Scag Power Equipment SMST-61A Operator'S Manual Download Page 1 | Manualshive

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MODEL STT-31BSD

OPERATOR’S MANUAL

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 NO. 03153

PRINTED 10/04

PRINTED IN USA

© 2004
SCAG POWER EQUIPMENT
DIVISION OF METALCRAFT OF MAYVILLE, INC.

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Summary of Contents for SMST-61A

Page 1: ...ITH ASSISTANCE IN MAINTENANCE AND AD JUSTMENT PROCEDURES TO KEEP YOUR MOWER PERFORMING TO MAXIMUM EFFI CIENCY THE SPECIFIC MODELS THATTHIS BOOK COVERS ARE CONTAINED ON THE INSIDE COVER BEFORE OPERATIN...

Page 2: ...others off the tractor only one person at a time REMEMBER YOUR MOWER IS ONLY AS SAFE AS THE OPERATOR Hazard control and accident prevention are dependent upon the awareness concern prudence and proper...

Page 3: ...s 8 2 7 Safety and Instructional Decals 9 Section 3 Specifications 10 11 Section 4 Operating Instructions 4 1 Controls and Instrument Identification 12 4 2 Safety Interlock System 13 4 3 Initial Run I...

Page 4: ...r 33 7 7 Battery 33 7 8 Drive Belts 35 7 9 Cutter Blades 35 7 10 Tires 36 7 11 Cutter Deck Gearbox 36 7 12 Cooling System 37 7 13 Body Deck Hopper and Upholstery 38 Section 8 Illustrated Parts List No...

Page 5: ...operating position and facing the forward travel direction 1 3 SERVICING THE ENGINE AND DRIVE TRAIN COMPONENTS The detail servicing and repair of the engine hydraulic pumps and gearboxes are not cove...

Page 6: ...rt Spring Tension 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 OPERA...

Page 7: ...tting Element Basic Symbol Cutting Element Disengage Continuously Variable Linear Read Operator s Manual Keep Bystanders Away Pinch Point 481039S SYMBOL DESCRIPTION SYMBOL DESCRIPTION Hourmeter Elapse...

Page 8: ...information about safety To avoid injury and possible death carefully read the message Be sure to fully understand the causes of possible injury or death Signal Word It is a distinctive word found on...

Page 9: ...I ASAE S279 requirements Contact your local authorities for regulations and equipment requirements 15 DO NOT operate without the side discharge chute installed and in the down position or with an opti...

Page 10: ...9 DO NOT turn sharply Use care when backing up 10 Disengage power to cutter deck before crossing roads walks or gravel drives 11 Mow only in daylight or good artificial light 12 NEVER raise the deck...

Page 11: ...inal color of the webbing in these areas is extremely faded and or is packed with dirt the physical strength of this webbing may have deteriorated If this condition exists replace the seat belt system...

Page 12: ...drives lower implement set parking brake stop engine and remove key or disconnect spark plug wire to prevent accidental starting of the engine when servicing or adjusting the machine Wait for all move...

Page 13: ...2 7 SAFETY AND INSTRUCTIONAL DECALS WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR S MANUAL 481039 390S0150E Rev 1 481568 FORWARD REVERSE F R 482710 482290 482286 482285 481039 482...

Page 14: ...nts operation with parking brake engaged Frame Compact tractor frame with structural steel tubing construction DRIVE SYSTEM Type Hydro drive with two variable displacement pumps and two cast iron moto...

Page 15: ...ter Wheels 13 x 5 x 6 caster wheels with tapered roller bearing pivots Spindles Heavy duty 1 1 8 top dimension spindle shaft cast housing taper roller bearing low maintenance with top access grease fi...

Page 16: ...er drive system Pulling up on the switch will engage the deck drive Pushing down on the switch will disengage the deck drive 4 Glow Plug Indicator Figure 4 1 Yellow indicator turns off when the glow p...

Page 17: ...s clockwise until they stop allows the unit to move under hydraulic power The levers must be in this position and torqued to 10ft lbs during operation of the mower Rotating the levers counter clockwis...

Page 18: ...w indicator for the glow plugs goes out Then turn the ignition key to the START position and release the key as soon as the engine starts Do not hold the key in the START position for more than 15 sec...

