MODEL STT 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.
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 wire and ignition key. * If a mechanism becomes clogged, stop the engine before cleaning.
TABLE OF CONTENTS SUBJECT PAGE Section 1 - General Information Introduction ..........................1 Directional Reference ......................1 Servicing the Engine and Drive Train Components ............... 1 Section 2 - Safety Information Introduction ..........................2 Signal Words .......................... 2 Before Operation Considerations ................... 2 Operation Considerations .......................
If additional information or service is needed, contact incurring any obligation. your Scag Power Equipment Dealer. 1.2 DIRECTION REFERENCE We encourage you to contact your dealer for repairs. All Scag dealers are informed of the latest methods to The “Right”...
Section 2 SAFETY INFORMATION 2.1 INTRODUCTION Your mower is only as safe as the operator. hazard. Carelessness or operator error may result in serious bodily injury or death. Hazard control and accident prevention are dependent upon the awareness, concern, The signal word “DANGER” denotes that an extremely prudence, and proper training of the personnel involved in the operation, transport, maintenance and storage of the equipment.
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.
Section 2 2.4 OPERATION CONSIDERATIONS 13. Disengage power to the attachments when (CONT'D) transporting or when not in use. 3. To prevent tipping or loss of control, do not start or 14. The machine and attachments should be stopped and stop suddenly, avoid unnecessary turns and travel at inspected for damage after striking a foreign object, reduced speed.
Section 3 3.3 TRACTOR (CONT'D) -NOTE- The machine will travel at 10mph for Travel Speed: transport purposes. For best cutting Forward ................0-10 MPH performance the forward travel speed Reverse ................. 0-5 MPH should be adjusted depending upon the 3.4 CUTTER DECK cutting conditions.
Section 4 OPERATING INSTRUCTIONS 1. Ignition Switch (Figure 4-1). The ignition switch is CAUTION: used to start the engine and has three positions; OFF, ON, and START. Do not attempt to operate this mower unless you have read this manual. Learn the location and 2.
Section 4 5. Ammeter (Figure 4-1). Indicates the condition of DUMP VALVE CONTROL LEVER the charging system. When the engine is running the needle should be toward the positive end of the meter. If the needle is toward the negative end of the meter, this indicates a discharge condition and the machine should be taken in for service.
Section 4 2. Change the engine oil and oil filter after the first 5 4.5 GROUND TRAVEL AND STEERING hours of operation. (See Section 7.4.) -IMPORTANT- 3. Check hydraulic oil level in reservoir. (See Section If you are not familiar with the operation of a 7.3.) machine with lever steering and/or hydrostatic transmissions, the steering and ground speed...
Section 4 -NOTE- To steer right while traveling in reverse, allow the right Smooth operation of the steering levers will steering control lever to move forward. The further the produce smooth mower operation. While control is allowed to move forward, the quicker the learning the operation of the steering controls, mower will turn right.
Section 4 4.7 HILLSIDE OPERATION -IMPORTANT- Do not wash a hot or running engine. Cold water will damage the engine. Use compressed air to clean the engine if it is hot. WARNING: 2. Keep the entire mower clean to inhibit serious heat DO NOT operate on steep slopes.
Section 4 4.10 REMOVING CLOGGED MATERIAL 5. When mowing wet or tall grass, mow the grass twice. Raise the mower to the highest setting for the first pass and then make a second pass to the desired height. ROTATING BLADES 6.
Section 4 LANYARD PIN 4.13 ADJUSTING CUTTING HEIGHT The mower deck can be adjusted from a height of 1-inch to 6 inches at 1/2-inch intervals. To adjust the cutting height: WARNING: Do not adjust the cutting height with the mower blades rotating.
Section 5 TROUBLESHOOTING CUTTING CONDITIONS CAUSE CURE CONDITION Stringers - Occasional Low engine RPM Run engine at full RPM Blades of Uncut Grass Ground speed too fast Slow speed to adjust for conditions Wet grass Cut grass after it has dried out Dull blades, incorrect sharpening Sharpen blades Deck plugged, grass accumulation...
Section 5 TROUBLESHOOTING (CONT'D) CAUSE CURE CONDITION Uneven Cut on Flat Lift worn from blade Replace blade Ground - Wavy High-Low Blade upside down Mount with cutting edge toward Appearance, ground Scalloped Cut, or Rough Contour Deck plugged, grass accumulation Clean underside of deck Too much blade angle (deck pitch) Adjust pitch and level...
Section 5 TROUBLESHOOTING (CONT'D) CAUSE CURE CONDITION Scalping - Blades Low tire pressures Check and adjust pressures Hitting Dirt or Cutting Very Close to Ground speed too fast Slow speed to adjust for conditions the Ground Cutting too low May need to reduce ground speed, raise cutting height, change direction of cut, and/or change pitch and level Rough terrain...
Section 6 7. Repeat steps 4-6 on the RH side of the machine. ADJUSTMENTS 6.1 PARKING BRAKE ADJUSTMENT 8. Replace the drive wheels and test the brake. WARNING: -NOTE- If this proceedure does not achieve proper brake Do not operate the mower if the parking brake is adjustment, please contact your authorized Scag not operable.
Section 6 B. The steering control levers are in the full forward 4. Adjust the RH wheel by loosening the jam nuts on the position and the mower pulls to one side or the steering control rod and turning the rod until the drive other when traveling in a forward direction.
