Scag Power Equipment STC Operator's Manual
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Scag Power Equipment STC Operator's Manual

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All manuals and user guides at all-guides.com
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 03079

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  • Page 1 All manuals and user guides at all-guides.com 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.
  • Page 2 All manuals and user guides at all-guides.com 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.

  • Page 3: Table Of Contents

    All manuals and user guides at all-guides.com 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 ......................3 Maintenance Considerations ....................4...

  • Page 4: Subject Page

    All manuals and user guides at all-guides.com TABLE OF CONTENTS (CONT'D) SUBJECT PAGE Section 6 - Adjustments Parking Brake Adjustment ....................18 Travel Adjustments ......................18 Throttle Control and Choke Adjustments ................20 Belt Adjustment ........................20 Belt Alignment ........................20 Cutter Deck Adjustments .....................

  • 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: Section 2 - Safety Information

    All manuals and user guides at all-guides.com 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. hazardous situation exists on or near the machine that could Hazard control and accident prevention are dependent upon result in high probability of death or irreparable injury if...

  • Page 7: Operation Considerations

    All manuals and user guides at all-guides.com Section 2 11. Keep flammable objects (cigarettes, matches, etc.), 2.3 BEFORE OPERATION 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.

  • Page 8: Maintenance Considerations

    All manuals and user guides at all-guides.com Section 2 14. The machine and attachments should be stopped and 2.4 OPERATION CONSIDERATIONS inspected for damage after striking a foreign object, (CONT'D) and damage should be repaired before restarting and operating the machine. 3.

  • Page 9: Safety And Instructional Decals

    All manuals and user guides at all-guides.com Section 2 2.6 SAFETY AND INSTRUCTIONAL DECALS WARNING DANGER INSTALL BELT COVER BEFORE OPERATING MACHINE SPINNING BLADE READ OPERATOR'S MANUAL 481039 KEEP CLEAR FORWARD CONTACT CAN INJURE 48071 REVERSE WARNING 481568 ROTATING BLADES AND BELTS CAUTION KEEP HANDS, FEET &...

  • Page 10: Section 3 - Specifications

    All manuals and user guides at all-guides.com Section 3 SPECIFICATIONS 3.1 ENGINE General Type ................Heavy Duty Industrial/Commercial Gasoline Brand ..................Kawasaki, Kohler Horsepower ................17 HP (Spec.#FH500V) (Scag Model STC40-17KA) 19 HP (Spec.#FH601V) (Scag Model STC48-19KA, STC48A-19KA) 20 HP (Spec.#CV20S) (Scag Model STC48-20CV, STC48A-20CV) 21 HP (Spec.#FH641V) (Scag Model STC48-21KA, STC48A-21KA, STC52A-21KA) 23 HP (Spec.#FH680V) (Scag Model STC52A-23KA)
  • Page 11 All manuals and user guides at all-guides.com Section 3 -NOTE- 3.3 TRACTOR (CONT'D) 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 cutting conditions.

  • Page 12: Section 4 - Operating Instructions

    All manuals and user guides at all-guides.com Section 4 OPERATING INSTRUCTIONS 1. Ignition Switch (Figure 4-1). Used to start the engine and has three positions; OFF, ON, and CAUTION: START. Do not attempt to operate this mower unless you have read this manual. Learn the location and 2.

  • Page 13: Safety Interlock System

    All manuals and user guides at all-guides.com Section 4 5. Hourmeter (Figure 4-1). Indicates the number of 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.

  • Page 14: Starting The Engine

    All manuals and user guides at all-guides.com Section 4 2. Change the engine oil and oil filter after the first 5 6. Turn the ignition key to the START position and hours of operation. (See Section 7.4.) release the key as soon as the engine starts. Do not hold the key in the START position for more than 15 seconds at a time.

  • Page 15: Engaging The Deck Drive

    All manuals and user guides at all-guides.com 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 futher the back, the quicker the mower will turn left.

  • Page 16: Hillside Operation

    All manuals and user guides at all-guides.com Section 4 3. To disengage the deck drive, push the switch in to 5. Turn the ignition key to the OFF position and remove the disengage position. the key. 4. Always operate the engine at full throttle to properly 4.9 AFTER OPERATION maintain cutting speed.

