Scag Power Equipment STHM manual

MODEL STHM OPERATOR’S MANUAL THIS MANUAL CONT AINS THE OPERA TING INSTRUCTIONS AND SAFETY INFORMA- TION FOR YOUR SCAG MOWER. READING THIS MANUAL CAN PROVIDE YOU WITH ASSIST ANCE IN MAINTENANCE AND AD- JUSTMENT PROCEDURES TO KEEP YOUR MOWER PERFORMING T O MAXIMUM EFFI- CIENCY . THE SPECIFIC MODELS THA T THIS BOOK COVERS ARE CONT AINED ON THE INSID[...]

F AILURE TO FOLLOW SAFE OPERA TING PRACTICES MA Y RESUL T IN SERIOUS INJUR Y . * 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. * Keep hands, feet and[...]

T ABLE OF CONTENTS MODEL STHM SUBJECT P A GE Introduction .................................................................................................. 1 General Safety Instructions .......................................................................... 1 Signal W ords ........................................................................[...]

T ABLE OF CONTENTS (CONTINUED) SUBJECT P A GE Illustrated Parts List SM 61V , 72A Cutter Deck...................................................................... .. . 2 2- 2 3 Engine Deck ..................................................................................... 24-25 Upper Hydraulics ...................................................[...]

1 SIGNAL W ORDS This symbol means “Attention! Become Alert! Your Safety is Involved!". The symbol is used with the following signal words to attract your attention to safety messages found on the decals and throughout this manual. The message that follows the symbol contains important information about safety. To avoid injury and possible de[...]

2 CE Mark T ransmission Choke On/Start Spring T ension on Idler Oil Off/Stop SYMBOL DESCRIPTION SYMBOL DESCRIPTION ISO Symbols Spinning Blade 48071S Parking Brake WARNING FALLING HAZARD USE ONLY SCAG APPROVED RIDING ATTACHMENTS SEE OPERATOR'S MANUAL 481109 Falling Hazard Thown Object Hazard[...]

3 Slow Fast Cutting Element - Engage Cutting Element - Basic Symbol Cutting Element - Disengage Continuously V ariable - Linear Keep Bystanders A way Pinch Point 481039S SYMBOL DESCRIPTION SYMBOL DESCRIPTION Hourmeter/Elapsed Operating Hours Thown Object Hazard Read Operator's Manual[...]

4 BEFORE OPERA TING 1. NEVER allow children to operate this riding mower . Do not allow adults to operate this machine without proper instructions. 2. DO NOT mow when children and/or others are present. Keep children out of the mowing area and in the watchful care of a responsible adult other than the operator . Be alert and turn machine off if a c[...]

5 10. Keep hands and feet away from cutting units. 11. Shut the engine off and wait until the blades come to a complete stop before removing the grass catcher container. 12. Never raise the cutter deck while the blades are rotating. 13. Always park the mower and/or start the engine on a level surface. Apply the parking brake to prevent the mower fr[...]

6 MAINTENANCE AND ST ORA GE 1. Disconnect the spark plug wire from the spark plug to prevent accidental starting of the engine when servicing, adjusting or storing the machine. 2. If the mower must be tipped to perform mainte- nance or adjustment, remove the battery, drain the gasoline from the fuel tank and the oil from the crankcase. Use jack sta[...]

7 Hydraulic fluid is under high pressure. Keep body and hands away from pinholes or nozzles that eject hydraulic fluid under high pressure. If you need service on your hydraulic system, please see your authorized Scag dealer . If hydraulic fluid is injected into the skin, it must be surgically removed within a few hours by a doctor or gangrene may [...]

8 MO WER OPERA TION -NOTE- Use gasoline with an octane rating no less than 87. * The right hand foot pedal must be in the NEUTRAL position. * The blade clutch switch must be in the OFF position. * The parking brake must be ON. 3. Start the engine: * Choke as required. If the engine is cold, pull the choke knob out. When the engine starts, slowly pu[...]

9 6. When driving over curbs, disengage the cutter blades and raise the cutter deck to clear the curb. Drive forward over the curb. After the curb is clear, lower the cutter deck back to normal operating position. Be sure to leave slack in the cable after lowering the cutter deck. 7. To "freewheel" or move the machine around without the e[...]

