Bush Hog HDTH5 Operator's Manual
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Bush Hog HDTH5 Operator's Manual

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MODELS
HDTH5 & HDTH6
REAR DISCHARGE
FINISH MOWERS
PUBLISHED 08/21
PART NO. 50078297
© 2021 Alamo Group Inc.

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  • Page 1 MODELS HDTH5 & HDTH6 REAR DISCHARGE FINISH MOWERS PUBLISHED 08/21 PART NO. 50078297 © 2021 Alamo Group Inc.
  • Page 5 SERIAL NUMBER LOCATION...
  • Page 7 TABLE OF CONTENTS SAFETY SECTION 1 General Safety Instructions and Practices ......................1-1 Operator Safety Instructions and Practices......................1-2 Connecting or Disconnecting Implement Safety Instructions and Practices ............1-3 Crushing Hazards..............................1-4 Thrown Objects Hazards ..........................1-5 &1-6 Run Over Hazards...............................1-7 PTO EntanglementHazards..........................1-8 Mower Blade Contact Hazards..........................1-9 Electrical & Fire Hazards...........................1-10 Transporting Hazards ............................1-11 Maintenance Hazards ............................1-12 Parts Information ...............................1-13...

  • Page 8: Table Of Contents

    TABLE OF CONTENTS - CONTINUED OPERATION SECTION 4 (Continued) Driving the Tractor and Implement......................4-14 - 4-22 Disconnecting the Mower From the Tractor ......................4-22 Mower Storage ..............................4-23 Transporting the Tractor and Implement ......................4-23 Transporting on Public Roadways ......................4-24 - 4-25 Hauling Tractor and Implement .........................4-26 Trouble Shooting.............................4-27 - 4-28 MAINTENANCE SECTION 5 Lubrication (LUBRICATION POINTS LOCATIONS)....................5-1...
  • Page 9 SAFETY SECTION...
  • Page 11 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 12 SAFETY OPERATOR SAFETY Safety Section 1-2 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 13 SAFETY CONNECTION OR DISCONNECTING IMPLEMENT SAFETY HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-3 © 2021 Alamo Group Inc.
  • Page 14 SAFETY CRUSHING HAZARDS Safety Section 1-4 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 15 SAFETY THROWN OBJECTS HAZARDS HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-5 © 2021 Alamo Group Inc.
  • Page 16 SAFETY THROWN OBJECTS HAZARDS (CONTINUED) Safety Section 1-6 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 17 SAFETY RUN OVER HAZARDS HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-7 © 2021 Alamo Group Inc.
  • Page 18 SAFETY PTO ENTANGLEMENT HAZARDS Safety Section 1-8 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 19 SAFETY MOWER BLADE CONTACT HAZARDS HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-9 © 2021 Alamo Group Inc.
  • Page 20 SAFETY ELECTRICAL & FIRE HAZARDS Safety Section 1-10 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 21 SAFETY TRANSPORTING HAZARDS HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-11 © 2021 Alamo Group Inc.
  • Page 22 SAFETY HAZARDS WITH MAINTENANCE OF IMPLEMENT Safety Section 1-12 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 23 SAFETY HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-13 © 2021 Alamo Group Inc.
  • Page 24 SAFETY Under Under Shield Shield Under Under Shield Shield 1& Under Shield Safety Section 1-14 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 25 Warning Decal, Pinch Point Hazard D850 Danger Decal, Entanglement Hazard 50038320 Belt Installation Decal 12 50074259 Made in America Decal 13 50065309 Bush Hog Logo Decal 14 50081814 Model Decal HDTH5 50081815 Model Decal HDTH6 15 50081684 Bush Hog Logo Decal 16 50035829...
  • Page 26 SAFETY DANGER D418 D418 KEEP AWAY BLADE CONTACT CAN CAUSE DEATH OR SERIOUS INJURY D646 D546 Safety Section 1-16 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 27 SAFETY D708 D850 HDTH 5 & 6 Finish Mower 08/21 Safety Section 1-17 © 2021 Alamo Group Inc.
  • Page 28 SAFETY D852 D559 D641 Safety Section 1-18 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 29 SAFETY DANGER TO AVOID DEATH OR SERIOUS INJURY FROM DRIVELINE CONTACT, DRIVELINE SEPARATION OR PTO STUB SHAFT FAILURE: STOP, LOOK and LISTEN for rotating motion before approaching implement. STAY AWAY and KEEP hands, feet and body AWAY from driveline & rotating parts until all moving elements have stopped.
  • Page 30 SAFETY D855 WARNING Crushing Hazard To avoid injury from Shipping D454 mower falling over: Bracket DO NOT store mower vertically on shipping brackets. Store mower lying down. D454 Safety Section 1-20 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 31 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.
  • Page 33 Contents Acknowledgment ......2 Foreword ........2 Safety Alerts.