Page 19: ...d to be made using the steering controls To steer left while traveling in reverse allow the left steering control lever to move forward The further the control is allowed to move forward the quicker t...

Page 20: ...Wet grass reduces traction and steering control The Roll Over Protection System is standard equipment for this machine See section 2 5 page 6 of this manual for further details 2 To prevent tipping o...

Page 21: ...scharge away from the obstacles to reduce the chance of property damage by thrown objects 3 Cut grass when it is dry and not too tall Do not cut grass too short cut off 1 3 or less of existing grass f...

Page 22: ...ired cutting height Push forward on the deck lift foot lever hold in place and lift up on the deck release lever Figure 4 7 Slowly release the foot pedal A deck height decal is located on the cutting...

Page 23: ...es Uncut Grass in Cutting Path Incorrect blade sharpening Sharpen blades Low engine RPM Run engine at full RPM Beltslipping Adjust belt tension Deck plugged grass accumulation Clean underside of deck...

Page 24: ...ized SCAG dealer Dullblade Sharpen blade TROUBLESHOOTING CONT D Sloping Ridge Across Tire pressures not equal Check and adjust tire pressure Width of Cutting Path Wheels uneven Check and adjust tire p...

Page 25: ...speed to adjust for conditions Wet grass Cut grass after it has dried out Step Cut Ridge Blades not mounted evenly Adjust pitch and level in Center of Cutting path Bent blade Replace blade Internalspi...

Page 26: ...trol rod and turning the rod until the proper distance is achieved See Figure 6 1 Tighten the jam nuts 4 With the brake in the engaged position check the distance between the lower nut on the brake ac...

Page 27: ...eel by loosening the jam nuts on the steering control rod and turning the rod until the drive wheel turns in the forward direction Turn the rod back until the drive wheel stops moving Turn the rod an...

Page 28: ...neutral adjustment must be made as described on page 21 2 If at full speed the mower pulls left it is an indication that the right wheel is turning faster than the left wheel To adjust this condition...

Page 29: ...the measurement at the front of the deck is not equal to the rear the cutter deck pitch must be adjusted as follows Cutter Deck Level The cutter deck should be level from side to side for proper cutti...

Page 30: ...an adjustment can be made using the deck height control rod See Figure 6 6 NOTE If an adjustment has to be made be sure that the cutter deck can easily be locked into the transport position Custom Cut...

Page 31: ...e Figures 6 9 through 6 11 for position 4 Reinstall the mounting hardware as shown See Figures 6 10 though 6 11 Torque hardware to 39ft lbs Figure 6 9 3 Custom Cut Baffle Position Figure 6 11 4 Custom...

Page 32: ...ution when checking the hydraulic hoses See paragraph 2 5 X Check coolant level See paragraph 7 12 X Check engine oil level See paragraph 7 4 X Clean mower See paragraph 7 14 X Check condition of blad...

Page 33: ...replace hydraulic oil Use SAE 20W50 Motor Oil X Replace hydraulic oil filter See paragraph 7 3 X Replace cutter deck gearbox lubricant See paragraph 7 1 X Change coolant See paragraph 7 12 7 2 LUBRIC...

Page 34: ...oints GREASE FITTING LUBRICATION LUBRICANT INTERVAL LITHIUM MP WHITE GREASE 2125 40 HOURS WEEKLY CHASSIS GREASE 100 HOURS BI MONTHLY CHASSIS GREASE 200 HOURS MONTHLY 4 1 6 3 5 7 2 CHASSIS GREASE 500 H...

Page 35: ...so be changed if the color of the fluid has become black or milky A black color and or a rancid odor usually indicates possible overheating of the oil and a milky color usually indicates water in the...

Page 36: ...e the oil filter after every 200 hours of operation or every month whichever occurs first Refer to Engine Operator s Manual for instructions See Figure 7 4 7 4 ENGINE OIL Figure 7 4 Engine Dipstick Fi...

Page 37: ...rvice periods To make it convenient for you we have installed an Air Cleaner Indicator which is located just behind the air filter The indicator window will turn red when it is time to service the air...

Page 38: ...any direction If fluid contact does occur follow first aid suggestions below BATTERY ELECTROLYTE FIRST AID EXTERNAL CONTACT Flush with water EYES Flush with water for at least 15 minutes and get medi...

