boom. Stay clear of boom swing are.

P/N D354

P/N 50065309

Logo Product Name: Bush Hog (14.85”)

P/N 50068740

MODEL NAME - RMB 1660

P/N 50061049

Logo Product Name: Bush Hog (22”)

SAFETY

RMB 1660 11/10 Safety Section 1-24

SAFETY

INFORMATION - Safety Booklet

D524

Read Operator’s Manual! The operator’s manual is

located inside this canister. If the manual is

missing order one from your dealer.

P/N 46505.01

Slow Moving Vehicle Decal. Keep SMV reflector

clean and visible. DO NOT transport or operate

without the SMV.

P/N 83380

TO AVOID SERIOUS INJURY OR DEATH only

operate when inside a fully enclosed Tractor CAB.

P/N D568

SAFETY

RMB 1660 11/10 Safety Section 1-25

SAFETY

TO AVOID SERIOUS INJURY OR DEATH only

operate on Tractor equipped with fully enclosed

CAB.

P/N D569

WARNING! Inspect Rubber Deflector and replace

if damaged or noticeably worn. Do not operate

mower if deflector is missing or damaged.

P/N 24028

WARNING! - Cutting while Flail Head is raised off

ground will allow high-speed Flail Blades to throw

cuttings at high speed for a considerable distance.

Thrown objects can cause serious bodily injury.

Stop mowing when traffic, crew members, or

passerby are within 100 yards of the mowing with

head off ground.

P/N 02965141

Euro Flail Multi Decal

P/N 1290738

SAFETY

RMB 1660 11/10 Safety Section 1-26

SAFETY

Euro Multi Decal

P/N 09.821.35

Red Reflector. Keep reflectors clean and visible.

P/N 1458392

Amber Reflector. Keep reflectors clean and visible.

P/N 1458393

Grease 8 Hours

P/N 09.810.01

SAFETY

RMB 1660 11/10 Safety Section 1-27

SAFETY

Federal Laws and Regulations

This section is intended to explain in broad terms the concept and effect of federal laws and regulations concerning

employer and employee equipment operators. This section is not intended as a legal interpretation of the law and

should not be considered as such.

Employer-Employee Operator Regulations

U.S. Public Law 91-596 (The Williams-Steiger Occupational and Health Act of 1970) OSHA

This Act Seeks:

“...to assure so far as possible every working man and woman in the nation safe and healthful working

conditions and to preserve our human resources...”

DUTIES

Sec. 5 (a) Each employer-

(1) shall furnish to each of his employees employment and a place of employment which are free from

recognized hazards that are causing or are likely to cause death or serious physical harm to his employees;

(2) shall comply with occupational safety and health standards promulgated under this Act.

(b) Each employee shall comply with occupational safety and health standards and all rules, regulations and

orders issued pursuant to this Act which are applicable to his own actions and conduct.

OSHA Training Requirements

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 and implements 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.

Keep all guards in place when the machine is in operation;

Permit no riders on equipment

Stop engine, disconnect the power source, and wait for all machine movement to stop before servicing,

adjusting, cleaning or unclogging the equipment, except where the machine must be running to be properly

serviced or maintained, in which case the employer shall instruct employees as to all steps and procedures

which are necessary to safely service or maintain the equipment.

Make sure everyone is clear of machinery before starting the engine, engaging power, or operating the

machine.

Employer Responsibilities:

To ensure employee safety during Tractor and Implement operation, it is the employer’s responsibility to:

1. Train the employee in the proper and safe operation of the Tractor and Implement.

2. Require that the employee read and fully understand the Tractor and Implement Operator’s manual.

3. Permit only qualified and properly trained employees to operate the Tractor and Implement.

4. Maintain the Tractor and Implement in a safe operational condition and maintain all shields and guards on the

equipment.

5. Ensure the Tractor is equipped with a functional ROPS and seat belt and require that the employee operator

securely fasten the safety belt and operate with the ROPS in the raised position at all times.

6. Forbid the employee operator to carry additional riders on the Tractor or Implement.

7. Provide the required tools to maintain the Tractor and Implement in a good safe working condition and provide the

necessary support devices to secure the equipment safely while performing repairs and service.

