Page 1 FN20/FN14 NITRO FLEX-WING MECHANICAL LEVEL LIFT ROTARY MOWER Published 02/10 Part NO. 00778645C OPERATOR’S MANUAL 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.
Page 2 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.
Page 3: Table Of Contents
TABLE OF CONTENTS SAFETY SECTION ..................1-1 General Safety Instructions and Practices ......................1-2 Operator Safety Instructions and Practices ...................... 1-3 Equipment Operation Safety Instructions and Practices................... 1-5 Connecting or Disconnecting Implement Safety Instructions and Practices ........... 1-11 Transporting Safety Instructions and Practices ....................1-12 Maintenance and Service Safety Instructions and Practices ................
Page 4 Brake and Differential Lock Setting......................... 4-29 Operating the Mower Wings ........................... 4-29 Transport Position ............................4-30 Operating Position ............................4-30 Driving the Tractor and Cutter......................... 4-31 Crossing Ditches and Steep Inclines ......................4-32 OPERATING THE TRACTOR AND IMPLEMENT..................4-33 Foreign Debris Hazards ..........................4-34 Bystanders/Passersby Precautions ........................
Page 5 In order to reduce accidents and enhance the safe operation of mowers, Alamo Group Ag 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.
Page 6 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:...
Page 8: General Safety Instructions And Practices
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.
Page 9: Operator Safety Instructions And Practices
SAFETY 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.
Page 10 SAFETY Always read carefully and comply fully with the manufacturer’s instructions when handling oil, solvents, cleansers, and any other chemical agent. (SG-22) KEEP AWAY FROM ROTATING ELEMENTS to prevent entanglement and possible serious injury or death. (SG-24) Never allow children to play on or around Tractor or Implement. Children can slip or fall off the Equipment and be injured or killed.
Page 11: Equipment Operation Safety Instructions And Practices
SAFETY 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) Do not put hands or feet under mower decks. Blade Contact can result in serious injury or even death.
Page 12 SAFETY 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.
Page 13 SAFETY 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.
Page 14 SAFETY 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.
Page 15 SAFETY Follow these guidelines to reduce the risk of equipment and grass fires while operating, servicing, and repairing the Mower and Tractor: -Equip the Tractor with a fire extinguisher in an accesible location. -Do Not operate the Mower on a Tractor with an underframe exhaust. -Do Not smoke or have an open flame near the Mower and Tractor.
Page 16 SAFETY Rotary 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 100 YARDS UNLESS: -Front and Rear Deflectors, Chain Guards, or Bands are installed and in good, workable condition;...
Page 17: Connecting Or Disconnecting Implement Safety Instructions And Practices
SAFETY Connecting or Disconnecting Implement Safety Instructions and Practices 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 working length of the driveline exposing unshielded driveline areas.
Page 18: Transporting Safety Instructions And Practices
SAFETY Transporting Safety Instructions and Practices 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.
Page 19 SAFETY 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.
Page 20: Maintenance And Service Safety Instructions And Practices
SAFETY 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 using wing transport locks.
Page 21 SAFETY 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.
Page 22: Storage And Parking Safety Instructions And Practices
SAFETY PARTS INFORMATION Rhino 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 Rhino 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.
Page 23: Decal Location
SAFETY Decal Location NOTE: Rhino supplies safety decals on this product to promote safe operation. Damage to the decals may occur while in shipping, use, or reconditioning. Rhino 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).
Page 24 SAFETY ITEM PART NO. TYPE DESCRIPTION D389 DECAL Lift Unit Decal Sheet D388 DECAL Driveline Hazards D390 DECAL Pull Type Units D417 3(2) IMPORTANT Replace Blades in Pairs 00753840 3(1) DANGER Folding Wing Thrown Objects D401 INSTRUCT 1000 RPM (Not Shown) 999403 0(1) DANGER...
Page 25: Decal Description
SAFETY Decal Description Multi Hazard Decal Sheet P/N D389 Decal D389 consists of the following multi-hazards. FN20/FN14 NITRO 02/10 Safety Section 1-19 © 2010 Alamo Group Inc.