Page 39: ...drive by pulling hard Do not attempt to straighten a bent blade and never weld a broken or cracked blade Always replace it with a new blade to assure safety B Blade Sharpening NOTE If possible use a f...

Page 40: ...the cutter blade NOTE Be sure that the blade is installed with the lift wing toward the top 5 Install the spacer onto the blade bolt and insert the bolt into the cutter spindle shaft Figure 7 10 Blade...

Page 41: ...before each day of operation 1 Remove the radiator cap by turning it slowly counterclockwise to the first stop and allow any pressure to be released Push down on the cap and turn counterclockwise to r...

Page 42: ...r if the belt is in need of adjustment or replacement Do not wash any portion of the equipment while it is hot Do not wash the engine use compressed air CAUTION 1 After each use wash the mower and cut...

Page 43: ...39 NOTES...

Page 44: ...A A B B 4 14 29 20 53 28 52 24 58 24 52 66 32 13 68 55 55 29 58 2 3 13 23 57 3 11 50 13 46 60 49 67 24 35 48 9 16 19 15 27 26 12 47 51 23 23 36 37 44 39 43 42 38 45 41 34 72 22 40 37 18 10 1 5 7 6 8 S...

Page 45: ...udes Decals 2 04003 04 Bolt Carriage 5 16 18 x 1 3 04019 04 Nut Hex Serrated Flange 3 8 16 4 481625 01 Wing nut 3 8 16 5 481632 Anti Scalp Wheel 6 04003 26 Bolt Carriage 3 8 16 x 4 7 422478 Anti Scalp...

Page 46: ...ROLS STT2002CDC 21 19 37 42 4 6 14 10 42 5 2 3 35 23 41 38 32 34 30 7 27 33 40 41 28 28 24 26 41 40 CUTTER DECK 13 40 39 31 41 40 39 43 9 8 45 20 18 36 16 44 17 41 40 26 11 29 22 40 41 15 22 41 7 1 40...

Page 47: ...8 Spring Helper 61 72 Cutter Decks Only 23 422451 Foot Pedal Height Adjustment 24 04020 09 Nut Hex 5 8 11 25 04019 03 Nut Hex Serrated Flange 5 16 18 26 04040 09 Flatwasher 5 8 656 x 1 312 x 095 27 04...

Page 48: ...48 15 50 26 30 25 12 15 19 9 1 23 24 A 31 32 33 34 29 33 36 37 40 39 38 41 42 43 55 35 44 15 27 22 54 20 28 15 14 13 12 11 10 16 17 A 20 5 3 4 8 7 18 18 56 57 58 54 6 51 53 52 49 45 15 12 61 64 59 62...

Page 49: ...H 36 481025 Seal 2 00 OD x 1 625 Bore 37 04021 07 Nut Hex Elastic Stop 1 2 13 38 451416 Yoke Weldment Caster 61A 72A 39 04001 167 Bolt Hex Head 1 2 13 x 9 1 2 61A 72A 40 43583 Sleeve Caster Wheel 61A...

Page 50: ...46 STT ROLL OVER PROTECTION SYSTEM STT BSD 2005 ROPS SEAT BELT BRACKET 1 2 2 3 3 4 4 5 5 6 6 7 8 9 10 11 12 13 14 14 SEAT BELT BRACKET 15 15...

Page 51: ...00 x 1 25 x 083 6 483150 Seat Belt 7 04001 45 Bolt Hex Head 3 8 16 x 2 8 04041 07 Flatwasher 3 8 391 x 938 x 105 9 43606 Sleeve Seat Base Mounting 10 04021 09 Nut Elastic Stop 3 8 16 11 04001 09 Bolt...

Page 52: ...14 15 16 17 18 19 20 21 22 22 23 24 24 25 25 26 27 27 28 29 30 31 32 33 34 35 36 37 38 42 40 41 39 43 43 35 44 44 45 46 47 43 35 50 51 52 53 43 55 54 43 55 45 57 43 58 48 49 35 59 60 61 59 62 63 64 65...

Page 53: ...001 46 Bolt Hex Head 3 8 16 x 2 25 40 04019 04 Nut Serr Flg 3 8 16 41 48181 Pulley PTO Idler 42 04001 136 Bolt Hex Head 3 8 16 x 1 5 Grade 8 43 04043 04 Flat Washer 3 8 Grade 8 44 481522 Spring 45 482...