10 If the drive wheels consistently rotate when foot pedal control is in neutral, go to step 4. If the drive wheels inconsistently rotate, i.e. drive wheels sometimes rotate and sometimes do not when foot pedal is not depressed, then check neutral adjustment bolt for "zero free play" in neutral control spring . -NOTE- If there is free pla[...]

11 Adjust the tension by tightening or loosening the nut on the J-bolt. (See Figure 9). 4. Replace the belt covers. BEL T ALIGNMENT Belt alignment is important for proper performance of your Scag mower. If you experience frequent belt wear or breakage, see your authorized Scag Service Dealer for belt adjustment. CUTTER DECK ADJUSTMENTS Due to the m[...]

12 Adjusting the blade height can be done by moving any number of the five smaller spacers on the blade mount- ing bolts to the top or to the bottom of the spindle shaft. All blades should be positioned equally (See Figure 10). The unit is shipped with one spacer on top of spindle and four underneath (See Figure 10). This adjustment does not affect[...]

13 A . 3" Position - baffle is installed using the top set of holes on the front baffle welded inside the cutter deck. (See Figure 15). The Advantage cutter deck will deliver the best quality-of-cut in very tall, wiry , tough to cut grass. B . 3-1/2" Position (factory setting, Advantage Deck) - baffle is installed using the middle set of [...]

14 3. Move the Custom-Cut Baffle to desired position. (See Figures 15 through 17 for position). 4. Reinstall the mounting hardware as shown. (See Figures 15 though 17). T orque hardware to 39ft.lbs. Figure 15. 3" Custom-Cut Baffle Position Figure 17. 4" Custom-Cut Baffle Position Figure 16. 3-1/2" Custom-Cut Baffle Position 2004 CCB [...]

15 8 Hours (Daily) 25 Hours 40 Hours (Weekly) 100 Hours (Biweekly) 200 Hours (Monthly) X X X X X X X X X X X X 500 Hours or Annually * COMMENTS Add oil as needed - SAE 10W30 Do not over fill MORE OFTEN IF NEEDED US Lithium MP White Grease 2125+ MORE OFTEN IF NEEDED MORE OFTEN IF NEEDED Add or adjust as required Distilled water only Chassis grease C[...]

16 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 Belts slipping Adjust belt tensions Streaking - Stri[...]

17 CONDITION TROUBLESHOOTING CAUSE CURE Sloping Ridge Across Tire pressures not equal Check and adjust tire pressure Width of Cutting Path Wheels uneven Check and adjust tire pressure Deck mounted incorrectly See your authorized SCAG dealer Uneven Cut on Flat Lift worn off of blade Replace blade Ground - Wavy High-Low Blade upside down Mount with c[...]

18 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 May need to reduce ground speed, rai[...]

19 TECHNICAL SPECIFICA TIONS ENGINES General Type: Heavy duty industrial/commercial Brand: Kohler 23 HP Pro Series (Spec PS-75523) Models: CV23S Horsepower: 23HP @ 3600 RPM Type: 4 cycle gas, twin cylinder, vertical shaft engine Displacement: 23HP = 674 cc Cylinders: 2 cast-iron sleeves Governor: Mechanical type governor with variable speed control[...]

20 TECHNICAL SPECIFICA TIONS (CON'T) CUTTER DECKS SM61V, SM 72A 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: 61.0 " (155.0 cm), 71.5" (181.6 cm) Cutting Height Adjustment: Adjustable from 1-3/4" to 5[...]

21 NOTES[...]

22 SM-61V & SM-72A CUTTER DECK 54 69 85 80 38 80 85 84 45 86 83 4 81 82 72 73 76 78 77 79 75 21 71 25 70 3 8 67 66 65 8 68 1 55 56 38 60 64 63 59 58 62 6 5 5 2 3 15 16 17 27 28 7 8 9 26 10 7 9 13 10 8 14 8 10 7 9 11 12 29 32 35 36 37 43 34 39 37 40 29 41 30 44 30 20 33 48 38 47 46 47 50 51 49 32 29 43 18 30 29 25 20 19 21 23 21 22 53 17 24 33 3[...]

23 1 461861 Cutter Deck, Velocity + (Incl. decals) x 1 461864 Cutter Deck, Advantage (Incl. decals) x 2 461846 Discharge Chute, Velocity Plus x 461296 Discharge Chute, Advantage x 3 04001-09 Bolt, 5/16-18 x 1" Hex Head x x 4 04021-10 Nut, 5/16-18 Elastic Stop x x 5 04029-03 Wing Nut, 3/8-16 x x 6 461583 Be lt Cover (Incl. Decals) x 6 46848 Bel[...]