Page 26 SAFETY Driveline Hazards P/N D388 Decal D388 consists of the following multi-hazards. FN20/FN14 NITRO 02/10 Safety Section 1-20 © 2010 Alamo Group Inc.
Page 27 SAFETY Multi Hazard Decal Sheet P/N D390 Decal D390 consists of the following multi-hazards. FN20/FN14 NITRO 02/10 Safety Section 1-21 © 2010 Alamo Group Inc.
Page 28 SAFETY IMPORTANT! Always replace blades in pairs. P/N D417 DANGER! Stay clear when lowering or raising wings. P/N 00753840 1000 RPM P/N D401 DANGER! Keep everyone clear when lifting, folding, and working under raised components. Block securely before working under mower. Install Weight Box and Weight (Min.
Page 29 SAFETY For safety and to guarantee optimum product reliability always use genuine RHINO replacement parts. P/N 00760657 DANGER! Guard Missing, Do Not Operate. If you see this decal, Do Not Operate the mower until the shield has been replaced. P/N 00756004 NAME LOGO: NITRO P/N D558 NAME LOGO: NITRO...
Page 30 SAFETY Blade Rotation Counter Clockwise. P/N D137 Blade Rotation Clockwise. P/N D138 INFORMATION - 5 Year Gearbox Warranty P/N 00771283 INFORMATION - 2 Year Driveline Warranty P/N 00771284 FN20/FN14 NITRO 02/10 Safety Section 1-24 © 2010 Alamo Group Inc.
Page 31 SAFETY Logo Product Name: Rhino P/N 99102 Logo Product Name: Rhino P/N D302 Logo Product Name: Rhino P/N D303 Slow Moving Vehicle Decal. Keep SMV reflector clean and visible. DO NOT transport or operate without the SMV. P/N 03200347 FN20/FN14 NITRO 02/10 Safety Section 1-25 ©...
Page 32 SAFETY Red Reflector. Keep reflectors clean and visible. P/N 1458392 Amber Reflector. Keep reflectors clean and visible. P/N 1458393 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 00776031 WARNING! Explosion Hazard - Release all air pressure in tire before loosening bolts.
Page 33 SAFETY WARNING! Jack - Maximum Capacity 3,200 lbs. Side Load 2,000 lbs. P/N D482 IMPORTANT! Transport Latch - Lower and lock before transporting mower roadway. P/N D520 DANGER! Crushing Hazard - Falling Wings P/N D519 DANGER! Crushing Hazard - Transport Latch P/N D539 FN20/FN14 NITRO 02/10 Safety Section 1-27...
Page 34: Federal Laws And Regulations
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.
Page 80 INTRODUCTION This Rotary 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.
Page 81 INTRODUCTION Your FN20 NITRO is a super-duty Cutter/Shredder designed primarily for weed and grass control, brush up to 4-1/2" diameter, and shredding row crops such as cotton and corn stalks. With proper maintenance as described in this manual, your Cutter will provide you with years of dependable service with a minimum of repairs.
Page 82 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 tractor and implement. 2. Fill out the Warranty Card in full. Be sure to answer all questions, including the Serial Number of the implement.
Page 84: Dealer Set-Up Instructions
ASSEMBLY DEALER SET-UP INSTRUCTIONS The mower as received from the factory is virtually completely assembled and requires minimum time to complete assembly ready for sale. On a fully assembled unit, do not release the Wing Retaining Strap until the hoses are attached to the tractor and the Wing Cylinders are filled with oil.
Page 85 ASSEMBLY 2. Make sure the tractor PTO is the correct speed and shaft size for the implement. Ensure the drawbar is extended the proper distance from the Tractor PTO shaft for desired PTO speed; 540 PTO is 14” and for 1000 PTO speed the distance is 16”...
Page 86 ASSEMBLY 8. Remove retaining bracket from end yoke of main driveline. Remove main driveline from mower and place on ground or hard surface. Figure AsmP-R-0120 9. Make sure the wing Transport Bars/Latches are locked in the position to hold the wings vertical before removing shipping strap.
