Modern Predator User manual
120’ Predator
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perator
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s Manual
YOU'RE ALWAYS AHEAD...WITH A MODERN BEHIND.
20' PREDATORRR CUTTER
P.O. BOX 790 • BEAUMONT, TX 77704
409.833.2665 • 1.800.231.8198 FAX: 409.726.8333
www.modernusa.com
Go Galvanized!
Operator’s Manual
20’ PREDATOR
2 20’ Predator
INTRODUCTION
Your heavy-duty cutter is designed primarily for weed, grass and brush to 2” diameter. With proper
maintenance as described in the manual, your cutter will provide you with years of dependable
service with a minimum of repairs.
It is recommended that all operators of this implement read this manual or be instructed of its
contents as to safety, proper operation, and maintenance before beginning operation.
Your cutter has been assembled for operation with a tractor PTO input speed of either 540 or
1000 RPM. Should you desire to change PTO input speed, contact you local dealer. This machine is
recommended for use with tractors rated at 50 HP (37 KW) to 120 HP (75 KW) for 540 RPM drive
and 50 HP (37KW) to 140 HP (104KW) for 1000 RPM drive.
When ordering parts for the gear boxes and the drivelines, be sure to specify the serial number.
The serial number is located outside the right tongue attaching plate on the center mainframe
section.
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all times.
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information, and mail promptly. Be sure to give the serial number of this cutter.
320’ Predator
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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
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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 save extensive repairs and costly downtime losses. The Operation
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correctly and attend to appropriate maintenance. The Trouble Shooting Guide helps diagnose
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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
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and be aware of the hazards of operating this blade 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.
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damage to, or destruction of the machine, attachments or the environment.
CAUTION
WARNING
DANGER
INTRODUCTION
4 20’ Predator
SAFETY SECTION
520’ Predator
A safe and 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
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section of this manual includes a list of guidelines that, if followed, will help protect the operator
and bystanders from injury or death. READ, UNDERSTAND, and FOLLOW the following safety
guidelines before assembling, operating or servicing this implement. Serious injury or death may
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3UDFWLFHDOOXVXDODQGFXVWRPDU\VDIHZRUNLQJSUHFDXWLRQVDQGDERYHDOOUHPHPEHUVDIHW\LVXS
to YOU.
Only YOU can prevent serious injury or death from unsafe practices.
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General Safety Guidelines
• Never operate the tractor or implement until you have read and completely understand this
manual and the tractor operator’s manual. Learn how to stop the tractor engine suddenly in
an emergency. Never allow inexperienced or untrained personnel to operate the tractor and
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manuals prior to operation.
• 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
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• Never allow children to operate, ride on, play on or around, or come close to the tractor or
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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.
• 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
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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
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alertness or coordination is impaired. Serious injury or death to the operator or others could
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SAFETY SECTION
6 20’ Predator
• Prolonged tractor operation may cause operator boredom and fatigue affecting safe operation.
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Never operate the implement and tractor in a fatigued or bored mental state which impairs
proper and safe operation.
• 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.
General Safety – Rotating Equipment
• The rotating parts of this machine continue to rotate even after the PTO has been turned off.
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disengaged, the tractor turned off, and all evidence of rotation has ceased.
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HYHQGHDWK6WD\DZD\XQWLODOOPRWLRQKDVVWRSSHGDQGWKHGHFNVDUHVHFXUHO\EORFNHGXS
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clothing with the rotating elements can result in serious injury or even death. KEEP AWAY FROM
ROTATING ELEMENTS to prevent entanglement and possible serious injury or death.
General Safety – Hot Surfaces & Fire Safety
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servicing, and repairing the tractor and/or implement:
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· Do Not operate the implement on a tractor with an underframe exhaust.
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· 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.
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FRQQHFWLRQVHQJLQHRUPXIÁHU5HOLHYHK\GUDXOLFSUHVVXUHEHIRUHSHUIRUPLQJPDLQWHQDQFHRU
repairs. Use gloves and eye protection when servicing hot components. Contact with a hot
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SAFETY SECTION
720’ Predator
Equipment Operation Safety
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Guards, Steel Guards, Gearbox Shields, PTO integral shields, and Retractable Door Shields should
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replaced with NEW blades to reduce the possibility of injury or death from thrown objects,
entanglement, or blade contact. NEVER ATTEMPT TO STRAIGHTEN, WELD, OR WELD
HARDFACING ON BLADES SINCE THIS WILL LIKELY CRACK OR OTHERWISE DAMAGE THE BLADE
WITH SUBSEQUENT FAILURE AND POSSIBLE SERIOUS INJURY FROM THROWN BLADES.