  • Page 34: Safety Alerts

    Safety Alerts Symbol Signal Words This Safety Alert Symbol means: “ATTENTION! Signal words are distinctive words that will typically be STAY ALERT! YOUR SAFETY IS INVOLVED!” found on safety signs on the mower and other worksite equipment. These words may also be found in this The Safety Alert Symbol identifi es important safety manual and the manufacturer’s manuals.

  • Page 35: The Industrial/Agricultural Mower

    The Industrial/Agricultural Mower Industrial/Agricultural Mower Types Mowers are used for pasture clipping, crop residue shredding, heavy brush cutting, waterways, right-of- Flail ways, roadside or highway mowing. Also, these mowers are used for cutting grass and other growth in public areas such as parks and cemeteries. Boom Rotary Sickle Bar...

  • Page 36: Follow A Safety Program

    Follow A Safety Program Protect Yourself Wear personal protective clothing and Personal Protective Equipment (PPE) issued to you or called for by job conditions. You must ALWAYS wear safety glasses with side shields. You may also need: — Hard hat —...
  • Page 37 Follow A Safety Program Avoid Injury From Raised Equipment Avoid Injury From High Pressure Fluid Avoid possible crushing injury from falling mower or Avoid fl uid injection injury due to high pressure fl uid leaks. other raised equipment. High Pressure Fluid Can Inject into the Body Avoid Crushing –...
  • Page 38 Follow A Safety Program Be Alert! For Safe Operation Know where to get assistance. Know how to use a fi rst You must be a qualifi ed and authorized operator for aid kit and fi re extinguisher/fi re suppression system. proper operation of your machine.
  • Page 39 Follow A Safety Program Some Rules You Must Work By (continued) Keep — Only qualifi ed and authorized individuals may operate Children this equipment. Away from — Never allow children to play on, ride on or operate Equipment the equipment. Children are not qualifi ed to operate this equipment.

  • Page 40: Prepare For Safe Operation

    Prepare For Safe Operation Check The Mower And Tractor Equipment Before beginning your work day inspect the machine Walk-Around and have all systems in good operational condition. Inspection WARNING! Prevent possible crushing injury from falling equipment. Hydraulic system or part failure could cause unsupported equipment to fall.
  • Page 41 Prepare For Safe Operation Know The Work Area Correct unsafe conditions. Do not operate in problem areas where debris and obstacles cannot be removed Before you operate the mower thoroughly inspect or marked. the work area. Walk around the area and inspect the Analyze mowing area to determine: surfaces you will travel on when using the mower.
  • Page 42 Prepare For Safe Operation Tractor And Mower Controls Safety Test — Raise and lower mower to check for driveline bottoming out or engagement problems. Start the tractor following the specifi c procedures in the — Check the equipment for excessive vibration and manufacturer’s operator’s manual.
  • Page 43 Prepare For Safe Operation Hitching Mower To Tractor Read and Three-point hitch-mounted mowers: Understand Manuals Before — Refer to mower and tractor manufacturers’ manuals. Operating — Place tractor’s hydraulic power lift (rockshaft) selector lever in down position to avoid unexpected movement.

  • Page 44: Start Safely

    Start Safely Make The Right Start Mow only in daylight or good artifi cial light conditions. Rotating Blades – Avoid serious injury or death from mower-thrown Keep Away objects or blade contact: — Keep chain shields, fl exible or solid defl ector shields or discharge chutes in place and in good repair.
  • Page 45 Operate Safely Mower-Thrown Objects (continued) Disc Mowers — When using a disc mower it is Do Not Mow important to know the area to be mowed. If the operator in Reverse has mowed the fi eld before and is familiar with all obstacles that may be present, it is suffi cient to watch ahead of the mower path for any additional objects that may have entered the fi eld.
  • Page 46 Operate Safely Under Mount Mower Safety Practices When mowing with an under mount mower: Never Stand — Keep removable discharge chute in place and over on Mower – Keep Away discharge opening. — Never stand on a mower housing when the tractor engine is operating.
  • Page 47 Operate Safely Wing And Side Mount Mowers Safety Practices 300 ft (92 m) Raised wing positions reduce shielding protection and Keep Bystanders increases the thrown object and blade contact hazard Away from risks. Mowing Area Avoid possible serious injury or death by thrown objects or blade contact from raising and lowering wings during mowing operations: —...
  • Page 48 Operate Safely Uneven Terrain Mowing Safety Practices (continued) Maintain — Use extreme care to maintain control over the Control, Use Low equipment when operating in these conditions. Speeds — Increase tractor stability by adding wheel weights, ballast and increasing wheel spacing to maximum. Refer to operator’s manual for recommendations.

