Scag Power Equipment STT-31BSG manual Safety Interlock System, Dump Valve Control

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Section 4

5. Voltmeter (Figure 4-1). Indicates the condition of the charging system. When the engine is running, in normal operating conditions, the needle should be in the 12 to 14 volt range.

6. Oil Pressure (Figure 4-1). Indicates engine oil pressure. Reference the engine operator's manual for further information.

7. Hourmeter (Figure 4-1). Indicates the number of hours the engine has been operated. It operates whenever the engine is running. It can be used to keep track of maintenance intervals and the amount of time required to perform various tasks.

8. Fuse Holders (Figure 4-1). There are two 20- amp fuses and one 40-amp fuse that protect the mower’s electrical system. To replace fuses, pull fuse out of the socket and install a new fuse.

9. Left Steering Control (Figure 4-1). Used to

control the mower's left wheel when traveling forward or reverse.

10.Right Steering Control (Figure 4-1). Used to control the mower's right wheel when traveling forward or reverse.

11.Parking Brake Control (Figure 4-1). Used to engage and disengage the parking brakes. Pull the lever back to engage the parking brakes. Push the lever forward to disengage the parking brakes.

12.Fuel Tank Gauge (Figure 4-1). Indicates the amount of fuel in the fuel tank.

13.Dump Valve Control Levers (Figure 4-2). Located on the hydraulic pumps, used to “free- wheel” the mower. Rotating the levers clockwise until they stop allows the unit to move under hydraulic power. The levers must be in this position and torqued to 10ft/lbs during operation of the mower. Rotating the levers counter-clockwise allows the mower to be moved by hand (free- wheeling).

14.Deck Lift Foot Lever (Figure 4-1). Used to raise and lower the cutter deck.

DUMP VALVE￿

CONTROL

390S141-1

Figure 4-2 Dump Valve Control

15.Cutting Height Adjustment (Figure 4-1). Used to set the cutter deck at the desired cutting height.

16.Deck Release Lever (Figure 4-1). Used to lock the cutter deck in the transport position. Push the foot pedal forward and lift up on the release lever to release the cutter deck for normal mowing.

17.Temperature Gauge (Figure 4-1). Indicates the operating temperature of the engine.

4.2 SAFETY INTERLOCK SYSTEM

The mower is equipped with a safety interlock system that prevents the engine from starting unless the deck drive is disengaged, the parking brake is engaged, the steering control levers are in the neutral position and the operator is in the seat. The interlock system shuts off the engine if the operator leaves the seat with the steering control levers not in the neutral position and/or the cutter blades engaged and the parking brake not engaged.

WARNING:

Never operate the mower with the interlock system disconnected or malfunctioning. Do not disengage or bypass any switch; injury to yourself and others or property damage could result.

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Contents OPERATOR’S Manual Remember Your Mower is only AS Safe AS the Operator Table of Contents Table of Contents Contd Servicing the Engine and Drive Train Components General InformationIntroduction Direction ReferenceISO Symbols CE Mark Fast Slow Before Operation Considerations Safety InformationOperation Considerations Before Operation Considerations ContdOperation Considerations Contd Maintenance ConsiderationsSafety and Instructional Decals Engine Engine DeckDrive System Productivity SpecificationsAdditional Specifications Approximate DimensionsControls and Instrument Identification Operating InstructionsDump Valve Control Safety Interlock SystemStarting the Engine Ground Travel and SteeringForward Travel Engaging the Deck Drive Cutter Blades Reverse TravelHillside Operation Parking the MowerAfter Operation Removing Clogged Material Moving Mower with Engine StoppedRecommendations for Mowing Towing optional hitch accessory Adjusting Cutting HeightCondition Cause Cure Troubleshooting Cutting ConditionsScalloped Cut, or Rough Contour Troubleshooting Contd Condition Cause CureGround Troubleshooting ContdAdjustments Parking Brake AdjustmentTravel Adjustments RH Steering Control Rod Adjustment Neutral AdjustmentBelt Alignment Tracking AdjustmentThrottle Control and Choke Adjustments Belt AdjustmentCutter Deck Adjustments Cutter Deck LevelCutter Deck Pitch Cutter Deck Height Custom-Cut Baffle AdjustmentCustom Cut Baffle Maintenance Chart Recommended Service Intervals MaintenanceLubrication Grease Fitting Lubrication Chart see Figure Maintenance Chart Recommended Service Intervals ContdLubrication Fitting Points Hydraulic System Checking Hydraulic Oil LevelChanging Hydraulic Oil Changing Engine Crankcase Oil Engine OILChanging Hydraulic Oil Filter Element Checking Engine Crankcase Oil LevelEngine AIR Cleaner BatteryEngine Fuel System Battery Electrolyte First AID Charging the BatteryBlade Inspection Jump StartingDrive Belts Cutter BladesTires Blade ReplacementChecking Coolant Level Cutter Deck GearboxChecking Lubricant Level Cooling SystemCleaning the Radiator Debris Screen Checking The Fan Belt TensionBODY, DECK, and Upholstery Page 61A, 72A Cutter Decks Ref. Part Description Cutter Deck Controls Part Description Sheet Metal Components Wheel Assy Inc.items 20, 42, 43, 54 Deck Drive Components Ref. Part Description RADIATOR, Coolers & Engine Brackets Ref. Part No. No. Description Brake and Steering Components Part Description Fuel and Hydraulic System Ref. Part Description Electrical System Ref. Part No. No. Description Hydraulic Pump Assembly BDP-21L Housing Kit Includes Housing, Journal Bearing Wire HARNESS, STT 31BSG Part Number Heavy-Duty 48825 48314 481937 Limited Warranty Commercial Equipment 2002
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