• Operate the tractor and/or implement controls only while 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. Do not mount/dismount the tractor while the tractor or implement
parts are moving. Mount the tractor only when the tractor and all moving parts are completely
stopped.
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SDUNLQJJHDUGLVHQJDJHWKH372VWRSWKHHQJLQHUHPRYHWKHNH\DQGZDLWIRUDOOPRYLQJSDUWV
WRVWRS3ODFHWKHWUDFWRUVKLIWOHYHULQWRDORZUDQJHRUSDUNLQJJHDUWRSUHYHQWWKHWUDFWRUIURP
rolling. Never dismount a tractor that is moving or while the engine is running.
• 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 possibly
resulting in injury or death by crushing. Lower the implement carefully to the ground. Do not put
hands or feet under lifted components.
• 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.
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372GULYHQHTXLSPHQW
• DO NOT operate this implement on a tractor that is not properly maintained. In case of
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SDUNLQJEUDNHVKXWGRZQDOOSRZHULQFOXGLQJWKH372DQGWKHHQJLQHDQGUHPRYHWKHNH\:DLW
until all rotating motion has stop before dismounting and perform repairs before resuming
operation. Serious injury and possible death could occur from not maintaining this implement
and tractor in good operating condition.
• Do not operate implement if excessive vibration exists. Shut down PTO and the tractor engine.
Inspect the implement to determine the source of the vibration. If implement blades are missing
SAFETY SECTION
8 20’ Predator
or damaged replace them immediately. Do not operate the implement until the blades have
been replaced and the implement operates smoothly. Operating the implement with excessive
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velocities. To reduce the possibility of property damage, serious injury, or even death, never
allow the implement to be operated with blades missing.
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WKHLUSUHVHQFHFRXOGSUHVHQWDKD]DUG'RQRWFKHFNIRUOHDNVZLWK\RXUKDQG+LJKSUHVVXUHRLO
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:HDURLOLPSHQHWUDEOHJORYHVVDIHW\JODVVHVDQGXVHFDUGERDUGWRFKHFNIRUHYLGHQFHRIRLOOHDNV
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WKHVNLQKDYHWKHLQMXU\WUHDWHGLPPHGLDWHO\E\DSK\VLFLDQNQRZOHGJHDEOHDQGVNLOOHGLQWKLV
procedure. Always read carefully and comply fully with the manufacturer’s instructions when
handling oil, solvents, cleansers, and any other chemical agent.
• Mow at the speed that you can safely operate and control the tractor and implement. Safe
mowing speed depends on terrain condition and grass type, density, and height of cut. Normal
ground speed range is from 2 to 5 mph. 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.
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behind the implement 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 implement. Never mow
an area that you have not inspected and removed debris or foreign material.
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implement to cut vegetation above the implement’s rated capacity or to cut any type of non-
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Operating this implement in an application for which it is not designed and/or operating the
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failure resulting in possible serious injury or death.
• Do not operate or pull the implement into standing water. When uplift or fan type implement
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resulting in serious boldly injury to the operator or bystanders.
• Do not mow with two machines in the same area except with cab tractors with the windows
closed.
SAFETY SECTION
920’ Predator
• Do Not attempt to raise or lower the implement wing unless the implement tongue is securely
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and possible serious injury or death. Raise or lower the implement wing only while seated in the
tractor operator’s seat with the seat belt securely fastened.
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ZKLFKZLOOFDXVHDFFHOHUDWHGZHDUDQGEUHDNDJHRIGULYHWUDLQFRPSRQHQWVDQGFRXOGUHVXOWLQ
possible injury from the separated Driveline sections.
• Periodically shut down the tractor and implement and clean clippings and collected debris from
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motion has ceased.
• Never crawl under a raised implement supported solely by the tractor 3-Point hitch. Release of
the control lever or mechanical failure will result in the implement falling and possible injury or
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supported.
Equipment Operation Safety – Clearances and Obstructions
• Rotary implements are capable under adverse conditions of throwing objects for great distances
(300 feet or more) and causing serious injury or death. Follow safety guidelines carefully.