  • Page 49: Park Safely

    Park Safely Parking Safety Practices — Use designated or out-of-traffi c areas. — Use fi rm level ground locations. Parking Brake — Set parking brake. — Lower raised equipment to ground. Shut down the mower and tractor using proper equipment shut down practice before dismounting tractor.

  • Page 50: Perform Maintenance Safely

    Shut Down Safely Dismounting Properly — Never dismount from moving equipment. Wait for — Never jump from any machines. Moving Parts to Stop — Dismount carefully. — Check for slippery steps. — Keep feet and hands away from controls. — Use handholds and steps during dismount. —...
  • Page 51 Perform Maintenance Safely Prepare Yourself Wear personal protective clothing and Personal Protective Equipment (PPE) issued to you or called for by job conditions. You must ALWAYS wear safety glasses with side shields. You may also need: — Hard hat — Safety shoes —...
  • Page 52 Perform Maintenance Safely Prepare The Machine — Securely support, block up, or lock up mower wings with approved locking devices before working near or Stored energy sources (electrical, mechanical, hydraulic, underneath a wing mower. pneumatic, chemical, thermal, etc.) must be controlled —...
  • Page 53 Perform Maintenance Safely Perform Maintenance Safely Use Proper Ventilation Make sure the hoists or jacks you use are in good repair. Never use jacks with cracked, bent, or twisted parts. If it is necessary to run an engine in an enclosed area, Never use frayed, twisted or pinched cables.
  • Page 54 Perform Maintenance Safely Hydraulic System Hazards When venting or fi lling the hydraulic system, loosen the fi ller cap slowly and remove it gradually. The hydraulic system is under pressure whenever the Never reset any relief valve in the hydraulic system to a engine is operating and may hold pressure even after the pressure higher than recommended by the manufacturer.
  • Page 55 Perform Maintenance Safely Avoid Explosion — Observe the polarity of the batteries and connections. — Make the fi nal cable connection to the engine or the WARNING! Avoid possible serious injury from furthest ground point away from the battery. Never explosion.
  • Page 56 Perform Maintenance Safely Tire And Wheel Maintenance (continued) Never cut or weld on a wheel with an infl ated tire mounted on it. This could cause explosive WARNING! The types of wheels and tires usually decompression. found on this equipment require special care when Check that the tire size and wheel are correctly matched.

  • Page 57: Final Word To The User

    Perform Maintenance Safely Mower Blade Maintenance (continued) — Avoid bending blades. Help prevent mower blades from bending or cracking by avoiding contact with — How are mower blades made? solid objects. Mower blades are intended to cut Mower blades are made of high strength alloy spring grass, shrubs, woody vegetation, and small trees and steel.

  • Page 59: Reconocimiento

    Contenido Reconocimiento ....... 2 Introducción ........2 Alertas de seguridad .

  • Page 60: Alertas De Seguridad

    Alertas de seguridad Símbolo Palabras indicativas Este símbolo de alerta de seguridad signifi ca: Las palabras indicativas son palabras distintivas que “¡ATENCIÓN! ¡MANTÉNGASE ALERTA! ¡SU típicamente se encontrarán en letreros de seguridad SEGURIDAD ESTÁ EN RIESGO!” de la cortadora de césped y otros equipos del sitio de trabajo.

  • Page 61: Cortadora De Césped Industrial/Para Agricultura

    Cortadora de césped industrial/para agricultura Tipos de cortadora de césped industrial/para agricultura Las cortadoras de césped se usan para recortar pasturas, Triturador desmenuzar residuos de cultivos, cortar arbustos, realizar desbroce pesado, cortar la hierba en vías de agua, derechos de paso, costados de caminos o autopistas. Además, estas cortadoras se usan para cortar la hierba y otras plantas en zonas públicas como parques y cementerios.