Page 87: Connecting Driveline
ASSEMBLY 11. Filling the cylinders with oil should raise the wings slightly and loosen the wing Transport Bars/Latches retaining pin. NOTE: DO NOT release the wing Transport Bar/Latch if there is a force on the pin. If there is a force holding the Transport Bar/Latch in place, use the tractor hydraulic control levers while in the tractor seat to raise the wings until the force is relieved.
Page 88: Driveline Attachment
ASSEMBLY When attaching the Implement input driveline to the Tractor PTO, it is important that the connecting yoke spring activated locking collar slides freely and the locking balls are seated securely in the groove on the Tractor PTO shaft. Push and pull the driveline back and forth several times to ensure it is securely attached.
Page 89: Tires And Wheels
ASSEMBLY 2. Inner center axle dual tire assemblies are shipped bolted on wing mount tubes. Remove transport bars from wings and lower each wing so that inner tire and hub assembly can be removed and installed on center axle. NOTE: It will be necessary to raise each side of center axle slightly so inner dual tires can be installed.
Page 90 ASSEMBLY Lubricate the PTO drivelines and wheel hubs according to the lubrication information found in the Maintenance Section. FN20/FN14 NITRO 02/10 Assembly Section 3-8 © 2010 Alamo Group Inc.
Page 92: Operation Instructions
OPERATION RHINO FN14/FN20 NITRO ROTARY MOWER OPERATION INSTRUCTIONS Rhino FN14/FN20 NITRO rotary mowers are manufactured with quality material by skilled workers. These mowers are designed to cut grass, weeds, small brush and other vegetative material up to 4-1/2” diameter in areas such as pastures and along highway right-of-ways.
Page 93: Standard Equipment And Specifications
OPERATION Standard Equipment and Specifications FN20 NITRO FN14 NITRO Cutting Width 240” 162” Transport Width 115” 106” Overall Width 248” 170” Overall Length 216” 216” Cutting Height 1/2”***-14-3/4” 1/2”***-14-3/4” Hitch Pull Pull Blade Overlap 6” 6” Blade Carrier Reinforced Pan or Bar HP Required (Min.) 80 HP 80 HP...
Page 94: Operator Requirements
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.
Page 95: Tractor Requirements
OPERATION 3. TRACTOR REQUIREMENTS The tractor used to operate the mower must have the power capacity to lift, pull, and operate the Power Take Off (PTO) at the mower’s rated speed while traveling at a ground speed between 2 and 5 MPH. Operating the mower with a tractor that does not meet the following requirements may cause tractor or mower damage and be a potential danger to the operator and passersby.
Page 96: Tractor Safety Devices
OPERATION 3.2 Tractor Safety Devices If transporting or operating the tractor and implement near a public roadway, the tractor must be equipped with proper warning lighting and a Slow Moving Vehicle (SMV) emblem which are clearly visible from the rear of the unit.
Page 97: Front End Weight
OPERATION to the Assembly Section of this manual for properly equipping the tractor with a 3-spool control valve. Tractors equipped with three hydraulic ports can position the center section and each wing independently with no extra equipment. If the tractor is equipped with only two hydraulic ports and a 3-spool control valve is not used, the wings cannot be operated independently and will raise and lower at different speeds.
Page 98: Boarding The Tractor
OPERATION 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) 4.1 Boarding the Tractor Use both hands and equipped handrails and steps for support when boarding the tractor. Never use control levers for support when mounting the tractor.
Page 99: Starting The Tractor
OPERATION 5. STARTING THE TRACTOR The operator must have a complete understanding of the placement, function, and operational use of all tractor controls before starting the tractor. Review the tractor operator’s manual and consult an authorized dealer for tractor operation instructions if needed. Essential Tractor Controls: •...
Page 100: Connecting The Mower Tongue To The Tractor
OPERATION 6.1 Connecting the Mower Tongue to the Tractor Ensure the tractor is equipped with the correct PTO shaft and the drawbar is set at the correct length. Using the parking jack, position the tongue clevis to the height of the tractor drawbar. Adjust the mower tongue clevis to be level and parallel with the tractor drawbar using the control rod connecting the mower tongue...