  • Page 17: Removing Clogged Material

    All manuals and user guides at all-guides.com Section 4 5. When mowing wet or tall grass, mow the grass 4.10 REMOVING CLOGGED MATERIAL twice. Raise the mower to the highest setting for the first pass and then make a second pass to the desired height.

  • Page 18: Adjusting Cutting Height

    All manuals and user guides at all-guides.com Section 4 4.13 ADJUSTING CUTTING HEIGHT LANYARD PIN The mower deck can be adjusted from a height of 1-inch to 5-1/2 inches at 1/2-inch intervals. To adjust the cutting height: WARNING: Do not adjust the cutting height with the mower blades rotating.

  • Page 19: Section 5 - Troubleshooting Cutting Conditions

    All manuals and user guides at all-guides.com Section 5 TROUBLESHOOTING CUTTING CONDITIONS CAUSE CURE CONDITION Low engine RPM Run engine at full RPM Stringers - Occasional Blades of Uncut Ground speed too fast Slow speed to adjust for conditions Grass Wet grass Cut grass after it has dried out Dull blades, incorrect sharpening...
  • Page 20 All manuals and user guides at all-guides.com Section 5 TROUBLESHOOTING (CONT'D) CAUSE CURE CONDITION Lift worn from blade Replace blade Uneven Cut on Flat Ground - Wavy Blade upside down Mount with cutting edge toward High-Low ground Appearance, Scalloped Cut, or Deck plugged, grass accumulation Clean underside of deck Rough Contour...
  • Page 21 All manuals and user guides at all-guides.com Section 5 TROUBLESHOOTING (CONT'D) CAUSE CURE CONDITION Low tire pressures Check and adjust pressures Scalping - Blades Hitting Dirt or Ground speed too fast Slow speed to adjust for conditions Cutting Very Close to the Ground Cutting too low May need to reduce ground speed,...

  • Page 22: Section 6 - Adjustments

    All manuals and user guides at all-guides.com 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 adjustment, please contact your authorized Scag Do not operate the mower if the parking brake is dealer.
  • Page 23 All manuals and user guides at all-guides.com Section 6 B. The steering control levers are in the full forward 4. Adjust the RH wheel by loosening the jam nuts on position and the mower pulls to one side or the the steering control rod and turning the rod until the other when traveling in a forward direction.

  • Page 24: Throttle Control And Choke Adjustments

    All manuals and user guides at all-guides.com 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 25: Cutter Deck Adjustments

    All manuals and user guides at all-guides.com Section 6 2. Loosen the elastic stop nut and move the bolt up or 6.6 CUTTER DECK ADJUSTMENTS 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 26 All manuals and user guides at all-guides.com Section 6 3. Check the cutter deck cutting height by placing the Cutter Deck Height 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"...

  • Page 27: Maintenance Chart

    All manuals and user guides at all-guides.com 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...

  • Page 28: Lubrication Fitting Points

    All manuals and user guides at all-guides.com 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...
  • Page 29 All manuals and user guides at all-guides.com 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 ) 390S0145A...

  • Page 30: Hydraulic System

    All manuals and user guides at all-guides.com Section 7 7.3 HYDRAULIC SYSTEM B. Changing Hydraulic Oil The hydraulic oil should be changed after every 500 hours A. Checking Hydraulic Oil Level or annually, whichever occurs first. The oil should also be changed if the color of the fluid has become black or milky.

  • Page 31: Engine Oil

    All manuals and user guides at all-guides.com Section 7 C. Changing Engine Oil Filter After the first 5 hours of operation, replace the engine oil filter. Thereafter, replace the oil filter after every 200 hours of operation or every month, whichever occurs first. Refer to Engine Operator’s Manual for instructions.

  • Page 32: Engine Air Cleaner

    All manuals and user guides at all-guides.com Section 7 1. Close the shutoff valve (located on the left side for the 7.6 ENGINE AIR CLEANER KA model, right side for the KH model). Remove the two clamps securing the fuel filter to the fuel hose. A.

  • Page 33: Battery

    All manuals and user guides at all-guides.com Section 7 7.7 BATTERY WARNING: A. Checking Electrolyte Level and Cleaning Electric storage battery fluid contains sulfuric Battery acid which is POISON and can cause SEVERE CHEMICAL BURNS. Avoid contact of fluid After every 40 hours of operation or weekly, whichever with eyes, skin, or clothing.

