Manuals / Scag Power Equipment / Lawn and Garden / Lawn Mower

Scag Power Equipment STT61V-27KA, STT-29DFI-SS, STT-29DF-SS, STT61V-27CH Engine, Electrical

Models: STT61V-35BV-SS STT-29DF-SS STT61V-29DFI-SS STT61V-27CH STT61V-27KA STT52V-27CH STT-29DFI-SS STT-35BV-SS

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Section 3

SPECIFICATIONS

3.1 Engine

General Type		Heavy Duty Industrial/Commercial Gasoline
Model:
Scag Model STT52V-27CH, STT61V-27CH		Kohler Command CH740S
Scag Model STT61V-27KA		Kawasaki FD750D
Scag Model STT61V-29DFI-SS, STT-29DFI-SS		Kawasaki FD791D
Scag Model STT61V-35BV-SS, STT-35BV		Briggs & Stratton 613177
Horsepower @ 3800 RPM:
Scag Model STT52V-27CH, STT61V-27CH		27HP (Kohler Spec. #PS-CH740-3114)
Scag Model STT61V-27KA		27HP (Kawasaki Spec. #FD750D-CS08)
Scag Model STT61V-29DFI-SS, STT-29DFI-SS		29HP (Kawasaki Spec. #FD791D-CS04)
Scag Model STT61V-35BV-SS, STT-35BV-SS		35HP (Briggs & Stratton 613177-11454-E1)
Displacement:
Kohler CH740S		725cc
Kawasaki FD750D and FD791D		745cc
Briggs & Stratton		993cc
Type:
Kohler		4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV
Kawasaki (FD750D)		4-Cycle, Air-Cooled, Naturally Aspirated Gasoline, OHV
Kawasaki (FD791D)		4-Cycle, Liquid-Cooled, Digital Fuel Injection Gasoline, OHV
Briggs & Stratton		4-Cycle, Liquid-Cooled, Naturally Aspirated Gasoline, OHV
Cylinders		2 with Cast Iron Sleeves
Governor		Mechanical Type with Variable Speed Control Set At 3800 RPM
Idle Speed:
Kohler		1400 RPM
Kawasaki		1400 RPM
Briggs & Stratton		1750 RPM
Carburation:
Kohler	Fixed Jet Carburetor with Smart-Choke™ and Fuel Shutdown Solenoid
Kawasaki (FD750D)		Fixed Jet Downdraft Carburetor
Kawasaki (FD791D)		Digital Fuel Injection
Briggs & Stratton		Fixed Jet Sidedraft Carburetor
Fuel Pump:
Kohler		Mechanical with In-Line Fuel Filter
Kawasaki		High Pressure Electric with In-Line Fuel Filter
Briggs & Stratton		Vaccum Pulse with In-Line Fuel Filter
Fuel		Non-Leaded Gasoline with a Minimum Octane Rating of 87
Oil Pump		Full Pressure w/Full-Flow Filter
Starter		Electric Starting with Solenoid Shift
Belts		Kevlar cord. Self-adjusting, Self-tightening

3.1 Electrical

Battery	12 Volt
Charging System	Alternator
Charging Output:
Kohler	12 Volt, 15 Amp
Kawasaki	12 Volt, 20 Amp
Briggs & Stratton	12 Volt, 20 Amp
System Polarity	Negative Ground
Interlock Switches	Seat, Neutral Control, Mower Engagement (BBC), Parking Brake
Instrument Panel	Ammeter, Key Switch, Throttle Lever, Manual Choke, BBC Switch,
	Fuses and Safety Start module, Temp. Gauge (KA), Check Engine Indicator (DFI)
Fuses	Two (2) 20 Amp
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Scag Power Equipment STT61V-27KA, STT-29DFI-SS, STT-29DF-SS, STT61V-27CH, STT61V-29DFI-SS, STT-35BV-SS Engine, Electrical