Page 54: ...0 19 18 27 45 47 26 44 25 44 22 53 23 24 44 44 31 28 29 49 32 53 26 34 43 48 22 25 44 44 47 40 41 37 33 45 39 38 35 42 36 42 30 16 10 63 62 65 64 66 67 55 9 58 57 55 61 9 60 9 C D STT BSD 2002EAP 2 1...

Page 55: ...4 Mounting Bracket Water Seperator 35 451083 Debris Screen 36 482368 Hose Air Intake 37 482405 Air Cleaner Assembly w mounting Band 38 481816 Pre Cleaner Engine Air 39 481924 Adapter Pre Cleaner 40 48...

Page 56: ...3 48 47 46 5 23 53 42 43 44 45 15 56 70 69 71 62 15 65 60 64 67 60 52 41 34 23 51 50 34 35 TO RH PUMP TO LH PUMP 37 36 27 28 35 33 78 34 31 30 29 8 9 6 32 13 B 9 B 25 18 72 49 55 54 5 3 4 75 26 58 76...

Page 57: ...r 40 04001 31 Bolt Hex Head 3 8 16 x 2 1 2 41 48114 04 Grease Fitting 42 461082 Lever Parking Brake Includes item 43 43 481548 Grip Parking Brake Ref Part No No Description Ref Part No No Description...

Page 58: ...24 26 40 32 36 37 Z 34 25 35 21 31 33 9 30 30 57 56 54 7 4 4 3 44 45 50 46 51 53 52 49 4 4 2 42 34 25 35 55 18 8 20 19 6 22 41 27 28 29 30 38 Z 2 2 5 58 59 7 7 22 4 4 43 2 43 2 7 1 To Back Side of Re...

Page 59: ...ead 1 4 20 31 48571 02 Cap 32 461452 Fuel Tank Assembly includes items 23 24 33 48136 05 Clamp Hose 34 48350 05 Elbow 90 Degree 7 8 14 THD 35 48938 02 Bushing 7 8 14 JIC x 3 4 16 O Ring Ref Part No No...

Page 60: ...B A C C B A 1 2 3 4 5 6 7 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 22 21 20 24 25 24 25 24 25 26 22 21 27 27 1 2 19 28 29 30 31 32 33 34 35 36 36 37 D D 19 38 2005STTBSD EES GLOW PLUGS STARTER...

Page 61: ...18 48298 Fuse 20 Amp 19 483057 Harness Wiring 20 04010 01 Screw 10 32 x 5 Phillips 21 04020 01 Nut Hex 10 32 22 04031 01 Lock Washer 10 23 483013 Relay 24 04001 01 Bolt Hex Head 1 4 20 x 75 25 04030 0...

Page 62: ...58 HYDRAULIC PUMP ASSEMBLY STT 2K BDP 21 11 4 9 11 2 12 10 6 8 7 18 5 14 17 19 20 22 21 23 24 16 25 26 28 27 3 Overhaul Seal Kit 1 3 25 13 15 HYDRAULIC PUMP ASSEMBLY BDP 21L...

Page 63: ...eck Plug Spring O Ring Orifice Check Valve 12 HG 2513030 Bypass Valve Kit Includes Bypass Valve O Ring Back up Ring 13 HG 50619 Valve Plate 14 HG 70080 Cylinder Block Kit 15 HG 50574 Trunion Seal Reta...

Page 64: ...60 WIRE HARNESS STT 31BSD PART NUMBER 483057...

Page 65: ...2286 481955 61A 481956 71A 48656 48404 481568 482290 481039 482528 482565 482580 481971 WARNING INSTALL BELT COVER BEFORE OPERATING MACHINE READ OPERATOR S MANUAL 481039 FORWARD REVERSE F R 482360 200...

Page 66: ...62 REPLACEMENT DECALS AND INFORMATION PLATES 481921 R 482581 2005 STT 31BSD Decals 2 481925 481664 481663 483154 481663 481664 482581 481937 48314 48825 482165 482367 482834...

Page 67: ...er to the dealer for warranty work and the expense of returning it to the owner after repair will be paid for by the owner Scag s responsibility is limited to making the required repairs and no claim...

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