  • Page 34: Drive Belts

    All manuals and user guides at all-guides.com 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.

  • Page 35: Tires

    All manuals and user guides at all-guides.com Section 7 HEX NUT-TORQUE ANGLE BLADE BACK TO 75 LB-FT DO NOT CUT IN SPINDLE CUTTER SHAFT DECK "X" MUST NOT EXCEED HEX HEAD 1/3 BLADE WIDTH BOLT / NUT 390S0139 SPINDLE Figure 7-9 Blade Sharpening ASSEMBLY CUTTER BLADE SPACER...

  • Page 36: Body, Deck, And Upholstery

    All manuals and user guides at all-guides.com 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.
  • Page 37 All manuals and user guides at all-guides.com Section 8...

  • Page 38: 40" Cutter Deck

    All manuals and user guides at all-guides.com Section 8 40" CUTTER DECK 44 61 63 STC 2K CD40...
  • Page 39 All manuals and user guides at all-guides.com Section 8 40" CUTTER DECK Ref. Part Ref. Part Description Description 481035 Nut, Special 1-1/16-18 461309 Cutter Deck (Includes decals) 48114-04 Grease Fitting 04001-01 Bolt, Hex Head 1/2-20 x 3/4” 48677 Valve, Grease Relief 04020-09 Nut, 5/8-11 UNC 481050...

  • Page 40: 48A, 52A Cutter Deck

    All manuals and user guides at all-guides.com Section 8 48", 48A”& 52A" CUTTER DECKS 59 60 STC 2K CD4852...
  • Page 41 All manuals and user guides at all-guides.com Section 8 48", 48A”& 52A" CUTTER DECKS Ref. Part Ref. Part No. No. Description 48 52 No. No. Description 48 52 48677 Valve, Grease Relief 461310 Cutter Deck (Includes decals) 43294 Housing, Spindle 461311 Cutter Deck Advantage (Not Shown) 43312...

  • Page 42: Cutter Deck Controls

    All manuals and user guides at all-guides.com Section 8 CUTTER DECK CONTROLS 40", 48”, 48A” & 52A" DECKS CUTTER DECK STC 2K CDC...
  • Page 43 All manuals and user guides at all-guides.com Section 8 CUTTER DECK CONTROLS 40", 48”, 48A” & 52A" DECKS Ref. Part Description 40” 48” 48A” 52A” 481764 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”...

  • Page 44: Sheet Metal Components

    All manuals and user guides at all-guides.com Section 8 SHEET METAL COMPONENTS 46 27 44 42 STC 2K SMC...
  • Page 45 Bolt, Hex Head 3/8-16 x 1” 451262 Plate, Engine Mounting 451276 Weldment, Caster Support (STC-40) 451277 Weldment, Caster Support (STC-48) 451278 Weldment, Caster Support (STC-48A & 52A) 481559 Cap, Grease 04021-20 Nut, Elastic Stop 1.0-14 481657 Bearing Set 482028-01 Plug, 1/4-28 481025 Seal, 2.0”...

  • Page 46: Drive System Components

    All manuals and user guides at all-guides.com Section 8 DRIVE SYSTEM COMPONENTS STC 2K DSC...
  • Page 47 All manuals and user guides at all-guides.com 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 481994 Spring 43376 Spacer 04001-159 Bolt, Hex Head 3/8-16 x 2-1/4” Grade 8 461305 Idler Arm, Pump Drive 04063-14...

  • Page 48: Engine And Attaching Parts

    All manuals and user guides at all-guides.com Section 8 ENGINE AND ATTACHING PARTS Kohler Only STC 2K EAPKA...
  • Page 49 All manuals and user guides at all-guides.com Section 8 ENGINE AND ATTACHING PARTS Ref. Part Description 17KA 19KA 20CV 21KA 23KA 482104 Engine, Kawasaki (FH500V-AS26) 482142 Engine, Kawasaki (FH601V-BS11) 482206 Engine, Kohler (PS-65567) 482124 Engine, Kawasaki (FH641V-AS09) 482136 Engine, Kawasaki (FH680V-AS12) 423212 Bumper, Rear 451262...

