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Scag Power Equipment STC Operator's Manual

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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.
PART NUMBER 03105

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Summary of Contents for Scag Power Equipment STC

  • Page 1 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.
  • Page 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.

  • Page 3: Table Of Contents

    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...

  • Page 4: Subject Page

    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 .......................

  • Page 5: Section 1 - General Information

    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”...

  • Page 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...

  • Page 7: Symbols

    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...

  • Page 8: Section 2 - Safety Information

    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...

  • Page 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.

  • Page 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.

  • Page 11: Safety And Instructional Decals

    Section 2 2.6 SAFETY AND INSTRUCTIONAL DECALS WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR'S MANUAL 481039 FORWARD REVERSE 481568...

  • Page 12: Section 3 - Specifications

    Section 3 SPECIFICATIONS 3.1 ENGINE General Type ................Heavy Duty Industrial/Commercial Gasoline Brand ..................Kawasaki, Kohler 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) Type 4 Cycle Gasoline, Twin Cylinder, Horizontal Shaft Cylinders ..................

  • Page 13: Cutter Deck

    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.

  • Page 14: Section 4 - Operating Instructions

    CUTTING HEIGHT ADJUSTMENT LEFT STEERING CONTROL PARKING BRAKE ENGINE THROTTLE CONTROL MOWER DECK SWITCH DUMP VALVE RIGHT STEERING IGNITION CONTROL SWITCH FUSES ENGINE CHOKE CONTROL FUEL GAUGE HOUR METER FUEL SWITCHING VALVE STC 2002 CAI Figure 4-1 Controls and Instruments...

  • Page 15: Safety Interlock System

    7. Left Steering Control (Figure 4-1). Used to control the mower's left wheel when traveling STC 2001 DVC forward or reverse. Figure 4-2 Dump Valve Control 8. Right Steering Control (Figure 4-1). Used to 14.

  • Page 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.

  • Page 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.

  • Page 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.

  • Page 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.

  • Page 20: Adjusting Cutting Height

    Do not adjust the cutting height with the mower blades rotating. Disengage the power to the cutter blades and then adjust cutting height. STC 2001 ACH 1. Disengage the power to the cutter blades. Figure 4-5 Adjusting Cutting Height 2. Push the cutting height adjustment foot pedal all the 4.14 Towing (optional hitch accessory)

  • Page 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...
  • Page 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...
  • Page 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...

  • Page 24: Section 6 - Adjustments

    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.

  • Page 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.

  • Page 26: Throttle Control And Choke Adjustments

    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.

  • Page 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.
  • Page 28 CONTROL ROD A. 3" Position - baffle removed. (See Figure 6.8). With STC 2001 ACH (Fig. 6-6) the baffle removed, the Advantage cutter deck will Figure 6-5. Cutter Deck Height Adjustment deliver the best quality-of-cut in very tall, wiry, tough to cut grass.
  • Page 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...

  • Page 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)

  • Page 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...
  • Page 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...

  • Page 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.

  • Page 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.

  • Page 35: Engine Air Cleaner

    Section 7 1. Close the shutoff valve. Remove the two clamps 7.6 ENGINE AIR CLEANER securing the fuel filter to the fuel hose. Remove the fuel filter, noting the proper direction. A. Cleaning and/or Replacing Air Cleaner Element 2. Install a new fuel filter. Be sure it is installed in the proper direction.
  • Page 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.

  • Page 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.

  • Page 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.

  • Page 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.

  • Page 40: Section 8 - Replacement Parts Stc48A, Stc52A Cutter Deck

    Section 8 48A”& 52A" CUTTER DECKS 55 14 53 29 21 54 64 60 62 61 59 58 66 63 23 66 6 7 8 5 25 STC 2002 CD4852...
  • Page 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...

  • Page 42: Cutter Deck Controls

    Section 8 CUTTER DECK CONTROLS 48A” & 52A" DECKS CUTTER DECK STC 2002 CDC...
  • Page 43 Section 8 CUTTER DECK CONTROLS 48A” & 52A" DECKS Ref. Part Description 48A” 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...

  • Page 44: Sheet Metal Components

    Section 8 SHEET METAL COMPONENTS 23 3 29 2 5 18 19 7 8 20 30 1 STC 2002 SMC...