24 ENGINE DECK 20 19 23 22 24 25 22 28 31 30 31 28 38 36 38 37 33 45 51 46 40 35 34 56 65 75 57 58 62 61 69 72 71 66 102 19 29 50 16 76 78 79 91 81 92 19 73 69 68 54 70 67 86 87 89 16 83 83 16 16 16 96 19 19 94 19 18 19 95 19 16 3 14 17 12 93 18 38 13 8 77 5 6 4 39 2 22 26 15 90 39 29 21 1 9 88 85 63 59 60 52 32 49 47 48 41 42 43 44 80 83 74 10 11 [...]

25 Ref. Part No. Number Description 1 04003-01 Carriage Bolt, 1/4-20 x 6" 2 423308 Battery Box 3 04029-01 Nut, Wing 1/4-20 4 48015 Battery 5 42392 Battery Cover 6 48099 Insulation, Battery Cover 7 48292 Pad, Fuel Tank Strap 8 481556 Cap, Fuel Tank 9 46846 Fuel Tank Assy. (Includes items 10 - 11) 10 48309 Bushing, Fuel Tank Valve 11 48308 Fuel [...]

26 SGB027 UPPER HYDRAULICS 5 2 4 7 6 5 12 10 8 12 13 11 1 3 9 16 14 14 14 9 9 24 22 14 9 15 A 14 23 5 A 3 21 18 19 17 20[...]

27 Ref. Part No. Number Description 1 48711 Tank, Hydraulic 2 481164 Cap, Hydraulic Tank 3 48634 Hose, Pump to Oil Cooler 4 48942 Hose, Oil Cooler to Tank 5 48136-04 Clamp, Hose 6 48936-01 Coupling, Flare Swivel 7 48572-05 Tube, Union 8 48645 Oil Cooler Assembly 9 04003-12 Carriage Bolt, 5/16-18 x 3/4" 10 421279 Bracket, Oil Cooler 11 48350-05[...]

28 H G A B C D E F C G D E J F B A H J I I LOWER HYDRAULICS 11 1 10 22 2 20 31 30 25 13 15 9 6 23 10 21 3 17 15 14 13 13 11 13 12 5 6 8 16 18 17 4 20 19 19 20 25 4 28 28 9 7 32 32 26 24 26 26 5 26 26 28 28 27 18 29 26 27 26 21 13 33 LO WER HYDRA ULICS[...]

29 Ref. Part No. Number Description 1 04017-04 Capscrew, 1/4-20 x1/2 Serr. Fl. Hex Head 2 48462-02 Filter Head 3 48758 Filter, Spin-On Lube 4 48991 Hose Assembly 5 48688 Hose Assembly 6 48350-03 Elbow, 90 Degrees 7 04062-01 Hairpin Cotter 8 44088 Lever, Dump Valve 9 48353-02 Connector, Flare Swivel with Hose Barb 10 48136-04 Hose Clamp 11 48482 Hos[...]

30 10 11 14 15 12 13 17 16 18 17 14 20 8 5 9 21 10 23 24 11 13 15 2 26 14 8 5 7 6 5 4 5 4 31 30 28 11 27 3 1 6 31 CONTROL LINKAGE 29 19 25 12 sgb011 CONTROL LINKA GE[...]

31 Ref. Part No. Number Description 1 46328 Control Linkage, Bellcrank (Includes 30, 31) 2 04040-15 Flatwasher, 5/16 (.375 x .875 x .083) 3 04001-13 Bolt, Hex Head 5/16-18 x 2-3/4" 4 04001-19 Bolt, Hex Head 3/8-16 x 1" 5 04040-05 Flatwasher, 3/8 (.406 x .812 x .065) 6 43212 Sleeve, Pump Control Link 7 42658 Link, Speed Control 8 04021-05 [...]

32 8 7 2 C 21 3 9 6 13 4 9 10 14 15 12 21 15 5 13 19 10 A E F 11 17 16 17 18 18 9 24 21 26 23 22 28 30 31 32 33 29 27 31 32 33 35 34 25 25 INSTRUMENT PANEL AND ELECTRICAL COMPONENTS D 1 21 B 20 STHM99IP&E PTO Switch Connector INSTRUMENT P ANEL AND ELECTRICAL COMPONENTS[...]