8. Require that the employee operator stop operation if bystanders or passersby come within 300 feet.

Child Labor Under 16 Years of Age

Some regulations specify that no one under the age of 16 may operate power machinery. It is your responsibility to

know what these regulations are in your own area or situation. (Refer to U.S. Dept. of Labor, Employment Standard

Administration, Wage & Home Division, Child Labor Bulletin #102.)

Introduction Section 2-1

INTRODUCTION SECTION

INTRODUCTION

RMB 1660 11/10 Introduction Section 2-2

INTRODUCTION

This Hydraulic Boom Mower is designed with care and built with quality materials by skilled workers. Proper

assembly, maintenance, and operating practices, as described in this manual, will help the owner/operator get

years of satisfactory service from the machine.

The purpose of this manual is to familiarize, instruct, and train. The Assembly Section instructs the owner/

operator in the correct assembly of the Mower using standard and optional equipment. The Parts Listing

section is designed to familiarize the owner/operator with replaceable parts on the Mower. This section

provides exploded assembly drawings of each mower component illustrating each piece and the

corresponding part number.

Careful use and timely service saves extensive repairs and costly downtime losses. The Operation and

Maintenance Sections of the manual train the owner/operator how to work the Mower correctly and attend to

appropriate maintenance. The Troubleshooting Guide helps diagnose difficulties with mower and offers

solution to the problems.

Safety is of primary importance to the owner/operator and to the manufacturer. 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. Many of the Safety Messages will be repeated throughout the manual. The owner/operator/dealer

should know these Safety Messages before assembly and be aware of the hazards of operating this mower

during assembly, use, and maintenance. The Safety Alert Symbol combined with a Signal Word, as seen

below, is intended to warn the owner/operator of impending hazards and the degree of possible injury faced

when operating this machine.

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.

INTRODUCTION

RMB 1660 11/10 Introduction Section 2-3

INTRODUCTION

The Bush Hog Boom Mower is primarily designed for grass cutting and trimming hedges. This mower is

assembled for operation with 540 RPM tractor input only. With proper use and maintenance the mower should

provide years of dependable service.

For Non-Agricultural use, OSHA, ASABE, SAE and ANSI standards require the use of Chain

Guards, Deflectors, or Solid Skirts at all times. The Mower manufacturer strongly

recommends the use of Chain Guards, Deflectors, or Solid Skirts for Agricultural purposes

as well to reduce the risk of property damage, serious bodily injury, or even death from

objects thrown out by or from contact with the Cutting Blades.

At least 20% of the tractor’s total weight must be on the front tires with the Mower lifted to

provide adequate traction for safe steering under good conditions. Slow down on hills, rough

terrain, and curves.

Mower Orientation: Front and rear, and left and right are determined by the normal direction of travel (the same

as on your automobile).

INTRODUCTION

RMB 1660 11/10 Introduction Section 2-4

INTRODUCTION

ATTENTION OWNER/ OPERATOR

BEFORE OPERATING THIS MACHINE:

1. Carefully read the Operator’s Manual, completely understand the Safety Messages and instructions, and

know how to operate correctly both the Mower and Power Unit.

2. Fill out the Warranty Card in full. Be sure to answer all questions, including the Serial Number of the Mower.

Mail promptly using the return envelope included with the Operator’s Manual.

NOTE: Warranties are honored only if completed “Owner Registration and Warranty” forms are received by

Alamo Group within thirty days of delivery of the mower.

3. Record the Mower Model and Serial Numbers on the Warranty page at the end of the Operator’s Manual.

Keep this as part of the permanent maintenance file for the Mower.

Assembly Section 3-1

ASSEMBLY SECTION

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-2

ASSEMBLY

TRACTOR SELECTION

MINIMUM TRACTOR WEIGHTS - including ballast weight if necessary:

All models – 6,600 lbs.

MINIMUM HP REQUIREMENTS:

All models – 60 PTO HP

LINKAGE:

Category 2

P.T.O. SHAFT:

Tractor must be equipped with a live drive PTO to enable forward motion to be stopped while the flail head

continues to operate.

CHECK CHAINS/STABILIZERS:

Check chains or stabilizers must be fitted and tightened.