  • Page 45: Sheet Metal Components

    Section 8 SHEET METAL COMPONENTS Ref. Part Ref. Part Description Description 423557 Footplate 461522 Main Frame Assembly w/decals 04021-09 Nut, Elastic Stop 3/8-16 04001-73 Bolt, Hex Head 5/16-18 x 3-3/4” 04001-19 Bolt, Hex Head 3/8-16 x 1” 482632 Cushion, Back 48566 Cable, Seat Stop 04019-04...

  • Page 46: Drive System Components

    Section 8 DRIVE SYSTEM COMPONENTS 4 5 31 STC 2002 DSC...
  • Page 47 Section 8 DRIVE SYSTEM COMPONENTS Ref. Part No. No. Description 04021-09 Nut, Elastic Stop 3/8-16 04021-05 Nut, Center Lock 3/8-16 461706 Spring 43572 Spacer 04001-46 Bolt, Hex Head 3/8-16 x 2-1/4” 461523 Idler Arm Assy., Pump Drive 04063-14 Key, 5 x 5 x 25mm 482531 Belt, Transmission 481048...

  • Page 48: Engine And Attaching Parts

    Section 8 ENGINE AND ATTACHING PARTS STC 2002 EAPKA...

  • Page 49: Engine And Attaching Parts

    Section 8 ENGINE AND ATTACHING PARTS Ref. Part Description 19KA 20CV 21KA 23KA 482488 Engine, Kawasaki (FH601V-AS21) 482492 Engine, Kohler (PS-65584) 482489 Engine, Kawasaki (FH641V-AS18) 482490 Engine, Kawasaki (FH680V-AS19) 423554 Bumper, Rear 423483 Shield, Rear 04019-04 Nut, Serr. Flange 3/8-16 482510 Extension, Oil Drain 2.3”...

  • Page 50: Steering Components

    Section 8 STEERING COMPONENTS 29, 29A To Pump STC 2002 SSC...
  • Page 51 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 Washer 04060-01 Roll Pin, Spring 5/32 x 3/4” 422372 Bar, Control Lever 04021-09...

  • Page 52: Brake Components

    Section 8 BRAKE COMPONENTS 40 16 17 35 31 11 3 15 14 13 12 STC 2002 BSC...
  • Page 53 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...

  • Page 54: Fuel And Hydraulic System

    Section 8 FUEL AND HYDRAULIC SYSTEM 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 2002 FHS...
  • Page 55 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...

  • Page 56: Electrical System (Kawasaki & Kohler)

    Section 8 ELECTRICAL SYSTEM (KAWASAKI & KOHLER) STC 2002 ESKA...

  • Page 57: Electrical System (Kawasaki & Kohler)

    Section 8 ELECTRICAL SYSTEM (KAWASAKI & KOHLER) 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 48798 Switch, Ignition 481687 Switch, PTO 48788 Relay 04031-01 Lock Washer, #10 External Tooth 04020-01 Nut, Hex #10-32...

  • Page 58: Hydraulic Pump (Bdp-10A)

    Section 8 HYDRAULIC PUMP ASSEMBLY PORT "A" SIDE PORT "B" SIDE...
  • Page 59 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...

  • Page 60: 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...

  • Page 61: Replacement Decals

    482566 Decal, Cutting Height Bottom Row of Holes 482578 Decal, Tiger Cub 482550 Decal, Seat Support 482579 Decal, Rear Bumper 482166 Decal, Front Footplate 482165 Decal, Discharge Chute 482549 Decal, Cutting Height Top Row of Holes 482166 STC 2002 RDP2...

  • Page 62: Electrical Schematic (Kawasaki & Kohler)

    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 MOWER ENGAGE SWITCH GRN/WHT GRN/BLK RED/YEL RELAY YEL/RED RED/YEL FUSES BATTERY 20 AMP STC 2K SKH...
  • Page 63 * 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.
  • Page 64 © 2001 PART NO. 03105 SCAG POWER EQUIPMENT PRINTED 11/01 DIVISION OF METALCRAFT OF MAYVILLE, INC. PRINTED IN USA...

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