• STOP MOWING IF PASSERSBY ARE WITHIN 100 YARDS
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PDNH\RXUVHOIDZDUHRIDQ\DUHDXQGHUJURXQGOLQHVRUFDEOHV$OZD\VNHHSDFDUHIXOORRNRXW
DQGXVHH[WUHPHFDUHZKHQZRUNLQJDURXQGXWLOLW\DQGPXQLFLSDOREVWUXFWLRQV1HYHUDOORZWKH
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obstructions and consult local utility providers for a safe code of operation.
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OLJKWLQJ1HYHUPRZLQGDUNQHVVRUIRJJ\FRQGLWLRQVZKHUH\RXFDQQRWFOHDUO\VHHDWOHDVW
\DUGVLQIURQWDQGWRWKHVLGHVRIWKHWUDFWRUDQGLPSOHPHQW0DNHVXUHWKDW\RXFDQFOHDUO\VHH
and identify passersby, steep slopes, ditches, drop-offs, overhead obstructions, power lines,
debris and foreign objects. If you are unable to clearly see these types of items discontinue
mowing.
• This implement is wider than the tractor. Be careful when operating or transporting this
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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.
SAFETY SECTION
10 20’ Predator
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are close by or underneath the wings. Allow ample clearance around the implement when
folding or unfolding the wings.
• 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
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velocities. To reduce the possibility of property damage, serious injury, or even death, never
allow the cutting blades to contact such obstacles.
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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
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LPPHGLDWHO\LIEODGHVVWULNHDIRUHLJQREMHFW5HSDLUDOOGDPDJHDQGPDNHFHUWDLQURWRURUEODGH
carrier is balanced before resuming mowing.
• This machine is often operated in heavy brush and in heavy weeds. The blades of this implement
can throw objects if shields are not properly installed and maintained. Serious injury or even
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passersby in the area. Do not operate this machine with anyone in the immediate area. Stop
mowing if anyone is within 100 yards of implement.
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
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required to mow, reduce wear and tear on the implement drivetrain, spread cut material better, eliminate
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• Many varied objects, such as wire, cable, rope, or chains, can become entangled in the operating
parts of the implement 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
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object from the site. Never allow the cutting blades to contact such items.
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serious hazard and could cause serious injury or even death from objects thrown from the
blades.
SAFETY SECTION
1120’ Predator
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FDXVH\RXWRORVHFRQWURORIWKHHTXLSPHQW,I\RXPXVWHQWHULQVXFKDUHDVXVHDWUDFWRUZLWK
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
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injury or death to you or bystanders. Never dismount a moving tractor.
Connecting or Disconnecting implement Safety
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EUDNHEHIRUH\RXRUDQ\RQHHOVHDWWHPSWVWRFRQQHFWRUGLVFRQQHFWWKHLPSOHPHQWDQGWUDFWRU
hitches.
• DO NOT use a PTO adapter to attach a non-matching implement driveline to a tractor PTO.
Use of an adapter can double the operating speed of the implement resulting in excessive
vibration, thrown objects, and blade and implement failure. Adapter use will also change the
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RUHTXLSPHQWIDLOXUHFDQUHVXOWIURPXVLQJD372DGDSWHU&RQVXOWDQDXWKRUL]HGGHDOHUIRU
assistance if the implement driveline does not match the tractor PTO.
• When attaching the implement input driveline to the tractor PTO, it is important that the
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securely in the groove on the tractor PTO shaft. A driveline not attached correctly to the tractor
PTO shaft could come loose and result in personal injury and damage to the implement.
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bottom out or become disengaged. Bottoming out occurs when the inner shaft penetrates the
outer housing until the assembly becomes solid-it can shorten no more. Bottoming out can
cause serious damage to the tractor PTO by pushing the PTO into the tractor and through the
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personal injury.
• On a fully-assembled unit, do not remove the Wing Retaining Strap until hoses are attached to
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bystanders away during operations.
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7RQJXHZLWKRXWXVLQJWKH7RQJXH-DFNFRXOGFDXVHVWUDLQVRURWKHULQMXU\$OORZLQJWKHWRQJXH
WRIDOOVXGGHQO\DQGXQH[SHFWHGO\FRXOGUHVXOWLQFUXVKLQJLQMXU\8VHWKH7RQJXH-DFNIRUOLIWLQJ
WKHLPSOHPHQWRQO\2YHUORDGLQJWKH7RQJXH-DFNFDQFDXVHIDLOXUHZLWKSRVVLEOHVHULRXVERGLO\
injury or even death.