Page 101: Connecting Mower Hydraulic Lines To The Tractor
OPERATION Safety Tow Chain If the mower is towed on a public roadway, a safety chain with tensile strength equal to or greater than the gross weight of the mower must be connected between the tractor and mower. This will help control the implement in the event the tongue becomes disconnected from the drawbar.
Page 102: Setting The Mower
OPERATION Hydraulic Line Support After connecting the mower hydraulic lines to the tractor, support the hoses with the equipped brackets. Ensure that hoses do not contact the driveline, do not bind while turning, and do not become pinched or kinked. Hydraulic Cylinder Priming Hydraulic Cylinders must be filled with hydraulic oil before removing the wing transport braces to lower the mower wings.
Page 103: Setting Deck Pitch
OPERATION Level the mower deck front to rear by adjusting the leveling rods linking the tongue to the rear axle. DO NOT allow feet or other body part underneath the mower when making adjustments. To adjust rod length, loosen jamnut and screw turnbuckles. To lower the front, lengthen the rods and to raise the front, shorten the rods.
Page 104: Lowest Cutting Height
OPERATION 7.3 Lowest Cutting Height NOTE: Only operate in the lower position when you are mowing in an agricultural application, be sure there are no bystanders, passerby or livestock with in 300 feet. . To achieve the lowest possible cutting height, raise the side skirt from the upper set of holes to the lower set of holes shown in Figure Op-245 Never crawl under a raised Implement supported solely by the Tractor 3-Point hitch.
Page 105: Driveline Attachment
OPERATION Rotary 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 100 YARDS UNLESS: -Front and Rear Deflectors, Chain Guards, or Bands are installed and in good, workable condition;...
Page 106 OPERATION Before operating the Implement, check to make sure the Implement input driveline will not 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 support bearings or downward onto the PTO shaft, breaking it off.
Page 107: Constant Velocity (Cv) Driveline
OPERATION 8.1 Constant Velocity (CV) Driveline For mowers equipped with a Constant Velocity (CV) driveline, the maximum turning angle between the tractor and mower must be determined to ensure the joint angle does not over-extend which can cause CV joint damage.
Page 108: Pre-Operation Inspection And Service
OPERATION The Constant Velocity PTO driveline is HEAVY (70 lbs or greater) and Special Lifting Procedures are recommended. Use lifting assistance such as mechanical assistance, two people, and proper lifting techniques when connecting or installing the driveshaft to reduce the possibility of back injuries. Do not turn so sharp or lift mower so high to produce a severe "knocking"...
Page 109: Tractor Pre-Operation Inspection/Service
OPERATION 9.1 Tractor Pre-Operation Inspection/Service Refer to the tractor operator’s manual to ensure a complete pre-operation inspection and scheduled service performed according manufacturers recommendations. The following are some of the items that require daily service and inspection: • Tire condition/air pressure •...
Page 110 OPERATION The operator’s manual and safety signs affixed on the unit contain important instructions on the safe and proper use of the equipment. Maintain these important safety features on the implement in good condition to ensure the information is available to the operator at all times.
Page 111 OPERATION • Ensure the tractor PTO master shield is in place, lowered and in good condition. • Ensure each mower slip clutch shield is secured in place and in good condition. • Ensure the driveline slip clutches are properly adjusted and the friction plates are not frozen together.
Page 112 OPERATION • Ensure each hydraulic cylinder is installed and retained correctly. Ensure the proper size pins are used to retain the cylinders in place and are secured with pins. • Check for hydraulic oil leaks on the cylinders, along the hydraulic lines, and at tractor hydraulic ports.
Page 113: Cutting Component Inspection
OPERATION 9.3 Cutting Component Inspection Inspect blade pan and blade assembly for the following: OPS-U-0031 FN20/FN14 NITRO 02/10 Operation Section 4-23 © 2010 Alamo Group Inc.
