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OPERATOR’S MANUAL
MODEL STT-31BSG
THIS MANUAL CONTAINS THE OPERATING
INSTRUCTIONS AND SAFETY INFORMA-
TION FOR YOUR SCAG MOWER. READING
THIS MANUAL CAN PROVIDE YOU WITH
ASSISTANCE IN MAINTENANCE AND AD-
JUSTMENT PROCEDURES TO KEEP YOUR
MOWER PERFORMING TO MAXIMUM EFFI-
CIENCY. THE SPECIFIC MODELS THAT THIS
BOOK COVERS ARE CONTAINED ON THE
INSIDE COVER. BEFORE OPERATING YOUR
MACHINE, PLEASE READ ALL THE INFOR-
MATION ENCLOSED.
PART NUMBER 03121
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WARNING: FAILURE TO FOLLOW SAFE OPERATING PRACTICES MAY RESULT IN SERIOUS INJURY. * Keep all shields in place, especially the grass discharge chute. * Before performing any maintenance or service, stop the machine and remove the spark plug wires and ignition key. * If a mechanism becomes clogged, stop the engine before cleaning. * Keep hands, feet and clothing away from power-driven parts. * Read this manual completely as well as other manuals that came with your mower. * Keep oth
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TABLE OF CONTENTS SUBJECT PAGE Section 1 - General Information 1.1 Introduction .............................................................................................................................1 1.2 Directional Reference.............................................................................................................1 1.3 Servicing the Engine and Drive Train Components ................................................................1 Section 2 - Safety Informat
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TABLE OF CONTENTS (CONT'D) SUBJECT PAGE Section 6 - Adjustments 6.1 Parking Brake Adjustment .................................................................................................... 20 6.2 Travel Adjustments ...............................................................................................................20 6.3 Throttle Control and Choke Adjustments .............................................................................. 22 6.4 Belt Adjustment .....................
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Section 1 GENERAL INFORMATION For pictorial clarity, some illustrations and figures in this 1.1 INTRODUCTION manual may show shields, guards or plates open or removed. Under no circumstances should your mower be Your mower was built to the highest standards in the operated without these devices in place. industry. However, the prolonged life and maximum efficiency of your mower depends on you following the All information is based upon product information operating, maintenance and adjustment
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ISO Symbols CE Mark SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake Spinning Blade 48071S On/Start Spring Tension on Idler Off/Stop Oil WARNING Falling Hazard FALLING HAZARD USE ONLY SCAG APPROVED RIDING ATTACHMENTS 481109 SEE OPERATOR'S MANUAL 2
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SYMBOL DESCRIPTION SYMBOL DESCRIPTION Slow Fast Cutting Element - Basic symbol Continuously Variable - Linear Cutting Element - Engage Pinch Point 481039S Hourmeter/Elapsed Operating Hours Cutting Element - Disengage Read Operator's Manual Thown Object Hazard Keep Bystanders Away 3
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Section 2 SAFETY INFORMATION 2.1 INTRODUCTION Your mower is only as safe as the operator. The signal word “DANGER” denotes that an extremely Carelessness or operator error may result in serious hazardous situation exists on or near the machine that bodily injury or death. Hazard control and accident could result in high probability of death or irreparable prevention are dependent upon the awareness, concern, injury if proper precautions are not taken. prudence, and proper training of the person
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Section 2 2.3 BEFORE OPERATION 10. DO NOT add fuel to a running or hot engine. Allow CONSIDERATIONS (CONT'D) the engine to cool for several minutes before adding fuel. 5. DO NOT wear loose fitting clothing that could get tangled in moving parts. Do not operate the machine 11. Keep flammable objects (cigarettes, matches, etc.), wearing shorts; always wear adequate protective open flames and sparks away from the fuel tank and clothing including long pants. Wearing safety fuel container. glasses
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Section 2 13. Disengage power to the attachments when 2.4 OPERATION CONSIDERATIONS transporting or when not in use. (CONT'D) 14. The machine and attachments should be stopped and 3. To prevent tipping or loss of control, start and stop inspected for damage after striking a foreign object, smoothly, avoid unnecessary turns and travel at and damage should be repaired before restarting and reduced speed. operating the machine. 4. When using any attachment, never direct the 15. DO NOT touch the engi