TRACTOR OPERATOR STATION:

Bush Hog recommends installing the 1660 Boom Mower on fully enclosed cab tractors equipped with

impact resistant glass windows. Do Not Operate if Tractor Cab is damaged.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-3

ASSEMBLY

TRACTOR PREPARATION

Fitting Operator Guard

Use tractor with safety glass windows if possible and fit Operator guard using the hooks provided. Shape mesh

to cover all vulnerable areas. Remember the driver must be looking through mesh and/or poly carbonate

glazing when viewing the flail head in any working position - unless the tractor/cab manufacturer can

demonstrate that the penetration resistance is equivalent to, or higher than, that provided by mesh/poly

carbonate glazing.

Wheel Width: Set wheel widths as wide as possible.

Lift Links: Adjust lift links until they are equal length.

Tractor Ballast: It is imperative when attaching ‘third-party’ equipment to a tractor that the maximum possible

stability of the machine and tractor combination is achieved – this can be accomplished by the utilization of

‘ballast’ in order to counter-balance the additional equipment added.

Front weights may be required to place 20% of total outfit weight on the front axle for stable transport on the

road and to reduce ‘crabbing’ due to the drag of the cutting unit when working on the ground.

Rear weights may be required to maintain a reasonable amount of rear axle load on the opposite wheel from

the arms when in work; for normal off-ground work i.e. hedge cutting this should be 20% of rear axle weight or

more for adequate control, and for ground work i.e. grass mowing with experienced operators, this can be

reduced to 10%. All factors must be addressed in order to match the type and nature of the equipment added

to the circumstances under which it will be used. The center of gravity on a RMB 1660 will constantly change

as the boom or cutting attachment moves. Maintaining proper balance during operation and transport is critical.

Factors that affect stability:

• Center of gravity of the tractor/machine combination.

• Geometric conditions, e.g. position of the cutting head and ballast.

• Weight, track width and wheelbase of the tractor.

• Acceleration, braking, turning and the relative position of the cutting head during these

• operations.

• Ground conditions, e.g. slope, grip, load capability of the soil/surface.

• Rigidity of implement mounting.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-4

ASSEMBLY

Suggestions to increase stability:

• Increasing rear wheel track; a tractor with a wider wheel track is more stable.

• Ballasting the wheel; it is preferable to use external weights but liquid can be added to around 75% of the

tire volume – water with anti-freeze or the heavier Calcium Chloride alternative can be used.

• Addition of weights – care should be taken in selecting the location of the weights to ensure they are added

to a position that offers the greatest advantage.

• Front axle locking; a cylinder can be used to ‘lock’ the front axle in work only – locking the axle moves the

‘balance line’ and can be used to transfer weight to the front axle from the rear (check with tractor

manufacturer).

The advice above is offered as a guide for stability only and is not a guide to tractor strength - it is therefore

recommended that you consult your tractor manufacturer or local dealer to obtain specific advise on this

subject, additionally advice should be sought from a tire specialist with regard to tire pressures and ratings

suitable for the type and nature of the machine you intend to fit.

DEALER SETUP INSTRUCTIONS

1. The machine will be delivered in a partially

dismantled condition, secured with transport

strap and banding.

2. Choose a firm level site.

3. Remove the transport strap, banding straps and

loose items.

4. Check the oil level.

5. Raise the machine using overhead lifting

equipment with a minimum capacity of 3307

lbs. LEAVE IN POSITION AT THIS STAGE.

6. Lower the legs and pin in position selecting the

holes that position the machines gearbox stub

shaft approx. 3” below the tractors P.T.O. shaft.

NOTE: Leg pin position used.

7. Unbolt stabilizer from machine and remove the

stabilizer nose quadrant pin.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-5

ASSEMBLY

ATTACHMENT TO TRACTOR

• Reverse tractor squarely up to the machine.

• Connect the tractors sway bars - selecting the

rear most hole in the machines lower link

brackets that allow the machine to be mounted

without contacting the tractor.

• Ensure that the same hole is used on both

sides.

• If necessary fit the spacers supplied (as

required) to minimise sideways movement of

the tractor sway bars within the hitch brackets.

• Tighten tractor’s stabilizers.

• The lifting equipment may now be removed.

• Fit the stabilizer tongue (A or B) into the tractors

top link position. Use the highest position

available avoiding any load sensing properties.

• The bolt-on tongue of the stabilizer is reversible

to accommodate a variety of tractor linkage

designs.

• Stretch out the stabilizer and rest the bottom

legs on the lower rail.