  • Page 50: Steering Components

    All manuals and user guides at all-guides.com Section 8 STEERING COMPONENTS TO RH PUMP TO LH PUMP STC 2K SSC...
  • Page 51 All manuals and user guides at all-guides.com Section 8 STEERING COMPONENTS Ref. Part No. No. Description 481599 Grip, Control Lever 461037 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 423056 Spacer 04060-01...

  • Page 52: Brake Components

    All manuals and user guides at all-guides.com Section 8 BRAKE COMPONENTS 24 25 STC 2K BSC...
  • Page 53 All manuals and user guides at all-guides.com Section 8 BRAKE COMPONENTS Ref. Part No. No. Description 451224 Brake Lever 04063-20 Key, 1/4 x 1/4 x 1” 482061 Bushing, Self Align 04001-145 Bolt, Hex Head 1/2-13 x 3-1/2” 04001-153 Bolt, Hex Head 1/2-13 x 2-1/4” 04021-19 Nut, 1/2-13 Center Lock 481529...

  • Page 54: Fuel And Hydraulic System

    All manuals and user guides at all-guides.com Section 8 FUEL AND HYDRAULIC SYSTEM ENGINE STC 2K FHS...
  • Page 55 All manuals and user guides at all-guides.com Section 8 FUEL AND HYDRAULIC SYSTEM Ref. Part Ref. Part No. No. Description No. No. Description 48058 Fuel Hose, 1/4 ID 48551 Pump, Sunstrand BDP-10L 117 423204 Bracket Fuel Valve 48350-09 Elbow, 90 Degree 3/8 x 3/8” 48059-01 Clamp, Fuel Hose 1/4 Hose ID 48353-06...

  • Page 56: Electrical System

    All manuals and user guides at all-guides.com Section 8 ELECTRICAL SYSTEM (KAWASAKI & KOHLER) STC 2K ESKA...
  • Page 57 All manuals and user guides at all-guides.com 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 461073 Electric PTO Clutch 48798 Switch, Ignition 481687 Switch, PTO 48788...

  • Page 58: Hydraulic Pump Assembly

    All manuals and user guides at all-guides.com Section 8 HYDRAULIC PUMP ASSEMBLY HYDRAULIC PUMP ASSEMBLY 390S0167...
  • Page 59 All manuals and user guides at all-guides.com Section 8 HYDRAULIC PUMP ASSEMBLY Ref. Part No. No. Description HG 2510065 Housing Kit (Includes Housing, Journal Bearing) HG 2510066 End Cap HG 50641 Straight Headless Pin HG 51055 Hex Head Screw 5/16-18 x 1.0 HG 50381 End Cap O-Ring HG 2513027...

  • Page 60: Replacement Decals

    48404 INSTALL BELT COVER BEFORE CUTTING OPERATING MACHINE HEIGHT READ OPERATOR'S MANUAL 481039 SLOW START CHOKE FAST MOWER DECK PULL OUT TO ENGAGE 482214 PUSH IN TO DISENGAGE 482216 FUEL VALVE FUEL TANK FUEL TANK 482213 482101 STC 2K RDP1...
  • Page 61 Decal, Belt Cover 482214 Decal, Instrument Panel 482213 Decal, Fuel Valve Position 482101 Decal, Cutting Height 482216 Decal, Control Panel 482118 Decal, Seat Support 482219 Decal, Rear Bumper 482166 Decal, Front Footplate 482165 Decal, Discharge Chute 482219 482166 STC 2K RDP2...

  • Page 62: Electrical Schematic (Kawasaki & Kohler)

    LH NEUTRAL RH 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 Scag, are either incompatible with the Scag mower or adversely affect its operation, performance or durability. Scag Power Equipment reserves the right to change or improve the design of any mower without assuming any obliga- tion to modify any mower previously manufactured. All other implied warranties are limited in duration to the one (1) year warranty period or ninety (90) days for mowers used for rental purpose.
  • Page 64 All manuals and user guides at all-guides.com © 2000 PART NO. 03079 SCAG POWER EQUIPMENT PRINTED 12/99 DIVISION OF METALCRAFT OF MAYVILLE, INC. PRINTED IN USA...

This manual is also suitable for:

Stc40-17kaStc48-19kaStc48a-19kaStc48-20cvStc48a-20cvStc48-21ka ... Show all

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