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Section 2 2.6 SAFETY AND INSTRUCTIONAL DECALS WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR'S MANUAL 481039 481039 482285 FORWARD R F REVERSE 481568 482286 482290 482580 482710 390S0150C 7
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Section 3 SPECIFICATIONS SCAG “SABRE TOOTH TIGER” ZERO-TURN RIDER MODEL: STT– 31BSG ENGINE General Type: Heavy duty industrial/commercial Brand: Briggs Daihatsu Vanguard Liquid Cooled 31 HP Model: DM950G Horsepower: 31 HP @ 3600 RPM Type: water cooled 4 cycle, overhead valve, 3 cylinder, gas engine Displacement: 952 cc Cylinders: 3 inline sleeves Governor: High-speed flyweight governor, runs faster than engine crankshaft, provides precision speed governing and a steady low idle, 3600 rpm (±100 r
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Section 3 SPECIFICATIONS (CON'T) SCAG “SABRE TOOTH TIGER” ZERO-TURN RIDER MODEL: STT– 31BSG CUTTER DECK Type: SMST-72A ("Advantage") & SMST-61A ("Advantage") - Floating, adjustable anti- scalping, hybrid design combines out-front and belly-mount designs. "Advantage" - special extended front edge allows Bahia or other tough grasses to enter the deck standing upright for a clean cutting. Construction: 10-gauge steel top reinforced with 7 gauge support plate, deck skirt is 7 gauge steel True Cutti
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Section 4 OPERATING INSTRUCTIONS 1. Ignition Switch (Figure 4-1). The ignition switch is used to start the engine and has three positions; OFF, CAUTION: ON, and START. Do not attempt to operate this mower unless you have read this manual. Learn the location and 2. Mower Deck Switch (Figure 4-1). Used to purpose of all controls and instruments before you engage and disengage the mower drive system. operate this mower. Pulling up on the switch will engage the deck drive. Pushing down on the swi
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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. DUMP VALVE CONTROL 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 390S
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Section 4 7. Turn the ignition key to the START position and 4.3 INITIAL RUN-IN PROCEDURES (First release the key as soon as the engine starts. Do not Day of Use or Approximately 10 Hours) hold the key in the START position for more than 15 seconds at a time. Allow at least 60 seconds 1. Check all belts for proper alignment and wear at 2, 4 between each cranking attempt to prevent and 8 hours. overheating of the starter motor. Prolonged cranking can damage the starter motor and shorten
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Section 4 To steer the mower left while traveling forward, pull the To steer left while traveling in reverse, allow the left left steering lever back. The further the lever is pulled steering control lever to move forward. The further the back, the quicker the mower will turn left. control is allowed to move forward, the quicker the mower will turn left. To steer the mower right while traveling forward, pull the right steering control lever back. The further the lever is To steer right while
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Section 4 4. Always operate the engine at full throttle to properly 4.9 AFTER OPERATION maintain cutting speed. If the engine starts to lug down, reduce the forward speed and allow the 1. Wash the entire mower after each use. Do not use engine to operate at maximum RPM. high pressure spray or direct the spray onto electrical components. 4.7 HILLSIDE OPERATION -IMPORTANT- Do not wash a hot or running engine. Cold water will damage the engine. Use compressed WARNING: air to clean the engine if
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Section 4 3. Cut grass when it is dry and not too tall. Do not cut 4.10 REMOVING CLOGGED MATERIAL grass too short (cut off 1/3 or less of existing grass for best appearance). Mow frequently. 4. Keep mower and discharge chute clean. ROTATING BLADES NEVER PUT YOUR HANDS INTO THE DISCHARGE 5. When mowing wet or tall grass, mow the grass twice. CHUTE FOR ANY REASON! Shut off the engine Raise the mower to the highest setting for the first and remove the key and only then use a stick or pass and t
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6 5.5 5 4.5 4 3.5 3 2.5 2 1.5 1 481543 CUTTING HEIGHT Section 4 DECK RELEASE 4.13 ADJUSTING CUTTING HEIGHT LEVER The mower deck can be adjusted from a height of 1-inch to 6 inches at 1/4-inch intervals. To adjust the cutting height: 1. Disengage the power to the cutter blades. 2. Push the cutting height adjustment foot pedal all the way forward using your right foot until it locks in place. (Figure 4-6). 3. Insert the lanyard pin into the cutting height index at the desired cutting height.