SAFETY SECTION
12 20’ Predator
• To prevent tipping of implement when stored in folded position, use carrying wheels or
DGHTXDWHVWDQGVRQFHQWHUIUDPH
Transporting Safety
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RIWKHLPSOHPHQWE\DWOHDVW'2127WRZWKHLPSOHPHQWEHKLQGDWUXFNRURWKHUW\SHRI
vehicle. Never tow the implement and another implement connected in tandem. Never tow the
implement at speeds over 20 MPH.
• Secure the implement for transport before traveling on public roads. For pull-type implements,
secure the center axle using cylinder stops or transport pin and properly attach a safety chain
between the implement and tractor. Secure wings in upright position on folding implements
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0DNHFHUWDLQEHIRUHWUDQVSRUWLQJWKDWD´6ORZ0RYLQJ9HKLFOHµ609VLJQLVLQVWDOOHGLQVXFK
a way as to be clearly visible and legible. When transporting the implement use the tractor
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• Your driving vision may be reduced or impaired by the tractor, cab, or implement. Before driving
RQSXEOLFURDGZD\VLGHQWLI\DQ\OLPLWHGYLVLRQDUHDVDQGPDNHDGMXVWPHQWVWR\RXURSHUDWLQJ
position, mirrors, and the implement transport position so that you can clearly see the area
ZKHUH\RXZLOOEHWUDYHOLQJDQGDQ\WUDIÀFWKDWPD\DSSURDFK\RX)DLOXUHWRPDLQWDLQDGHTXDWH
YLVLRQRIWKHSXEOLFURDGZD\DQGWUDIÀFFDQUHVXOWLQVHULRXVLQMXU\RUHYHQGHDWK
• Understand the tractor and implement and how it handles before transporting on streets and
KLJKZD\V0DNHVXUHWKHWUDFWRUVWHHULQJDQGEUDNHVDUHLQJRRGFRQGLWLRQDQGRSHUDWHSURSHUO\
7UDQVSRUWRQO\DWVSHHGVZKHUH\RXFDQPDLQWDLQFRQWURORIWKHHTXLSPHQW6HULRXVDFFLGHQWV
DQGLQMXULHVFDQUHVXOWIURPRSHUDWLQJWKLVHTXLSPHQWDWKLJKVSHHGV%HIRUHWUDQVSRUWLQJWKH
WUDFWRUDQGLPSOHPHQWGHWHUPLQHWKHSURSHUWUDQVSRUWVSHHGVIRU\RXDQGWKHHTXLSPHQW0DNH
sure you abide by the following rules:
7HVWWKHWUDFWRUDWDVORZVSHHGDQGLQFUHDVHWKHVSHHGVORZO\$SSO\WKH%UDNHVVPRRWKO\WR
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
H[FHHGPSKNSKIRUWRZLQJWKLVHTXLSPHQW
7HVWWKHHTXLSPHQWDWDVORZVSHHGLQWXUQV,QFUHDVHWKHVSHHGWKURXJKWKHWXUQRQO\DIWHU
you determine that it is safe to operate at a higher speed. Use extreme care and reduce your
speed when turning sharply to prevent the tractor and implement from turning over. Determine
WKHPD[LPXPVDIHWXUQLQJVSHHGIRU\RXDQGWKLVHTXLSPHQWEHIRUHRSHUDWLQJRQURDGVRUXQHYHQ
ground.
SAFETY SECTION
1320’ Predator
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RUZRUQWLUHV:KHQRSHUDWLQJGRZQDKLOORURQZHWRUUDLQVOLFNURDGVWKHEUDNLQJGLVWDQFH
LQFUHDVHVXVHH[WUHPHFDUHDQGUHGXFH\RXUVSHHG:KHQRSHUDWLQJLQWUDIÀFDOZD\VXVHWKH
WUDFWRU·VÁDVKLQJZDUQLQJOLJKWVDQGUHGXFH\RXUVSHHG%HDZDUHRIWUDIÀFDURXQG\RXDQGZDWFK
out for the other guy.
• 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.
0DNHFHUWDLQE\DGGLQJIURQWEDOODVWWKDWDWOHDVWRIWKHWUDFWRU·VZHLJKWLVRQWKHIURQW
wheels to prevent rearing up, loss of steering control or tractor tip-over.