Page 114 OPERATION Operating the mower with loose blade hardware will damage the blade holder or blades and can result in blade breakage or blade fastener failure. Broken blades or bolts can be thrown out from under the mower for distances up to 300 feet. When the blades are replaced, the fastening hardware must be replaced.
Page 115: Blade Bolt Inspection
OPERATION 9.4 Blade Bolt Inspection Inspect Blade Bolt Head daily for wear as followed: Inspect the Blade Bolt Heads daily for abnormal wear. REPLACE BOTH BLADE BOLTS on the Blades IMMEDIATELY if either blade bolts has: • Visible cracks or •...
Page 116 OPERATION Rotary Mower PRE-OPERATION Inspection Mower ID#________________ Make ____________________ Date: ________________ Shift ____________________ Before conducting the inspection, make sure the tractor engine is off, all rotation has stopped and the tractor is in park with the parking brake engaged. Make sure the mower is resting on the ground or securely blocked up and all hydraulic pressure has been relieved.
Page 117 OPERATION Tractor PRE-OPERATION Inspection Tractor ID#________________ Make ____________________ Date: ________________ Shift ____________________ Before conducting the inspection, make sure the tractor engine is off, all rotation has stopped and the tractor is in park with the parking brake engaged. Make sure the mower is resting on the ground or securely blocked up and all hydraulic pressure has been relieved.
Page 118: Driving The Tractor And Implement
OPERATION 10. DRIVING THE TRACTOR AND IMPLEMENT Safe tractor transport requires the operator possess a thorough knowledge of the model being operated and precautions to take while driving with an attached implement. Ensure the tractor has the capacity to handle the weight of the implement and the tractor operating controls are set for safe transport.
Page 119: Starting The Tractor
OPERATION 10.1 Starting the Tractor The procedure to start the tractor is model specific. Refer to the tractor operator’s manual for starting procedures for your particular tractor. Consult an authorized dealer if the starting procedure is unclear. Ensure the 3-point control lever is in the lowered position and the PTO is disengaged before starting the tractor.
Page 120: Transport Position
OPERATION 10.4 Transport Position To raise mower wings, drive the unit to a level area and retract the wing hydraulic cylinders. DO NOT raise wings with the mower positioned on an embankment or other inclined position to prevent overturning the mower. After the wings are fully raised, install transport lock braces to prevent wings from inadvertently falling.
Page 121: Driving The Tractor And Cutter
OPERATION 10.6 Driving the Tractor and Cutter Start off driving at a slow speed and gradually increase your speed while maintaining complete control of the tractor and mower. Moving slowly at first will also prevent the tractor from rearing up and loss of steering control.
Page 122: Crossing Ditches And Steep Inclines
OPERATION 10.7 Crossing Ditches and Steep Inclines When crossing ditches with steep banks or going up sharp inclines, it is possible that the main driveline inner profile will penetrate into the outer housing to its maximum depth until the assembly becomes solid (driveline is at its extreme shortest length).
Page 123: Operating The Tractor And Implement
OPERATION Inclines and ditches should be approached along a line which is at an angle as shown. This type of path will reduce the possibility of over-collapse of the driveline and resulting damage. If the gradient is so steep that such an approach increases the possibility of a tractor roll-over, select an alternate crossing path.
Page 124: Foreign Debris Hazards
OPERATION 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.
Page 125: Engaging The Power Take Off (Pto)
OPERATION Rotary 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 100 YARDS UNLESS: -Front and Rear Deflectors, Chain Guards, or Bands are installed and in good, workable condition;...
Page 126: Pto Rpm And Ground Speed
OPERATION 11.4 PTO RPM and Ground Speed Ground speed for mowing will depend upon the height, type, and density of vegetation to be cut. Recommended speed for efficient mower performance is between 2 and 5 mph(3-8 kph). Operate the mower at its full rated PTO speed to maintain blade speed for a clean cut.
Page 127 OPERATION 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.
Page 128 OPERATION When you get to the end of a pass, slightly raise the mower (2-4”) before turning. Never raise the mower entirely while the blades are turning. If the mower must be raised higher than 12” from ground level, disengage the tractor PTO and wait for all mower rotation to come to a complete stop before proceeding to raise the mower.