  • Page 62: Cumplimiento Del Programa De Seguridad

    Cumplimiento del programa de seguridad Protéjase a sí mismo Use la ropa de protección personal y los equipos de protección personal (PPE) que se le proporcionen o que requieran las condiciones del trabajo. SIEMPRE debe usar gafas de seguridad con escudos laterales. Puede necesitar también: —...
  • Page 63 Cumplimiento del programa de seguridad Evite las lesiones provocadas por equipos elevados Si un fl uido se inyecta en la piel, debe ser extraído dentro de pocas horas por personal médico Evite posibles lesiones de aplastamiento por caídas de la familiarizado con este tipo de lesión.
  • Page 64 Cumplimiento del programa de seguridad ¡Manténgase alerta! Para una operación segura Sepa dónde obtener asistencia. Sepa cómo usar un Usted debe ser un operador cualifi cado y autorizado equipo de primeros auxilios y un extintor de incendios/ para operar la máquina correctamente. Debe comprender sistema de supresión de fuego.
  • Page 65 Cumplimiento del programa de seguridad Algunas reglas que debe cumplir al trabajar (continuación) Mantenga — Únicamente personas cualifi cadas y autorizadas a los niños alejados pueden manejar estos equipos. de los equipos — Nunca permita que los niños jueguen en los equipos, viajen en ellos o los hagan funcionar.

  • Page 66: Preparación Para Una Operación Segura

    Preparación para una operación segura Revise los equipos de la cortadora de césped y el marcadas; incluya los pernos y sujetadores de las hojas. Nunca enderece o suelde en las hojas. tractor — Asegúrese de que el escudo para objetos que son Antes de comenzar la jornada de trabajo, inspeccione la arrojados se encuentre correctamente instalado y en buen máquina y asegúrese de que todos los sistemas estén en...
  • Page 67 Preparación para una operación segura Familiarícese con la zona de trabajo Corrija las condiciones no seguras. No opere en áreas con problemas donde no se puedan retirar o marcar los Antes de hacer funcionar la cortadora de césped, residuos y los obstáculos. inspeccione cuidadosamente la zona de trabajo.
  • Page 68 Preparación para una operación segura Prueba de seguridad de los controles del tractor y de la cortadora de césped Use el ROPS Arranque el tractor siguiendo los procedimientos y el cinturón de seguridad específi cos del manual del operador del fabricante. Estos procedimientos normalmente incluyen: —...
  • Page 69 Preparación para una operación segura Enganche de la cortadora de césped al tractor Lea y asegúrese Cortadoras montadas en enganche de tres puntos: de comprender los — Consulte los manuales de los fabricantes de la manuales antes de comenzar la cortadora y del tractor.

  • Page 70: Arranque Con Seguridad

    Arranque con seguridad Cómo realizar un arranque correcto Corte la hierba únicamente con luz diurna o en condiciones de buena luz artifi cial. Hojas giratorias – Manténgase Evite lesiones graves o muerte producidas por objetos arrojados por la cortadora o por el contacto con las hojas: —...
  • Page 71 Operación con seguridad Objetos arrojados por la cortadora de césped Apague la TDF, espere que las hojas dejen de girar, eleve la cortadora y, después, retroceda. (continuación) Corte desplazándose en sentido de avance. Cortadoras de disco — Cuando se usa una cortadora de disco, es importante conocer la zona donde se va a cortar.
  • Page 72 Operación con seguridad Prácticas de seguridad para la cortadora de césped de montaje inferior Nunca se pare sobre la cortadora Cuando se traslada con una cortadora de césped de de césped – montaje inferior: Manténgase alejado — Mantenga la rampa de descarga extraíble en su lugar y por encima de la abertura de descarga.
  • Page 73 Operación con seguridad Prácticas de seguridad para cortadoras de 300 ft césped con laterales y montaje lateral (92 m) Mantenga a las personas ajenas Las posiciones elevadas de los laterales reducen la alejadas de la zona protección de los escudos y aumentan los riesgos de de corte objetos arrojados y contacto con las hojas.
  • Page 74 Operación con seguridad Prácticas de seguridad para trabajos de corte en terrenos desparejos (continuación) Mantenga — Use extremo cuidado para mantener el control de los el control, equipos cuando trabaja en estas condiciones. desplácese — Aumente la estabilidad del tractor agregando pesos o lastre en las ruedas y aumentando al máximo la separación entre las ruedas.

  • Page 75: Estacionamiento Seguro

    Estacionamiento seguro Prácticas de seguridad para el estacionamiento — Use las zonas designadas o alejadas del tránsito. Aplique el freno de — Use lugares con suelo fi rme y nivelado. estacionamiento — Aplique el freno de estacionamiento. — Descienda el equipo de la cortadora de césped hasta el suelo.

