Scag Power Equipment STHM Operator's Manual
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Scag Power Equipment STHM Operator's Manual

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MODEL STHM
PART NUMBER 03033

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Summary of Contents for Scag Power Equipment STHM

  • Page 1 MODEL STHM PART NUMBER 03033...
  • Page 2 WARNING: REMEMBER - YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR! Hazard control and accident prevention are dependent upon the awareness, concern, prudence, and proper training of the personnel involved in the operation, transport, maintenance, and storage of the equipment.

  • Page 3: Signal Words

    SIGNAL WORDS INTRODUCTION GENERAL SAFETY INSTRUCTIONS WARNING: CAUTION:...

  • Page 4: Before Operating

    BEFORE OPERATING WHILE OPERATING...

  • Page 5: Maintenance And Storage

    MAINTENANCE AND STORAGE WARNING: DO NOT operate on steep slopes. To check a slope, attempt to back up it (with the cutter deck down). If the machine can back up the slope without the wheels slipping, reduce speed and use extreme caution. ALWAYS FOLLOW OSHA APPROVED OPERATION.

  • Page 6: Mower Operation

    MOWER OPERATION -NOTE- INITIAL RUN-IN PROCEDURES (FIRST DAY OF USE OR APPROXI- MATELY 10 HOURS) -NOTE-...
  • Page 7 WARNING: DUMP VALVE FREE WHEEL DRIVE -NOTE- SGB006 Figure 3. Dump Valve Location -NOTE- sgb002 Forward Operation - Depress Toe End of Pedal Figure 1 ADJUSTMENTS PARKING BRAKE SGB003 Backward (Reverse) Operation - Depress Heel End of Pedal Figure 2 -NOTE-...

  • Page 8: Neutral Adjustment

    Adjust Nuts SGB028 Figure 4. Parking Brake Adjustment Neutral Control NEUTRAL ADJUSTMENT Spring 9/16" Socket SGB029 Figure 5. Neutral Adjustment -NOTE- DO NOT OVERTIGHTEN. Jam Nut Ball Joint SGB030 Figure 6. Foot Control Pedal Adjustment...

  • Page 9: Belt Tension

    BELT TENSION CAUTION: Stop engine and remove the key from the ignition before making any adjustments. Wait for all moving parts to come to a complete stop before beginning work. -NOTE- Use of Tension Gauge sgb007 Figure 8. Blade Drive Belt Tension Check Deck "J"...

  • Page 10: Cutter Deck Adjustments

    -NOTE- CUTTER DECK ADJUSTMENTS Hex Nut-Torque Cutter Blade to 75 Lb-Ft Spacer 1/4" SGB032 Figure 11. Cutter Deck Height Adjustment Cutter Spindle Deck Shaft Spindle Hex Head Assembly Bolt / Nut Cutter Blade Spacers1/4" Washer Cutter Blade Hex Head Bolt Figure 10.

  • Page 11: Cutter Blades

    STEERING CABLE ROUTING Spacers SGB005 Figure 12. Repositioning Spacers Rear Steering Collar CUTTER BLADES CAUTION: Blades have a sharp cutting edge. Wear protective gloves or wrap blades with protective material when removing, sharpening and installing blades. Front Pulley Cable Should Not Angle Blade Back Touch At Crossover Point Do Not Cut In...

  • Page 12: Lubrication And Maintenance

    LUBRICATION & MAINTENANCE * Lubrication may be required every 8 to 40 hours, depending on climate and environment. Break-In + Compatible Greases: Mobilux #2 found at Mobil Service Stations (1st 10 Hours) Ronex MP found at Exxon Service Stations 8 Hours (Daily) Super Lube MEP #2 &...

  • Page 13: Troubleshooting Cutting Conditions

    TROUBLESHOOTING CUTTING CONDITIONS CAUSE CURE CONDITION Stringers - Occasional Low engine RPM Run engine at full 3600 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 Clean underside of deck...

  • Page 14: Troubleshooting

    TROUBLESHOOTING CAUSE CURE CONDITION Uneven Cut on Flat Lift worn off of 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 Deck mounted improperly See your authorized SCAG dealer...
  • Page 15 TROUBLESHOOTING 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 16: Technical Specifications

    TECHNICAL SPECIFICATIONS ENGINES General Type: Heavy duty industrial/commercial Brand: Kohler 20 HP Command & 22 HP Command Models: CV20S, CV22S Horsepower: 20HP @ 3600 RPM, 22HP @ 3600 RPM Type: 4 cycle gas, twin cylinder, vertical shaft engine Displacement: 20 HP= 624 cc, 22HP = 624 cc Cylinders: 2 cast-iron sleeves Governor:...
  • Page 17 TECHNICAL SPECIFICATIONS (CON'T) CUTTER DECKS SM 52, SM 61, SM 72 Type: Out-front design with anti-scalp roller and pneumatic shock absorber for deck flotation Construction: 10-gauge steel with 7-gauge (3/16") steel skirt Cutting Width: 52.0 " (132.0 cm), 61.0 " (155.0 cm), 71.5" (181.6 cm) Cutting Height Adjustment: Adjustable from 1-3/4"...
  • Page 18 SM-52, SM-61 & SM-72 CUTTER DECK 27 28 SGB009A...
  • Page 19 SM-52, SM-61, & SM-72 CUTTER DECK Ref. Part Ref. Part No. No. Description 52 61 72 No. No. Description 52 61 72 46729 Cutter Deck (Includes decals) 43277 Spacer 46748 Idler Arm (Incl. 38 & 47) 46730 Cutter Deck (Includes decals) 44078 J-Rod, Drive Idler 46620...