Page 129 OPERATION When mowing across uneven areas such as road shoulders, ditch edges, and other uneven terrain, position mower so that one support wheel is near the highest point to prevent blades from cutting into gravel or dirt which can cause rapid blade wear and extremely severe shock loads on the drivetrain resulting in rapid wear or damage to these components.
Page 130: Shutting Down The Implement
OPERATION 11.6 Shutting Down the Implement To shut down attached mower head, first bring the tractor to a complete stop. Decrease engine RPM to idle then disengage cutterhead. The mower head will come to a complete stop within a suitable amount of time.
Page 131 OPERATION When disconnecting the mower the tractor should be completely shut down and secured in position. Relieve hydraulic pressure by moving the control levers back and forth several times. Lower the parking jack and raise the mower until the tongue clevis is no longer resting on the tractor drawbar and is supported solely by the jack.
Page 132: Mower Storage
OPERATION 13. MOWER STORAGE It is recommended that the mower be stored with the center section and both wings fully lowered to ground level. If the mower is stored with the wings in the raised position, select a level area and install wing transport braces to prevent the wings from falling BEFORE disconnecting the mower hitch from the tractor.
Page 133 OPERATION Never allow children or other persons to ride on the Tractor or Implement. Falling off can result in serious injury or death. (SG-10) Before transporting the tractor and mower, idle the tractor engine, disengage the PTO and wait for all mower moving parts to come to a complete stop.
Page 134: Tire And Wheels
OPERATION 14.1 Tire and Wheels Laminated Sectional Tires are designed for conditions where puncture proof performance is required and the mower will not be transported for long distances on roadways. Transport speed for laminated tires should not exceed 20 MPH. Excessive speed can cause damage to the machine and tire sections. Laminated tires must be installed such that the rubber segments lay with the ground.
Page 135: Transporting On Public Roadways
OPERATION 14.2 Transporting on Public Roadways Extreme caution should be used when transporting the tractor and mower on public roadways. The tractor must be equipped with all required safety warning features including a SMV emblem and flashing warning lights to alert drivers of the tractor’s presence. Remember that roadways are primarily designed for automotive drivers and most drivers will not be looking out for you, therefore, you must look out for them.
Page 136 OPERATION Make sure that all tractor flashing warning lights, headlights, and brake/tail lights are functioning properly before proceeding onto public roads. While newer model tractors have plenty of lighting to provide warning signals and operating lighting, most older models are only equipped with operating lights. Consult an authorized tractor dealer for lighting kits and modifications available to upgrade the lighting on older tractor models.
Page 137: Hauling The Tractor And Implement
OPERATION 14.3 Hauling the Tractor and Implement Before transporting a loaded tractor and implement, measure the height and width dimensions and gross weight of the complete loaded unit. Ensure that the load will be in compliance with the legal limits set for the areas that will be traveled through.
Page 138: Trouble Shooting Guide
OPERATION 15. TROUBLE SHOOTING GUIDE Problem Possible Cause Remedy Excessive Vibrations Check Gear box bolts. Tighten if loose. Check For loose nuts on Tighten If loose bladeholder and blades Check for bent output shaft. Replace shaft if bent. If shaft is bent oil will normally. leak from the bottom seal.
Page 139 OPERATION Oil on facings. Replace facings. Friction facings glazed. Clean with emery cloth. Blade Wears Too Fast Cutting in sandy conditions. Increase cutting height. Cutting in rocky conditions. Increase cutting height. Soft "will fit" blades. Use genuine Rhino HT blades. Hydraulic Cylinder Will Not Op.
Page 142: Lubrication
MAINTENANCE Before operating your Rotary Cutter, make sure it is properly lubricated and thoroughly inspected. Only a minimum of time and effort is required to regularly lubricate and maintain this machine to provide long life and trouble free operation. Always disengage the PTO before raising the Rotary Cutter for transporting or making adjustments.
