Scag Power Equipment STT-31EFI-SS Engine Air Cleaner, Replacing In-Line Fuel Filter Elements

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Section 7

1.Extinguish all cigarettes, cigars, pipes and other sources of ignition.

2.Use only an approved gasoline container.

3.Never remove the gas cap or add fuel with the engine running. Allow the engine to completely cool before fueling.

4.Never fuel the machine indoors or in an enclosed trailer.

5.Never store the machine or fuel container where there is an open flame, spark or pilot light such as on a water heater or other appliances.

6.Never fill containers inside a vehicle or on a truck or trailer bed with a plastic liner. Always place containers on the ground away from your vehicle before filling.

7.Remove the machine from the truck or trailer and fuel on the ground. If this is not possible, then refuel the machine with a portable container, rather than from a gasoline dispenser nozzle.

8.Keep the nozzle in contact with the rim of fuel tank or container opening at all times until fueling is complete. Do not use a nozzle lock-open device.

9.If fuel is spilled on clothing, change clothing immediately and wash affected skin.

10.Replace gas cap and tighten securely.

B. Replacing In-Line Fuel Filter Elements

WARNING

Fuel System from the fuel pump to the engine is under high pressure.The fuel system after the fuel pump must be serviced by an Authorized Scag Power Equipment Dealer only.

The engine fuel filter should be replaced after every 500 hours of operation or annually, whichever occurs first. See Figure 7-6.

1.Close the shut-off valve.

2.Remove the two clamps securing the fuel filter to the fuel hose. Remove the fuel filter.

3.Install a new fuel filter. Be sure it is installed in the proper direction. Secure to the fuel hose using the two clamps.

4.Open the fuel shut-off valve.

Fuel Filter

(with high pressure hose clamps above and below)

STT-EFI-

Figure 7-6. Fuel Filter

7.6 Engine Air Cleaner

A. Cleaning and/or Replacing Air Cleaner Element

For any air cleaner, the operating environment dictates the air cleaner service periods. Inspect and clean the air cleaner element after every 100 hours of operation or bi-weekly, whichever occurs first and replace the element if required. See Engine Owner's Manual for service information.

- NOTE -

In extremely dusty conditions it may be necessary to check the element once or twice daily to prevent engine damage.

1.Unhook the clamps securing the air cleaner cover to the air filter canister. Remove the air cleaner cover and set aside.

2.Remove the air cleaner and inspect.

3.Clean or replace the air cleaner and foam pre-cleaner as recommended by the engine manufacturer.

4.Replace the air cleaner cover and be sure to snap the latches closed.