  • Page 76: Realización De Mantenimiento Con Seguridad

    Apagado con seguridad Descenso correcto — Nunca descienda de equipos en movimiento. Espere hasta que las — Nunca baje de una máquina saltando. piezas móviles se detengan — Descienda con cuidado. — Verifi que que no haya peldaños resbaladizos. — Mantenga los pies y las manos lejos de los controles. —...
  • Page 77 Realización de mantenimiento con seguridad Preparación personal Use la ropa de protección personal y los equipos de protección personal (PPE) que se le proporcionen o que requieran las condiciones del trabajo. SIEMPRE debe usar gafas de seguridad con escudos laterales. Puede necesitar también: —...
  • Page 78 Realización de mantenimiento con seguridad Preparación de la máquina Deben controlarse o reducirse las fuentes de energía Prepare los sistemas de la almacenada (eléctricas, mecánicas, hidráulicas, máquina para neumáticas, químicas, térmicas, etc.) al mínimo realizarles servicios practicable antes de realizar cualquier procedimiento de mantenimiento, reparación o servicio.
  • Page 79 Realización de mantenimiento con seguridad Use ventilación adecuada Si es necesario hacer funcionar un motor en una zona Retire la llave y cerrada, elimine del área las emanaciones de escape lea el manual de con una extensión del caño de escape. Si no tiene esa mantenimiento extensión, asegúrese de abrir las puertas y dejar entrar aire del exterior.
  • Page 80 Realización de mantenimiento con seguridad Riesgos del sistema hidráulico Cuando ventila o llena el sistema hidráulico, afl oje la tapa de llenado con lentitud y retírela gradualmente. El sistema hidráulico se encuentra bajo presión siempre Nunca restablezca una válvula de alivio del sistema que el motor está...
  • Page 81 Realización de mantenimiento con seguridad Evite explosiones — Asegúrese de que las máquinas no se estén tocando. — Observe la polaridad de las baterías y conexiones. ¡ADVERTENCIA! Evite posibles lesiones graves por — Realice la conexión fi nal de cable al motor o al punto explosiones.
  • Page 82 Realización de mantenimiento con seguridad Mantenimiento de neumáticos y ruedas (continuación) Evite la explosión ¡ADVERTENCIA! Los tipos de ruedas y neumáticos de los neumáticos que generalmente se encuentran en estos equipos requieren cuidados especiales al realizar servicios para evitar lesiones graves o la muerte. No infl e los neumáticos por encima de la presión No infl e neumáticos con gases infl amables o con sistemas recomendada.

