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This manual covers the operating instructions and illustrated parts list for: STC48V-19KAI with a serial number of C1600001 to C1699999 STC48V-23CV with a serial number of C2000001 to C2099999 STC48V-21KA with a serial number of B5100001 to B5199999...
TABLE OF CONTENTS SUBJECT PAGE Section 1 - General Information Introduction ..........................1 Directional Reference ......................1 Servicing the Engine and Drive Train Components ..............1 Symbols ..........................2-3 Section 2 - Safety Information Introduction ..........................4 Signal Words ...........................4 Before Operation Considerations ...................4 Operation Considerations ......................5 Roll Over Protection System ....................7 Maintenance Considerations ....................9...
Any unauthorized work done on these USE ONLY SCAG APPROVED ATTACHMENTS components during the warranty period may void your AND ACCESSORIES. warranty. Attachments and accessories manufactured by companies other than Scag Power Equipment are not approved for use on this machine.
ISO Symbols CE Mark SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake Spinning Blade 48071S On/Start Spring Tension on Idler Off/Stop Falling Hazard Thown Object Hazard WARNING FALLING HAZARD USE ONLY SCAG APPROVED RIDING ATTACHMENTS SEE OPERATOR'S MANUAL 481109...
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...
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.
Section 2 2.3 BEFORE OPERATION 12. DO NOT add fuel to a running or hot engine. Allow CONSIDERATIONS (CONT'D) the engine to cool for several minutes before adding fuel. 6. If the operator(s) or mechanic(s) cannot read English or Spanish, it is the owner's responsibility to explain 13.
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Section 2 2.4 OPERATION CONSIDERATIONS 13. Take all possible precautions when leaving the machine unattended, such as disengaging the mower, lowering (CONT'D) the attachments, setting the parking brake, stopping the engine, and removing the key. 3. To prevent tipping or loss of control, start and stop smoothly, avoid unnecessary turns and travel at reduced 14.
Section 2 2.5 ROLL OVER PROTECTION SYSTEM Lower the roll bar only when absolutely necessary. 1. To lower the roll bar, loosen the tension knob on both WARNING: the left hand and right hand bar. See Figure 2-1. Keep the roll bar in the raised and locked 2.
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Section 2 3. Check the buckle and latch for proper operation and determine if the latch plate is excessively worn, deformed, or if the buckle is damaged or cracked. See Figure 2-4. INSPECT BUCKLE SEAT BELT & LATCH RETAINER BRACKET INSPECT WEBBING Figure 2-4 Seat Belt Inspection RETAINER...
Section 2 2.6 MAINTENANCE CONSIDERATIONS & 11. Use jack stands to support components when required. STORAGE 12. Carefully release pressure from components with 1. Never make adjustments to the machine with the stored energy. engine running unless specifically instructed to do so. If the engine is running, keep hands, feet, and clothing away from moving parts.
3.1 ENGINE General Type ................Heavy Duty Industrial/Commercial Gasoline Brand ..................Kawasaki, Kohler, Honda, Briggs & Stratton Horsepower ................19 HP (Spec.#FH580V) (Scag Model STC48V-19KAI) 21 HP (Spec.#FH641V) (Scag Model STC48V-21KA, STC52V-21KA) 23 HP (Spec.#CV23S) (Scag Model STC48V-23CV) 23 HP (Spec.#FH680V) (Scag Model STC52V-23KA) 24 HP (Spec.
Section 3 3.3 TRACTOR (CONT'D) -NOTE- The machine will travel at 10 mph 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). Used to start the CAUTION: 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. Hourmeter (Figure 4-1). Indicates the number of DUMP VALVE CONTROL LEVERS hours the engine has been operated. It operates whenever the ignition key switch is in the ON position. Has preset maintenance reminders for engine and hydraulic system oil changes. Will start flashing scheduled maintenance 2 hours before preset time and continue flashing until 2 hours after.
Section 4 4.3 INITIAL RUN-IN PROCEDURES (First 6. Turn the ignition key to the START position and release the key as soon as the engine starts. Do not Day of Use or Approximately 20 Hours) hold the key in the START position for more than 15 seconds at a time.
Section 4 To steer the mower right while traveling forward, pull the To steer right while traveling in reverse, allow the right right steering control lever back. The further the lever is steering control lever to move forward. The further the pulled back, the quicker the mower will turn right.
Section 4 3. To disengage the deck drive, push the switch in to 4.8 PARKING THE MOWER the disengage position. 1. Park the machine on a flat, level surface only. Do not park the machine on an incline. 4. Always operate the engine at full throttle to properly maintain cutting speed.
Section 4 4.10 REMOVING CLOGGED MATERIAL 4. Keep mower and discharge chute clean. 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 ROTATING BLADES height.
Section 4 5. Travel slowly and allow extra distance to stop. 6. Zero turning with a trailer attached, could cause damage to the trailer or mower. 4.15 Adjusting the Steering Levers 1. Position the seat to the desired location. 2. While in the operator's position with out the engine running, move both steering levers forward and reverse to check for full function control and comfort.
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...
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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...