33 INSTR UMENT P ANEL AND ELECTRICAL COMPONENTS Ref. Part No. Number Description 1 461360 Instrument Panel (includes Decal) 2 48298 Blade Fuse, 20 amp. 3 482289 Decal, Instrument Panel 4 48023 Hour Meter (includes Bracket and Hardware A, B, C) A * Hour Meter Bracket B * Lockwasher, #10 Ext. Tooth C * Hex Nut, 10-24 5 481755 Ammeter (includes Bracke[...]

34 14 17 RIDER FRAME ASSEMBLY 19 22 23 24 24 25 27 28 29 30 36 32 33 34 35 38 39 19 31 47 48 45 49 50 51 52 53 52 56 57 60 58 52 51 42 64 61 62 63 65 1 2 3 4 5 6 7 5 8 21 20 18 14 16 15 9 10 11 12 13 26 40 46 41 43 42 44 45 42 66 58 55 59 2 42 37 37 A 55 55 54 STHM99RFA 67,68 RIDER FRAME ASSEMBL Y[...]

35 36 481894 Rim Only 37 48005 Rear Wheel Assy. (includes items 33-36, 37A) 37A 481893 Tire Only 38 43021 Sleeve, Rear Wheel 39 43020-02 Spacer, Rear Wheel 40 48828 Cable, Steering (includes Hardware) 41 45606 Pedal, Foot Safety Switch 42 48114-04 Grease Fitting 43 04021-11 Hex Elastic Stop Nut, 7/16-14 44 04010-17 Screw, Phillips flat hd #10-32 x [...]

36 4 3 2 5 10 6 7 9 10 11 6 14 15 5 13 11 1 12 11 10 5 10 6 6 11 6 11 11 24 23 22 21 20 19 18 17 16 4 12 BRAKE LINKAGE 8 Deck Weldment 6 SGB050[...]

37 Ref. Part No. Number Description BRAKE LINKA GE 1 04019-04 Serr. Fl. HH Nut, 3/8-16 2 04021-05 Hex Locknut, 3/8-16 3 43032 Swivel 4 04062-01 Hairpin Cotter (.094 x 1.62) 5 04001-32 Hex Head Bolt, 3/8-16 x 1-1/4" 6 43212 Sleeve, Hydro Linkage 7 421338 Link, Cam 8 48342 Grip, Parking Brake 9 45504 Handle, Parking Brake 10 04041-07 Flat Washer[...]

38 RELA Y RED BLUE BLA CK SC481275 WIRE HARNESS WITH RELAY PART NO. 481275 GREEN To Starter Red Battery Cable Post To Blue Wire From Engine To Starter To Engine Ground ENGINE GND ST ARTER SOLENOID T O ENGINE KEY SWITCH FOO T PEDAL INTERLOCK BRAKE INTERLOCK MO WER CLUTCH POSITIVE HOURMETER NEGA TIVE HOURMETER FUSES POSITIVE AMMETER NEGA TIVE AMMETER[...]

39 14 48044 Winch Handle 15 205015 Handle Nut 16 204364 Handle Spring 17 208328 Shaft Bushing 18 404163 Pressure Washer 19 404164 Ratchet Wheel 20 204362 Pressure Plate 21 204012 Shaft Bushing 22 205116 E-Ring 23 304758 Drive Shaft 24 04017-27 Serr. Flg. HH Capscrew, 3/8-16 x 1" 25 04019-04 Serr. Flg. HH Nut, 3/8-16 Ref. Part No. Number Descri[...]

40 Ref. Part No. Number Description 6 482289 Decal, Instrument Panel 7 481039 Decal, Warning-Belt Cover 8 48993 Decal, Dump Valve 9 48404 Decal, Metalcraft-Made In USA 10 483201 Decal, 61 Velocity Plus 11 481956 Decal, 72 Advantage 12 482817 Decal, Height of Cut Ref. Part No. Number Description 1 481971 Decal, Heavy Duty Commercial 2 48314 Decal, S[...]

LIMITED W ARRANTY - COMMERCIAL EQUIPMENT Any part of the Scag commercial mower manufactured by Scag Power Equipment and found, in the reasonable judgment of Scag, to be defective in materials or workmanship, will be repaired or replaced by an Authorized Scag Service Dealer without charge for parts and labor during the periods specified below . This[...]