• When the wings are folded for transport, the center of gravity is raised and the possibility
of overturn is increased. Drive slowly and use extreme caution when turning on hillsides.
Overturning the implement could cause the implement to overturn the tractor and vice versa
resulting in serious injury or even death. Never fold wings on a hillside...the implement may
overturn.
• 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
WKHWUDFWRUDQGRULPSOHPHQWDQGSRVVLEO\FDXVHWKHRSHUDWRURURWKHUVWREHLQMXUHGRUNLOOHG
,QZHWFRQGLWLRQVZKHUHWKHUHLVDOLNHOLKRRGRIPDWHULDOFROOHFWLQJRQWKHLPSOHPHQWPDNH
certain that excess material is removed before traveling on public roadways.
$OORZVXIÀFLHQWFOHDUDQFHIRUWKHLPSOHPHQWWRVZLQJRXWZDUGZKLOHWXUQLQJ,PSOHPHQWVFDUULHG
EHKLQGWKHWUDFWRUZLOOVZLQJRXWVLGHWKHWLUHSDWKZKHQPDNLQJWXUQV&RQWDFWLQJDVROLGREMHFW
ZKLOHWXUQLQJZLOOFDXVHHTXLSPHQWGDPDJHDQGSRVVLEOHLQMXU\
$OZD\VNHHSDFDUHIXOORRNRXWDQGXVHH[WUHPHFDUHZKHQWUDQVSRUWLQJDURXQGRYHUKHDG
obstructions and electrical power lines. The implement wing can be over 10 feet high. Never
allow the implement wing to come within 10 feet of any power line.
Maintenance and Service Safety
• Periodically inspect all moving parts for wear and replace when necessary with authorized
VHUYLFHSDUWV/RRNIRUORRVHIDVWHQHUVZRUQRUEURNHQSDUWVDQGOHDN\RUORRVHÀWWLQJV0DNH
sure all pins have cotter pins and washers. Serious injury may occur from not maintaining this
PDFKLQHLQJRRGZRUNLQJRUGHU
SAFETY SECTION
14 20’ Predator
• Perform service, repairs and lubrication according to the maintenance section. Ensure the
XQLWLVSURSHUO\OXEULFDWHGDVVSHFLÀHGLQWKHOXEULFDWLRQVFKHGXOHDQGDOOEROWVDQGQXWVKDYH
SURSHUWRUTXH)DLOXUHWRSURSHUO\VHUYLFHUHSDLUDQGPDLQWDLQWKLVLPSOHPHQWLQJRRGRSHUDWLQJ
condition could cause component failure and possible serious injury or even death.
• Use extreme caution when getting onto the implement to perform repairs, maintenance and
ZKHQUHPRYLQJDFFXPXODWHGPDWHULDO2QO\VWDQGRQVROLGÁDWVXUIDFHVWRHQVXUHJRRGIRRWLQJ
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.
1HYHUZRUNXQGHUWKHLPSOHPHQWWKHIUDPHZRUNRUDQ\OLIWHGFRPSRQHQWXQOHVVWKHLPSOHPHQW
LVVHFXUHO\VXSSRUWHGRUEORFNHGXSWRSUHYHQWVXGGHQRULQDGYHUWHQWIDOOLQJZKLFKFRXOGFDXVH
serious injury or even death.
• Never attempt to lubricate, adjust, or remove material from the implement while it is in motion
RUZKLOHWUDFWRUHQJLQHLVUXQQLQJ0DNHVXUHWKHWUDFWRUHQJLQHLVRIIWKHWUDQVPLVVLRQLQSDUN
WKHSDUNLQJEUDNHVHWDQGWKDWWKHNH\LVZLWK\RXEHIRUHZRUNLQJRQWKHLPSOHPHQW
5HOLHYHK\GUDXOLFSUHVVXUHSULRUWRGRLQJDQ\PDLQWHQDQFHRUUHSDLUZRUNRQWKHLPSOHPHQW
3ODFHWKHLPSOHPHQWRQWKHJURXQGRUVHFXUHO\EORFNHGXSGLVHQJDJHWKH372DQGWXUQRIIWKH
tractor engine. Push and pull the Remote Cylinder lever in and out several times prior to starting
DQ\PDLQWHQDQFHRUUHSDLUZRUN
• Never interfere with factory-set hydraulic calibrations. Any change in calibration could cause a
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• Always disconnect the main PTO Driveline from the tractor before performing service on
WKHLPSOHPHQW1HYHUZRUNRQWKHLPSOHPHQWZLWKWKHWUDFWRU372GULYHOLQHFRQQHFWHGDQG
running. Rotating Parts, blades or drivelines could turn without warning and cause immediate
entanglement, injury or death.