Contents

OPERATOR’S Manual With a serial number D9900001 to D9999999 With a serial number D7700001 to D7799999With a serial number D7800001 to D7899999 With a serial number D8100001 to D8199999 Table of Contents Maintenance Chart Recommended Service Intervals Parking Brake AdjustmentThrottle Control And Choke Adjustments Cutter Deck Adjustments Custom-Cut Baffle Adjustment Inside Back Cover Introduction Direction ReferenceServicing The Engine And Drive Train Components STT Models Symbols Before Operation Considerations Signal WordsThis symbol means Attention! Become Alert! Your Signal Word Operation Considerations Section Foldable Roll-over protection system if equipped Roll-Over Protection System Foldable Roll-Over Protection System Maintenance Considerations & Storage Safety And Instructional Decals Install Belt COvER Before Electrical Engine Cutter Deck Power Head Weights And Dimensions 52V 61V 72A / 72VS Hydraulic SystemProductivity 52V 61V 72A / 72VS Controls And Instrument Identification Operating Instructions Dump Valve Control Safety Interlock System Forward Travel Initial Run-In ProceduresStarting The Engine Ground Travel And Steering Reverse Travel Engaging The Deck Drive Cutter Blades Removing Clogged Material Hillside OperationParking The Mower After Operation Adjusting Cutting Height Moving Mower With Engine StoppedRecommendations For Mowing Adjusting The Height Adjust Pedal Adjusting The Steering Levers Towing Optional Hitch Accessory Condition Cause Cure Sloping Ridge Across E v e n C u t o n F l atGround Wavy High-Low Appearance, Scalloped Cut, or Rough Contour Cutting path Scalping Blades HittingDirt or CuttingVery Close To the Ground Step Cut Ridge in Center Parking Brake Adjustment Adjustments Neutral Adjustment Travel Adjustments Throttle Control And Choke Adjustments Belt AdjustmentTracking Adjustment Cutter Deck Pitch Cutter Deck AdjustmentsBelt Alignment Cutter Deck Level Custom-Cut Baffle Adjustment Position Custom-Cut Baffle Adjustment eARLY mODELSCutter Deck Height Position Custom-Cut Baffle Adjustment cURRENT pRODUCTION Position Custom-Cut Baffle Adjustment Procedure Comments Break-In 100 200 500 First Maintenance Chart Recommended Service Intervals Lubrication Maintenance Chart Recommended Service Intervals Contd Lubrication Fitting Points Changing Hydraulic Oil Checking Hydraulic Oil Level Engine Fuel System Engine Oil Engine Air Cleaner Cleaning and/or Replacing Air Cleaner ElementReplacing In-Line Fuel Filter Elements Battery Charging the BatteryJump Starting Blade Inspection Blade ReplacementDrive Belts Cutter Blades Tires Cutter Deck GearboxChecking Lubricant Level Liquid-Cooled Machines Only Cleaning the Radiator Debris ScreenCooling System Changing Lubricant Checking The Fan Belt Tension Liquid- Cooled Engines Only Body, Deck, And Upholstery Scag Approved Attachments And Accessories Illustrated Parts List 22A 52V Cutter Deck 61V & 72VS Cutter Decks 04001-136 72A Cutter Deck 461865 Cutter Deck, 72 Advantage w/Decals Cutter Deck Controls Slide Weldment, Height Adjustment Sheet Metal Components 9278 STT 2007 Rops Description Section STT ROLL-OVER Protection System with Suspension Seat Section STT ROLL-OVER Protection System with Suspension Seat Deck Drive Components Bolt, Hex Head 3/8-16 x Engine and Attaching Parts Kohler Available through the individual engine manufacturer Engine & Attaching Parts 27HP, 29DFI Kawasaki Engine & Attaching Parts 27HP, 29DFI Kawasaki Engine & Attaching Parts 35HP Briggs & Stratton Engine & Attaching Parts 35HP Briggs & Stratton Brake and Steering Components Bolt, Carriage 5/16-18 x Fuel and Hydraulic System Inch Fuel and Hydraulic System 29DFI Kawasaki 481164 Cap, Hydraulic Tank 481507 Insert, Filler Neck BDP-16A Hydraulic Pump Assembly BDP-16A Hydraulic Pump Assembly Port a Side Description Electrical System Kohler Ammeter Electrical System 27HP KAWASAKI, 35BV Briggs & Stratton Water Temp. Gauge Electrical System 29DFI Kawasaki Water Temp. Gauge STT KA Only Heavy-Duty STT Decals Page2 STT Electrical Schematic Kohler STT Electrical Schematic 27HP Kawasaki Electrical Schematic 29DFI Kawasaki Electrical Schematic Briggs & Stratton 35BV Section Limited Warranty Commercial Equipment Garantía Limitada Equipo Comercial Sección Solamente Llantas LA DE Cambios DE CajaRefrigeración DE Sistema Corte DE Plataforma Cuchillas las de Afilado .B Transmisión DE Correas Corte DE Cuchillas Batería DE Electrolito Para Auxilios Primeros Batería DEL Combustible DE Sistema Motor Hidráulico Hidráulico aceite de Cambio .B Hidráulico Sistema Conexión de puntos de Lubricación 1-7 Figura Grasa DE Conexión DE Lubricación DE Tabla Lubricación 36 Página 1,-7 Figura LA VEA Refrigerante del nivel el Verifique Recomendados Servicio DE Intervalos Mantenimiento DE Tabla De personalizado Personalizado corte de deflector del Ajuste Corte de plataforma la de Altura DE Plataforma LA DE Ajustes Corte Correa LA DE Alineación Correa LA DE AjusteEstrangulación Y Aceleración DE Controles LOS DE Austes Izquierda mano a Derecha mano a Desplazamiento DE Ajustes Scag de autorizado Estacionamiento DE Freno DEL Ajuste Solución Causa Condición Irregular Corte deTrayectoria la de ancho Lo a inclinadas Salientes De Franjas Vetas CorteDe trayectorias entre Cortar sin césped Altura la de ajuste de pedal del Ubicaciones 9-4 Figura Sección Opcional enganche de accesorio Remolque Dirección de palancas las de Ajuste En palancas las ponga corte, de cuchillas las a Advertencia Rellenar y combustible Ocurrido ha Si MOTIVO! Ningún POR Descarga Cuesta UNA EN Operación Adelante hacia Desplazamiento Reversa en Desplazamiento Personales lesiones y/o motor al daños causar Una causar o explosivo potencialmente ser puedeDe uso El .ARRANQUE DE Líquidos USE no Figura estacionamiento de freno del Control El y ubicación la Aprenda .manual este leído haya Horario control de Instrumentos e Controles 1-4 FiguraCortacésped este operar de antes Instrumentos e controles los todos de propósito Productividad Continuación 3TRACTOR.3 3TRACTOR.3 Seguridad DE Y Instructivas Calcomanías Reversa Adelante Dé entrenamiento sin personalNUNCAque permita.8 Almacenamiento Y Mantenimiento DE Consideraciones Rops del Bisagra 2-2 Figura Vuelco Contra Protección DE Sistema Precaución Osha POR Aprobadas Operaciones Operación DE Consideraciones Sección Señalización DE Palabras Operación LA a Operar DE Antes Lento Rápido Símbolos Introducción Instrucciones DE Referencia Continuación Contenido DE Tabla Contenido DE Tabla 52V-SMT 72A-SMSTBV BVAC, 61V-SMT 61V-SMT Manual