Page 144: Tongue
MAINTENANCE Tongue The Tongue Hitch Pins attach the Tongue to the Center Section and should be checked for signs of wear or cracking. Replace as needed. The Drawbar 1” bolt fastens the cutter to the tractor Drawbar. When the cutter is unhitched and this 1”...
Page 145: Divider Gearbox
MAINTENANCE DIVIDER GEARBOX The filler pressure relief Dipstick Plug is on top of the Gearbox. Mnt-R-0005. Do not over-fill. If Gearboxes are filled above proper, pressure under working conditions may cause the Grease Seals to leak. Recommended lubricant for all gearboxes is Multi-Purpose Gear Oil P/N 00786250. Many of the equipment components are HEAVY (70 lbs or greater) and Special Lifting Procedures are recommended.
Page 146: Drivelines
MAINTENANCE DRIVELINES The Drivelines and U-Joints should be inspected each morning before the mower is started. Many of the equipment components are HEAVY (70 lbs or greater) and Special Lifting Procedures are recommended. Use lifting assistance such as mechanical assistance, two people, and proper lifting techniques when connecting or installing the driveshaft to reduce the possibility of back injuries.
Page 147: Main Cv Driveline Shield Service Instructions
MAINTENANCE MAIN CV DRIVELINE SHIELD SERVICE INSTRUCTIONS Clean and grease bushing groove before the bushing is placed in the groove. Grease any remaining bushings in guard. Slide guard half over driveline and insert bushing tabs into the openings in the guard. Turn the bushing until it engages into the guard.
Page 148: To Disassemble Universal Joint
MAINTENANCE TO DISASSEMBLE UNIVERSAL JOINT Remove all snap rings. Position joint in loose vice, strike top arm of unsupported yoke to drive the top cup up. Repeat on opposite side. If you cannot grip the loosened cap per Step 4, use a pointed tool to tip a needle them repeat Step 2.
Page 149: To Reassemble Universal Joint
MAINTENANCE TO REASSEMBLE UNIVERSAL JOINT Smear grease into bearings and check for dirt. CAUTION! Make sure all needle bearings are seated properly. Insert cup and cross. Drive in with spacer. Insert snap ring Insert second cup and hold cross into cup. Drive cup flush with arm.
Page 150 MAINTENANCE Drive cup down with spacer and insert snap ring To loosen cross, strike yoke arm and check cross for free rotation Position second yoke on cross. Repeat Steps 2 to 6. Grease Kit after assembly is completed. FN20/FN14 NITRO 02/10 Maintenance Section 5-10 ©...
Page 151: Disassembly - Cross And Bearing Kit
MAINTENANCE DISASSEMBLY - CROSS AND BEARING KIT The implement driveline has been removed from machine, halves separated, and the guards removed. Start the procedure by removing the yoke that does not have a shaft attached. The bearing cups are held in the center housing by snap rings.
Page 152 MAINTENANCE Note the orientation of all grease fittings before removing any yokes or crosses. Remove the end yoke from the center housing. Repeat steps 2 - 6 to remove the shaft yoke and cross from the center housing. Use the hammer and the driver to remove the two bearing cups from the center housing.
Page 153: Inspection
MAINTENANCE INSPECTION Discard the two crosses, all of the bearing cups, and all of the snap rings. Clean the bores in the center housing and the yokes. Inspect the bores for damage. Replace any parts that are damaged. Clean the snap ring grooves in the bores that have them.
Page 154: Assembly
MAINTENANCE ASSEMBLY Apply grease to the bearing cup bores in the end yoke, the shaft yoke, and the center housing. The grease will make the bearing cups much easier to install. Install the grease fittings in the crosses. Align the grease fitting with the correct trunnions.
Page 155 MAINTENANCE Put the shaft yoke into the vise so the bearing cups are square with the jaws of the vise. Make sure the trunnion is aligned with the baring cups. Tighten the vise until both bearing cups are flush with the yoke. Figure MntP-R-0141 Using the large driver used in disassembly, drive one of the bearing cups into the yoke...
Page 156 MAINTENANCE Use the cross trunnion as a pilot. Start the new bearing cup on the cross and into the opening in the center housing. Push the cross into the bearing cup while driving the trunnions of the cross parallel with the openings for the bearing cups.