• DO NOT weld or repair rotating implement components. Welds and other repairs may cause
severe vibration and/or component failure resulting in part being thrown from the implement
causing serious bodily injury. See your Authorized Dealer for proper repairs.
'2127ZHOGRUSHUIRUPKRWZRUNRQJDOYDQL]HGLPSOHPHQWV+HDWLQJEXUQLQJRIJDOYDQL]LQJ
material may release fumes which can be harmful to your health.
• 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.
SAFETY SECTION
1520’ Predator
Parts Information
• Modern Ag implements use balanced and matched system components for blade carriers,
EODGHVFXWWHUVKDIWVNQLYHVNQLIHKDQJHUVUROOHUVGULYHWUDLQFRPSRQHQWVDQGEHDULQJV7KHVH
SDUWVDUHPDGHDQGWHVWHGWR0RGHUQ$JVSHFLÀFDWLRQV$OZD\VUHSODFHEODGHVZLWKRULJLQDO
HTXLSPHQWPDQXIDFWXUHUEDODQFHGEODGHVHWV1RQJHQXLQH´ZLOOÀWµSDUWVGRQRWFRQVLVWHQWO\
PHHWWKHVHVSHFLÀFDWLRQV7KHXVHRI´ZLOOÀWµSDUWVPD\UHGXFHLPSOHPHQWSHUIRUPDQFHYRLG
warranties, and present a safety hazard. Use genuine Modern Ag implement parts for economy
and safety.
Safety Signs/Decals
• Modern Ag supplies safety decals on this product to promote safe operation. Damage to the
decals may occur while in shipping, use, or reconditioning. 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.
Concluding Safety Instructions and Practices
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HTXLSPHQWKD]DUGFRQWURODQGDFFLGHQWSUHYHQWLRQDUHGHSHQGHQWXSRQWKHDZDUHQHVVFRQFHUQ
prudence, and proper training of personnel involved in the operation, transport, maintenance,
and storage of the machine. Refer also to safety guidelines and operation instruction in each of
WKHDSSURSULDWHVHFWLRQVRIWKHWUDFWRUDQGHTXLSPHQWPDQXDOV3D\FORVHDWWHQWLRQWRWKH6DIHW\
6LJQVDIÀ[HGWRWKHWUDFWRUDQGHTXLSPHQW
SAFETY SECTION
16 20’ Predator
ITEM PART NO. DESCRIPTION QTY.
. . . . . . . 490-9000..........COMPLETEDECALSHEET..........1
1 ........................DONOTATTACH.................1
2 ........................LUBRICATE GEARBOX .............1
3 ........................THROWNOBJECTS ...............1
4 ........................ROTATINGBLADES................1
5 ........................ROTATINGDRIVELINE .............2
6 ........................WARNINGTOPREVENTINJURY....1
ADDITIONAL SAFETY DECALS BELOW
7 ..... 490-1024..........KEEPHANDSCLEAR ..............1
8 ..... 490-GALVCOAT ....CAUTION:GALVCOATING.........1
9 ..... 490-5009..........REPLACESHIELDS ................1
10 .... 490-2010..........RETORQUEGEARBOX.............1
11 .... 490-1022..........CAUTIONREPLACESHIELDS.......1
MORE DECALS ON NEXT PAGE
12
7
77
13
10
15
12
12
13
1
1
1
9
6
7
7
9
10
5
4
3
2
1
RE-TORQUE
GEARBOX NUTS
EVERY 40 HOURS
8
8 8
Galvanized
Units Only
11
* Safety decals item #1 - 6 are sold in
complete sets only. Additional safety decals
item #7-10 can be purchased separately.
See next page for additional cutter decals.
13
10
13
14
10
14
SAFETY DECAL PLACEMENT
1720’ Predator
20
490-1120
490-9000 Decal Sheet contains:
(1) Warning: To Prevent Injury
(2) Rotating Blades Keep Away
(1) Rotating Driveline Hazard
(1) Danger: Read Operator Manual
(1) Thrown Object Hazard
(1) Lubricate Gearbox
Cutter Size Decals
Modern Attachments
800-231-8198
490-2003
490-FEMA
490-1031
490-1023
490-EAGLE
490 EAGLE
BLUE
ITEM PART NO. DESCRIPTION QTY.