  • Page 83: Palabras Fi Nales Para El Usuario

    Realización de mantenimiento con seguridad Mantenimiento de las hojas de la cortadora — Evite doblar las hojas. Contribuya a prevenir que las hojas de la cortadora se doblen o rajen evitando el (continuación) contacto con objetos sólidos. Las hojas de la cortadora —...
  • Page 85 INTRODUCTION SECTION...
  • Page 87 INTRODUCTION We are pleased to have you as a Bush Hog customer. Your HDTH Series Rotary Cutter has been carefully designed to give maximum service with minimum down time.This manual is pro- vided to give you the necessary operating and maintenance instructions for keeping your rotary cutter in top operating condition.
  • Page 88 Power from the tractor is transmitted through a telescoping driveline to the gearbox. It is then passed to the spindle housings by a single, B-section, Aramid Cord reinforced belt. Drivetrain protection is provided by belt slippage. EQUIPMENT SPECIFICATIONS HDTH5 & HDTH6 Description Model HDTH5 Model HDTH6 Cutting Width..........60”..............72"...
  • Page 89 INTRODUCTION HDTH 5 & 6 Finish Mower 08/21 Introduction Section 2-3 © 2021 Alamo Group Inc.
  • Page 90 INTRODUCTION Introduction Section 2-4 HDTH 5 & 6 Finish Mower 08/21 © 2021 Alamo Group Inc.
  • Page 91 ASSEMBLY SECTION...
  • Page 93 ASSEMBLY DEALER SETUP INSTRUCTIONS The mower as received from the factory is partially assembled and requires minimum time to complete assembly and is ready for sale. This mower is shipped vertically with shipping brackets. These shipping brackets are intended for use in trans- porting the mower from the factory to dealer.
  • Page 94 ASSEMBLY NOTICE! The HDTH5 and HDTH6 Gearboxes are shipped WITHOUT OIL in the Gearboxes and must be filled before connecting to the tractor and placing in operation! USE 85W / 90 GEAR OIL Oil Filler/Vent Plug Fill Check Plug OIL FILL PROCEDURE DO NOT OVER FILL GEARBOXES.
  • Page 95 ASSEMBLY The HDTH models are shipped from the factory partially assembled on shipping stands allowing the machine to be shipped in a vertical position. The shipping stands attached to the front of the machines must be removed prior to the assembly process. Do not attempt to remove the shipping stands with the machine in the vertical position.
  • Page 96 ASSEMBLY Refer to FLEX LINK Figure 3-2 Setup Instructions. HDTH Assembly Diagram 1&1*1( Detail “A” Cotter Pin ” x 1” ⁄ 3 2 ” 1* Flatwasher ⁄ Mast t Driveline Holder 1& ASSEMBLING THE HDTH (Figure 3-2) 1. Install the Lift Arms into the pockets at the front of the machine. Install the category 1 lift pin in the front hole in the lift arms and secure with the 7/8”...
  • Page 97 ASSEMBLY FLEX LINK SETUP Standard 3 Pt Lift (Figure 3-3) For standard 3 pt. lift attachment to tractor the Flex Link is attached to the mast in the upper holes just under the Mast Struts. Refer to Figure 3-3. 1. Place a Pivot Bushing through the rear holes of the Flex Link and install between the Mast uprights aligning the Bushing in the Flex Link with the holes in the Mast.
  • Page 98 ASSEMBLY FLEX LINK SETUP (continued) Quick Hitch 3 Pt Lift (Figure 3-4) For Quick Hitch pt. lift attachment to tractor the Flex Link is attached to the Mast in the lower holes of the Mast Struts. Refer to Figure 3-4. 1. Before assembling the Flex Link to the Mast the Extension Spring should be installed to the Pivot Bushing.
  • Page 99 ASSEMBLY LIFT PINS Lift Pins 3 Pt Lift (Figure 3-5) For Standard pt. lift attachment to tractor the Cat.I Lift Pins attach to the Lift Arms using 7/8” lockwashers and 7/8” hex nuts. Category II Adaptor Bushings (1-7/8” long x 1-7/16” diameter) are supplied in the Bag of Parts. These Adaptor Bushings are used on the Category I lift pins when attaching the machine to a tractor with Category II lift arms and when attaching the machine to a tractor equipped with a Quick Hitch system.
  • Page 100 ASSEMBLY CASTER WHEELS (Figure 3-6) The Caster Wheels are shipped in the inverted position from the factory and must be placed in the correct operating position for final assembly. 1. Raise and support the front of the mower enough so the Casters may be placed through the pivot tubes on the wheel mounts from the underside.
  • Page 101 ASSEMBLY DRIVELINE ATTACHMENT (Figure 3-7) The Driveline Supplied with the HDTH Series Finish Mowers are ASAE size 3 with 1-3/8”- 6 spline yokes.The im- plement yoke may have a locking push pin or a locking collar for the driveline to lock to the implement gearbox shaft.
  • Page 102 ASSEMBLY FRONT ROLLER KIT ASSEMBLY (OPTIONAL) (Figure 3-8) 1. Attach the Roller Mounting Brackets to the front of the deck using four 3/8” x 1-1/4” bolts, 3/8” flatwashers, 3/8” Lockwashers and 3/8” hex nuts as shown in (Figure 3-8) below. 2. Attach the Roller and Sleeve with the 1/2” x 6-1/2” bolt, two 3/4” flatwashers, and the 1/2” hex nut as shown in (Figure 3-8) below.

  • Page 103: Operation Section 4 (Continued)

