User's Manual
Table Of Contents
- STT-31EFI Operators Manual 03251
- GENERAL INFORMATION
- SAFETY INFORMATION
- SPECIFICATIONS
- OPERATING INSTRUCTIONS
- 4.1 Controls And Instrument Identification
- 4.2 Safety Interlock System
- 4.3 Initial Run-In Procedures
- 4.4 Starting The Engine
- 4.5 Ground Travel And Steering
- 4.6 Engaging The Deck Drive (Cutter Blades)
- 4.7 Hillside Operation
- 4.8 Parking The Mower
- 4.9 After Operation
- 4.10 Removing Clogged Material
- 4.11 Moving Mower With Engine Stopped
- 4.12 Recommendations For Mowing
- 4.13 Adjusting Cutting Height
- 4.14 Adjusting The Steering Levers
- 4.15 Adjusting The Height Adjust Pedal
- 4.16 Towing (Optional Hitch Accessory)
- TROUBLESHOOTING CUTTING CONDITIONS
- ADJUSTMENTS
- MAINTENANCE
- ILLUSTRATED PARTS LIST
- 8.1 Scag Approved Attachments And Accessories
- ELECTRICAL SCHEMATIC (KOHLER 31HP - EFI)
- REPLACEMENT DECALS AND INFORMATION PLATES
- ELECTRICAL SYSTEM (31HP-EFI KOHLER)
- BDP-16A HYDRAULIC PUMP ASSEMBLY WITH COOLING FAN
- FUEL AND HYDRAULIC SYSTEM - KOHLER 31EFI
- BRAKE AND STEERING COMPONENTS
- DECK DRIVE COMPONENTS
- STT ROLL-OVER PROTECTION SYSTEM - WITH SUSPENSION SEAT
- SHEET METAL COMPONENTS
- CUTTER DECK CONTROLS
- 61V & 72VS CUTTER DECKS
- NOTES
- LIMITED WARRANTY - COMMERCIAL EQUIPMENT
10
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Section 3
SPECIFICATIONS
ENGINE3.1
General Type ................................................................................................Heavy Duty Industrial/Commercial Gasoline
Brand .......................................................................................................................................................................Kohler
Model ..................................................................................................................Kohler Aegis LH775S (PS-LH775-0015)
Horsepower ........................................................................................................................................ 31HP at 3600 RPM
Type ............................................4-Cycle, Twin Cylinder, Liquid-Cooled, Electronic Fuel Injected Horizontal Shaft, OHV
Displacement ..........................................................................................................................................................748 cc.
Cylinders ..................................................................................................................................... 2 with Cast-Iron Sleeves
Valve Group ....................................................................................................................................Hydraulic Valve Lifters
Governor ........................................................................Mechanical Type with Variable Speed Control Set At 3800 RPM
Idle Speed .............................................................................................................................................1500 RPM Kohler
Fuel Pump ...................................................................................................... Electric Fuel Pump with In-Line Fuel Filter
Carburation ..................................................................................................................................Electronic Fuel Injection
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
Cooling Group ..........................................................Heavy-Duty Radiator, High-Flow Engine Cooling Fan, Water Pump
Air Intake ........................................................................................................ Large Capacity 2-Stage Canister Air Filter
ELECTRICAL3.2
Battery ......................................................................................... 12 volt "Maintenance Free" Sealed Battery (300 CCA)
Charging System ............................................................................................................................................... Alternator
Charging Output .......................................................................................................................................12 Volt, 20 Amp
System Polarity .......................................................................................................................................Negative Ground
Interlock Switches ....................................................... Seat, Neutral Control, Mower Engagement (BBC), Parking Brake
Instrument Panel ..............................................................................Volt Meter, Key Switch, Throttle Lever, BBC Switch,
Fuses and Safety Start module, Water Temperature Gauge
Fuses ........................................................................................................................................................Two (2) 20 Amp
POWER HEAD3.3
Drive System ............... Hydraulic Drive with Two Variable Displacement Pumps and Two Cast-Iron High Torque Motors
Hydrostatic Pumps .....................................................................Two Hydro-Gear™ 16 cc/rev. Pumps with Dump Valves
Belts .................................................................................................................Kevlar cord. Self-adjusting, Self-tightening
Drive Wheel Motors
...................................................................... Two Hydro-Gear™ 18E Cast-Iron High Torque Motors
Steering/Travel Control ...........................................................................................Twin Lever Fingertip Steering Control
with Individual Control to Each Wheel with Gas Spring Dampers
Parking Brake ...................................................................Lever Actuated Linkage to Brakes on Both Drive Wheel Axles
Wheels:
(2) Front Caster ............................................................................................................................. 13 X 6.00 Flat-Free
(2) Drive .............................................................................. 24 x 12 x 12 Four-Ply Pneumatic Tubeless, Radius Edge
Tire Pressure:
Front Caster....................................................................................................................................................Flat Free
Drive
.................................................................................................................................................................. 12 PSI
Fuel Tank ......................................10-Gallon Seamless Polyethylene Tank with Large opening and Fuel Gauge Fill Cap
Seat ..................................................................................................................Padded, Thick Cushion with tall back rest
Travel Speed:
Forward ........................................................................................................................................................0-12 MPH
Reverse ..........................................................................................................................................................0-6 MPH
-NOTE- The machine will travel at 10 mph or 12 mph for transport purposes. For best cutting performance the
forward travel speed should be adjusted depending upon the cutting conditions.