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Contents OPERATOR’S Manual With a serial number E3700001 to E3799999 STT61V-31EFI-SSSTT-31EFI-SS Table of Contents Adjustments Following SectionUSE only Scag Approved Attachments and Accessories General InformationIntroduction Direction ReferenceSymbol Description SymbolsSTT Models Safety Information Signal WordsThis symbol means Attention! Become Alert! Your Signal WordOperation Considerations Section Roll-Over Protection System Foldable Roll-over protection system if equippedFoldable Roll-Over Protection System Maintenance Considerations & Storage Using a spark arrestorSafety And Instructional Decals Install Belt COvER Before Specifications Power HeadEngine ElectricalCutter Deck Weights And DimensionsHydraulic System Operating Instructions Controls And Instrument IdentificationSafety Interlock System Dump Valve ControlInitial Run-In Procedures Starting The EngineGround Travel And Steering Forward TravelEngaging The Deck Drive Cutter Blades Reverse TravelHillside Operation Parking The MowerAfter Operation Removing Clogged MaterialMoving Mower With Engine Stopped Adjusting Cutting HeightRecommendations For Mowing Adjusting The Steering Levers Adjusting The Height Adjust PedalTowing Optional Hitch Accessory Troubleshooting Cutting Conditions Condition Cause CureE v e n C u t o n F l at Ground Wavy High-Low Appearance, ScallopedCut, or Rough Contour Sloping Ridge AcrossScalping Blades Hitting Dirt or CuttingVery Close To the GroundStep Cut Ridge in Center Cutting pathAdjustments Brake AdjustmentNeutral Adjustment RH Steering Control Rod AdjustmentThrottle Control and Choke Adjustments Tracking AdjustmentCutter Deck Level Cutter Deck PitchCutter Deck Height Adjustment Cutter Deck HeightPosition Custom-Cut Baffle Adjustment Early Models Custom-Cut Baffle AdjustmentPosition Custom-Cut Baffle Adjustment Current Production Position Custom-Cut Baffle Adjustment Electric clutch adjustment Clutch Air Gap AdjustmentMaintenance Maintenance Chart Recommended Service IntervalsProcedure Comments Break-In 100 200 500 First HoursLubrication Location Lubrication Interval Lubricant NO. PlacesLubrication Fitting Points Checking Hydraulic Oil Level Changing Hydraulic OilEngine Oil Engine Fuel SystemCleaning and/or Replacing Air Cleaner Element Engine Air CleanerReplacing In-Line Fuel Filter Elements Battery Charging the BatteryBattery Electrolyte First AID Jump StartingBlade Replacement Drive BeltsCutter Blades Blade InspectionCutter Deck Gearbox TiresChecking Lubricant Level Cleaning the Radiator Debris Screen Cooling SystemChanging Lubricant Checking Coolant LevelBody, Deck, And Upholstery Checking The Fan Belt TensionIllustrated Parts List Scag Approved Attachments And AccessoriesIllustrated Parts List 61V & 72VS Cutter Decks Description Cutter Deck Controls Cutter Deck Controls Sheet Metal Components Fender Weldment, RH Bolt, Hex Hd., 5/16-18 x 1, Zinc 43606 STT ROLL-OVER Protection System with Suspension Seat STT ROLL-OVER Protection System with Suspension Seat Deck Drive Components Belt Guard, Rear Hinge, Belt Guard 481309 Latch, Hood 482845 Engine & Attaching Parts 31HP-EFI Kohler Available through the individual engine manufacturer Brake and Steering Components Grip, Handle Bar Fuel and Hydraulic System Kohler 31EFI 24 403 BDP-16A Hydraulic Pump Assembly with Cooling FAN HG70924 Charge Pump Kit .19 STD. Splined HG51457 Electrical System 31HP-EFI Kohler Electrical System 31HP-EFI Kohler Heavy-Duty Commercial STT-EFI Decals Page2 Electrical Schematic Kohler 31HP EFI Limited Warranty Commercial Equipment Garantía Limitada Equipo Comercial Tapicería y plataforma Cuerpo Radiador del desechos de criba la de Limpieza .BVentilador del correa la de tensión la de Verificación .C NotaRefrigeración de Sistema La de cambios de CajaCorte de plataforma Llantas Cuchilla la de Reemplazo .CNota Cuchilla la de Reemplazo .8-7 Figura Corte de cuchillas con trabajar al ojos yCorte de Cuchillas Transmisión de CorreasCuchilla la de Inspección .A Puente por Arranque .BBatería Batería la de Carga .AAgua con Enjuague externo Contacto Batería DE Electrolito Para Auxilios PrimerosMotor del aire de Filtro Aire de filtro del elemento del reemplazo y/o Limpieza .ALínea en combustible de filtro Del elementos los de Reemplazo .BMotor del combustible de Sistema Motor del AceiteHidráulico aceite de nivel del Verificación .A Hidráulico SistemaHidráulico aceite de Filtro .3-7 Figura Conexión de puntos de Lubricación .1-7 Figura Ciones Lubricación Ubica Lubricante Ubicación DE Intervalo LubricaciónHoras Mantenimiento Recomendados servicio de Intervalos mantenimiento de TablaMontaje de accesorios de Ubicación Montaje de Ranura Posiciones 7 de personalizado corte de deflector del Ajuste Personalizado corte de deflector del AjustePosiciones 3 de personalizado corte de deflector del Ajuste Corte de plataforma la de Altura Corte de plataforma la de Tope .8-6 FiguraCorte de Plataforma la de altura de Ajuste .7-6 FiguraCorte de plataforma la de Nivel Corte de plataforma la de InclinaciónCorte de Plataforma la de nivel del Ajuste .5-6 Figura De controles los de Ajustes Estrangulación y aceleraciónAlineación de Ajuste Desplazamiento de Ajustes Neutral AjusteAjustes Estacionamiento de freno del AjusteFreno de varilla la de Ajuste .2-6 Figura Freno del vAjuste .1-6 FiguraCorte de trayectoria La de ancho del travésInclinadas Crestas Inclinado CorteLa de ancho lo a Inclinadas SalientesIrregular perfil o Volado corte onduladaCorte de trayectorias Entre cortar sin céspedDe Franjas Vetas La en cortar sin céspedOpcional enganche de accesorio Remolque Altura la de ajuste de pedal del Ubicaciones .8-4 FiguraAltura de ajuste de pedal del Ajuste Dirección de palancas las de AjusteDirección De palancas las de Ajuste .7-4 Figura Plataforma la de liberación de Palanca .6-4 FiguraCorte de altura la de Ajuste Césped elCortar para Recomendaciones Detenido motor el con cortacésped del DesplazamientoAtascado material del Retriro Operación la de DespuésCortacésped del Estacionamiento Cuesta una en OperaciónCorte de cuchillas plataforma de transmisión la de Conexión Reversa en DesplazamientoCortador Del accionamiento de Interruptor .3-4 FiguraDirección y terreno el en Desplazamiento Motor del ArranqueInicial arranque de Procedimientos Adelante hacia DesplazamientoSeguridad de bloqueo de Sistema Descarga de válvula de Control .2-4 FiguraLa Indica .1-4 Figura combustible de Indicador Usado .1-4 Figura dirección de derecho ControlInstrumentos e controles de Identificación Operación DE InstruccionesInstrumentos e Controles .1-4 Figura Dimensiones y Pesos ProductividadEspecificaciones Potencia de CabezalEléctrico Sistema MotorREvErSA AdELAntE Seguridad de y instructivas CalcomaníasAlmacenamiento y mantenimiento Chispas de supresor un UtiliceDe Consideraciones Mantener y inspeccionar de incumplimiento El Muerte la o graves lesiones ocasionarVuelco contra protección de plegable Sistema .1-2 Figura Equipado viene si vuelco contra Vuelco contra protección de SistemaProtección de Plegable Sistema Peligro Operación de Consideraciones Seguridad DE InformaciónOperación la a previas Consideraciones Señalización de PalabrasSTT Modelos SímbolosDescripción Símbolo Instrucciones de Referencia General InformaciónScag POR Aprobados Dispositivos USE Sólo Sección Sigue Comercial Equipo Limitada Garantía List Parts Illustrated 8 SecciónMantenimiento 7 Sección Ajustes 6 SecciónOperación DE Instrucciones 4 Sección Especificaciones 3 SecciónSeguridad DE Información 2 Sección General Información 1 Sección72VS-SMT 61V-SMTSS-31EFI-STT SS-31EFI-STT61VOperador DEL Manual

