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MODEL STC
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.
© 2003
SCAG POWER EQUIPMENT
DIVISION OF METALCRAFT OF MAYVILLE, INC.
PART NO. 03119
PRINTED 4/03
PRINTED IN USA
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Resumen de contenidos para Scag Power Equipment STC Serie

  • Página 1 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. © 2003 PART NO. 03119 SCAG POWER EQUIPMENT PRINTED 4/03 DIVISION OF METALCRAFT OF MAYVILLE, INC. PRINTED IN USA...
  • Página 2 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.
  • Página 3: Tabla De Contenido

    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 Maintenance Considerations ....................6 Safety and Instructional Decals ....................7...
  • Página 4: Subject

    TABLE OF CONTENTS (CONT'D) SUBJECT PAGE Section 6 - Adjustments Parking Brake Adjustment ....................20 Travel Adjustments ....................... 21 Throttle Control and Choke Adjustments ................22 Belt Adjustment ........................22 Belt Alignment ........................22 Cutter Deck Adjustments ..................... 23 Section 7 - Maintenance Maintenance Chart .......................
  • Página 5: Introduction

    If additional information or service is needed, contact your obligation. 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 service this equipment and provide prompt and efficient service in The “Right”...
  • Página 6: Symbols

    ISO Symbols CE Mark SYMBOL DESCRIPTION SYMBOL DESCRIPTION Choke Transmission Parking Brake Spinning Blade 48071S On/Start Spring Tension on Idler Off/Stop WARNING Falling Hazard FALLING HAZARD USE ONLY SCAG APPROVED RIDING ATTACHMENTS SEE OPERATOR'S MANUAL 481109...
  • Página 7 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...
  • Página 8: Introduction

    Section 2 SAFETY INFORMATION 2.1 INTRODUCTION Your mower is only as safe as the operator. Carelessness The signal word “DANGER” denotes that an extremely or operator error may result in serious bodily injury or death. Hazard control and accident prevention are dependent upon hazardous situation exists on or near the machine that could result in high probability of death or irreparable injury if the awareness, concern, prudence, and proper training of...
  • Página 9: Operation Considerations

    Section 2 2.3 BEFORE OPERATION 11. Keep flammable objects (cigarettes, matches, etc.), open flames and sparks away from the fuel tank and CONSIDERATIONS (CONT'D) fuel container. 5. DO NOT wear loose fitting clothing that could get 12. Equipment must comply with the latest requirements tangled in moving parts.
  • Página 10: Maintenance Considerations

    Section 2 2.4 OPERATION CONSIDERATIONS 14. The machine and attachments should be stopped and inspected for damage after striking a foreign object, (CONT'D) and damage should be repaired before restarting and operating the machine. 3. To prevent tipping or loss of control, start and stop smoothly, avoid unnecessary turns and travel at reduced 15.
  • Página 11: Safety And Instructional Decals

    Section 2 2.6 SAFETY AND INSTRUCTIONAL DECALS 481039 482285 481568 482286 482290 482709 482576 STC Safety Decals...
  • Página 12: Section 3 - Specifications

    Section 3 SPECIFICATIONS 3.1 ENGINE General Type ................Heavy Duty Industrial/Commercial Gasoline Brand ..................Kawasaki, Kohler, Honda Horsepower ................19 HP (Spec.#FH601V) (Scag Model STC48A-19KA) 20 HP (Spec.#CV20S) (Scag Model STC48A-20CV) 21 HP (Spec.#FH641V) (Scag Model STC48A-21KA, STC52A-21KA) 23 HP (Spec.#FH680V) (Scag Model STC52A-23KA, STC61A-23KA) 24 HP (Spec.
  • Página 13 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.
  • Página 14: Controls And Instrument Identification

    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.
  • Página 15: Safety Interlock System

    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. It can be used to keep track of maintenance intervals and the amount of time required to perform various tasks.
  • Página 16: Initial Run-In Procedures

    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 10 Hours) hold the key in the START position for more than 15 seconds at a time.
  • Página 17: Engaging The Deck Drive

    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.
  • Página 18: Hillside Operation

    Section 4 3. To disengage the deck drive, push the switch in to 4.9 AFTER OPERATION the disengage position. 1. Wash the entire mower after each use. Do not use 4. Always operate the engine at full throttle to properly high pressure spray or direct the spray onto maintain cutting speed.
  • Página 19: Moving Mower With Engine Stopped

    Section 4 4.11 MOVING MOWER WITH ENGINE STOPPED To “free-wheel” or move the mower around without the engine running, place the dump valve levers in the FREE-WHEEL position (Figure 4-2, Page 11). Disengage the parking brake and move the mower by hand.
  • Página 20: Adjusting Cutting Height