• Do not fit stabilizer lower pins at this stage.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-6

ASSEMBLY

• Fit the machine to top link

• Raise machine on tractor linkage until the tractors

PTO and the machines gearbox stub shaft are

approximately in line.

NOTE: As lift occurs be aware the machine may tilt

slightly.

The four levers of machine controls must be operated from the tractor seat. During this

operation ensure no one is standing on or among the linkage arms or bars. Set tractor

hydraulics to position control. Never allow anyone below the frame unless it is securely

blocked up.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-7

ASSEMBLY

• Replace the stabilizer quadrant pin and secure with

the clip pin.

NOTE: The quadrant pin must be fitted in the lowest

hole on the stabilizer in order that it acts as a “Bottom

Stop”. This will prevent the machine from dropping

when stopped and permit the tractor’s in-built transport

protection system to function correctly during operation

and transportation.

• Ensure the tractor’s linkage is in “Position Control”

and the linkage raised sufficiently to hold the sickle

bar at the correct height and remove the load from

the quadrant pin

NOTE: Never fit the quadrant pin in a location hole that

locks the stabilizer as this can cause damage to the

machine and/or tractor.

• Adjust the top link to bring the machine frame into

the vertical position.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-8

ASSEMBLY

Check that the welded in pins between the stabilizers jaws are in contact with the mounting rail. If not the

machine must be lowered to the ground and the next higher hole on the stabilizer valve selected, the machine

raised and contact checked. Repeat again in the third hole if necessary. On subsequent fitting to the same

tractor the hole selected is always used.

• Adjust the top link to bring the frame of the

machine into the vertical position.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-9

ASSEMBLY

• Adjust using the mounting hole that allows the

P.T.O. and gearbox shaft to align as near as

possible.

• Fit positioning stops - these remain in position

until tractor is changed

• Lower tractor linkage control so that the

machine weight is taken by the yoke.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-10

ASSEMBLY

• Raise the stand legs into the work position and

secure with lock pins.

• Tighten check chains and/or stabilizer bars.

• Fit machine controls into the cab.

• Measure P.T.O. and cut to dimension shown.

Note: For subsequent use on different tractors

measure again - there must be a minimum shaft

overlap of 6”.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-11

ASSEMBLY

• Fit PTO shaft in position.

• Attach safety chains (A) on driveline to a

convenient location to prevent rotation of the

shaft guarding.

• Ensure the Lift Cylinder shut-off valve and Slew

Cylinder shut-off valve are open.

• Operate the lift up controls and raise the dipper

arm end just enough to clear the ground.

• Pivot out the dipper arm until the tension link can

be connected.

Do Not attempt to raise or lower the boom or mower head unless the Implement is securely

attached to the Tractor. The Implement could tip over and cause equipment damage and

possible serious injury or death. Do Not use the boom controls to assist in installing the

implement on the tractor. Raise or Lower the boom and mower head only while seated in

the Tractor operator’s seat with the seat belt securely fastened. Inadvertent contact with

the boom controls could allow a component to fall. A sudden or inadvertent fall by any of

these components could cause serious injury or even death. (SBM-23)

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-12

ASSEMBLY

Flail Head Attachment

Operate machine controls to maneuver boom arm

into flailhead attachment. The bottom of the hose

connection bracket must be parallel with the

ground. Refer to torque chart for correct bolt torque

settings.

With the arms at half reach and the flailhead clear of the ground carry out final adjustment of the lift arm

leveling box to bring the main frame horizontal. Carefully operate the machine through its full range of

movements while checking that the hoses are not strained, pinched, chaffed or kinked and that all movements

are functioning correctly. Fold the machine into the transport position. The machine is now ready to proceed to

the work site.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-13

ASSEMBLY

OIL REQUIREMENTS

Tank

Fill reservoir to approximately 2” below the top of the tank. The capacity is approximately 180 liters (47.5

gallons). Do not overfill the tank.

FITTING CONTROL UNIT IN CAB

Cable Controlled Models

The control unit is bolted to a mounting bracket.

This bracket may be bolted to the fender or cab bracket in a convenient location ensuring that no structural

member of the cab or roll bar is drilled.

In deciding the final position of the control box remember not to exceed the minimum acceptable bend -radii of

8"' for the cables.

The control lever for the cable operated rotor control valve is mounted in a similar fashion adopting the same

precautions pertaining to drilling and cable runs.