    OPERATION SECTION...
  • Page 105 UAL 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 Bush Hog Dealer for a full explanation. Pay close attention to all safety signs and safety messages contained in this manual and those affixed to the imple- ment and tractor.
  • Page 106 OPERATION 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 107 -Minimum ........15HP - HDTH5, 20HP - HDTH6 -Maximum........35HP - HDTH5, 40HP - HDTH6 • Hitch -Lift Type Mower: -Lifting Capacity ......Lift - 650 lbs. - HDTH5 ......Lift - 740 lbs. - HDTH6 • Front End Weight......... As needed to maintain 20% weight on front axle •...
  • Page 108 Tractor 3-Point Lift The tractor 3-point hitch must be rated to lift at least 675 lbs if attaching a HDTH5, 740 lbs if attaching a HDTH6. The mower is designed to be mounted on tractors with a CAT I or Quick Attach Hitch. Refer to the tractor operator’s manual for the category of the tractor being used.
  • Page 109 OPERATION Power Take Off (PTO) NOTE: These mowers are designed for 540 RPM (PTO) speeds only. Depending on the unit, the mower is designed to operate at a PTO speed of 540 or 1000 RPM. Most tractors operate at either 540, or a combination of 540 and 1000 RPM PTO speeds. The operating speed of the mower and tractor can be determined by the number of splines on the driveline yoke and PTO output shaft.
  • Page 110 OPERATION GETTING ON AND OFF THE TRACTOR Before getting onto the tractor, the operator must read and completely understand the implement and tractor operator manuals. If any part of either manual is not completely understood, consult an authorized dealer for a complete explanation. OPS-U- 0007 Do not mount or dismount the Tractor while the tractor is moving.
  • Page 111 OPERATION 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 112 OPERATION Connecting the Mower (Figure 4-2) (Figure 4-2) Make sure the tractor is equipped with the correct PTO shaft. Change shafts if needed. Shorten or remove the tractor drawbar to avoid in- terference when raising and lowering the mower. Board the tractor and start the engine. Position the tractor to the mower with the 3-point lift arms posi- tioned at the same height and to the outside of the mower hitch pins.
  • Page 113 OPERATION Driveline Length Modification 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 hous- ing 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 114 OPERATION SETTING THE MOWER Properly setting the cutting height is essential for efficient and safe operation. A properly set mower will make a more uniform cut, distribute clippings more evenly, require minimal tractor work, and follow the contour of uneven terrain. NOTE: Avoid very low cutting heights, striking the ground with the blades gives the most damaging shock loads and will cause damage to the mower and drive.
  • Page 115 OPERATION PRE-OPERATION INSPECTION AND SERVICE Before each use, a pre-operation inspection and service of the implement and tractor must be performed. This includes routine maintenance and scheduled lubrication, inspecting that all safety devices are equipped and functional, and performing needed repairs. DO NOT operate the unit if the pre-operation inspection reveals any condition affecting safe operation.
  • Page 116 OPERATION Mower Pre-Operation Inspection/Service Before each mower use, a complete inspection and service is required to ensure the mower is in a good and safe working condition. Damaged and/or broken parts should be repaired and/or replaced immediately. To ensure the mower is ready for operation, conduct the following.
  • Page 117 OPERATION Gearbox Vent • Inspect the gearbox oil level. A low oil level is a warning Plug sign that the gearbox may be cracked or its seal is Oil Level damaged and needs replacement. Check Plug • Ensure the gearbox vent is in place and free from clogs.

  • Page 118: Driving The Tractor And Implement

    OPERATION DRIVING THE TRACTOR AND IMPLEMENT Safe tractor transport requires the operator possess a thorough knowledge of the model being operated and precau- tions 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 OPERATION 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 con- trol lever is in the lowered position and the PTO is disen- gaged before starting the tractor.
  • Page 120 OPERATION Raising the Mower Using the tractor 3-point hitch control lever, raise the mower off the ground about 6”, or just high enough to clear any ground obstacles. When raising the mower, make sure all connection points are securely attached and at least 1”...
  • Page 121 OPERATION Damage resulting from over-collapse of the driveline’s inner profile and its outer housing may allow the driveline to come loose from the Tractor which could cause bodily injury to the operator or bystanders and/or extensive damage to the Tractor or Implement. OPS-R-0020 When confronted with an incline or ditch, do not approach from an angle which is perpendicular or straight on as damaged to over collapse of the driveline may occur.
  • Page 122 OPERATION OPERATING THE TRACTOR AND IMPLEMENT THE OPERATOR MUST COMPLETELY UNDERSTAND HOW TO OPERATE THE TRACTOR AND IMPLEMENT AND ALL CONTROLS BEFORE ATTEMPTING TO OPERATE. The operator must read and understand the Safety and Operation Sections of the implement and tractor operator’s manuals. These manuals must be read and explained to any operator who cannot read.
  • Page 123 OPERATION Bystanders/Passersby Precautions 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. If a bystander comes within 300 feet of the tractor while the mower is being operated, stop the tractor at once, idle the engine and disengage the PTO.
  • Page 124 OPERATION 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 125 OPERATION 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. ●...

  • Page 126: Disconnecting The Mower From The Tractor

    OPERATION Shutting Down the Mower To shut down the mower operation: 1. Bring the tractor to a complete stop on a level surface. 2. Decrease the engine speed (RPM) to idle. 3. Place the transmission in park or neutral and apply the parking brake. 4.