Page 157: Blade Servicing
MAINTENANCE BLADE SERVICING Inspect blades before each use to determine that they are properly installed and in good condition. Replace any blade that is bent, excessively nicked, worn, or has any other damage. Small nicks can be ground out when sharpening. Use only original equipment blades on this cutter.
Page 158: Blade Sharpening
MAINTENANCE BLADE SHARPENING Always sharpen both blades at same time to maintain balance. Follow original sharpening pattern as shown in FIGURE Mnt-R-0008. Always sharpen blades by grinding. DO NOT heat and pound out edge. Do not sharpen blade to a razor edge, but leave a 1/16" blunt edge. Do not sharpen back side of blade. IMPORTANT: When sharpening blades, grind each blade the same amount to maintain balance.
Page 159: Blade Carrier Inspection
MAINTENANCE BLADE CARRIER INSPECTION Blade bolt fit into carrier bushings should be checked every time blades are changed. The blade bolt should fit into carrier bushings as a snug slip fit. If the blade bolt fit appears to be loose or sloppy, measure the square hole in bushing.
Page 160: Blade Carrier Installation
MAINTENANCE BLADE CARRIER INSTALLATION Clean the taper and keyway on both the blade carrier and output shaft. Position carrier on the gear box output shaft and install flat washer and 1" hex nut. Tighten the nut holding the blade carrier to minimum 600 ft. pounds.
Page 161: Torque Limiter Repair Procedure
MAINTENANCE Return the bolts to their original position as described in (b) above. NOTE: If machine sits outside longer than 30 days and is exposed to rain and humid air, the Torque Limiter should be removed from machine and stored in a dry area. Torque Limiter facings will soak up moisture and cause the metal plates to rust badly.
Page 162 MAINTENANCE Reinstall washer #15 and castle nut #14. CAUTION: Do not tighten nut #14. Tighten only enough to remove play between the yoke, washer #15, and nut #14. Install cotter pin. FN20/FN14 NITRO 02/10 Maintenance Section 5-22 © 2010 Alamo Group Inc.
Page 163: Gearbox Arrangements (Secondary Gearboxes)
MAINTENANCE GEARBOX ARRANGEMENTS (Secondary Gearboxes) All Three secondary Gearboxes have the same identical parts in them for 540 or 1000 RPM and for the left, center, or right sections. To change Gearbox from 540 to 1000 RPM, the Gear (#1) and Pinion (#2) must be reversed.
Page 164: Hydraulic Hoses
MAINTENANCE HYDRAULIC HOSES Replace pinched and broken Hydraulic Hoses at once. Tighten any Hydraulic Fitting with fluid leaking from it. If fluid still leaks, loosen the fitting, apply a pipe thread compound to the threads and tighten. Care must be exercised when tightening Hydraulic Fittings.
Page 165: Proper Torque For Fasteners
MAINTENANCE PROPER TORQUE FOR FASTENERS The chart lists the correct tightening torque for fasteners. When bolts are to be tightened or replaced, refer to this chart to determine the grade of bolts and the proper torque except when specific torque values are assigned in manual text.
Page 166 RHINO LIMITED WARRANTY LIMITED WARRANTIES 1.01. Servis-Rhino warrants for one year from the purchase date to the original non-commercial, governmental, or municipal purchaser (“Purchaser”) and warrants for six months to the original commercial or industrial purchaser (“Purchaser”) that the goods purchased are free from defects in material or workmanship.
Page 167 TO THE OWNER/OPERATOR/DEALER In addition to the standard Limited Warranty shown on the facing page, Rhino also provides: 1. A FIVE-YEAR (60 months) LIMITED WARRANTY* on GEARBOX components provided they have been properly maintained† and have not been subjected to abuse or mis-use except as limited below. * WARRANTY LIMITATIONS - GEARBOX A.
Page 168 FN20/FN14 NITRO HEAVY-DUTY FLEX WING ROTARY CUTTER FN20/FN14-SOM-02/10 P/N 00778645C Printed U.S.A...

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