Supplier Cold or Temperature Climate Hot Climate

Castrol Agricastrol hydraulic oil

Hy-spin AWS46 Hy-spin AWS68

Shell Tellus 46 Tellus 68

Mobil D.T.E. 25 D.T.E. 26

Esso Nuto “H” or “A” 46 Nuto “H” or “A” 68

Texaco Rando HD 46 Rando D 68

Gulf Hydrasil 46 Hydrasil 68

B.P. Energal HLP 46 Energal HLP 68

Dalton Silkolene Dove 46 or

Derwent 46 Silkolene Dove 68

or Derwent 68

Elf Hydrelf 46 Hydrelf 68

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-14

ASSEMBLY

RUNNING UP PROCEDURE

1. Ensure that the rotor control valve is in "STOP" position, start tractor, engage P.T.O. allow the oil to

circulate through the return line filter for about 5 minutes without operation of the armhead control lever.

2. Operate the armhead levers through their complete range ensuring that all movements are functioning

correctly.

3. Place the flail head at a safe attitude and move the rotor control to "START" position. After initial fluctuation

the rotor should settle to a steady speed. Increase P.T.O. speed to approximately 360 rpm. and run for a

further five minutes before disengaging and stopping tractor.

4. Check the hose runs and observe that they are free from any pinching, chafing, straining or kinks. Recheck

the oil level in the tank and top up as necessary.

Do not allow the pump to continue working if the rotor does not turn. Overheating and

serious pump damage to the pump can be caused in a very short time.

5. After running up the machine, increase PTO speed to approximately 360 RPM. Run machine further for

five minutes before disengaging the PTO and stopping tractor. The reason for this running period under a

no load condition is to thoroughly circulate the oil in the reservoir through the return line filter.

6. Check the hose runs and observe that they are free from any pinching, chafing, straining or kinks. Recheck

the oil level in the tank and top up as necessary.

REMOVAL FROM TRACTOR

Read carefully before commencing to remove the machine from the tractor.

The order of the following steps must be followed exactly. Disconnecting the top link must be the last operation

prior to driving the tractor away from the machine.

Do not operate valve lever or machine controls through the rear cab window while standing

on or among linkage components. Always seek assistance.

• Select a firm level site for parking the machine.

• Replace parking legs in their sockets and secure in their lowest position.

• Raise the machine on the tractor linkage until the weight is taken off the stabilizer.

• Remove the lower stabilizer pins.

• Unscrew the lift cylinder hydraulic shut-off valve.

• Lower the machine to be ground.

• Extend the arms and place the flail head on the ground at half reach.

• Disengage tractor PTO and remove.

• Disconnect stabilizer bars or loosen check chains as applicable.

• Unbolt the control unit from the mounting bracket, remove from tractor cab and stow the levers or

switchbox clear of the ground.

• Disconnect the stabilizer from the tractors top hitch position. Allow the stabilizer to slide along the rail until

it contacts the eccentric stops.

• Remove draft link pins and drive tractor away from machine.

ASSEMBLY

RMB 1660 11/10 Assembly Section 3-15

ASSEMBLY

STORAGE

If machine is to be left standing for an extended period of time, lightly coat the exposed portions of the cylinder

rods with grease. Subsequently this grease should be wiped off before the rods are moved. If the machine has

to be stored outside tie a piece of tarpaulin or canvas over the control assembly. Do not use a plastic fertilizer

bag which could lead to rapid corrosion.

SUBSEQUENT ATTACHMENT TO IDENTICAL TRACTOR

Refer to and follow steps on ‘initial attachment to tractor’ found on previous pages.

• Connect stabilizer into tractors top hitch position used previously.

• Raise the machine on the tractor linkage until the stabilizer contacts the eccentric stops.

• Fit stabilizer lower pins.

• Mount controls in the tractor cab.

• Fit PTO shaft and attach torque chain to a convenient point to prevent the shaft guard rotating.

• Place arms in work position at half reach and adjust lift arm levelling box to bring frame horizontal.

• Tighten check chains.

• Stow parking legs.

• Fold machine into transport position.

• Proceed to the work site.

SUBSEQUENT ATTACHMENT TO DIFFERENT TRACTOR

• Remove stabilizer and top link from machine and separate.