    Section 4 4.13 ADJUSTING CUTTING HEIGHT HEIGHT ADJUSTMENT PEDAL The mower deck can be adjusted from a height of 1-inch to 5-1/2 inches at 1/4-inch intervals. To adjust the cutting height: WARNING: LANYARD Do not adjust the cutting height with the mower blades rotating.
  • Página 21: Section 5 - Troubleshooting Cutting Conditions

    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...
  • Página 22 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...
  • Página 23 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...
  • Página 24: Parking Brake Adjustment

    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.
  • Página 25: Travel Adjustments

    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.
  • Página 26: Tracking Adjustment

    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.
  • Página 27: Cutter Deck Adjustments

    Section 6 6.6 CUTTER DECK ADJUSTMENTS 2. Loosen the elastic stop nut and move the bolt up or down in the slot to adjust the cutter deck until the distance from the top of the cutter deck to the floor Cutter deck level, pitch and height are set at the factory.
  • Página 28: Custom-Cut Baffle 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 index. Release the deck from the transport positon The cutter deck height adjustment is made to ensure that and allow the deck to move to the 3"...
  • Página 29 Section 6 To adjust the Custom-Cut Baffle height: CARRIAGE BOLT 1. Place the cutter deck in the transport position. 2. Remove the hardware securing the Custom-Cut Baffle to the cutter deck. (See Figure 6.7). -NOTE- 2002 CCB - 3-1/2" Setting BOTTOM SET OF HOLES FLATWASHER ELASTIC STOP...
  • Página 30: Maintenance Chart

    Section 7 MAINTENANCE 7.1 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS HOURS Break-In 40 100 200 500 Procedure Comments (First 10) Check all hardware for tightness Check hydraulic oil level See paragraph 7.3 Check all belts for proper alignment See paragraph 7.8 Change engine oil and filter See paragraph 7.4 (First 5)
  • Página 31: Lubrication Fitting Points

    Section 7 MAINTENANCE CHART - RECOMMENDED SERVICE INTERVALS (CONT'D) HOURS Break-In 40 100 200 500 Procedure Comments (First 10) Apply grease to fittings See paragraph 7.2 Check hardware for tightness Change engine oil filter See paragraph 7.4 Check hydraulic oil level See paragraph 7.3 Replace engine fuel filter See paragraph 7.5...
  • Página 32 Section 7 GREASE FITTING LUBRICATION Lubricant Interval Lithium MP White Grease 2125 (40 Hours/Weekly) Chassis Grease (100 Hours/Bi-monthly) Chassis Grease (200 Hours/Monthly) Chassis Grease (500 Hours/Yearly) Figure 7.1 Lubrication Fitting Points...
  • Página 33: Hydraulic System

    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.
  • Página 34: Engine Oil

    Section 7 4. Fill the reservoir to 3-1/4" inches from the top of the filler neck with SAE 20W50 motor oil. 5. Replace the reservoir fill cap. Start the engine and ENGINE OIL FILLER drive forward and backward for two minutes. Check the oil level in the reservoir.
  • Página 35: Fuel Filter

    Section 7 B. Replacing In-Line Fuel Filter Element 2. Install a new fuel filter. Be sure it is installed in the proper direction. Secure to the fuel hose using the two clamps. The in-line fuel filter (Figure 7-7, Figure 7-8 ) should be replaced after every 500 hours of operation or annually, 7.6 ENGINE AIR CLEANER whichever occurs first.
  • Página 36 Section 7 WARNING: WARNING: Battery posts, terminals, and related acces- Electric storage battery fluid contains sulfuric sories contain lead and lead compounds, acid which is POISON and can cause SEVERE chemicals known to the State of California CHEMICAL BURNS. Avoid contact of fluid to cause cancer and reproductive harm.
  • Página 37: Drive Belts

    Section 7 WARNING: WARNING: BATTERIES PRODUCE EXPLOSIVE Always wear proper hand and eye protection GASES. Charge the battery in a well when working with cutter blades. ventilated space 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.
  • Página 38: Tires

    Section 7 HEX NUT-TORQUE Angle Blade Back TO 75 LB-FT Do Not Cut In SPINDLE CUTTER SHAFT X Must NOT Exceed DECK 1/3 Blade Width 2002SGB033 Figure 7-9 Blade Sharpening HEX HEAD BOLT / NUT 2. Check the balance of the blade. If the blades are out SPINDLE of balance, vibration and premature wear can occur.
  • Página 39: Body, Deck And Upholstery

    Section 7 7.11 BODY, DECK, AND UPHOLSTERY CAUTION: Do not wash any portion of the equipment while it is hot. Do not wash the engine; use compressed air. 1. After each use, wash the mower and cutter deck. Use cold water and automotive cleaners. Do not use pressure cleaners.
  • Página 40: Stc48A, Stc52A Cutter Deck