STT-31EFI-SS specifications

Scag Power Equipment is renowned for producing high-quality commercial mowing equipment, and the STT-31EFI-SS stand-on mower is no exception. Designed with professional landscapers in mind, the STT-31EFI-SS offers a perfect blend of power, efficiency, and maneuverability.

One of the standout features of the STT-31EFI-SS is its 31 hp EFI (Electronic Fuel Injection) engine. This powerhouse engine not only delivers impressive power but also enhances fuel efficiency. The EFI technology ensures that the engine operates at optimal performance by automatically adjusting the air-to-fuel ratio under varying conditions. This results in smoother starts, improved throttle response, and reduced emissions, making the mower both environmentally friendly and cost-effective in the long run.

The STT-31EFI-SS features a durable construction built to withstand the rigors of commercial use. Its robust steel frame and heavy-duty components are designed for maximum longevity. Moreover, the mower is equipped with Scag's cutting-edge Hydro-Gear ZT-3400 transmission, which offers exceptional speed and agility. This transmission allows operators to navigate tight spaces with ease and provides a top speed of up to 10.5 mph, making it ideal for large properties or demanding mowing tasks.

Operator comfort is another key aspect of the STT-31EFI-SS. The stand-on design promotes better visibility and quick maneuverability, enabling operators to navigate obstacles with confidence. The padded operator platform and adjustable controls ensure a comfortable experience, even during extended use. Additionally, the mower’s low center of gravity enhances stability on slopes and uneven terrain.

One of the most notable characteristics of the STT-31EFI-SS is its advanced cutting deck. The mower features a 48", 52", or 61" Velocity Plus cutting deck, which is known for delivering a superior cut and impressive grass dispersal. The deck is engineered for optimal airflow, enabling precision mowing while preventing clumping. This technology ensures that grass clippings are evenly distributed, resulting in a healthier lawn appearance.

In conclusion, the Scag STT-31EFI-SS stand-on mower integrates powerful performance, innovative engineering, and comfort. Featuring a reliable EFI engine, robust construction, and exceptional maneuverability, this mower stands out as an excellent choice for professional landscapers seeking efficiency and reliability in their equipment.
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