• Refer to and follow steps ‘initial attachment to tractor’.)

Operation Section 4-1

OPERATION SECTION

OPERATION

RMB 1660 11/10 Operation Section 4-2

OPERATION

BUSH HOG RMB 1660

OPERATING INSTRUCTIONS

Bush Hog Boom Mowers are manufactured with quality material by skilled workers. These mowers are

designed for cutting grass and small weeds. The mower is equipped with protective deflectors to prevent

objects being thrown from the mower by the blades, however, no shielding is 100% effective. All shields,

guards, and deflectors equipped on the mower must be maintained in good operational condition.

It is the operator’s responsibility to be knowledgeable of all potential operating hazards and to take every

reasonable precaution to ensure oneself, others, animals, and property are not injured or damaged by the

mower, tractor, or a thrown object. Do not operate the mower if passersby, pets, livestock, or property are

within 300 feet of the unit.

This section of the Operator’s Manual is designed to familiarize, instruct, and educate safe and proper mower

use to the operator. Pictures contained in this section are intended to be used as a visual aid to assist in

explaining the operation of a boom mower and are not specific to any model. Some pictures may show shields

removed for picture clarity. NEVER operate implement without all shields in place and in good operational

condition. The operator must be familiar with the mower and tractor and all associated safety practices before

operating the mower and tractor. Proper operation of the mower, as detailed in this manual, will help ensure

years of safe and satisfactory use of the mower.

IMPORTANT: To avoid mower damage, retorque all bolts after the first 10 hours of operation. Refer to the

Torque Chart at the end of the Maintenance Section to ensure bolts are properly tightened.

READ AND UNDERSTAND THE ENTIRE OPERATING INSTRUCTIONS AND SAFETY SECTION OF THIS

MANUAL AND THE TRACTOR MANUAL BEFORE ATTEMPTING TO USE THE TRACTOR AND

IMPLEMENT. If you do not understand any of the instructions, contact your nearest authorized dealer for a

full explanation. Pay close attention to all safety signs and safety messages contained in this manual and

those affixed to the implement and tractor. OPS-U- 0001

READ, UNDERSTAND, and FOLLOW the following Safety Messages. Serious injury or

death 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)

OPERATION

RMB 1660 11/10 Operation Section 4-3

OPERATION

1. Standard Equipment and Specifications

Tractor Requirements:

Minimum Tractor HP Requirements 60 HP PTO

Minimum Tractor Weight 6614lbs (3000kg)

Machine Specifications:

Maximum Machine Reach 16’-5” (5.0m)

Machine weight with flailhead 2434lbs (1104kg)

Power Arm Horsepower 54hp

Oil Tank Capacity 48g (180ltr)

Hydraulics:

Gear Totally Independent Standard

Method of Attachment:

3-Point Linkage-Mounted Standard

Controls:

Cable Control Standard

Machine Equipment:

Safety Breakaway - Hydraulic Standard

Road Light Kit Standard

Power Slew Standard

Cable Rotor Control Standard

Window Guards Standard

Power Arm Attachments:

Flail Mower

Sicklebar Mower

OPERATION

RMB 1660 11/10 Operation Section 4-4

OPERATION

2. OPERATOR REQUIREMENTS

Safe operation of the unit is the responsibility of a qualified operator. A qualified operator has read and

understands the implement and tractor Operator’s Manuals and is experienced in implement and tractor

operation and all associated safety practices. In addition to the safety messages contained in this manual,

safety signs are affixed to the implement and tractor. If any part of the operation and safe use of this

equipment is not completely understood, consult an authorized dealer for a complete explanation.

If the operator cannot read the manuals for themselves or does not completely understand the operation of the

equipment, it is the responsibility of the supervisor to read and explain the manuals, safety practices, and

operating instructions to the operator.

Safe operation of equipment requires that the operator wear approved Personal Protective Equipment (PPE)

for the job conditions when attaching, operating, servicing, and repairing the equipment. PPE is designed to

provide operator protection and includes the following safety wear:

PERSONAL PROTECTIVE EQUIPMENT (PPE)

• Always Wear Safety Glasses

•Hard Hat

• Steel Toe Safety Footwear

• Gloves

• Hearing Protection

• Close Fitting Clothing

• Respirator or Filter Mask (depends on

operating conditions) OPS-U- 0002