    Section 8 48A”& 52A" CUTTER DECKS 55 14 53 29 21 54 64 60 62 61 59 58 66 63 6 7 8 5 25 STC 2003 CD4852...
  • Página 41 Section 8 48A”& 52A" CUTTER DECKS Ref. Part Ref. Part No. No. Description 48 52 No. No. Description 48 52 461491 Cutter Deck Advantage 43294 Housing, Spindle 461500 Cutter Deck Advantage 43312 Spacer, Outside 04003-04 Bolt, Carr. 5/16-18 x 1” 43296 Spacer, Inside 04019-04...
  • Página 42: Cutter Deck

    Section 8 61A" CUTTER DECK 55 14 53 29 21 54 64 60 62 61 59 58 66 63 "A" "A" 6 7 8 5 25 STC 2003 CD61...
  • Página 43 Section 8 61A" CUTTER DECK Ref. Part Ref. Part No. No. Description No. No. Description 461591 Cutter Deck Advantage 43296 Spacer, Inside 04003-04 Bolt, Carr. 5/16-18 x 1” 481025 Seal, Lower 04019-04 Nut, 3/8-16 Serrated Flange 43297 Bushing, Bottom 481625-01 Wing Nut, 3/8-16 481035 Nut, Special 1-1/16 - 18 481632...
  • Página 44: Cutter Deck Controls

    Section 8 CUTTER DECK CONTROLS CUTTER DECK STC 2003 CDC...
  • Página 45 Section 8 CUTTER DECK CONTROLS Ref. Part Description 482624 Rod, Deck Lift Linkage 04020-28 Nut, Jam 1/2-20 LH Thread 481766 Rod End, 1/2-20 Female Thread 04050-10 Retaining Ring, 1/2” External “E” 482429 Slide, Deck Height Adjust 43487 Pin, Deck Lift 423463 Bracket, Cutting Height Adjustment 04009-02...
  • Página 46: Sheet Metal Components

    Section 8 SHEET METAL COMPONENTS 61" Cutter Deck Only 23 3 29 2 5 18 19 7 8 20 30 1 STC 2003 SMC...
  • Página 47 Section 8 SHEET METAL COMPONENTS Ref. Part Ref. Part Description Description 04021-09 Nut, Elastic Stop 3/8-16 461612 Main Frame Assembly w/decals 04001-19 Bolt, Hex Head 3/8-16 x 1” 04001-73 Bolt, Hex Head 5/16-18 x 3-3/4” 48566 Cable, Seat Stop 482632 Cushion, Back 451470 Weldment, Caster Support...
  • Página 48: Drive System Components

    Section 8 DRIVE SYSTEM COMPONENTS STC 2003 DSC...
  • Página 49 Section 8 DRIVE SYSTEM COMPONENTS Ref. Part No. No. Description 04021-09 Nut, Elastic Stop 3/8-16 04019-04 Nut, Serrated Flange 3/8-16 461706 Spring, Pump Idler 43286 Spacer 04001-22 Bolt, Hex Head 3/8-16 x 2-3/4” 461603 Idler Arm Assy., Pump Drive 04063-14 Key, 5 x 5 x 25mm 482531 Belt, Transmission...
  • Página 50: Engine And Attaching Parts - Kawasaki & Kohler

    Section 8 ENGINE AND ATTACHING PARTS (KAWASAKI & KOHLER) STC 2003 EAPKA...
  • Página 51 Section 8 ENGINE AND ATTACHING PARTS (KAWASAKI & KOHLER) Ref. Part Description 19KA 20CV 21KA 23KA 25KA 482488 Engine, Kawasaki (FH601V-AS21) 482492 Engine, Kohler (PS-65584) 482489 Engine, Kawasaki (FH641V-AS18) 482490 Engine, Kawasaki (FH680V-AS19) 482491 Engine, Kawasaki (FH721V-AS17) 423770 Bumper, Rear 423483 Shield, Rear 41029...
  • Página 52: Engine And Attaching Parts - Honda

    Section 8 ENGINE AND ATTACHING PARTS (HONDA) 22 23 STC 2003 EAPHN...
  • Página 53 Section 8 ENGINE AND ATTACHING PARTS (HONDA) Ref. Part Description 482706 Engine, Honda 24 HP (GXV670TAF2) 423554 Bumper, Rear 423483 Shield, Rear 04019-04 Nut, Serr. Flange 3/8-16 482767 Extension, Oil Drain 2.7” 04003-23 Bolt, Carr. 3/8-16 x 1” 482768 Adapter, Oil Filter 482739 Muffler, Honda 423572...
  • Página 54: Steering Components