Section 6 Tracking Adjustment A. Stop the machine and place the steering control levers in the neutral position. Loosen the lock nuts securing the ball joints at each end of the CAUTION: RH steering control rod. Rotate the control rod to lengthen the rod and tighten the lock nuts.
Section 6 3. Tighten the serrated hex nut to secure the cutter deck 6.6 CUTTER DECK ADJUSTMENTS in the proper position. Cutter deck level, pitch and height are set at the factory. However, if these adjustments should ever need to be Cutter Deck Pitch made, the following procedures will aid in obtaining the proper cutter deck adjustment.
Section 6 Cutter Deck Height 3. Check the cutter deck cutting height by placing the lanyard pin in the 3" position on the cutting height The cutter deck height adjustment is made to ensure that index. Release the deck from the transport positon the cutter deck is cutting at the height indicated on the and allow the deck to move to the 3"...
Section 7 A. Checking Hydraulic Oil Level The hydraulic oil should be changed after every 500 hours or annually, whichever occurs first. The oil should also be changed if the color of the fluid has become The hydraulic oil level should be checked after the first black or milky.
Section 7 C. Changing Hydraulic Oil Filter Element A. Checking Engine Crankcase Oil Level The engine oil level should be checked after every 8 hours of operation or daily as instructed in the Engine Operator’s Manual furnished with this mower. B.
Section 7 After the first 5 hours of operation, replace the engine oil 2. Install a new fuel filter. Be sure it is installed in the filter. Thereafter, replace the oil filter after every 200 proper direction. Secure to the fuel hose using the hours of operation or every month, whichever occurs two clamps.
Section 7 7.7 BATTERY WARNING: A. Checking Electrolyte Level and Cleaning Electric storage battery fluid contains Battery sulfuric acid which is POISON and can cause SEVERE CHEMICAL BURNS. Avoid After every 40 hours of operation or weekly, whichever contact of fluid with eyes, skin, or clothing. occurs first, check the electrolyte level in the battery and Use proper protective gear when handling clean the battery and connections.
Section 7 WARNING: WARNING: BATTERIES PRODUCE EXPLOSIVE GASES. Always wear proper hand and eye protection Charge the battery in a well ventilated space when working with cutter blades. so gases produced while charging can dissipate. 3. Check the cutter blades for straightness. If the cutter blades appear bent, they will need to be replaced.
Section 7 HEX NUT-TORQUE TO 75 LB-FT ANGLE BLADE BACK DO NOT CUT IN SPINDLE CUTTER SHAFT DECK X MUST NOT EXCEED 1/3 BLADE WIDTH 390S0139 Figure 7-9 Blade Sharpening HEX HEAD BOLT / NUT 2. Check the balance of the blade. If the blades are out of balance, vibration and premature wear can occur.
Section 7 7.11 CUTTER DECK GEARBOX 2. Remove the drain plug and drain the lubricant into the container and properly discard it. A. Checking Lubricant Level 3. Re-install the drain plug and add EP-80/90 lubricant through the check plug hole in the gearbox until it is CAUTION: level with the bottom of the check plug hole.
Section 7 7.13 BODY, DECK, AND UPHOLSTERY 3. Replace the radiator cap. Push down on the cap and turn clockwise until it stops. CAUTION: -NOTE- The cooling system should be flushed and the Do not wash any portion of the equipment coolant replaced every 500 hours of operation while it is hot.
Section 8 BRAKE AND STEERING COMPONENTS Ref. Part Ref. Part No. No. Description No. No. Description 481599 Grip, Handle Bar 48796 Bushing, Self Align 461037 Handle Bar (Includes item 1) 04001-08 Bolt, Hex Head 5/16-18 x 3/4" 04001-32 Bolt, Hex Head 3/8-16 x 1-1/4" 04001-147 Bolt, Hex Head 3/8-24 x 5-1/4", 2-3/4"...
Screw, Phillips Washer Head #10-32 x 1-1/2" 04031-03 Lockwasher, 5/16" External Tooth 04002-12 Bolt, Hex Head M8-1.25 x 20 481623 Electronic Module 481751 Wire Harness, STT * Common hardware which should be purchased locally. All bolts Grade 5 plated, all other fasteners zinc plated.
Electronic Module 481752 Wire Harness, STT-KA 481670 Sending Unit, Water Temp. 48030-11 Clamp, Cable 481183 Water Temp. Gauge (STT - KA Only) * Common hardware which should be purchased locally. All bolts Grade 5 plated, all other fasteners zinc plated.
Section 8 REPLACEMENT DECALS AND INFORMATION PLATES DANGER WARNING ROTATING BLADES AND BELTS SPINNING BLADE KEEP HANDS, FEET & CLOTHING CLEAR KEEP ALL GUARDS IN PLACE SHUT OFF ENGINE & DISENGAGE BLADE KEEP CLEAR CLUTCH BEFORE SERVICING CLEAR AREA OF DEBRIS BEFORE MOWING CONTACT CAN INJURE USE CAUTION IN DIRECTING DISCHARGE KEEP BYSTANDERS, CHILDREN &...
LIMITED WARRANTY-COMMERCIAL EQUIPMENT Any part of the Scag commercial mower manufactured by Scag Power Equipment and found, in the reasonable judgment of Scag, to be defective in materials or workmanship, will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts and labor.