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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 -NOTE- ADJUSTMENTS If this procedure does not achieve proper brake adjustment, please contact your authorized Scag 6.1 PARKING BRAKE ADJUSTMENT dealer. WARNING: STC2002BA DO NOT operate the mower if the parking brake is not operable. Possible severe injury could result. The parking brake linkage should be adjusted whenever LOOSEN the parking brake lever is placed in the “ENGAGE”...
Section 6 TRAVEL ADJUSTMENTS 3. Run the engine at full operating speed and check if the machine creeps forward or backwards. Neutral or tracking adjustments will need to be made if: 4. Adjust the RH wheel by loosening the jam nuts on the steering control rod and turning the rod until the A.
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 shorten the rod and tighten the lock nuts.
Section 6 6.6 CUTTER DECK ADJUSTMENTS 3. Tighten the two elastic stop nuts to secure the cutter deck in the proper position. Cutter deck level, pitch and height are set at the factory. Cutter Deck Pitch However, if these adjustments should ever need to be made, the following procedures will aid in obtaining the proper cutter deck adjustment.
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Section 6 -NOTE- To prevent the cutter deck from teetering, all four cutter deck hanging chains must have tension on them. If all four chains do not have tension on them and the deck teeters, you must readjust the cutter deck as outlined in the procedures above. All measurements should be taken from the top edge of the deck as the Advantage decks have an uneven bottom edge.
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Section 6 A. 3" Position - baffle is installed using the top set of TOP SET OF HOLES CARRIAGE BOLT FOR 3" SETTING holes on the front baffle welded inside the cutter deck. (See Figure 6.9). In this position the Velocity- Plus cutter deck will deliver the best quality-of-cut in very tall, wiry, tough to cut grass.
Section 7 7.3 HYDRAULIC SYSTEM B. Changing Hydraulic Oil 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 black or milky. The hydraulic oil level should be checked after the first 10 A black color and/or a rancid odor usually indicates possible hours of operation.
Operator’s Manual furnished with this mower for to Engine Operator’s Manual for instructions. instructions. -NOTE- The engine oil filter for the Honda engine is supplied by Scag Power Equipment. Use only the part number listed in the illustrated parts list of this manual when replacing.
Section 7 7.5 ENGINE FUEL SYSTEM 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 To avoid injury from burns, allow the mower to immediately and wash affected skin.
Section 7 7.7 BATTERY A. Charging the Battery Refer to the battery charger’s manual for specific WARNING: instructions. Battery posts, terminals, and related acces- sories contain lead and lead compounds, Under normal conditions the engine’s alternator will have chemicals known to the State of California no problem keeping a charge on the battery.
Section 7 7.8 DRIVE BELTS B. Blade Sharpening All drive belts are spring loaded and self-tensioning, however -NOTE- after the first 2, 4, 8 and 10 hours of operation, the belts If possible, use a file to sharpen the blade. Using should be checked for proper alignment and wear.
Section 7 7.10 TIRES 3. Secure the cutter blades to prevent them from rotating, (Use the optional Blade Buddy tool, P/N 9212, to assist in securing the cutter blades), remove the nut from the Check the tire pressures after every 8 hours of operation blade attaching bolt.
Section 8 STC ROLL OVER PROTECTION SYSTEM Ref. Part No. No. Description 9512 STC Foldable ROPS Accessory (incl. all items listed) 04001-145 Bolt, Hex Head 1/2-13 x 3-1/2” 04021-19 Nut, Center Lock 1/2-13 483150 Seat Belt 04040-13 Flatwasher, 1/2-.562 x 1.375 x .109 481625-03 Thumb Screw, 5/16-18 NC x 3-4”...
Section 8 REPLACEMENT DECALS AND INFORMATION PLATES 48404 FORWARD Hea vy- Duty REVERSE Comm e rcial 482100 481971 WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR'S MANUAL 481039 482982 STC 2006 RDP1...
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Section 8 REPLACEMENT DECALS AND INFORMATION PLATES Ref. Part Description 483206 Decal, Danger-Spinning Blades 482286 Decal, Warning-Rotating Blades 483199 Decal, 48V 483200 Decal 52V 481425 Decal, Oil 483044 Decal, Patents 482100 Decal, Traction Control 481971 Decal, Heavy Duty Commercial 48404 Decal, Metalcraft - Made in USA 481039 Decal, Belt Cover...
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(Two year warranty exclude fittings, hoses, drive belts). The repair or replacement of the hydraulic pump or hydraulic motor will be at the option of Scag Power Equipment. This warranty does not cover any mower that has been subject to misuse, neglect, negligence, or accident, or that has been operated in any way contrary to the operating instructions as specified in the Operator’s Manual.
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(Piezas y mano de obra) (La garantía de dos años no incluye las conexiones, mangueras, correas de transmisión). La reparación o el reemplazo de la bomba hidráulica o el motor hidráulico estarán sujetos a discreción de Scag Power Equipment. Esta garantía no cubre ningún cortacésped que haya sido sometido a uso indebido, descuido, negligencia o accidente, o que se haya operado de manera distinta a la especificada en el manual del operador.