  • Page 20: Engine Deck

    ENGINE DECK SGB010A...
  • Page 21 ENGINE DECK Ref. Part Ref. Part Number Description Number Description 04003-01 Carriage Bolt, 1/4-20 x 6" 04063-06 Key, 1/4 x 1/4 x 1-1/2" 421703 Battery Box 04012-04 Hex Socket Set Screw, 5/16-18 x 3/8" 04029-01 Nut, Wing 1/4-20 48792 Pulley, Engine Pump Drive (Incl. 55) 48015 Battery 461073...

  • Page 22: Upper Hydraulics

    UPPER HYDRAULICS SGB027...
  • Page 23 UPPER HYDRAULICS Ref. Part Number Description 48711 Tank, Hydraulic 481164 Cap, Hydraulic Tank 48634 Hose, Pump to Oil Cooler 48942 Hose, Oil Cooler to Tank 48136-04 Clamp, Hose 48936-01 Coupling, Flare Swivel 48572-05 Tube, Union 48645 Oil Cooler Assembly 04003-12 Carriage Bolt, 5/16-18 x 3/4"...

  • Page 24: Lower Hydraulics

    LOWER HYDRAULICS...
  • Page 25 LOWER HYDRAULICS Ref. Part Number Description 04017-04 Capscrew, 1/4-20 x1/2 Serr. Fl. Hex Head 48462-02 Filter Head 48758 Filter, Spin-On Lube 48991 Hose Assembly 48688 Hose Assembly 48350-03 Elbow, 90 Degrees 04062-01 Hairpin Cotter 44088 Lever, Dump Valve 48353-02 Connector, Flare Swivel with Hose Barb 48136-04 Hose Clamp 48482...

  • Page 26: Control Linkage

    CONTROL LINKAGE sgb011...
  • Page 27 CONTROL LINKAGE Ref. Part Number Description 46328 Control Linkage, Bellcrank (Includes 30, 31) 04040-15 Flatwasher, 5/16 (.375 x .875 x .083) 04001-13 Bolt,Hex Head 5/16-18 x 2-3/4" 04001-19 Bolt, Hex Head 3/8-16 x 1" 04040-05 Flatwasher, 3/8 (.406 x .812 x .065) 43212 Sleeve, Pump Control Link 42658...

  • Page 28: Instrument Panel And Electrical Components

    INSTRUMENT PANEL AND ELECTRICAL COMPONENTS sgb013...
  • Page 29 Locknut, Elastic Stop 5/16-18 48029-15 Battery Cable, 36" Black 48029-13 Battery Cable, 25" Red 481268 Wire Harness, STHM 48788 Relay 481275 Wire Harness With Relay * Common hardware which should be purchased locally. All bolts grade 5 plated, all other fasteners zinc plate.
  • Page 30 RIDER FRAME ASSEMBLY 67,68 37 A sgb014...
  • Page 31 RIDER FRAME ASSEMBLY Ref. Part Ref. Part Number Description Number Description 46715 Steering Frame (Includes Bshgs and Fittings) 48005-03 Rim Only 48100-01 Bronze Bushing, 7/8 ID x 1.0 Flanged 48005 Rear Wheel Assy. (Includes items 33-36, 37A) 04050-03 Retaining Ring, 7/8 external 48005-02 Tire Only 04021-10...

  • Page 32: Brake Linkage

    BRAKE LINKAGE Deck Weldment SGB050...
  • Page 33 BRAKE LINKAGE Ref. Part Number Description 04019-04 Serr. Fl. HH Nut, 3/8-16 04021-05 Hex Locknut, 3/8-16 43032 Swivel 04062-01 Hairpin Cotter (.094 x 1.62) 04001-32 Hex Head Bolt, 3/8-16 x 1-1/4" 43212 Sleeve, Hydro Linkage 421338 Link, Cam 48342 Grip, Parking Brake 45504 Handle, Parking Brake 04041-07...

  • Page 34: Electrical System

    Ref. Part Ref. Part Number Description Number Description 48298 Fuse, 20 AMP Blade Automotive 48029-15 Battery Cable, 36" Black 481275 Wire Harness With Relay 48126 Rubber Boot 48028-05 Cable Tie 481268 Wire Harness, STHM 48029-13 Battery Cable, 25" Red...

  • Page 35: Winch Lift System

    WINCH LIFT SYSTEM Steering Frame sgb008 Ref. Part Ref. Part Number Description Number Description 48044 Winch Handle 48043 Winch Assembly (Incl. 1-7, 11-13, 15-23) 205015 Handle Nut 205155 Locknut, 7/16-14 204364 Handle Spring 404409 Ratchet Pawl 204359 Shaft Bushing 205167 Ratchet Bolt 404163 Pressure Washer...
  • Page 36 REPLACEMENT DECALS & iNFORMATION HEAVY DUTY COMMERCIAL 2, 2a, 2b HYDROSTATIC DRIVE MANUFACTURED UNDER ONE OR MORE OF THE FOLLOWING PATENTS: START / DRIVE PROCEDURE 4,487,006 4,991,382 PARKING BRAKE ENGAGE PARKING BRAKE 4,885,903 4,998,948 DISENGAGE MOWER DECK DRIVE DEPRESS FOOT INTERLOCK 4,920,733 5,118,617 SWITCH (LH) PEDAL...

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Sthm-20cvSthm-22cv

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