  • Page 127: Mower Storage

    OPERATION MOWER STORAGE Properly preparing and storing the mower at the end of the season is critical to maintaining its appearance and to help ensure years of dependable service. The following are suggested storage procedures: • Thoroughly clean all debris off the mower to prevent damage from rotting grass and standing water. •...

  • Page 128: Transporting On Public Roadways

    OPERATION If the tractor’s hydraulic pump is not independent of the tractor PTO, or if the tractor PTO has to be run to have hydraulic power, disconnect the mower driveline from the tractor PTO output shaft. Secure the driveline to the mower deck to prevent driveline damage or loss during transport OPS-R-0034...
  • Page 129 OPERATION 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) The SMV (Slow Moving Vehicle) emblem is the universal symbol used to alert drivers of the presence of equipment traveling on road- ways at a slow speed.

  • Page 130: Hauling Tractor And Implement

    OPERATION Hauling the Tractor and Implement Before transporting a loaded tractor and implement, meas- ure the height and width dimensions and gross weight of the complete loaded unit. Ensure that the load will be in compli- ance with the legal limits set for the areas that will be trav- eled through.

  • Page 131: Trouble Shooting

    Belt Slipping Tighten or replace with special Bush Hog belt Grass wet Allow grass to dry before mowing. Slow ground speed of tractor but keep engine running at full PTO rpm.
  • Page 132 OPERATION TROUBLE SHOOTING GUIDE Problem Possible Cause Remedy FRAYED EDGES ON COVER Belt misaligned or belt rubbing Re-align belt or guide. Be sure belt guide. doesn’t rub any other part while running. Pulley misalignment. inspect to ensure belt is running in center of backside idler. Shim idler as necessary to align.

  • Page 133: Maintenance Section

    MAINTENANCE  SECTION...

  • Page 135: Lubrication (Lubrication Points Locations)

    MAINTENANCE Before operating your Finishing Mower, 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. Lubrication Do not let excess grease collect on or around parts, particularly when operating in sandy areas.

  • Page 136: Gearbox Maintenance

    MAINTENANCE Gearbox Maintenance The first oil change must be done after 50 hours of working time and then after 400-500 hours of work. Keep in mind that intense and continuous working conditions will necessitate more frequent oil changes and periodic checks. It is a good practice to check the oil level every 50-60 hours of work.

  • Page 137: Driveline Maintenance

    MAINTENANCE DRIVELINE MAINTENANCE The Driveline should be serviced every 8 hours of operation. Refer to (Figure 5-3) 1. Disconnect the driveline from the Tractor PTO and from the Gearbox input shaft. 2. Pull the driveline halves apart. 3. Release the Shield Cones from the shield tubes by pressing down on the retaining tabs located under the access holes on the back of the shield cones (there are 3 tabs on each cone) and separate the shield tubes from the cones exposing the driveshaft inner and outer tubes.

  • Page 138: Blade Spindle And Belt Tension Idler Arm Lubrication And Maintenance

    MAINTENANCE BLADE SPINDLE and BELT TENSION IDLER ARM LUBRICATION & MAINTENANCE The area beneath the shielding must be cleaned of debris such as grass clippings and twigs to prevent buildup, causing friction on belt and pulleys. Clean any lubricant accumulation occuring during the lubrication procedures. Check drive pulleys and idler pulleys for excessive wear or damage.

  • Page 139: Blade Sersiceing

    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 removed by sharpen- ing.

  • Page 140: Blade Removal

    MAINTENANCE BLADE REMOVAL Never work under the implement, or any lifted component unless the imple- ment is securely supported or blocked to prevent sudden or inadvertant falling which can cause serious injury or death. The replacement of the blades must be done using maximum caution, and always with the tractor shut off and the dri- veshaft disconnected from the tractor.

  • Page 141: Belt Adjustment

    Belt Removal and Replacement (Figure 5-7) Note: Use only Genuine Bush Hog Belts for replacement. Will Fit (after market belts) may not meet the re- quirements for usage in belt life and mower performance.

  • Page 142: End Of Season Storage

    MAINTENANCE END of SEASON STORAGE Your rotary cutter represents an investment from which you should get the greatest possible benefit. Therefore, when the season is over, the cutter should be thoroughly checked and prepared for storage so that a minimum amount of work will be required to put it back into operation for the next season.
  • Page 143 MAINTENANCE HDTH 5 & 6 Finish Mower 08/21 Maintenance Section 5-9 © 2021 Alamo Group Inc.

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