12 .... 490-1501............DANGER: LOWERING WING ......2
13 .... 490-1018............WARNING: NO LUBE. . . . . . . . . . . . .3
14 .... 490-4100............1000 RPM ......................1
15 .... 490-9020............TYPICAL SET-UP ................1
490-1000
ADDITIONAL CUTTER DECALS
18 20’ Predator
OPERATION SECTION
1920’ Predator
OPERATION
OPERATION INSTRUCTIONS
Our rotary cutters are manufactered with quality material by skilled workers. These cutters are
designed to cut grass, weeds, coop stalks, brush and other vegetation up to 4” diameter. The
cutter is equipped with protective defectors and/or chain guards to prevent objects being
thrown from the cutter by the blades, however, no shielding is 100% effective. All shields,
guards, deflectors and chains equipped on the unit must be maintained on the cutter in good
operational condition.
It is the operator’s responsibility to be knowlegable 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 cutter, tractor or a thrown object. Do not operate the cutter 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 cutter 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 flex-wing rotary cutter and are not necessarily
of all cutters. Some pictures may show shields removed for picture clarity. NEVER OPERATE this
implement without all shields in place and in good operational condition. The operator must be
familiar with the cutter and tractor operation and all associated safety practices before operating
the cutter and tractor. Proper operation of the cutter, as detailed in this manual, will help ensure
years of safe and satisfactory use of the cutter.
IMPORTANT: To avoid cutter damage, retorque all bolts after the first 10 hours of operation.
Retighten blade carrier retaining nut on lower shafts to 450 ft. lbs.
READ AND UNDERSTAND THE ENTIRE OPERATING INSTRUCTIONS AND SAFETY SECTION
OF THIS MANUAL AND THE TRACTOR MANUAL BEFORE ATTEMPTING TO USE THE
TRACTOR AND CUTTER. 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 cutter and tractor.
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.
PELIGRO
Si no lee ingles, pida ayuda a alguien que si lo lea para que le traduzca las
medidas de seguridad.
PELIGRO
20 20’ Predator
20 FT DRAGON PREDATORRR & SUPER PREDATORRR
STANDARD EQUIPMENT AND SPECIFICATIONS
Front chains and rear rubber guards are standard equipment. Single and rear chain guards are available as extra
HTXLSPHQWDWH[WUDFRVW0RGHUQUHFRPPHQGVFXWWHUVEHHTXLSSHGZLWKGHÁHFWRUVRUFKDLQJXDUGVIRUDOOPRZLQJ
purposes.
Cutting Width ........................238”
Transport Width ......................105”
OverallWidth........................246”
Overall Length .......................204”
Cutting Height .......................2”-15”
BladeOverlap........................5”
Wing Lift Hydraulics...................Standard
WingFlex............................90°Up/22°Down
-DFNVWDQG ............................Standard
Hitch................................SwivelClevis
BladeCarrier.........................PanStumpJumpers
+RUVHSRZHU5HTXLUHGPLQ ............100 hp
Gearbox Rating:
MainGearboxorDividerBox...........255 hp
Outboard Gearbox
orCenter&Wings....................210 hp
Output Shaft Diameter ................2”
CutCapacity.........................3”
Blade Tip Speed:
MainorCenter ......................540.........15,992 FPM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1000 .......16,052 FPM
Wings...............................540.........15,384 FPM
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1000 .......15,484 FPM
Driveline Size:
Main................................Cat.5ConstantVeloc.
Outboard Center or Wings.............Cat.4w/Slip Clutch
'HFN7KLFNQHVV .......................3/16”
6LGH6NLUW ............................1/4”x101/4”
5HSODFHDEOH6NLG6KRHV ...............Standard
SafetyChains ........................Standard(Front & Rear)
Weight (Approx) ......................6700 lbs. • 5500 lbs. (Dragon)
*DOYDQL]HG'HFN)UDPH .............Standard
StandardTires........................UsedAircraftTires(Super)•Laminate(Dragon)
DualTailwheels.......................Standard
HydraulicLevelLift....................Standard(Super)•Option (Dragon)
'HFN5LQJVWR3URWHFW'HFN ............Standard
OPERATION
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