    Section 8 STEERING COMPONENTS 29, 29A To Pump STC 2002 SSC...
  • Página 55 Section 8 STEERING COMPONENTS Ref. Part No. No. Description 482340 Grip, Control Lever 461386 Handle Bar (Includes item 1) 04001-32 Bolt, Hex Head 3/8-16 x 1-1/4” 04030-04 Lock Washer, 3/8” 04041-07 Flatwasher, 3/8-.391 x .938 x .105 04040-15 Flatwasher, 5/16-.375 x .875 x .083 04060-01 Roll Pin, Spring 5/32 x 3/4”...
  • Página 56: Brake Components

    Section 8 BRAKE COMPONENTS 40 16 17 35 31 11 3 15 14 13 12 STC 2002 BSC...
  • Página 57 Section 8 BRAKE COMPONENTS Ref. Part No. No. Description 04019-04 Nut, Serr. Flange 3/8-16 48807 Spring 04001-08 Bolt, Hex Head 5/16-18 x 3/4” 04001-163 Bolt, Hex Head 1/2-13 x 3-3/4” 04001-52 Bolt, Hex Head 1/2-13 x 2-1/2” 04021-19 Nut, 1/2-13 Center Lock 481529 Wheel Motor Ross 04063-25...
  • Página 58: Fuel And Hydraulic System

    Section 8 FUEL AND HYDRAULIC SYSTEM *61" Cutter Deck Only To Reservoir Fitting "F" From Pump Fitting "F" 3 55 20 19 45 46 18 19 33 47 48 ENGINE 51 42 4 36 37 48 47 49 35 32 54 44 31 43 STC 2003 FHS...
  • Página 59 Section 8 FUEL AND HYDRAULIC SYSTEM Ref. Part Ref. Part No. No. Description No. No. Description 482643 Pump, BDP-10A-316 (L.H.) 48058 Fuel Hose, 1/4 ID 482644 Pump, BDP-10A-419 (R.H.) 423573 Bracket Fuel Valve 482266-01 Elbow, 90 Degree 9/16 O-Ring x 3/8 Hose 48059-01 Clamp, Fuel Hose 1/4 Hose ID 48572-02...
  • Página 60: Electrical System (Kawasaki & Kohler)

    Section 8 ELECTRICAL SYSTEM STC 2002 ESKA...
  • Página 61 Section 8 ELECTRICAL SYSTEM Ref. Part Description 48023 Hourmeter 48298 Fuse, 20 amp 48017-02 Key, Ignition 48017-04 Nut, Hex 5/8-32 48017-03 Lockwasher, 5/8” Internal 461715 Electric PTO Clutch (48A & 52A) 461715 Electric PTO Clutch, Ogura GT3 (61A) 48798 Switch, Ignition 481687 Switch, PTO 48788...
  • Página 62: Hydraulic Pump Assembly

    Section 8 HYDRAULIC PUMP ASSEMBLY PORT "A" SIDE PORT "B" SIDE...
  • Página 63 Section 8 HYDRAULIC PUMP ASSEMBLY Ref. Part Description HG 70516 Housing Kit HG 70573 End Cap Kit HG 50641 Straight Headless Pin HG 50969 Hex Flange Bolt, M8-1.25 x 60mm HG 51232 Housing O-Ring HG 2513027 Charge Pump Kit HG 50273 Gerotor Assembly HG 9004101-1340 O-Ring HG 50095...
  • Página 64: Replacement Decals

    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 STC 2002 RDP1...
  • Página 65 Section 8 REPLACEMENT DECALS AND INFORMATION PLATES Ref. Part Description 482285 Decal, Danger-Spining Blades 482286 Decal, Warning-Rotating Blades 481953 Decal, 48A 481954 Decal 52A 481425 Decal, Oil 48656 Decal, Patents 482100 Decal, Traction Control 481971 Decal, Heavy Duty Commercial 48404 Decal, Metalcraft - Made in USA 481039 Decal, Belt Cover...
  • Página 66: Electrical Schematic (Kawasaki & Kohler)

    Section 8 ELECTRICAL SCHEMATIC - KAWASAKI, KOHLER & HONDA GROUND SOLENOID RED/YEL STARTER ENGINE HARNESS ELECTRIC ENGINE CLUTCH GRN/ RH NEUTRAL LH NEUTRAL SWITCH SWITCH RED/WHT SEAT SWITCH INSTRUMENT PANEL BRAKE INTERLOCK SWITCH SWITCH GRN/BLK YEL/RED PINK LT/BLU HOURMETER MODULE PLUG RED/YEL LT/BLU...
  • Página 67 * Engines and electric starters are covered by the engine manufacturer’s warranty period. * Major drive system components are warranted for two (2) years by Scag Power Equipment. (Parts and labor 1st year; Parts only 2nd year) (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.

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